Add versions for PySide6, PyQt6 & PySide2.

Break down examples into module files to make easier to read. Use
full-definitions on Enums (PyQt6 compatible, better documenting).
Add fixes for Qt6 versions & some general bugfixes.

pyqt6/demos/browser/README.md

@@ -0,0 +1,15 @@
+# Mooseache — How web browsers would be if they'd just been invented
+
+This is an example web browser built with Python and Qt. Using the
+QtWebEngineWidgets system introduced in Qt5.6, this provides a single-window
+browsing experience with the usual controls, as well as saving and loading HTML.
+
+![Browser](screenshot-browser.jpg)
+
+> If you want to learn more about build GUI applications with Python,
+take a look at [Python GUIs](https://www.pythonguis.com/)
+which covers everything you need to know to start building your own applications with PyQt5.
+
+## Other licenses
+
+Icons used in the application are by [Yusuke Kamiyaman](http://p.yusukekamiyamane.com/).

pyqt6/demos/browser/main.py

@@ -0,0 +1,257 @@
+import os
+import sys
+
+from PyQt6.QtCore import QSize, Qt, QUrl
+from PyQt6.QtGui import QAction, QIcon, QKeySequence, QPixmap, QShortcut
+from PyQt6.QtPrintSupport import QPrintPreviewDialog
+from PyQt6.QtWebEngineWidgets import QWebEngineView
+from PyQt6.QtWidgets import (
+    QApplication,
+    QDialog,
+    QDialogButtonBox,
+    QFileDialog,
+    QLabel,
+    QLineEdit,
+    QMainWindow,
+    QStatusBar,
+    QToolBar,
+    QVBoxLayout,
+)
+
+
+class AboutDialog(QDialog):
+    def __init__(self):
+        super().__init__()
+
+        QBtn = QDialogButtonBox.StandardButton.Ok  # No cancel
+        self.buttonBox = QDialogButtonBox(QBtn)
+        self.buttonBox.accepted.connect(self.accept)
+        self.buttonBox.rejected.connect(self.reject)
+
+        layout = QVBoxLayout()
+
+        title = QLabel("MooseAche")
+        font = title.font()
+        font.setPointSize(20)
+        title.setFont(font)
+
+        layout.addWidget(title)
+
+        logo = QLabel()
+        logo.setPixmap(QPixmap(os.path.join("images", "ma-icon-128.png")))
+        layout.addWidget(logo)
+
+        layout.addWidget(QLabel("Version 23.35.211.233232"))
+        layout.addWidget(QLabel("Copyright 2015 MooseAche Inc."))
+
+        for i in range(0, layout.count()):
+            layout.itemAt(i).setAlignment(Qt.AlignmentFlag.AlignHCenter)
+
+        layout.addWidget(self.buttonBox)
+
+        self.setLayout(layout)
+
+
+class MainWindow(QMainWindow):
+    def __init__(self):
+        super().__init__()
+
+        self.browser = QWebEngineView()
+        self.browser.setUrl(QUrl("http://google.com"))
+
+        self.browser.urlChanged.connect(self.update_urlbar)
+        self.browser.loadFinished.connect(self.update_title)
+        self.setCentralWidget(self.browser)
+
+        self.status = QStatusBar()
+        self.setStatusBar(self.status)
+
+        navtb = QToolBar("Navigation")
+        navtb.setIconSize(QSize(16, 16))
+        self.addToolBar(navtb)
+
+        self.shortcut_open = QShortcut(QKeySequence("F5"), self)
+        self.shortcut_open.activated.connect(self.browser.reload)
+
+        back_btn = QAction(QIcon(os.path.join("images", "arrow-180.png")), "Back", self)
+        back_btn.setStatusTip("Back to previous page")
+        back_btn.triggered.connect(self.browser.back)
+        navtb.addAction(back_btn)
+
+        next_btn = QAction(
+            QIcon(os.path.join("images", "arrow-000.png")),
+            "Forward",
+            self,
+        )
+        next_btn.setStatusTip("Forward to next page")
+        next_btn.triggered.connect(self.browser.forward)
+        navtb.addAction(next_btn)
+
+        reload_btn = QAction(
+            QIcon(os.path.join("images", "arrow-circle-315.png")),
+            "Reload",
+            self,
+        )
+        reload_btn.setStatusTip("Reload page")
+        reload_btn.triggered.connect(self.browser.reload)
+        navtb.addAction(reload_btn)
+
+        home_btn = QAction(QIcon(os.path.join("images", "home.png")), "Home", self)
+        home_btn.setStatusTip("Go home")
+        home_btn.triggered.connect(self.navigate_home)
+        navtb.addAction(home_btn)
+
+        navtb.addSeparator()
+
+        self.httpsicon = QLabel()  # Yes, really!
+        self.httpsicon.setPixmap(QPixmap(os.path.join("images", "lock-nossl.png")))
+        navtb.addWidget(self.httpsicon)
+
+        self.urlbar = QLineEdit()
+        self.urlbar.returnPressed.connect(self.navigate_to_url)
+        navtb.addWidget(self.urlbar)
+
+        stop_btn = QAction(
+            QIcon(os.path.join("images", "cross-circle.png")),
+            "Stop",
+            self,
+        )
+        stop_btn.setStatusTip("Stop loading current page")
+        stop_btn.triggered.connect(self.browser.stop)
+        navtb.addAction(stop_btn)
+
+        # Uncomment to disable native menubar on Mac
+        # self.menuBar().setNativeMenuBar(False)
+
+        file_menu = self.menuBar().addMenu("&File")
+
+        open_file_action = QAction(
+            QIcon(os.path.join("images", "disk--arrow.png")),
+            "Open file...",
+            self,
+        )
+        open_file_action.setStatusTip("Open from file")
+        open_file_action.triggered.connect(self.open_file)
+        file_menu.addAction(open_file_action)
+
+        save_file_action = QAction(
+            QIcon(os.path.join("images", "disk--pencil.png")),
+            "Save Page As...",
+            self,
+        )
+        save_file_action.setStatusTip("Save current page to file")
+        save_file_action.triggered.connect(self.save_file)
+        file_menu.addAction(save_file_action)
+
+        print_action = QAction(
+            QIcon(os.path.join("images", "printer.png")),
+            "Print...",
+            self,
+        )
+        print_action.setStatusTip("Print current page")
+        print_action.triggered.connect(self.print_page)
+        file_menu.addAction(print_action)
+
+        help_menu = self.menuBar().addMenu("&Help")
+
+        about_action = QAction(
+            QIcon(os.path.join("images", "question.png")),
+            "About MooseAche",
+            self,
+        )
+        about_action.setStatusTip("Find out more about MooseAche")  # Hungry!
+        about_action.triggered.connect(self.about)
+        help_menu.addAction(about_action)
+
+        navigate_mozarella_action = QAction(
+            QIcon(os.path.join("images", "lifebuoy.png")),
+            "MooseAche Homepage",
+            self,
+        )
+        navigate_mozarella_action.setStatusTip("Go to MooseAche Homepage")
+        navigate_mozarella_action.triggered.connect(self.navigate_mozarella)
+        help_menu.addAction(navigate_mozarella_action)
+
+        self.show()
+
+        self.setWindowIcon(QIcon(os.path.join("images", "ma-icon-64.png")))
+
+    def update_title(self):
+        title = self.browser.page().title()
+        self.setWindowTitle("%s - MooseAche" % title)
+
+    def navigate_mozarella(self):
+        self.browser.setUrl(QUrl("https://www.pythonguis.com/"))
+
+    def about(self):
+        dlg = AboutDialog()
+        dlg.exec()
+
+    def open_file(self):
+        filename, _ = QFileDialog.getOpenFileName(
+            self,
+            "Open file",
+            "",
+            "Hypertext Markup Language (*.htm *.html);;" "All files (*.*)",
+        )
+
+        if filename:
+            with open(filename, "r") as f:
+                html = f.read()
+
+            self.browser.setHtml(html)
+            self.urlbar.setText(filename)
+
+    def save_html(self, html):
+        with open(self.save_file, "w") as f:
+            f.write(html)
+
+    def save_file(self):
+        filename, _ = QFileDialog.getSaveFileName(
+            self,
+            "Save Page As",
+            "",
+            "Hypertext Markup Language (*.htm *html);;" "All files (*.*)",
+        )
+
+        if filename:
+            self.save_file = filename
+            self.browser.page().toHtml(self.save_html)
+
+    def print_page(self):
+        dlg = QPrintPreviewDialog()
+        dlg.paintRequested.connect(self.browser.print_)
+        dlg.exec()
+
+    def navigate_home(self):
+        self.browser.setUrl(QUrl("http://www.google.com"))
+
+    def navigate_to_url(self):  # Does not receive the Url
+        q = QUrl(self.urlbar.text())
+        if q.scheme() == "":
+            q.setScheme("http")
+
+        self.browser.setUrl(q)
+
+    def update_urlbar(self, q):
+        if q.scheme() == "https":
+            # Secure padlock icon
+            self.httpsicon.setPixmap(QPixmap(os.path.join("images", "lock-ssl.png")))
+
+        else:
+            # Insecure padlock icon
+            self.httpsicon.setPixmap(QPixmap(os.path.join("images", "lock-nossl.png")))
+
+        self.urlbar.setText(q.toString())
+        self.urlbar.setCursorPosition(0)
+
+
+if __name__ == "__main__":
+    app = QApplication(sys.argv)
+    app.setApplicationName("MooseAche")
+    app.setOrganizationName("MooseAche")
+    app.setOrganizationDomain("MooseAche.org")
+
+    window = MainWindow()
+
+    app.exec()

pyqt6/demos/browser/main_new_windows.py

@@ -0,0 +1,277 @@
+import os
+import sys
+
+from PyQt6.QtCore import QSize, Qt, QUrl
+from PyQt6.QtGui import QAction, QIcon, QPixmap
+from PyQt6.QtPrintSupport import QPrintPreviewDialog
+from PyQt6.QtWebEngineCore import QWebEnginePage
+from PyQt6.QtWebEngineWidgets import QWebEngineView
+from PyQt6.QtWidgets import (
+    QApplication,
+    QDialog,
+    QDialogButtonBox,
+    QFileDialog,
+    QLabel,
+    QLineEdit,
+    QMainWindow,
+    QStatusBar,
+    QToolBar,
+    QVBoxLayout,
+)
+
+
+class AboutDialog(QDialog):
+    def __init__(self):
+        super().__init__()
+
+        QBtn = QDialogButtonBox.StandardButton.Ok  # No cancel
+        self.buttonBox = QDialogButtonBox(QBtn)
+        self.buttonBox.accepted.connect(self.accept)
+        self.buttonBox.rejected.connect(self.reject)
+
+        layout = QVBoxLayout()
+
+        title = QLabel("MooseAche")
+        font = title.font()
+        font.setPointSize(20)
+        title.setFont(font)
+
+        layout.addWidget(title)
+
+        logo = QLabel()
+        logo.setPixmap(QPixmap(os.path.join("images", "ma-icon-128.png")))
+        layout.addWidget(logo)
+
+        layout.addWidget(QLabel("Version 23.35.211.233232"))
+        layout.addWidget(QLabel("Copyright 2015 MooseAche Inc."))
+
+        for i in range(0, layout.count()):
+            layout.itemAt(i).setAlignment(Qt.AlignmentFlag.AlignHCenter)
+
+        layout.addWidget(self.buttonBox)
+
+        self.setLayout(layout)
+
+
+class WebEnginePage(QWebEnginePage):
+    # Store externally created windows.
+    external_windows = []
+
+    def acceptNavigationRequest(self, url, _type, isMainFrame):
+        print(url, _type, isMainFrame)
+        if _type == QWebEnginePage.NavigationType.NavigationTypeLinkClicked:
+            w = QWebEngineView()
+            w.setUrl(url)
+            w.show()
+
+            # Keep reference to external window, so it isn't cleared up.
+            self.external_windows.append(w)
+            return False
+        return super().acceptNavigationRequest(url, _type, isMainFrame)
+
+
+class MainWindow(QMainWindow):
+    def __init__(self):
+        super().__init__()
+
+        self.browser = QWebEngineView()
+        self.browser.setPage(WebEnginePage(self))
+        self.browser.setUrl(QUrl("http://google.com"))
+
+        self.browser.urlChanged.connect(self.update_urlbar)
+        self.browser.loadFinished.connect(self.update_title)
+        self.setCentralWidget(self.browser)
+
+        self.status = QStatusBar()
+        self.setStatusBar(self.status)
+
+        navtb = QToolBar("Navigation")
+        navtb.setIconSize(QSize(16, 16))
+        self.addToolBar(navtb)
+
+        back_btn = QAction(QIcon(os.path.join("images", "arrow-180.png")), "Back", self)
+        back_btn.setStatusTip("Back to previous page")
+        back_btn.triggered.connect(self.browser.back)
+        navtb.addAction(back_btn)
+
+        next_btn = QAction(
+            QIcon(os.path.join("images", "arrow-000.png")),
+            "Forward",
+            self,
+        )
+        next_btn.setStatusTip("Forward to next page")
+        next_btn.triggered.connect(self.browser.forward)
+        navtb.addAction(next_btn)
+
+        reload_btn = QAction(
+            QIcon(os.path.join("images", "arrow-circle-315.png")),
+            "Reload",
+            self,
+        )
+        reload_btn.setStatusTip("Reload page")
+        reload_btn.triggered.connect(self.browser.reload)
+        navtb.addAction(reload_btn)
+
+        home_btn = QAction(QIcon(os.path.join("images", "home.png")), "Home", self)
+        home_btn.setStatusTip("Go home")
+        home_btn.triggered.connect(self.navigate_home)
+        navtb.addAction(home_btn)
+
+        navtb.addSeparator()
+
+        self.httpsicon = QLabel()  # Yes, really!
+        self.httpsicon.setPixmap(QPixmap(os.path.join("images", "lock-nossl.png")))
+        navtb.addWidget(self.httpsicon)
+
+        self.urlbar = QLineEdit()
+        self.urlbar.returnPressed.connect(self.navigate_to_url)
+        navtb.addWidget(self.urlbar)
+
+        stop_btn = QAction(
+            QIcon(os.path.join("images", "cross-circle.png")),
+            "Stop",
+            self,
+        )
+        stop_btn.setStatusTip("Stop loading current page")
+        stop_btn.triggered.connect(self.browser.stop)
+        navtb.addAction(stop_btn)
+
+        # Uncomment to disable native menubar on Mac
+        # self.menuBar().setNativeMenuBar(False)
+
+        file_menu = self.menuBar().addMenu("&File")
+
+        open_file_action = QAction(
+            QIcon(os.path.join("images", "disk--arrow.png")),
+            "Open file...",
+            self,
+        )
+        open_file_action.setStatusTip("Open from file")
+        open_file_action.triggered.connect(self.open_file)
+        file_menu.addAction(open_file_action)
+
+        save_file_action = QAction(
+            QIcon(os.path.join("images", "disk--pencil.png")),
+            "Save Page As...",
+            self,
+        )
+        save_file_action.setStatusTip("Save current page to file")
+        save_file_action.triggered.connect(self.save_file)
+        file_menu.addAction(save_file_action)
+
+        print_action = QAction(
+            QIcon(os.path.join("images", "printer.png")),
+            "Print...",
+            self,
+        )
+        print_action.setStatusTip("Print current page")
+        print_action.triggered.connect(self.print_page)
+        file_menu.addAction(print_action)
+
+        help_menu = self.menuBar().addMenu("&Help")
+
+        about_action = QAction(
+            QIcon(os.path.join("images", "question.png")),
+            "About MooseAche",
+            self,
+        )
+        about_action.setStatusTip("Find out more about MooseAche")  # Hungry!
+        about_action.triggered.connect(self.about)
+        help_menu.addAction(about_action)
+
+        navigate_mozarella_action = QAction(
+            QIcon(os.path.join("images", "lifebuoy.png")),
+            "MooseAche Homepage",
+            self,
+        )
+        navigate_mozarella_action.setStatusTip("Go to MooseAche Homepage")
+        navigate_mozarella_action.triggered.connect(self.navigate_mozarella)
+        help_menu.addAction(navigate_mozarella_action)
+
+        self.show()
+
+        self.setWindowIcon(QIcon(os.path.join("images", "ma-icon-64.png")))
+
+    def acceptNavigationRequest(self, url, navigation_type, is_main_frame):
+        self._externalview = QWebEngineView(url)
+        return False
+
+    def linkClicked(self, e):
+        print(e)
+
+    def update_title(self):
+        title = self.browser.page().title()
+        self.setWindowTitle("%s - MooseAche" % title)
+
+    def navigate_mozarella(self):
+        self.browser.setUrl(QUrl("https://www.pythonguis.com/"))
+
+    def about(self):
+        dlg = AboutDialog()
+        dlg.exec()
+
+    def open_file(self):
+        filename, _ = QFileDialog.getOpenFileName(
+            self,
+            "Open file",
+            "",
+            "Hypertext Markup Language (*.htm *.html);;" "All files (*.*)",
+        )
+
+        if filename:
+            with open(filename, "r") as f:
+                html = f.read()
+
+            self.browser.setHtml(html)
+            self.urlbar.setText(filename)
+
+    def save_file(self):
+        filename, _ = QFileDialog.getSaveFileName(
+            self,
+            "Save Page As",
+            "",
+            "Hypertext Markup Language (*.htm *html);;" "All files (*.*)",
+        )
+
+        if filename:
+            html = self.browser.page().toHtml()
+            with open(filename, "w") as f:
+                f.write(html)
+
+    def print_page(self):
+        dlg = QPrintPreviewDialog()
+        dlg.paintRequested.connect(self.browser.print_)
+        dlg.exec()
+
+    def navigate_home(self):
+        self.browser.setUrl(QUrl("http://www.google.com"))
+
+    def navigate_to_url(self):  # Does not receive the Url
+        q = QUrl(self.urlbar.text())
+        if q.scheme() == "":
+            q.setScheme("http")
+
+        self.browser.setUrl(q)
+
+    def update_urlbar(self, q):
+        if q.scheme() == "https":
+            # Secure padlock icon
+            self.httpsicon.setPixmap(QPixmap(os.path.join("images", "lock-ssl.png")))
+
+        else:
+            # Insecure padlock icon
+            self.httpsicon.setPixmap(QPixmap(os.path.join("images", "lock-nossl.png")))
+
+        self.urlbar.setText(q.toString())
+        self.urlbar.setCursorPosition(0)
+
+
+if __name__ == "__main__":
+    app = QApplication(sys.argv)
+    app.setApplicationName("MooseAche")
+    app.setOrganizationName("MooseAche")
+    app.setOrganizationDomain("MooseAche.org")
+
+    window = MainWindow()
+
+    app.exec()

pyqt6/demos/browser/main_one_new_window.py

@@ -0,0 +1,277 @@
+import os
+import sys
+
+from PyQt6.QtCore import QSize, Qt, QUrl
+from PyQt6.QtGui import QAction, QIcon, QPixmap
+from PyQt6.QtPrintSupport import QPrintPreviewDialog
+from PyQt6.QtWebEngineCore import QWebEnginePage
+from PyQt6.QtWebEngineWidgets import QWebEngineView
+from PyQt6.QtWidgets import (
+    QApplication,
+    QDialog,
+    QDialogButtonBox,
+    QFileDialog,
+    QLabel,
+    QLineEdit,
+    QMainWindow,
+    QStatusBar,
+    QToolBar,
+    QVBoxLayout,
+)
+
+
+class AboutDialog(QDialog):
+    def __init__(self):
+        super().__init__()
+
+        QBtn = QDialogButtonBox.StandardButton.Ok  # No cancel
+        self.buttonBox = QDialogButtonBox(QBtn)
+        self.buttonBox.accepted.connect(self.accept)
+        self.buttonBox.rejected.connect(self.reject)
+
+        layout = QVBoxLayout()
+
+        title = QLabel("MooseAche")
+        font = title.font()
+        font.setPointSize(20)
+        title.setFont(font)
+
+        layout.addWidget(title)
+
+        logo = QLabel()
+        logo.setPixmap(QPixmap(os.path.join("images", "ma-icon-128.png")))
+        layout.addWidget(logo)
+
+        layout.addWidget(QLabel("Version 23.35.211.233232"))
+        layout.addWidget(QLabel("Copyright 2015 MooseAche Inc."))
+
+        for i in range(0, layout.count()):
+            layout.itemAt(i).setAlignment(Qt.AlignmentFlag.AlignHCenter)
+
+        layout.addWidget(self.buttonBox)
+
+        self.setLayout(layout)
+
+
+class WebEnginePage(QWebEnginePage):
+    # Store externally created window.
+    external_window = None
+
+    def acceptNavigationRequest(self, url, _type, isMainFrame):
+        print(url, _type, isMainFrame)
+        if _type == QWebEnginePage.NavigationType.NavigationTypeLinkClicked:
+            if not self.external_window:
+                self.external_window = QWebEngineView()
+
+            self.external_window.setUrl(url)
+            self.external_window.show()
+            return False
+
+        return super().acceptNavigationRequest(url, _type, isMainFrame)
+
+
+class MainWindow(QMainWindow):
+    def __init__(self):
+        super().__init__()
+
+        self.browser = QWebEngineView()
+        self.browser.setPage(WebEnginePage(self))
+        self.browser.setUrl(QUrl("http://google.com"))
+
+        self.browser.urlChanged.connect(self.update_urlbar)
+        self.browser.loadFinished.connect(self.update_title)
+        self.setCentralWidget(self.browser)
+
+        self.status = QStatusBar()
+        self.setStatusBar(self.status)
+
+        navtb = QToolBar("Navigation")
+        navtb.setIconSize(QSize(16, 16))
+        self.addToolBar(navtb)
+
+        back_btn = QAction(QIcon(os.path.join("images", "arrow-180.png")), "Back", self)
+        back_btn.setStatusTip("Back to previous page")
+        back_btn.triggered.connect(self.browser.back)
+        navtb.addAction(back_btn)
+
+        next_btn = QAction(
+            QIcon(os.path.join("images", "arrow-000.png")),
+            "Forward",
+            self,
+        )
+        next_btn.setStatusTip("Forward to next page")
+        next_btn.triggered.connect(self.browser.forward)
+        navtb.addAction(next_btn)
+
+        reload_btn = QAction(
+            QIcon(os.path.join("images", "arrow-circle-315.png")),
+            "Reload",
+            self,
+        )
+        reload_btn.setStatusTip("Reload page")
+        reload_btn.triggered.connect(self.browser.reload)
+        navtb.addAction(reload_btn)
+
+        home_btn = QAction(QIcon(os.path.join("images", "home.png")), "Home", self)
+        home_btn.setStatusTip("Go home")
+        home_btn.triggered.connect(self.navigate_home)
+        navtb.addAction(home_btn)
+
+        navtb.addSeparator()
+
+        self.httpsicon = QLabel()  # Yes, really!
+        self.httpsicon.setPixmap(QPixmap(os.path.join("images", "lock-nossl.png")))
+        navtb.addWidget(self.httpsicon)
+
+        self.urlbar = QLineEdit()
+        self.urlbar.returnPressed.connect(self.navigate_to_url)
+        navtb.addWidget(self.urlbar)
+
+        stop_btn = QAction(
+            QIcon(os.path.join("images", "cross-circle.png")),
+            "Stop",
+            self,
+        )
+        stop_btn.setStatusTip("Stop loading current page")
+        stop_btn.triggered.connect(self.browser.stop)
+        navtb.addAction(stop_btn)
+
+        # Uncomment to disable native menubar on Mac
+        # self.menuBar().setNativeMenuBar(False)
+
+        file_menu = self.menuBar().addMenu("&File")
+
+        open_file_action = QAction(
+            QIcon(os.path.join("images", "disk--arrow.png")),
+            "Open file...",
+            self,
+        )
+        open_file_action.setStatusTip("Open from file")
+        open_file_action.triggered.connect(self.open_file)
+        file_menu.addAction(open_file_action)
+
+        save_file_action = QAction(
+            QIcon(os.path.join("images", "disk--pencil.png")),
+            "Save Page As...",
+            self,
+        )
+        save_file_action.setStatusTip("Save current page to file")
+        save_file_action.triggered.connect(self.save_file)
+        file_menu.addAction(save_file_action)
+
+        print_action = QAction(
+            QIcon(os.path.join("images", "printer.png")),
+            "Print...",
+            self,
+        )
+        print_action.setStatusTip("Print current page")
+        print_action.triggered.connect(self.print_page)
+        file_menu.addAction(print_action)
+
+        help_menu = self.menuBar().addMenu("&Help")
+
+        about_action = QAction(
+            QIcon(os.path.join("images", "question.png")),
+            "About MooseAche",
+            self,
+        )
+        about_action.setStatusTip("Find out more about MooseAche")  # Hungry!
+        about_action.triggered.connect(self.about)
+        help_menu.addAction(about_action)
+
+        navigate_mozarella_action = QAction(
+            QIcon(os.path.join("images", "lifebuoy.png")),
+            "MooseAche Homepage",
+            self,
+        )
+        navigate_mozarella_action.setStatusTip("Go to MooseAche Homepage")
+        navigate_mozarella_action.triggered.connect(self.navigate_mozarella)
+        help_menu.addAction(navigate_mozarella_action)
+
+        self.show()
+
+        self.setWindowIcon(QIcon(os.path.join("images", "ma-icon-64.png")))
+
+    def acceptNavigationRequest(self, url, navigation_type, is_main_frame):
+        self._externalview = QWebEngineView(url)
+        return False
+
+    def linkClicked(self, e):
+        print(e)
+
+    def update_title(self):
+        title = self.browser.page().title()
+        self.setWindowTitle("%s - MooseAche" % title)
+
+    def navigate_mozarella(self):
+        self.browser.setUrl(QUrl("https://www.pythonguis.com/"))
+
+    def about(self):
+        dlg = AboutDialog()
+        dlg.exec()
+
+    def open_file(self):
+        filename, _ = QFileDialog.getOpenFileName(
+            self,
+            "Open file",
+            "",
+            "Hypertext Markup Language (*.htm *.html);;" "All files (*.*)",
+        )
+
+        if filename:
+            with open(filename, "r") as f:
+                html = f.read()
+
+            self.browser.setHtml(html)
+            self.urlbar.setText(filename)
+
+    def save_file(self):
+        filename, _ = QFileDialog.getSaveFileName(
+            self,
+            "Save Page As",
+            "",
+            "Hypertext Markup Language (*.htm *html);;" "All files (*.*)",
+        )
+
+        if filename:
+            html = self.browser.page().toHtml()
+            with open(filename, "w") as f:
+                f.write(html)
+
+    def print_page(self):
+        dlg = QPrintPreviewDialog()
+        dlg.paintRequested.connect(self.browser.print_)
+        dlg.exec()
+
+    def navigate_home(self):
+        self.browser.setUrl(QUrl("http://www.google.com"))
+
+    def navigate_to_url(self):  # Does not receive the Url
+        q = QUrl(self.urlbar.text())
+        if q.scheme() == "":
+            q.setScheme("http")
+
+        self.browser.setUrl(q)
+
+    def update_urlbar(self, q):
+        if q.scheme() == "https":
+            # Secure padlock icon
+            self.httpsicon.setPixmap(QPixmap(os.path.join("images", "lock-ssl.png")))
+
+        else:
+            # Insecure padlock icon
+            self.httpsicon.setPixmap(QPixmap(os.path.join("images", "lock-nossl.png")))
+
+        self.urlbar.setText(q.toString())
+        self.urlbar.setCursorPosition(0)
+
+
+if __name__ == "__main__":
+    app = QApplication(sys.argv)
+    app.setApplicationName("MooseAche")
+    app.setOrganizationName("MooseAche")
+    app.setOrganizationDomain("MooseAche.org")
+
+    window = MainWindow()
+
+    app.exec()

pyqt6/demos/browser/requirements.txt

@@ -0,0 +1,2 @@
+PyQt5>=5.6
+PyQtWebEngine

pyqt6/demos/browser_tabbed/README.md

@@ -0,0 +1,28 @@
+# Mozzarella Ashbadger — Upgrade your browsing with tabs
+
+Mozarella Ashbadger is the latest revolution in web
+browsing! Go back and forward! Print! Save files! Get help!
+(you’ll need it). Any similarity to other browsers is entirely
+coincidental.
+
+![Browser tabbed](screenshot-browser-tabbed.jpg)
+
+> If you want to learn more about build GUI applications with Python,
+take a look at my [PyQt5 tutorials](https://www.pythonguis.com)
+which covers everything you need to know to start building your own applications with PyQt5.
+
+## Code notes
+
+### Tabbing
+
+Adding tab support complicates the internals of the browser a bit, since we
+now need to keep track of the currently active browser view, both to update
+UI elements (URL bar, HTTPs icon) to changing state in the currently active
+window, and to ensure the UI events are dispatched to the correct web view.
+
+This is achieved by using intermediate slots which filter events, and by
+adding signal redirection (using lamba functions to keep it short).
+
+## Other licenses
+
+Icons used in the application are by [Yusuke Kamiyaman](http://p.yusukekamiyamane.com/).

pyqt6/demos/browser_tabbed/main.py

@@ -0,0 +1,326 @@
+import os
+import sys
+
+from PyQt6.QtCore import QSize, Qt, QUrl
+from PyQt6.QtGui import QAction, QIcon, QKeySequence, QPixmap, QShortcut
+from PyQt6.QtPrintSupport import QPrintPreviewDialog
+from PyQt6.QtWebEngineWidgets import QWebEngineView
+from PyQt6.QtWidgets import (
+    QApplication,
+    QDialog,
+    QDialogButtonBox,
+    QFileDialog,
+    QLabel,
+    QLineEdit,
+    QMainWindow,
+    QStatusBar,
+    QTabWidget,
+    QToolBar,
+    QVBoxLayout,
+)
+
+
+class AboutDialog(QDialog):
+    def __init__(self):
+        super().__init__()
+
+        QBtn = QDialogButtonBox.StandardButton.Ok  # No cancel
+        self.buttonBox = QDialogButtonBox(QBtn)
+        self.buttonBox.accepted.connect(self.accept)
+        self.buttonBox.rejected.connect(self.reject)
+
+        layout = QVBoxLayout()
+
+        title = QLabel("Mozarella Ashbadger")
+        font = title.font()
+        font.setPointSize(20)
+        title.setFont(font)
+
+        layout.addWidget(title)
+
+        logo = QLabel()
+        logo.setPixmap(QPixmap(os.path.join("images", "ma-icon-128.png")))
+        layout.addWidget(logo)
+
+        layout.addWidget(QLabel("Version 23.35.211.233232"))
+        layout.addWidget(QLabel("Copyright 2015 Mozarella Inc."))
+
+        for i in range(0, layout.count()):
+            layout.itemAt(i).setAlignment(Qt.AlignmentFlag.AlignHCenter)
+
+        layout.addWidget(self.buttonBox)
+
+        self.setLayout(layout)
+
+
+class MainWindow(QMainWindow):
+    def __init__(self):
+        super().__init__()
+
+        self.tabs = QTabWidget()
+        self.tabs.setDocumentMode(True)
+        self.tabs.tabBarDoubleClicked.connect(self.tab_open_doubleclick)
+        self.tabs.currentChanged.connect(self.current_tab_changed)
+        self.tabs.setTabsClosable(True)
+        self.tabs.tabCloseRequested.connect(self.close_current_tab)
+
+        self.setCentralWidget(self.tabs)
+
+        self.status = QStatusBar()
+        self.setStatusBar(self.status)
+
+        navtb = QToolBar("Navigation")
+        navtb.setIconSize(QSize(16, 16))
+        self.addToolBar(navtb)
+
+        """Shortcuts"""
+
+        self.shortcut_open = QShortcut(QKeySequence("F5"), self)
+        self.shortcut_open.activated.connect(lambda: self.tabs.currentWidget().reload())
+
+        back_btn = QAction(QIcon(os.path.join("images", "arrow-180.png")), "Back", self)
+        back_btn.setStatusTip("Back to previous page")
+        back_btn.triggered.connect(lambda: self.tabs.currentWidget().back())
+        navtb.addAction(back_btn)
+
+        next_btn = QAction(
+            QIcon(os.path.join("images", "arrow-000.png")),
+            "Forward",
+            self,
+        )
+        next_btn.setStatusTip("Forward to next page")
+        next_btn.triggered.connect(lambda: self.tabs.currentWidget().forward())
+        navtb.addAction(next_btn)
+
+        reload_btn = QAction(
+            QIcon(os.path.join("images", "arrow-circle-315.png")),
+            "Reload",
+            self,
+        )
+        reload_btn.setStatusTip("Reload page")
+        reload_btn.triggered.connect(lambda: self.tabs.currentWidget().reload())
+        navtb.addAction(reload_btn)
+
+        home_btn = QAction(QIcon(os.path.join("images", "home.png")), "Home", self)
+        home_btn.setStatusTip("Go home")
+        home_btn.triggered.connect(self.navigate_home)
+        navtb.addAction(home_btn)
+
+        navtb.addSeparator()
+
+        self.httpsicon = QLabel()  # Yes, really!
+        self.httpsicon.setPixmap(QPixmap(os.path.join("images", "lock-nossl.png")))
+        navtb.addWidget(self.httpsicon)
+
+        self.urlbar = QLineEdit()
+        self.urlbar.returnPressed.connect(self.navigate_to_url)
+        navtb.addWidget(self.urlbar)
+
+        stop_btn = QAction(
+            QIcon(os.path.join("images", "cross-circle.png")),
+            "Stop",
+            self,
+        )
+        stop_btn.setStatusTip("Stop loading current page")
+        stop_btn.triggered.connect(lambda: self.tabs.currentWidget().stop())
+        navtb.addAction(stop_btn)
+
+        # Uncomment to disable native menubar on Mac
+        # self.menuBar().setNativeMenuBar(False)
+
+        file_menu = self.menuBar().addMenu("&File")
+
+        new_tab_action = QAction(
+            QIcon(os.path.join("images", "ui-tab--plus.png")),
+            "New Tab",
+            self,
+        )
+        new_tab_action.setStatusTip("Open a new tab")
+        new_tab_action.triggered.connect(lambda _: self.add_new_tab())
+        file_menu.addAction(new_tab_action)
+
+        open_file_action = QAction(
+            QIcon(os.path.join("images", "disk--arrow.png")),
+            "Open file...",
+            self,
+        )
+        open_file_action.setStatusTip("Open from file")
+        open_file_action.triggered.connect(self.open_file)
+        file_menu.addAction(open_file_action)
+
+        save_file_action = QAction(
+            QIcon(os.path.join("images", "disk--pencil.png")),
+            "Save Page As...",
+            self,
+        )
+        save_file_action.setStatusTip("Save current page to file")
+        save_file_action.triggered.connect(self.save_file)
+        file_menu.addAction(save_file_action)
+
+        print_action = QAction(
+            QIcon(os.path.join("images", "printer.png")),
+            "Print...",
+            self,
+        )
+        print_action.setStatusTip("Print current page")
+        print_action.triggered.connect(self.print_page)
+        file_menu.addAction(print_action)
+
+        help_menu = self.menuBar().addMenu("&Help")
+
+        about_action = QAction(
+            QIcon(os.path.join("images", "question.png")),
+            "About Mozarella Ashbadger",
+            self,
+        )
+        about_action.setStatusTip("Find out more about Mozarella Ashbadger")  # Hungry!
+        about_action.triggered.connect(self.about)
+        help_menu.addAction(about_action)
+
+        navigate_mozarella_action = QAction(
+            QIcon(os.path.join("images", "lifebuoy.png")),
+            "Mozarella Ashbadger Homepage",
+            self,
+        )
+        navigate_mozarella_action.setStatusTip("Go to Mozarella Ashbadger Homepage")
+        navigate_mozarella_action.triggered.connect(self.navigate_mozarella)
+        help_menu.addAction(navigate_mozarella_action)
+
+        self.add_new_tab(QUrl("http://www.google.com"), "Homepage")
+        self.add_new_tab(QUrl("http://www.pythonguis.com"), "PythonGUIs")
+
+        self.show()
+
+        self.setWindowTitle("Mozarella Ashbadger")
+        self.setWindowIcon(QIcon(os.path.join("images", "ma-icon-64.png")))
+
+    def add_new_tab(self, qurl=None, label="Blank"):
+        if qurl is None:
+            qurl = QUrl("")
+
+        browser = QWebEngineView()
+        browser.setUrl(qurl)
+        i = self.tabs.addTab(browser, label)
+
+        self.tabs.setCurrentIndex(i)
+
+        # More difficult! We only want to update the url when it's from the
+        # correct tab
+        browser.urlChanged.connect(
+            lambda qurl, browser=browser: self.update_urlbar(qurl, browser)
+        )
+        browser.titleChanged.connect(
+            lambda _, i=i, browser=browser: self.tabs.setTabText(
+                i, browser.page().title()
+            )
+        )
+        browser.titleChanged.connect(
+            lambda _, i=i, browser=browser: self.tabs.setTabToolTip(
+                i, browser.page().title()
+            )
+        )
+        browser.loadFinished.connect(
+            lambda _, i=i, browser=browser: self.tabs.setTabText(
+                i, browser.page().title()
+            )
+        )
+
+    def tab_open_doubleclick(self, i):
+        if i == -1:  # No tab under the click
+            self.add_new_tab()
+
+    def current_tab_changed(self, i):
+        qurl = self.tabs.currentWidget().url()
+        self.update_urlbar(qurl, self.tabs.currentWidget())
+        self.update_title(self.tabs.currentWidget())
+
+    def close_current_tab(self, i):
+        if self.tabs.count() < 2:
+            return
+
+        self.tabs.removeTab(i)
+
+    def update_title(self, browser):
+        if browser != self.tabs.currentWidget():
+            # If this signal is not from the current tab, ignore
+            return
+
+        title = self.tabs.currentWidget().page().title()
+        self.setWindowTitle("%s - Mozarella Ashbadger" % title)
+
+    def navigate_mozarella(self):
+        self.tabs.currentWidget().setUrl(QUrl("https://www.pythonguis.com/"))
+
+    def about(self):
+        dlg = AboutDialog()
+        dlg.exec()
+
+    def open_file(self):
+        filename, _ = QFileDialog.getOpenFileName(
+            self,
+            "Open file",
+            "",
+            "Hypertext Markup Language (*.htm *.html);;" "All files (*.*)",
+        )
+
+        if filename:
+            with open(filename, "r") as f:
+                html = f.read()
+
+            self.tabs.currentWidget().setHtml(html)
+            self.urlbar.setText(filename)
+
+    def save_file(self):
+        filename, _ = QFileDialog.getSaveFileName(
+            self,
+            "Save Page As",
+            "",
+            "Hypertext Markup Language (*.htm *html);;" "All files (*.*)",
+        )
+
+        if filename:
+            html = self.tabs.currentWidget().page().toHtml()
+            with open(filename, "w") as f:
+                f.write(html.encode("utf8"))
+
+    def print_page(self):
+        dlg = QPrintPreviewDialog()
+        dlg.paintRequested.connect(self.browser.print_)
+        dlg.exec()
+
+    def navigate_home(self):
+        self.tabs.currentWidget().setUrl(QUrl("http://www.google.com"))
+
+    def navigate_to_url(self):  # Does not receive the Url
+        q = QUrl(self.urlbar.text())
+        if q.scheme() == "":
+            q.setScheme("http")
+
+        self.tabs.currentWidget().setUrl(q)
+
+    def update_urlbar(self, q, browser=None):
+        if browser != self.tabs.currentWidget():
+            # If this signal is not from the current tab, ignore
+            return
+
+        if q.scheme() == "https":
+            # Secure padlock icon
+            self.httpsicon.setPixmap(QPixmap(os.path.join("images", "lock-ssl.png")))
+
+        else:
+            # Insecure padlock icon
+            self.httpsicon.setPixmap(QPixmap(os.path.join("images", "lock-nossl.png")))
+
+        self.urlbar.setText(q.toString())
+        self.urlbar.setCursorPosition(0)
+
+
+if __name__ == "__main__":
+    app = QApplication(sys.argv)
+    app.setApplicationName("Mozarella Ashbadger")
+    app.setOrganizationName("Mozarella")
+    app.setOrganizationDomain("mozarella.org")
+
+    window = MainWindow()
+
+    app.exec()

pyqt6/demos/browser_tabbed/requirements.txt

@@ -0,0 +1,2 @@
+PyQt5>=5.6
+PyQtWebEngine

pyqt6/demos/calculator/MainWindow.py

@@ -0,0 +1,314 @@
+# Form implementation generated from reading ui file 'mainwindow.ui'
+#
+# Created by: PyQt6 UI code generator 6.4.2
+#
+# WARNING: Any manual changes made to this file will be lost when pyuic6 is
+# run again.  Do not edit this file unless you know what you are doing.
+
+
+from PyQt6 import QtCore, QtGui, QtWidgets
+
+
+class Ui_MainWindow(object):
+    def setupUi(self, MainWindow):
+        MainWindow.setObjectName("MainWindow")
+        MainWindow.resize(484, 433)
+        self.centralWidget = QtWidgets.QWidget(parent=MainWindow)
+        sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Policy.Maximum, QtWidgets.QSizePolicy.Policy.Maximum)
+        sizePolicy.setHorizontalStretch(0)
+        sizePolicy.setVerticalStretch(0)
+        sizePolicy.setHeightForWidth(self.centralWidget.sizePolicy().hasHeightForWidth())
+        self.centralWidget.setSizePolicy(sizePolicy)
+        self.centralWidget.setObjectName("centralWidget")
+        self.verticalLayout = QtWidgets.QVBoxLayout(self.centralWidget)
+        self.verticalLayout.setContentsMargins(11, 11, 11, 11)
+        self.verticalLayout.setSpacing(6)
+        self.verticalLayout.setObjectName("verticalLayout")
+        self.lcdNumber = QtWidgets.QLCDNumber(parent=self.centralWidget)
+        self.lcdNumber.setDigitCount(10)
+        self.lcdNumber.setObjectName("lcdNumber")
+        self.verticalLayout.addWidget(self.lcdNumber)
+        self.gridLayout = QtWidgets.QGridLayout()
+        self.gridLayout.setSpacing(6)
+        self.gridLayout.setObjectName("gridLayout")
+        self.pushButton_n4 = QtWidgets.QPushButton(parent=self.centralWidget)
+        self.pushButton_n4.setMinimumSize(QtCore.QSize(0, 50))
+        font = QtGui.QFont()
+        font.setPointSize(27)
+        font.setBold(True)
+        font.setWeight(75)
+        self.pushButton_n4.setFont(font)
+        self.pushButton_n4.setStyleSheet("QPushButton {\n"
+"color: #1976D2;\n"
+"}")
+        self.pushButton_n4.setObjectName("pushButton_n4")
+        self.gridLayout.addWidget(self.pushButton_n4, 3, 0, 1, 1)
+        self.pushButton_n1 = QtWidgets.QPushButton(parent=self.centralWidget)
+        self.pushButton_n1.setMinimumSize(QtCore.QSize(0, 50))
+        font = QtGui.QFont()
+        font.setPointSize(27)
+        font.setBold(True)
+        font.setWeight(75)
+        self.pushButton_n1.setFont(font)
+        self.pushButton_n1.setStyleSheet("QPushButton {\n"
+"color: #1976D2;\n"
+"}")
+        self.pushButton_n1.setObjectName("pushButton_n1")
+        self.gridLayout.addWidget(self.pushButton_n1, 4, 0, 1, 1)
+        self.pushButton_n8 = QtWidgets.QPushButton(parent=self.centralWidget)
+        self.pushButton_n8.setMinimumSize(QtCore.QSize(0, 50))
+        font = QtGui.QFont()
+        font.setPointSize(27)
+        font.setBold(True)
+        font.setWeight(75)
+        self.pushButton_n8.setFont(font)
+        self.pushButton_n8.setStyleSheet("QPushButton {\n"
+"color: #1976D2;\n"
+"}")
+        self.pushButton_n8.setObjectName("pushButton_n8")
+        self.gridLayout.addWidget(self.pushButton_n8, 2, 1, 1, 1)
+        self.pushButton_mul = QtWidgets.QPushButton(parent=self.centralWidget)
+        self.pushButton_mul.setMinimumSize(QtCore.QSize(0, 50))
+        font = QtGui.QFont()
+        font.setPointSize(27)
+        font.setBold(False)
+        font.setWeight(50)
+        self.pushButton_mul.setFont(font)
+        self.pushButton_mul.setObjectName("pushButton_mul")
+        self.gridLayout.addWidget(self.pushButton_mul, 2, 3, 1, 1)
+        self.pushButton_n7 = QtWidgets.QPushButton(parent=self.centralWidget)
+        self.pushButton_n7.setMinimumSize(QtCore.QSize(0, 50))
+        font = QtGui.QFont()
+        font.setPointSize(27)
+        font.setBold(True)
+        font.setWeight(75)
+        self.pushButton_n7.setFont(font)
+        self.pushButton_n7.setStyleSheet("QPushButton {\n"
+"color: #1976D2;\n"
+"}")
+        self.pushButton_n7.setObjectName("pushButton_n7")
+        self.gridLayout.addWidget(self.pushButton_n7, 2, 0, 1, 1)
+        self.pushButton_n6 = QtWidgets.QPushButton(parent=self.centralWidget)
+        self.pushButton_n6.setMinimumSize(QtCore.QSize(0, 50))
+        font = QtGui.QFont()
+        font.setPointSize(27)
+        font.setBold(True)
+        font.setWeight(75)
+        self.pushButton_n6.setFont(font)
+        self.pushButton_n6.setStyleSheet("QPushButton {\n"
+"color: #1976D2;\n"
+"}")
+        self.pushButton_n6.setObjectName("pushButton_n6")
+        self.gridLayout.addWidget(self.pushButton_n6, 3, 2, 1, 1)
+        self.pushButton_n5 = QtWidgets.QPushButton(parent=self.centralWidget)
+        self.pushButton_n5.setMinimumSize(QtCore.QSize(0, 50))
+        font = QtGui.QFont()
+        font.setPointSize(27)
+        font.setBold(True)
+        font.setWeight(75)
+        self.pushButton_n5.setFont(font)
+        self.pushButton_n5.setStyleSheet("QPushButton {\n"
+"color: #1976D2;\n"
+"}")
+        self.pushButton_n5.setObjectName("pushButton_n5")
+        self.gridLayout.addWidget(self.pushButton_n5, 3, 1, 1, 1)
+        self.pushButton_n0 = QtWidgets.QPushButton(parent=self.centralWidget)
+        self.pushButton_n0.setMinimumSize(QtCore.QSize(0, 50))
+        font = QtGui.QFont()
+        font.setPointSize(27)
+        font.setBold(True)
+        font.setWeight(75)
+        self.pushButton_n0.setFont(font)
+        self.pushButton_n0.setStyleSheet("QPushButton {\n"
+"color: #1976D2;\n"
+"}")
+        self.pushButton_n0.setObjectName("pushButton_n0")
+        self.gridLayout.addWidget(self.pushButton_n0, 5, 0, 1, 1)
+        self.pushButton_n2 = QtWidgets.QPushButton(parent=self.centralWidget)
+        self.pushButton_n2.setMinimumSize(QtCore.QSize(0, 50))
+        font = QtGui.QFont()
+        font.setPointSize(27)
+        font.setBold(True)
+        font.setWeight(75)
+        self.pushButton_n2.setFont(font)
+        self.pushButton_n2.setStyleSheet("QPushButton {\n"
+"color: #1976D2;\n"
+"}")
+        self.pushButton_n2.setObjectName("pushButton_n2")
+        self.gridLayout.addWidget(self.pushButton_n2, 4, 1, 1, 1)
+        self.pushButton_n9 = QtWidgets.QPushButton(parent=self.centralWidget)
+        self.pushButton_n9.setMinimumSize(QtCore.QSize(0, 50))
+        font = QtGui.QFont()
+        font.setPointSize(27)
+        font.setBold(True)
+        font.setWeight(75)
+        self.pushButton_n9.setFont(font)
+        self.pushButton_n9.setStyleSheet("QPushButton {\n"
+"color: #1976D2;\n"
+"}")
+        self.pushButton_n9.setObjectName("pushButton_n9")
+        self.gridLayout.addWidget(self.pushButton_n9, 2, 2, 1, 1)
+        self.pushButton_n3 = QtWidgets.QPushButton(parent=self.centralWidget)
+        self.pushButton_n3.setMinimumSize(QtCore.QSize(0, 50))
+        font = QtGui.QFont()
+        font.setPointSize(27)
+        font.setBold(True)
+        font.setWeight(75)
+        self.pushButton_n3.setFont(font)
+        self.pushButton_n3.setStyleSheet("QPushButton {\n"
+"color: #1976D2;\n"
+"}")
+        self.pushButton_n3.setObjectName("pushButton_n3")
+        self.gridLayout.addWidget(self.pushButton_n3, 4, 2, 1, 1)
+        self.pushButton_div = QtWidgets.QPushButton(parent=self.centralWidget)
+        self.pushButton_div.setMinimumSize(QtCore.QSize(0, 50))
+        font = QtGui.QFont()
+        font.setPointSize(27)
+        font.setBold(False)
+        font.setWeight(50)
+        self.pushButton_div.setFont(font)
+        self.pushButton_div.setObjectName("pushButton_div")
+        self.gridLayout.addWidget(self.pushButton_div, 1, 3, 1, 1)
+        self.pushButton_sub = QtWidgets.QPushButton(parent=self.centralWidget)
+        self.pushButton_sub.setMinimumSize(QtCore.QSize(0, 50))
+        font = QtGui.QFont()
+        font.setPointSize(27)
+        font.setBold(False)
+        font.setWeight(50)
+        self.pushButton_sub.setFont(font)
+        self.pushButton_sub.setObjectName("pushButton_sub")
+        self.gridLayout.addWidget(self.pushButton_sub, 3, 3, 1, 1)
+        self.pushButton_add = QtWidgets.QPushButton(parent=self.centralWidget)
+        self.pushButton_add.setMinimumSize(QtCore.QSize(0, 50))
+        font = QtGui.QFont()
+        font.setPointSize(27)
+        font.setBold(False)
+        font.setWeight(50)
+        self.pushButton_add.setFont(font)
+        self.pushButton_add.setObjectName("pushButton_add")
+        self.gridLayout.addWidget(self.pushButton_add, 4, 3, 1, 1)
+        self.pushButton_ac = QtWidgets.QPushButton(parent=self.centralWidget)
+        self.pushButton_ac.setMinimumSize(QtCore.QSize(0, 50))
+        font = QtGui.QFont()
+        font.setPointSize(27)
+        font.setBold(False)
+        font.setWeight(50)
+        self.pushButton_ac.setFont(font)
+        self.pushButton_ac.setStyleSheet("QPushButton {\n"
+"    color: #f44336;\n"
+"}")
+        self.pushButton_ac.setObjectName("pushButton_ac")
+        self.gridLayout.addWidget(self.pushButton_ac, 1, 0, 1, 1)
+        self.pushButton_mr = QtWidgets.QPushButton(parent=self.centralWidget)
+        self.pushButton_mr.setMinimumSize(QtCore.QSize(0, 50))
+        font = QtGui.QFont()
+        font.setPointSize(27)
+        font.setBold(False)
+        font.setWeight(50)
+        self.pushButton_mr.setFont(font)
+        self.pushButton_mr.setStyleSheet("QPushButton {\n"
+"   color: #FFC107;\n"
+"}")
+        self.pushButton_mr.setObjectName("pushButton_mr")
+        self.gridLayout.addWidget(self.pushButton_mr, 1, 2, 1, 1)
+        self.pushButton_m = QtWidgets.QPushButton(parent=self.centralWidget)
+        self.pushButton_m.setMinimumSize(QtCore.QSize(0, 50))
+        font = QtGui.QFont()
+        font.setPointSize(27)
+        font.setBold(False)
+        font.setWeight(50)
+        self.pushButton_m.setFont(font)
+        self.pushButton_m.setStyleSheet("QPushButton {\n"
+"   color: #FFC107;\n"
+"}")
+        self.pushButton_m.setObjectName("pushButton_m")
+        self.gridLayout.addWidget(self.pushButton_m, 1, 1, 1, 1)
+        self.pushButton_pc = QtWidgets.QPushButton(parent=self.centralWidget)
+        self.pushButton_pc.setMinimumSize(QtCore.QSize(0, 50))
+        font = QtGui.QFont()
+        font.setPointSize(27)
+        font.setBold(False)
+        font.setWeight(50)
+        self.pushButton_pc.setFont(font)
+        self.pushButton_pc.setObjectName("pushButton_pc")
+        self.gridLayout.addWidget(self.pushButton_pc, 5, 1, 1, 1)
+        self.pushButton_eq = QtWidgets.QPushButton(parent=self.centralWidget)
+        self.pushButton_eq.setMinimumSize(QtCore.QSize(0, 50))
+        font = QtGui.QFont()
+        font.setPointSize(27)
+        font.setBold(True)
+        font.setWeight(75)
+        self.pushButton_eq.setFont(font)
+        self.pushButton_eq.setStyleSheet("QPushButton {\n"
+"color: #4CAF50;\n"
+"}")
+        self.pushButton_eq.setObjectName("pushButton_eq")
+        self.gridLayout.addWidget(self.pushButton_eq, 5, 2, 1, 2)
+        self.verticalLayout.addLayout(self.gridLayout)
+        MainWindow.setCentralWidget(self.centralWidget)
+        self.menuBar = QtWidgets.QMenuBar(parent=MainWindow)
+        self.menuBar.setGeometry(QtCore.QRect(0, 0, 484, 22))
+        self.menuBar.setObjectName("menuBar")
+        self.menuFile = QtWidgets.QMenu(parent=self.menuBar)
+        self.menuFile.setObjectName("menuFile")
+        MainWindow.setMenuBar(self.menuBar)
+        self.statusBar = QtWidgets.QStatusBar(parent=MainWindow)
+        self.statusBar.setObjectName("statusBar")
+        MainWindow.setStatusBar(self.statusBar)
+        self.actionExit = QtGui.QAction(parent=MainWindow)
+        self.actionExit.setObjectName("actionExit")
+        self.actionReset = QtGui.QAction(parent=MainWindow)
+        self.actionReset.setObjectName("actionReset")
+        self.menuFile.addAction(self.actionReset)
+        self.menuFile.addAction(self.actionExit)
+        self.menuBar.addAction(self.menuFile.menuAction())
+
+        self.retranslateUi(MainWindow)
+        QtCore.QMetaObject.connectSlotsByName(MainWindow)
+
+    def retranslateUi(self, MainWindow):
+        _translate = QtCore.QCoreApplication.translate
+        MainWindow.setWindowTitle(_translate("MainWindow", "Calculon"))
+        self.pushButton_n4.setText(_translate("MainWindow", "4"))
+        self.pushButton_n4.setShortcut(_translate("MainWindow", "4"))
+        self.pushButton_n1.setText(_translate("MainWindow", "1"))
+        self.pushButton_n1.setShortcut(_translate("MainWindow", "1"))
+        self.pushButton_n8.setText(_translate("MainWindow", "8"))
+        self.pushButton_n8.setShortcut(_translate("MainWindow", "8"))
+        self.pushButton_mul.setText(_translate("MainWindow", "x"))
+        self.pushButton_mul.setShortcut(_translate("MainWindow", "*"))
+        self.pushButton_n7.setText(_translate("MainWindow", "7"))
+        self.pushButton_n7.setShortcut(_translate("MainWindow", "7"))
+        self.pushButton_n6.setText(_translate("MainWindow", "6"))
+        self.pushButton_n6.setShortcut(_translate("MainWindow", "6"))
+        self.pushButton_n5.setText(_translate("MainWindow", "5"))
+        self.pushButton_n5.setShortcut(_translate("MainWindow", "5"))
+        self.pushButton_n0.setText(_translate("MainWindow", "0"))
+        self.pushButton_n0.setShortcut(_translate("MainWindow", "0"))
+        self.pushButton_n2.setText(_translate("MainWindow", "2"))
+        self.pushButton_n2.setShortcut(_translate("MainWindow", "2"))
+        self.pushButton_n9.setText(_translate("MainWindow", "9"))
+        self.pushButton_n9.setShortcut(_translate("MainWindow", "9"))
+        self.pushButton_n3.setText(_translate("MainWindow", "3"))
+        self.pushButton_n3.setShortcut(_translate("MainWindow", "3"))
+        self.pushButton_div.setText(_translate("MainWindow", "÷"))
+        self.pushButton_div.setShortcut(_translate("MainWindow", "/"))
+        self.pushButton_sub.setText(_translate("MainWindow", "-"))
+        self.pushButton_sub.setShortcut(_translate("MainWindow", "-"))
+        self.pushButton_add.setText(_translate("MainWindow", "+"))
+        self.pushButton_add.setShortcut(_translate("MainWindow", "+"))
+        self.pushButton_ac.setText(_translate("MainWindow", "AC"))
+        self.pushButton_ac.setShortcut(_translate("MainWindow", "Esc"))
+        self.pushButton_mr.setText(_translate("MainWindow", "MR"))
+        self.pushButton_mr.setShortcut(_translate("MainWindow", "R"))
+        self.pushButton_m.setText(_translate("MainWindow", "M"))
+        self.pushButton_m.setShortcut(_translate("MainWindow", "M"))
+        self.pushButton_pc.setText(_translate("MainWindow", "%"))
+        self.pushButton_pc.setShortcut(_translate("MainWindow", "%"))
+        self.pushButton_eq.setText(_translate("MainWindow", "="))
+        self.pushButton_eq.setShortcut(_translate("MainWindow", "Return"))
+        self.menuFile.setTitle(_translate("MainWindow", "File"))
+        self.actionExit.setText(_translate("MainWindow", "Exit"))
+        self.actionExit.setShortcut(_translate("MainWindow", "Ctrl+Q"))
+        self.actionReset.setText(_translate("MainWindow", "Reset"))
+        self.actionReset.setShortcut(_translate("MainWindow", "Ctrl+R"))

pyqt6/demos/calculator/README.md

@@ -0,0 +1,11 @@
+# Calculon - A desktop calculator in PyQt
+
+A simple calculator application implemented in Python using PyQt. The UI was designed in Qt Designer and the
+calculator operations are implemented using simple stack-based logic.
+
+![Calculon](screenshot-calculator.jpg)
+
+> If you think this example app is neat and want to learn more about
+PyQt5, [take a look at my ebook & online course
+"Create Simple GUI Applications"](https://martinfitzpatrick.name/create-simple-gui-applications)
+which covers everything you need to know to start building your own applications with PyQt5.

pyqt6/demos/calculator/main.py

@@ -0,0 +1,110 @@
+import operator
+import sys
+
+from MainWindow import Ui_MainWindow
+from PyQt6.QtWidgets import QApplication, QMainWindow
+
+# Calculator state.
+READY = 0
+INPUT = 1
+
+
+class MainWindow(QMainWindow, Ui_MainWindow):
+    def __init__(self):
+        super().__init__()
+        self.setupUi(self)
+
+        # Setup numbers.
+        for n in range(0, 10):
+            getattr(self, "pushButton_n%s" % n).pressed.connect(lambda v=n: self.input_number(v))
+
+        # Setup operations.
+        self.pushButton_add.pressed.connect(lambda: self.operation(operator.add))
+        self.pushButton_sub.pressed.connect(lambda: self.operation(operator.sub))
+        self.pushButton_mul.pressed.connect(lambda: self.operation(operator.mul))
+        self.pushButton_div.pressed.connect(lambda: self.operation(operator.truediv))  # operator.div for Python2.7
+
+        self.pushButton_pc.pressed.connect(self.operation_pc)
+        self.pushButton_eq.pressed.connect(self.equals)
+
+        # Setup actions
+        self.actionReset.triggered.connect(self.reset)
+        self.pushButton_ac.pressed.connect(self.reset)
+
+        self.actionExit.triggered.connect(self.close)
+
+        self.pushButton_m.pressed.connect(self.memory_store)
+        self.pushButton_mr.pressed.connect(self.memory_recall)
+
+        self.memory = 0
+        self.reset()
+
+        self.show()
+
+    def display(self):
+        self.lcdNumber.display(self.stack[-1])
+
+    def reset(self):
+        self.state = READY
+        self.stack = [0]
+        self.last_operation = None
+        self.current_op = None
+        self.display()
+
+    def memory_store(self):
+        self.memory = self.lcdNumber.value()
+
+    def memory_recall(self):
+        self.state = INPUT
+        self.stack[-1] = self.memory
+        self.display()
+
+    def input_number(self, v):
+        if self.state == READY:
+            self.state = INPUT
+            self.stack[-1] = v
+        else:
+            self.stack[-1] = self.stack[-1] * 10 + v
+
+        self.display()
+
+    def operation(self, op):
+        if self.current_op:  # Complete the current operation
+            self.equals()
+
+        self.stack.append(0)
+        self.state = INPUT
+        self.current_op = op
+
+    def operation_pc(self):
+        self.state = INPUT
+        self.stack[-1] *= 0.01
+        self.display()
+
+    def equals(self):
+        # Support to allow '=' to repeat previous operation
+        # if no further input has been added.
+        if self.state == READY and self.last_operation:
+            s, self.current_op = self.last_operation
+            self.stack.append(s)
+
+        if self.current_op:
+            self.last_operation = self.stack[-1], self.current_op
+
+            try:
+                self.stack = [self.current_op(*self.stack)]
+            except Exception:
+                self.lcdNumber.display("Err")
+                self.stack = [0]
+            else:
+                self.current_op = None
+                self.state = READY
+                self.display()
+
+
+if __name__ == "__main__":
+    app = QApplication(sys.argv)
+    app.setApplicationName("Calculon")
+
+    window = MainWindow()
+    app.exec()

pyqt6/demos/calculator/mainwindow-weird.ui

@@ -0,0 +1,583 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<ui version="4.0">
+ <class>MainWindow</class>
+ <widget class="QMainWindow" name="MainWindow">
+  <property name="geometry">
+   <rect>
+    <x>0</x>
+    <y>0</y>
+    <width>484</width>
+    <height>534</height>
+   </rect>
+  </property>
+  <property name="windowTitle">
+   <string>Calculon</string>
+  </property>
+  <widget class="QWidget" name="centralWidget">
+   <property name="sizePolicy">
+    <sizepolicy hsizetype="Maximum" vsizetype="Maximum">
+     <horstretch>0</horstretch>
+     <verstretch>0</verstretch>
+    </sizepolicy>
+   </property>
+   <layout class="QVBoxLayout" name="verticalLayout">
+    <item>
+     <layout class="QGridLayout" name="gridLayout">
+      <item row="3" column="0">
+       <widget class="QPushButton" name="pushButton_n4">
+        <property name="minimumSize">
+         <size>
+          <width>0</width>
+          <height>50</height>
+         </size>
+        </property>
+        <property name="font">
+         <font>
+          <pointsize>27</pointsize>
+          <weight>75</weight>
+          <bold>true</bold>
+         </font>
+        </property>
+        <property name="styleSheet">
+         <string notr="true">QPushButton {
+color: #1976D2;
+}</string>
+        </property>
+        <property name="text">
+         <string>4</string>
+        </property>
+        <property name="shortcut">
+         <string>4</string>
+        </property>
+       </widget>
+      </item>
+      <item row="4" column="0">
+       <widget class="QPushButton" name="pushButton_n1">
+        <property name="minimumSize">
+         <size>
+          <width>0</width>
+          <height>50</height>
+         </size>
+        </property>
+        <property name="font">
+         <font>
+          <pointsize>27</pointsize>
+          <weight>75</weight>
+          <bold>true</bold>
+         </font>
+        </property>
+        <property name="styleSheet">
+         <string notr="true">QPushButton {
+color: #1976D2;
+}</string>
+        </property>
+        <property name="text">
+         <string>1</string>
+        </property>
+        <property name="shortcut">
+         <string>1</string>
+        </property>
+       </widget>
+      </item>
+      <item row="2" column="1">
+       <widget class="QPushButton" name="pushButton_n8">
+        <property name="minimumSize">
+         <size>
+          <width>0</width>
+          <height>50</height>
+         </size>
+        </property>
+        <property name="font">
+         <font>
+          <pointsize>27</pointsize>
+          <weight>75</weight>
+          <bold>true</bold>
+         </font>
+        </property>
+        <property name="styleSheet">
+         <string notr="true">QPushButton {
+color: #1976D2;
+}</string>
+        </property>
+        <property name="text">
+         <string>8</string>
+        </property>
+        <property name="shortcut">
+         <string>8</string>
+        </property>
+       </widget>
+      </item>
+      <item row="2" column="3">
+       <widget class="QPushButton" name="pushButton_mul">
+        <property name="minimumSize">
+         <size>
+          <width>0</width>
+          <height>50</height>
+         </size>
+        </property>
+        <property name="font">
+         <font>
+          <pointsize>27</pointsize>
+          <weight>50</weight>
+          <bold>false</bold>
+         </font>
+        </property>
+        <property name="text">
+         <string>x</string>
+        </property>
+        <property name="shortcut">
+         <string>*</string>
+        </property>
+       </widget>
+      </item>
+      <item row="2" column="0">
+       <widget class="QPushButton" name="pushButton_n7">
+        <property name="minimumSize">
+         <size>
+          <width>0</width>
+          <height>50</height>
+         </size>
+        </property>
+        <property name="font">
+         <font>
+          <pointsize>27</pointsize>
+          <weight>75</weight>
+          <bold>true</bold>
+         </font>
+        </property>
+        <property name="styleSheet">
+         <string notr="true">QPushButton {
+color: #1976D2;
+}</string>
+        </property>
+        <property name="text">
+         <string>7</string>
+        </property>
+        <property name="shortcut">
+         <string>7</string>
+        </property>
+       </widget>
+      </item>
+      <item row="3" column="2">
+       <widget class="QPushButton" name="pushButton_n6">
+        <property name="minimumSize">
+         <size>
+          <width>0</width>
+          <height>50</height>
+         </size>
+        </property>
+        <property name="font">
+         <font>
+          <pointsize>27</pointsize>
+          <weight>75</weight>
+          <bold>true</bold>
+         </font>
+        </property>
+        <property name="styleSheet">
+         <string notr="true">QPushButton {
+color: #1976D2;
+}</string>
+        </property>
+        <property name="text">
+         <string>6</string>
+        </property>
+        <property name="shortcut">
+         <string>6</string>
+        </property>
+       </widget>
+      </item>
+      <item row="3" column="1">
+       <widget class="QPushButton" name="pushButton_n5">
+        <property name="minimumSize">
+         <size>
+          <width>0</width>
+          <height>50</height>
+         </size>
+        </property>
+        <property name="font">
+         <font>
+          <pointsize>27</pointsize>
+          <weight>75</weight>
+          <bold>true</bold>
+         </font>
+        </property>
+        <property name="styleSheet">
+         <string notr="true">QPushButton {
+color: #1976D2;
+}</string>
+        </property>
+        <property name="text">
+         <string>5</string>
+        </property>
+        <property name="shortcut">
+         <string>5</string>
+        </property>
+       </widget>
+      </item>
+      <item row="5" column="0">
+       <widget class="QPushButton" name="pushButton_n0">
+        <property name="minimumSize">
+         <size>
+          <width>0</width>
+          <height>50</height>
+         </size>
+        </property>
+        <property name="font">
+         <font>
+          <pointsize>27</pointsize>
+          <weight>75</weight>
+          <bold>true</bold>
+         </font>
+        </property>
+        <property name="styleSheet">
+         <string notr="true">QPushButton {
+color: #1976D2;
+}</string>
+        </property>
+        <property name="text">
+         <string>0</string>
+        </property>
+        <property name="shortcut">
+         <string>0</string>
+        </property>
+       </widget>
+      </item>
+      <item row="4" column="1">
+       <widget class="QPushButton" name="pushButton_n2">
+        <property name="minimumSize">
+         <size>
+          <width>0</width>
+          <height>50</height>
+         </size>
+        </property>
+        <property name="font">
+         <font>
+          <pointsize>27</pointsize>
+          <weight>75</weight>
+          <bold>true</bold>
+         </font>
+        </property>
+        <property name="styleSheet">
+         <string notr="true">QPushButton {
+color: #1976D2;
+}</string>
+        </property>
+        <property name="text">
+         <string>2</string>
+        </property>
+        <property name="shortcut">
+         <string>2</string>
+        </property>
+       </widget>
+      </item>
+      <item row="2" column="2">
+       <widget class="QPushButton" name="pushButton_n9">
+        <property name="minimumSize">
+         <size>
+          <width>0</width>
+          <height>50</height>
+         </size>
+        </property>
+        <property name="font">
+         <font>
+          <pointsize>27</pointsize>
+          <weight>75</weight>
+          <bold>true</bold>
+         </font>
+        </property>
+        <property name="styleSheet">
+         <string notr="true">QPushButton {
+color: #1976D2;
+}</string>
+        </property>
+        <property name="text">
+         <string>9</string>
+        </property>
+        <property name="shortcut">
+         <string>9</string>
+        </property>
+       </widget>
+      </item>
+      <item row="4" column="2">
+       <widget class="QPushButton" name="pushButton_n3">
+        <property name="minimumSize">
+         <size>
+          <width>0</width>
+          <height>50</height>
+         </size>
+        </property>
+        <property name="font">
+         <font>
+          <pointsize>27</pointsize>
+          <weight>75</weight>
+          <bold>true</bold>
+         </font>
+        </property>
+        <property name="styleSheet">
+         <string notr="true">QPushButton {
+color: #1976D2;
+}</string>
+        </property>
+        <property name="text">
+         <string>3</string>
+        </property>
+        <property name="shortcut">
+         <string>3</string>
+        </property>
+       </widget>
+      </item>
+      <item row="1" column="3">
+       <widget class="QPushButton" name="pushButton_div">
+        <property name="minimumSize">
+         <size>
+          <width>0</width>
+          <height>50</height>
+         </size>
+        </property>
+        <property name="font">
+         <font>
+          <pointsize>27</pointsize>
+          <weight>50</weight>
+          <bold>false</bold>
+         </font>
+        </property>
+        <property name="text">
+         <string>÷</string>
+        </property>
+        <property name="shortcut">
+         <string>/</string>
+        </property>
+       </widget>
+      </item>
+      <item row="3" column="3">
+       <widget class="QPushButton" name="pushButton_sub">
+        <property name="minimumSize">
+         <size>
+          <width>0</width>
+          <height>50</height>
+         </size>
+        </property>
+        <property name="font">
+         <font>
+          <pointsize>27</pointsize>
+          <weight>50</weight>
+          <bold>false</bold>
+         </font>
+        </property>
+        <property name="text">
+         <string>-</string>
+        </property>
+        <property name="shortcut">
+         <string>-</string>
+        </property>
+       </widget>
+      </item>
+      <item row="4" column="3">
+       <widget class="QPushButton" name="pushButton_add">
+        <property name="minimumSize">
+         <size>
+          <width>0</width>
+          <height>50</height>
+         </size>
+        </property>
+        <property name="font">
+         <font>
+          <pointsize>27</pointsize>
+          <weight>50</weight>
+          <bold>false</bold>
+         </font>
+        </property>
+        <property name="text">
+         <string>+</string>
+        </property>
+        <property name="shortcut">
+         <string>+</string>
+        </property>
+       </widget>
+      </item>
+      <item row="1" column="0">
+       <widget class="QPushButton" name="pushButton_ac">
+        <property name="minimumSize">
+         <size>
+          <width>0</width>
+          <height>50</height>
+         </size>
+        </property>
+        <property name="font">
+         <font>
+          <pointsize>27</pointsize>
+          <weight>50</weight>
+          <bold>false</bold>
+         </font>
+        </property>
+        <property name="styleSheet">
+         <string notr="true">QPushButton {
+    color: #f44336;
+}</string>
+        </property>
+        <property name="text">
+         <string>AC</string>
+        </property>
+        <property name="shortcut">
+         <string>Esc</string>
+        </property>
+       </widget>
+      </item>
+      <item row="1" column="2">
+       <widget class="QPushButton" name="pushButton_mr">
+        <property name="minimumSize">
+         <size>
+          <width>0</width>
+          <height>50</height>
+         </size>
+        </property>
+        <property name="font">
+         <font>
+          <pointsize>27</pointsize>
+          <weight>50</weight>
+          <bold>false</bold>
+         </font>
+        </property>
+        <property name="styleSheet">
+         <string notr="true">QPushButton {
+   color: #FFC107;
+}</string>
+        </property>
+        <property name="text">
+         <string>MR</string>
+        </property>
+        <property name="shortcut">
+         <string>R</string>
+        </property>
+       </widget>
+      </item>
+      <item row="1" column="1">
+       <widget class="QPushButton" name="pushButton_m">
+        <property name="minimumSize">
+         <size>
+          <width>0</width>
+          <height>50</height>
+         </size>
+        </property>
+        <property name="font">
+         <font>
+          <pointsize>27</pointsize>
+          <weight>50</weight>
+          <bold>false</bold>
+         </font>
+        </property>
+        <property name="styleSheet">
+         <string notr="true">QPushButton {
+   color: #FFC107;
+}</string>
+        </property>
+        <property name="text">
+         <string>M</string>
+        </property>
+        <property name="shortcut">
+         <string>M</string>
+        </property>
+       </widget>
+      </item>
+      <item row="5" column="1">
+       <widget class="QPushButton" name="pushButton_pc">
+        <property name="minimumSize">
+         <size>
+          <width>0</width>
+          <height>50</height>
+         </size>
+        </property>
+        <property name="font">
+         <font>
+          <pointsize>27</pointsize>
+          <weight>50</weight>
+          <bold>false</bold>
+         </font>
+        </property>
+        <property name="text">
+         <string>%</string>
+        </property>
+        <property name="shortcut">
+         <string>%</string>
+        </property>
+       </widget>
+      </item>
+      <item row="5" column="2" colspan="2">
+       <widget class="QPushButton" name="pushButton_eq">
+        <property name="minimumSize">
+         <size>
+          <width>0</width>
+          <height>50</height>
+         </size>
+        </property>
+        <property name="font">
+         <font>
+          <pointsize>27</pointsize>
+          <weight>75</weight>
+          <bold>true</bold>
+         </font>
+        </property>
+        <property name="styleSheet">
+         <string notr="true">QPushButton {
+color: #4CAF50;
+}</string>
+        </property>
+        <property name="text">
+         <string>=</string>
+        </property>
+        <property name="shortcut">
+         <string>Return</string>
+        </property>
+       </widget>
+      </item>
+     </layout>
+    </item>
+    <item>
+     <widget class="QLCDNumber" name="lcdNumber">
+      <property name="digitCount">
+       <number>10</number>
+      </property>
+     </widget>
+    </item>
+   </layout>
+  </widget>
+  <widget class="QMenuBar" name="menuBar">
+   <property name="geometry">
+    <rect>
+     <x>0</x>
+     <y>0</y>
+     <width>484</width>
+     <height>26</height>
+    </rect>
+   </property>
+   <widget class="QMenu" name="menuFile">
+    <property name="title">
+     <string>File</string>
+    </property>
+    <addaction name="actionReset"/>
+    <addaction name="actionExit"/>
+   </widget>
+   <addaction name="menuFile"/>
+  </widget>
+  <widget class="QStatusBar" name="statusBar"/>
+  <action name="actionExit">
+   <property name="text">
+    <string>Exit</string>
+   </property>
+   <property name="shortcut">
+    <string>Ctrl+Q</string>
+   </property>
+  </action>
+  <action name="actionReset">
+   <property name="text">
+    <string>Reset</string>
+   </property>
+   <property name="shortcut">
+    <string>Ctrl+R</string>
+   </property>
+  </action>
+ </widget>
+ <layoutdefault spacing="6" margin="11"/>
+ <resources/>
+ <connections/>
+</ui>

pyqt6/demos/calculator/mainwindow.ui

@@ -0,0 +1,583 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<ui version="4.0">
+ <class>MainWindow</class>
+ <widget class="QMainWindow" name="MainWindow">
+  <property name="geometry">
+   <rect>
+    <x>0</x>
+    <y>0</y>
+    <width>484</width>
+    <height>433</height>
+   </rect>
+  </property>
+  <property name="windowTitle">
+   <string>Calculon</string>
+  </property>
+  <widget class="QWidget" name="centralWidget">
+   <property name="sizePolicy">
+    <sizepolicy hsizetype="Maximum" vsizetype="Maximum">
+     <horstretch>0</horstretch>
+     <verstretch>0</verstretch>
+    </sizepolicy>
+   </property>
+   <layout class="QVBoxLayout" name="verticalLayout">
+    <item>
+     <widget class="QLCDNumber" name="lcdNumber">
+      <property name="digitCount">
+       <number>10</number>
+      </property>
+     </widget>
+    </item>
+    <item>
+     <layout class="QGridLayout" name="gridLayout">
+      <item row="3" column="0">
+       <widget class="QPushButton" name="pushButton_n4">
+        <property name="minimumSize">
+         <size>
+          <width>0</width>
+          <height>50</height>
+         </size>
+        </property>
+        <property name="font">
+         <font>
+          <pointsize>27</pointsize>
+          <weight>75</weight>
+          <bold>true</bold>
+         </font>
+        </property>
+        <property name="styleSheet">
+         <string notr="true">QPushButton {
+color: #1976D2;
+}</string>
+        </property>
+        <property name="text">
+         <string>4</string>
+        </property>
+        <property name="shortcut">
+         <string>4</string>
+        </property>
+       </widget>
+      </item>
+      <item row="4" column="0">
+       <widget class="QPushButton" name="pushButton_n1">
+        <property name="minimumSize">
+         <size>
+          <width>0</width>
+          <height>50</height>
+         </size>
+        </property>
+        <property name="font">
+         <font>
+          <pointsize>27</pointsize>
+          <weight>75</weight>
+          <bold>true</bold>
+         </font>
+        </property>
+        <property name="styleSheet">
+         <string notr="true">QPushButton {
+color: #1976D2;
+}</string>
+        </property>
+        <property name="text">
+         <string>1</string>
+        </property>
+        <property name="shortcut">
+         <string>1</string>
+        </property>
+       </widget>
+      </item>
+      <item row="2" column="1">
+       <widget class="QPushButton" name="pushButton_n8">
+        <property name="minimumSize">
+         <size>
+          <width>0</width>
+          <height>50</height>
+         </size>
+        </property>
+        <property name="font">
+         <font>
+          <pointsize>27</pointsize>
+          <weight>75</weight>
+          <bold>true</bold>
+         </font>
+        </property>
+        <property name="styleSheet">
+         <string notr="true">QPushButton {
+color: #1976D2;
+}</string>
+        </property>
+        <property name="text">
+         <string>8</string>
+        </property>
+        <property name="shortcut">
+         <string>8</string>
+        </property>
+       </widget>
+      </item>
+      <item row="2" column="3">
+       <widget class="QPushButton" name="pushButton_mul">
+        <property name="minimumSize">
+         <size>
+          <width>0</width>
+          <height>50</height>
+         </size>
+        </property>
+        <property name="font">
+         <font>
+          <pointsize>27</pointsize>
+          <weight>50</weight>
+          <bold>false</bold>
+         </font>
+        </property>
+        <property name="text">
+         <string>x</string>
+        </property>
+        <property name="shortcut">
+         <string>*</string>
+        </property>
+       </widget>
+      </item>
+      <item row="2" column="0">
+       <widget class="QPushButton" name="pushButton_n7">
+        <property name="minimumSize">
+         <size>
+          <width>0</width>
+          <height>50</height>
+         </size>
+        </property>
+        <property name="font">
+         <font>
+          <pointsize>27</pointsize>
+          <weight>75</weight>
+          <bold>true</bold>
+         </font>
+        </property>
+        <property name="styleSheet">
+         <string notr="true">QPushButton {
+color: #1976D2;
+}</string>
+        </property>
+        <property name="text">
+         <string>7</string>
+        </property>
+        <property name="shortcut">
+         <string>7</string>
+        </property>
+       </widget>
+      </item>
+      <item row="3" column="2">
+       <widget class="QPushButton" name="pushButton_n6">
+        <property name="minimumSize">
+         <size>
+          <width>0</width>
+          <height>50</height>
+         </size>
+        </property>
+        <property name="font">
+         <font>
+          <pointsize>27</pointsize>
+          <weight>75</weight>
+          <bold>true</bold>
+         </font>
+        </property>
+        <property name="styleSheet">
+         <string notr="true">QPushButton {
+color: #1976D2;
+}</string>
+        </property>
+        <property name="text">
+         <string>6</string>
+        </property>
+        <property name="shortcut">
+         <string>6</string>
+        </property>
+       </widget>
+      </item>
+      <item row="3" column="1">
+       <widget class="QPushButton" name="pushButton_n5">
+        <property name="minimumSize">
+         <size>
+          <width>0</width>
+          <height>50</height>
+         </size>
+        </property>
+        <property name="font">
+         <font>
+          <pointsize>27</pointsize>
+          <weight>75</weight>
+          <bold>true</bold>
+         </font>
+        </property>
+        <property name="styleSheet">
+         <string notr="true">QPushButton {
+color: #1976D2;
+}</string>
+        </property>
+        <property name="text">
+         <string>5</string>
+        </property>
+        <property name="shortcut">
+         <string>5</string>
+        </property>
+       </widget>
+      </item>
+      <item row="5" column="0">
+       <widget class="QPushButton" name="pushButton_n0">
+        <property name="minimumSize">
+         <size>
+          <width>0</width>
+          <height>50</height>
+         </size>
+        </property>
+        <property name="font">
+         <font>
+          <pointsize>27</pointsize>
+          <weight>75</weight>
+          <bold>true</bold>
+         </font>
+        </property>
+        <property name="styleSheet">
+         <string notr="true">QPushButton {
+color: #1976D2;
+}</string>
+        </property>
+        <property name="text">
+         <string>0</string>
+        </property>
+        <property name="shortcut">
+         <string>0</string>
+        </property>
+       </widget>
+      </item>
+      <item row="4" column="1">
+       <widget class="QPushButton" name="pushButton_n2">
+        <property name="minimumSize">
+         <size>
+          <width>0</width>
+          <height>50</height>
+         </size>
+        </property>
+        <property name="font">
+         <font>
+          <pointsize>27</pointsize>
+          <weight>75</weight>
+          <bold>true</bold>
+         </font>
+        </property>
+        <property name="styleSheet">
+         <string notr="true">QPushButton {
+color: #1976D2;
+}</string>
+        </property>
+        <property name="text">
+         <string>2</string>
+        </property>
+        <property name="shortcut">
+         <string>2</string>
+        </property>
+       </widget>
+      </item>
+      <item row="2" column="2">
+       <widget class="QPushButton" name="pushButton_n9">
+        <property name="minimumSize">
+         <size>
+          <width>0</width>
+          <height>50</height>
+         </size>
+        </property>
+        <property name="font">
+         <font>
+          <pointsize>27</pointsize>
+          <weight>75</weight>
+          <bold>true</bold>
+         </font>
+        </property>
+        <property name="styleSheet">
+         <string notr="true">QPushButton {
+color: #1976D2;
+}</string>
+        </property>
+        <property name="text">
+         <string>9</string>
+        </property>
+        <property name="shortcut">
+         <string>9</string>
+        </property>
+       </widget>
+      </item>
+      <item row="4" column="2">
+       <widget class="QPushButton" name="pushButton_n3">
+        <property name="minimumSize">
+         <size>
+          <width>0</width>
+          <height>50</height>
+         </size>
+        </property>
+        <property name="font">
+         <font>
+          <pointsize>27</pointsize>
+          <weight>75</weight>
+          <bold>true</bold>
+         </font>
+        </property>
+        <property name="styleSheet">
+         <string notr="true">QPushButton {
+color: #1976D2;
+}</string>
+        </property>
+        <property name="text">
+         <string>3</string>
+        </property>
+        <property name="shortcut">
+         <string>3</string>
+        </property>
+       </widget>
+      </item>
+      <item row="1" column="3">
+       <widget class="QPushButton" name="pushButton_div">
+        <property name="minimumSize">
+         <size>
+          <width>0</width>
+          <height>50</height>
+         </size>
+        </property>
+        <property name="font">
+         <font>
+          <pointsize>27</pointsize>
+          <weight>50</weight>
+          <bold>false</bold>
+         </font>
+        </property>
+        <property name="text">
+         <string>÷</string>
+        </property>
+        <property name="shortcut">
+         <string>/</string>
+        </property>
+       </widget>
+      </item>
+      <item row="3" column="3">
+       <widget class="QPushButton" name="pushButton_sub">
+        <property name="minimumSize">
+         <size>
+          <width>0</width>
+          <height>50</height>
+         </size>
+        </property>
+        <property name="font">
+         <font>
+          <pointsize>27</pointsize>
+          <weight>50</weight>
+          <bold>false</bold>
+         </font>
+        </property>
+        <property name="text">
+         <string>-</string>
+        </property>
+        <property name="shortcut">
+         <string>-</string>
+        </property>
+       </widget>
+      </item>
+      <item row="4" column="3">
+       <widget class="QPushButton" name="pushButton_add">
+        <property name="minimumSize">
+         <size>
+          <width>0</width>
+          <height>50</height>
+         </size>
+        </property>
+        <property name="font">
+         <font>
+          <pointsize>27</pointsize>
+          <weight>50</weight>
+          <bold>false</bold>
+         </font>
+        </property>
+        <property name="text">
+         <string>+</string>
+        </property>
+        <property name="shortcut">
+         <string>+</string>
+        </property>
+       </widget>
+      </item>
+      <item row="1" column="0">
+       <widget class="QPushButton" name="pushButton_ac">
+        <property name="minimumSize">
+         <size>
+          <width>0</width>
+          <height>50</height>
+         </size>
+        </property>
+        <property name="font">
+         <font>
+          <pointsize>27</pointsize>
+          <weight>50</weight>
+          <bold>false</bold>
+         </font>
+        </property>
+        <property name="styleSheet">
+         <string notr="true">QPushButton {
+    color: #f44336;
+}</string>
+        </property>
+        <property name="text">
+         <string>AC</string>
+        </property>
+        <property name="shortcut">
+         <string>Esc</string>
+        </property>
+       </widget>
+      </item>
+      <item row="1" column="2">
+       <widget class="QPushButton" name="pushButton_mr">
+        <property name="minimumSize">
+         <size>
+          <width>0</width>
+          <height>50</height>
+         </size>
+        </property>
+        <property name="font">
+         <font>
+          <pointsize>27</pointsize>
+          <weight>50</weight>
+          <bold>false</bold>
+         </font>
+        </property>
+        <property name="styleSheet">
+         <string notr="true">QPushButton {
+   color: #FFC107;
+}</string>
+        </property>
+        <property name="text">
+         <string>MR</string>
+        </property>
+        <property name="shortcut">
+         <string>R</string>
+        </property>
+       </widget>
+      </item>
+      <item row="1" column="1">
+       <widget class="QPushButton" name="pushButton_m">
+        <property name="minimumSize">
+         <size>
+          <width>0</width>
+          <height>50</height>
+         </size>
+        </property>
+        <property name="font">
+         <font>
+          <pointsize>27</pointsize>
+          <weight>50</weight>
+          <bold>false</bold>
+         </font>
+        </property>
+        <property name="styleSheet">
+         <string notr="true">QPushButton {
+   color: #FFC107;
+}</string>
+        </property>
+        <property name="text">
+         <string>M</string>
+        </property>
+        <property name="shortcut">
+         <string>M</string>
+        </property>
+       </widget>
+      </item>
+      <item row="5" column="1">
+       <widget class="QPushButton" name="pushButton_pc">
+        <property name="minimumSize">
+         <size>
+          <width>0</width>
+          <height>50</height>
+         </size>
+        </property>
+        <property name="font">
+         <font>
+          <pointsize>27</pointsize>
+          <weight>50</weight>
+          <bold>false</bold>
+         </font>
+        </property>
+        <property name="text">
+         <string>%</string>
+        </property>
+        <property name="shortcut">
+         <string>%</string>
+        </property>
+       </widget>
+      </item>
+      <item row="5" column="2" colspan="2">
+       <widget class="QPushButton" name="pushButton_eq">
+        <property name="minimumSize">
+         <size>
+          <width>0</width>
+          <height>50</height>
+         </size>
+        </property>
+        <property name="font">
+         <font>
+          <pointsize>27</pointsize>
+          <weight>75</weight>
+          <bold>true</bold>
+         </font>
+        </property>
+        <property name="styleSheet">
+         <string notr="true">QPushButton {
+color: #4CAF50;
+}</string>
+        </property>
+        <property name="text">
+         <string>=</string>
+        </property>
+        <property name="shortcut">
+         <string>Return</string>
+        </property>
+       </widget>
+      </item>
+     </layout>
+    </item>
+   </layout>
+  </widget>
+  <widget class="QMenuBar" name="menuBar">
+   <property name="geometry">
+    <rect>
+     <x>0</x>
+     <y>0</y>
+     <width>484</width>
+     <height>22</height>
+    </rect>
+   </property>
+   <widget class="QMenu" name="menuFile">
+    <property name="title">
+     <string>File</string>
+    </property>
+    <addaction name="actionReset"/>
+    <addaction name="actionExit"/>
+   </widget>
+   <addaction name="menuFile"/>
+  </widget>
+  <widget class="QStatusBar" name="statusBar"/>
+  <action name="actionExit">
+   <property name="text">
+    <string>Exit</string>
+   </property>
+   <property name="shortcut">
+    <string>Ctrl+Q</string>
+   </property>
+  </action>
+  <action name="actionReset">
+   <property name="text">
+    <string>Reset</string>
+   </property>
+   <property name="shortcut">
+    <string>Ctrl+R</string>
+   </property>
+  </action>
+ </widget>
+ <layoutdefault spacing="6" margin="11"/>
+ <resources/>
+ <connections/>
+</ui>

pyqt6/demos/calculator/requirements.txt

@@ -0,0 +1 @@
+PyQt5>=5.6

pyqt6/demos/camera/README.md

@@ -0,0 +1,16 @@
+# NSAViewer — Somebody's watching you.
+
+With this webcam snapshot application you can take photos of what is currently
+being viewed by your webcam. Uses the Qt QtMultimedia framework for handling
+all the interaction with the camera, and supports multiple cameras if you have
+them.
+
+![Camera](screenshot-camera.jpg)
+
+> If you want to learn more about build GUI applications with Python,
+take a look at my [PyQt5 tutorials](https://www.pythonguis.com)
+which covers everything you need to know to start building your own applications with PyQt5.
+
+## Other licenses
+
+Icons used in the application are by [Yusuke Kamiyaman](http://p.yusukekamiyamane.com/).

pyqt6/demos/camera/main.py

@@ -0,0 +1,117 @@
+import os
+import sys
+import time
+
+from PyQt6.QtCore import QSize
+from PyQt6.QtGui import QAction, QIcon
+from PyQt6.QtMultimedia import QCamera, QCameraImageCapture, QCameraInfo
+from PyQt6.QtMultimediaWidgets import QCameraViewfinder
+from PyQt6.QtWidgets import (
+    QApplication,
+    QComboBox,
+    QErrorMessage,
+    QFileDialog,
+    QMainWindow,
+    QStatusBar,
+    QToolBar,
+)
+
+
+class MainWindow(QMainWindow):
+    def __init__(self):
+        super().__init__()
+
+        self.available_cameras = QCameraInfo.availableCameras()
+        if not self.available_cameras:
+            pass  # quit
+
+        self.status = QStatusBar()
+        self.setStatusBar(self.status)
+
+        self.save_path = ""
+
+        self.viewfinder = QCameraViewfinder()
+        self.viewfinder.show()
+        self.setCentralWidget(self.viewfinder)
+
+        # Set the default camera.
+        self.select_camera(0)
+
+        # Setup tools
+        camera_toolbar = QToolBar("Camera")
+        camera_toolbar.setIconSize(QSize(14, 14))
+        self.addToolBar(camera_toolbar)
+
+        photo_action = QAction(
+            QIcon(os.path.join("images", "camera-black.png")),
+            "Take photo...",
+            self,
+        )
+        photo_action.setStatusTip("Take photo of current view")
+        photo_action.triggered.connect(self.take_photo)
+        camera_toolbar.addAction(photo_action)
+
+        change_folder_action = QAction(
+            QIcon(os.path.join("images", "blue-folder-horizontal-open.png")),
+            "Change save location...",
+            self,
+        )
+        change_folder_action.setStatusTip("Change folder where photos are saved.")
+        change_folder_action.triggered.connect(self.change_folder)
+        camera_toolbar.addAction(change_folder_action)
+
+        camera_selector = QComboBox()
+        camera_selector.addItems([c.description() for c in self.available_cameras])
+        camera_selector.currentIndexChanged.connect(self.select_camera)
+
+        camera_toolbar.addWidget(camera_selector)
+
+        self.setWindowTitle("NSAViewer")
+        self.show()
+
+    def select_camera(self, i):
+        self.camera = QCamera(self.available_cameras[i])
+        self.camera.setViewfinder(self.viewfinder)
+        self.camera.setCaptureMode(QCamera.CaptureStillImage)
+        self.camera.error.connect(lambda: self.alert(self.camera.errorString()))
+        self.camera.start()
+
+        self.capture = QCameraImageCapture(self.camera)
+        self.capture.error.connect(lambda i, e, s: self.alert(s))
+        self.capture.imageCaptured.connect(
+            lambda d, i: self.status.showMessage("Image %04d captured" % self.save_seq)
+        )
+
+        self.current_camera_name = self.available_cameras[i].description()
+        self.save_seq = 0
+
+    def take_photo(self):
+        timestamp = time.strftime("%d-%b-%Y-%H_%M_%S")
+        self.capture.capture(
+            os.path.join(
+                self.save_path,
+                "%s-%04d-%s.jpg" % (self.current_camera_name, self.save_seq, timestamp),
+            )
+        )
+        self.save_seq += 1
+
+    def change_folder(self):
+        path = QFileDialog.getExistingDirectory(self, "Snapshot save location", "")
+        if path:
+            self.save_path = path
+            self.save_seq = 0
+
+    def alert(self, s):
+        """
+        Handle errors coming from QCamera dn QCameraImageCapture by displaying alerts.
+        """
+        err = QErrorMessage(self)
+        err.showMessage(s)
+
+
+if __name__ == "__main__":
+    app = QApplication(sys.argv)
+    app.setApplicationName("NSAViewer")
+
+    window = MainWindow()
+    app.exec()

pyqt6/demos/camera/requirements.txt

@@ -0,0 +1 @@
+PyQt5>=5.6

pyqt6/demos/colorpicker/main.py

@@ -0,0 +1,72 @@
+import os
+import sys
+
+from PyQt6.QtGui import QIcon
+from PyQt6.QtWidgets import (
+    QAction,
+    QApplication,
+    QColorDialog,
+    QMenu,
+    QSystemTrayIcon,
+)
+
+app = QApplication(sys.argv)
+app.setQuitOnLastWindowClosed(False)
+
+# Create the icon
+icon = QIcon(os.path.join("images", "color.png"))
+
+clipboard = QApplication.clipboard()
+dialog = QColorDialog()
+
+
+def copy_color_hex():
+    if dialog.exec():
+        color = dialog.currentColor()
+        clipboard.setText(color.name())
+
+
+def copy_color_rgb():
+    if dialog.exec():
+        color = dialog.currentColor()
+        clipboard.setText(
+            "rgb(%d, %d, %d)" % (color.red(), color.green(), color.blue())
+        )
+
+
+def copy_color_hsv():
+    if dialog.exec():
+        color = dialog.currentColor()
+        clipboard.setText(
+            "hsv(%d, %d, %d)" % (color.hue(), color.saturation(), color.value())
+        )
+
+
+# Create the tray
+tray = QSystemTrayIcon()
+tray.setIcon(icon)
+tray.setVisible(True)
+
+# Create the menu
+menu = QMenu()
+action1 = QAction("Hex")
+action1.triggered.connect(copy_color_hex)
+menu.addAction(action1)
+
+action2 = QAction("RGB")
+action2.triggered.connect(copy_color_rgb)
+menu.addAction(action2)
+
+action3 = QAction("HSV")
+action3.triggered.connect(copy_color_hsv)
+menu.addAction(action3)
+
+action4 = QAction("Exit")
+action4.triggered.connect(app.quit)
+menu.addAction(action4)
+
+# Add the menu to the tray
+tray.setContextMenu(menu)
+
+
+app.exec()

pyqt6/demos/crypto/README.md

@@ -0,0 +1,35 @@
+# Doughnut — An exchange rate tracker for people nuts about dough, in PyQt.
+
+This is a simple currency exchange rate tracker implemented in PyQt, using the [fixer.io](http://fixer.io) API
+for data. The default setup shows currency data for the preceding 180 days.
+
+![Doughnut](screenshot-currency1.jpg)
+
+Data is loaded progressively, with increasing resolution. Currency rates for a given date are shown in the right
+hand panel and updated to follow the position of the mouse.
+
+![Doughnut](screenshot-currency2.jpg)
+
+> If you want to learn more about build GUI applications with Python,
+take a look at my [PyQt5 tutorials](https://www.pythonguis.com)
+which covers everything you need to know to start building your own applications with PyQt5.
+
+## Code notes
+
+### Data handling
+
+The interface presents a tracking plot (using PyQtGraph) of rates over the past 180 days. Since we don't want to
+spam a free service, requests to the API are rate-limited to 1-per-second, giving a full-data-load time of 180s (3 min).
+
+To avoid waiting each time, we use `requests_cache` which uses a local sqlite database to store the result of recent
+requests. The requests for data use a progressive 'search' approach: where there is a gap in the data, the middle
+point is filled first, and it prefers to load the most recent timepoints first. This means the whole plot gradually
+increases in resolution over time, rather than working backwards only.
+
+### Conversions
+
+By default the app retrieves EUR rates and shows conversions to this base currency. If you change base currency
+it will retrieve all data again for that new currency. This is daft, since if we have rates vs. EUR we can calculate
+any other currency->currency conversion via EUR (with a small loss of accuracy).
+
+

pyqt6/demos/crypto/constants.py

@@ -0,0 +1,38 @@
+# CryptoCompare.com API Key
+CRYPTOCOMPARE_API_KEY = ""
+
+
+# Base currency is used to retrieve rates from bitcoinaverage.
+DEFAULT_BASE_CURRENCY = "USD"
+AVAILABLE_BASE_CURRENCIES = ["USD", "EUR", "GBP"]
+
+# The crypto currencies to retrieve data about.
+AVAILABLE_CRYPTO_CURRENCIES = [
+    "BTC",
+    "ETH",
+    "LTC",
+    "EOS",
+    "XRP",
+    "BCH",
+]  #
+DEFAULT_DISPLAY_CURRENCIES = ["BTC", "ETH", "LTC"]
+
+
+# Number of historic timepoints to plot (days).
+NUMBER_OF_TIMEPOINTS = 150
+
+# Colour cycle to use for plotting currencies.
+BREWER12PAIRED = [
+    "#a6cee3",
+    "#1f78b4",
+    "#b2df8a",
+    "#33a02c",
+    "#fb9a99",
+    "#e31a1c",
+    "#fdbf6f",
+    "#ff7f00",
+    "#cab2d6",
+    "#6a3d9a",
+    "#ffff99",
+    "#b15928",
+]

pyqt6/demos/crypto/main.py

@@ -0,0 +1,305 @@
+import sys
+from itertools import cycle
+
+import constants
+import numpy as np
+
+# import requests_cache
+from PyQt6.QtCore import (
+    Qt,
+    QThreadPool,
+)
+from PyQt6.QtGui import (
+    QBrush,
+    QColor,
+    QStandardItem,
+    QStandardItemModel,
+)
+from PyQt6.QtWidgets import (
+    QApplication,
+    QComboBox,
+    QHBoxLayout,
+    QMainWindow,
+    QMessageBox,
+    QProgressBar,
+    QTableView,
+    QToolBar,
+    QWidget,
+)
+from workers import UpdateWorker
+
+color_cycle = cycle(constants.BREWER12PAIRED)
+# requests_cache.install_cache('cache')
+
+# Must be imported after PyQt6.
+import pyqtgraph as pg
+
+pg.setConfigOption("background", "w")
+pg.setConfigOption("foreground", "k")
+
+
+class MainWindow(QMainWindow):
+    def __init__(self):
+        super().__init__()
+
+        layout = QHBoxLayout()
+
+        self.ax = pg.PlotWidget()
+        self.ax.showGrid(True, True)
+
+        self.line = pg.InfiniteLine(
+            pos=-20,
+            pen=pg.mkPen("k", width=3),
+            movable=False,  # We have our own code to handle dragless moving.
+        )
+
+        self.ax.addItem(self.line)
+        self.ax.setLabel("left", text="Rate")
+        self.p1 = self.ax.getPlotItem()
+        self.p1.scene().sigMouseMoved.connect(self.mouse_move_handler)
+
+        # Add the right-hand axis for the market activity.
+        self.p2 = pg.ViewBox()
+        self.p2.enableAutoRange(axis=pg.ViewBox.XYAxes, enable=True)
+        self.p1.showAxis("right")
+        self.p1.scene().addItem(self.p2)
+        self.p2.setXLink(self.p1)
+        self.ax2 = self.p1.getAxis("right")
+        self.ax2.linkToView(self.p2)
+        self.ax2.setGrid(False)
+        self.ax2.setLabel(text="Volume")
+
+        self._market_activity = pg.PlotCurveItem(
+            np.arange(constants.NUMBER_OF_TIMEPOINTS),
+            np.arange(constants.NUMBER_OF_TIMEPOINTS),
+            pen=pg.mkPen("k", style=Qt.PenStyle.DashLine, width=1),
+        )
+        self.p2.addItem(self._market_activity)
+
+        # Automatically rescale our twinned Y axis.
+        self.p1.vb.sigResized.connect(self.update_plot_scale)
+
+        self.base_currency = constants.DEFAULT_BASE_CURRENCY
+
+        # Store a reference to lines on the plot, and items in our
+        # data viewer we can update rather than redraw.
+        self._data_lines = dict()
+        self._data_items = dict()
+        self._data_colors = dict()
+        self._data_visible = constants.DEFAULT_DISPLAY_CURRENCIES
+
+        self.listView = QTableView()
+        self.model = QStandardItemModel()
+        self.model.setHorizontalHeaderLabels(["Currency", "Rate"])
+        self.model.itemChanged.connect(self.check_check_state)
+
+        self.listView.setModel(self.model)
+
+        self.threadpool = QThreadPool()
+        self.worker = False
+
+        layout.addWidget(self.ax)
+        layout.addWidget(self.listView)
+
+        widget = QWidget()
+        widget.setLayout(layout)
+        self.setCentralWidget(widget)
+        self.listView.setFixedSize(226, 400)
+        self.setFixedSize(650, 400)
+
+        toolbar = QToolBar("Main")
+        self.addToolBar(toolbar)
+        self.currencyList = QComboBox()
+
+        toolbar.addWidget(self.currencyList)
+        self.update_currency_list(constants.AVAILABLE_BASE_CURRENCIES)
+        self.currencyList.setCurrentText(self.base_currency)
+        self.currencyList.currentTextChanged.connect(self.change_base_currency)
+
+        self.progress = QProgressBar()
+        self.progress.setRange(0, 100)
+        toolbar.addWidget(self.progress)
+
+        self.refresh_historic_rates()
+        self.setWindowTitle("Goodforbitcoin")
+        self.show()
+
+    def update_currency_list(self, currencies):
+        for currency in currencies:
+            self.currencyList.addItem(currency)
+
+        self.currencyList.model().sort(0)
+
+    def check_check_state(self, i):
+        if not i.isCheckable():  # Skip data columns.
+            return
+
+        currency = i.text()
+        checked = i.checkState() == Qt.CheckState.Checked
+
+        if currency in self._data_visible:
+            if not checked:
+                self._data_visible.remove(currency)
+                self.redraw()
+        else:
+            if checked:
+                self._data_visible.append(currency)
+                self.redraw()
+
+    def get_currency_color(self, currency):
+        if currency not in self._data_colors:
+            self._data_colors[currency] = next(color_cycle)
+
+        return self._data_colors[currency]
+
+    def get_or_create_data_row(self, currency):
+        if currency not in self._data_items:
+            self._data_items[currency] = self.add_data_row(currency)
+        return self._data_items[currency]
+
+    def add_data_row(self, currency):
+        citem = QStandardItem()
+        citem.setText(currency)
+        citem.setForeground(QBrush(QColor(self.get_currency_color(currency))))
+        citem.setColumnCount(2)
+        citem.setCheckable(True)
+        if currency in constants.DEFAULT_DISPLAY_CURRENCIES:
+            citem.setCheckState(Qt.CheckState.Checked)
+
+        vitem = QStandardItem()
+
+        vitem.setTextAlignment(
+            Qt.AlignmentFlag.AlignRight | Qt.AlignmentFlag.AlignVCenter
+        )
+        self.model.setColumnCount(2)
+        self.model.appendRow([citem, vitem])
+        self.model.sort(0)
+        return citem, vitem
+
+    def mouse_move_handler(self, pos):
+        pos = self.ax.getViewBox().mapSceneToView(pos)
+        self.line.setPos(pos.x())
+        self.update_data_viewer(int(pos.x()))
+
+    def update_data_viewer(self, i):
+        if i not in range(constants.NUMBER_OF_TIMEPOINTS):
+            return
+
+        for currency, data in self.data.items():
+            self.update_data_row(currency, data[i])
+
+    def update_data_row(self, currency, data):
+        citem, vitem = self.get_or_create_data_row(currency)
+        vitem.setText("%.4f" % data["close"])
+
+    def change_base_currency(self, currency):
+        self.base_currency = currency
+        self.refresh_historic_rates()
+
+    def refresh_historic_rates(self):
+        if self.worker:
+            # If we have a current worker, send a kill signal
+            self.worker.signals.cancel.emit()
+
+        # Prefill our data store with None ('no data')
+        self.data = {}
+        self.volume = []
+
+        self.worker = UpdateWorker(self.base_currency)
+        # Handle callbacks with data and trigger refresh.
+        self.worker.signals.data.connect(self.result_data_callback)
+        self.worker.signals.finished.connect(self.refresh_finished)
+        self.worker.signals.progress.connect(self.progress_callback)
+        self.worker.signals.error.connect(self.notify_error)
+        self.threadpool.start(self.worker)
+
+    def result_data_callback(self, rates, volume):
+        self.data = rates
+        self.volume = volume
+        self.redraw()
+        self.update_data_viewer(constants.NUMBER_OF_TIMEPOINTS - 1)
+
+    def progress_callback(self, progress):
+        self.progress.setValue(progress)
+
+    def refresh_finished(self):
+        self.worker = False
+        self.redraw()
+
+    def notify_error(self, error):
+        e, tb = error
+        msg = QMessageBox()
+        msg.setIcon(QMessageBox.Icon.Warning)
+        msg.setText(e.__class__.__name__)
+        msg.setInformativeText(str(e))
+        msg.setDetailedText(tb)
+        msg.exec()
+
+    def update_plot_scale(self):
+        self.p2.setGeometry(self.p1.vb.sceneBoundingRect())
+
+    def redraw(self):
+        y_min, y_max = sys.maxsize, 0
+        x = np.arange(constants.NUMBER_OF_TIMEPOINTS)
+
+        # Pre-process data into lists of x, y values.
+        for currency, data in self.data.items():
+            if data:
+                _, close, high, low = zip(
+                    *[(v["time"], v["close"], v["high"], v["low"]) for v in data]
+                )
+
+                if currency in self._data_visible:
+                    # This line should be visible, if it's not drawn draw it.
+                    if currency not in self._data_lines:
+                        self._data_lines[currency] = {}
+                        self._data_lines[currency]["high"] = self.ax.plot(
+                            x,
+                            high,  # Unpack a list of tuples into two lists, passed as individual args.
+                            pen=pg.mkPen(
+                                self.get_currency_color(currency),
+                                width=2,
+                                style=Qt.PenStyle.DotLine,
+                            ),
+                        )
+                        self._data_lines[currency]["low"] = self.ax.plot(
+                            x,
+                            low,  # Unpack a list of tuples into two lists, passed as individual args.
+                            pen=pg.mkPen(
+                                self.get_currency_color(currency),
+                                width=2,
+                                style=Qt.PenStyle.DotLine,
+                            ),
+                        )
+                        self._data_lines[currency]["close"] = self.ax.plot(
+                            x,
+                            close,  # Unpack a list of tuples into two lists, passed as individual args.
+                            pen=pg.mkPen(
+                                self.get_currency_color(currency),
+                                width=3,
+                            ),
+                        )
+                    else:
+                        self._data_lines[currency]["high"].setData(x, high)
+                        self._data_lines[currency]["low"].setData(x, low)
+                        self._data_lines[currency]["close"].setData(x, close)
+
+                    y_min, y_max = min(y_min, *low), max(y_max, *high)
+
+                else:
+                    # This line should not be visible, if it is delete it.
+                    if currency in self._data_lines:
+                        self._data_lines[currency]["high"].clear()
+                        self._data_lines[currency]["low"].clear()
+                        self._data_lines[currency]["close"].clear()
+
+        self.ax.setLimits(yMin=y_min * 0.9, yMax=y_max * 1.1, xMin=min(x), xMax=max(x))
+
+        self._market_activity.setData(x, self.volume)
+        self.p2.setYRange(0, max(self.volume))
+
+
+if __name__ == "__main__":
+    app = QApplication(sys.argv)
+    window = MainWindow()
+    app.exec()

pyqt6/demos/crypto/requirements.txt

@@ -0,0 +1,4 @@
+PyQt5>=5.6
+requests>=2.0.0
+requests-cache>=0.4.13
+pyqtgraph>=0.10

pyqt6/demos/crypto/workers.py

@@ -0,0 +1,91 @@
+import traceback
+
+import constants
+import requests
+
+# import requests_cache
+from PyQt6.QtCore import (
+    QObject,
+    QRunnable,
+    pyqtSignal,
+    pyqtSlot,
+)
+
+
+class WorkerSignals(QObject):
+    """
+    Defines the signals available from a running worker thread.
+    """
+
+    finished = pyqtSignal()
+    error = pyqtSignal(tuple)
+    progress = pyqtSignal(int)
+    data = pyqtSignal(dict, list)
+    cancel = pyqtSignal()
+
+
+class UpdateWorker(QRunnable):
+    """
+    Worker thread for updating currency.
+    """
+
+    signals = WorkerSignals()
+
+    def __init__(self, base_currency):
+        super().__init__()
+        self.is_interrupted = False
+        self.base_currency = base_currency
+        self.signals.cancel.connect(self.cancel)
+
+    @pyqtSlot()
+    def run(self):
+        auth_header = {"Apikey": constants.CRYPTOCOMPARE_API_KEY}
+        try:
+            rates = {}
+            for n, crypto in enumerate(constants.AVAILABLE_CRYPTO_CURRENCIES, 1):
+                url = "https://min-api.cryptocompare.com/data/histoday?fsym={fsym}&tsym={tsym}&limit={limit}"
+                r = requests.get(
+                    url.format(
+                        **{
+                            "fsym": crypto,
+                            "tsym": self.base_currency,
+                            "limit": constants.NUMBER_OF_TIMEPOINTS - 1,
+                            "extraParams": "www.pythonguis.com",
+                            "format": "json",
+                        }
+                    ),
+                    headers=auth_header,
+                )
+                r.raise_for_status()
+                rates[crypto] = r.json().get("Data")
+
+                self.signals.progress.emit(int(100 * n / len(constants.AVAILABLE_CRYPTO_CURRENCIES)))
+
+                if self.is_interrupted:
+                    # Stop without emitting finish signals.
+                    return
+
+            url = "https://min-api.cryptocompare.com/data/exchange/histoday?tsym={tsym}&limit={limit}"
+            r = requests.get(
+                url.format(
+                    **{
+                        "tsym": self.base_currency,
+                        "limit": constants.NUMBER_OF_TIMEPOINTS - 1,
+                        "extraParams": "www.pythonguis.com",
+                        "format": "json",
+                    }
+                ),
+                headers=auth_header,
+            )
+            r.raise_for_status()
+            volume = [d["volume"] for d in r.json().get("Data")]
+
+        except Exception as e:
+            self.signals.error.emit((e, traceback.format_exc()))
+            return
+
+        self.signals.data.emit(rates, volume)
+        self.signals.finished.emit()
+
+    def cancel(self):
+        self.is_interrupted = True

pyqt6/demos/currency/README.md

@@ -0,0 +1,35 @@
+# Doughnut — An exchange rate tracker for people nuts about dough, in PyQt.
+
+This is a simple currency exchange rate tracker implemented in PyQt, using the [fixer.io](http://fixer.io) API
+for data. The default setup shows currency data for the preceding 180 days.
+
+![Doughnut](screenshot-currency1.jpg)
+
+Data is loaded progressively, with increasing resolution. Currency rates for a given date are shown in the right
+hand panel and updated to follow the position of the mouse.
+
+![Doughnut](screenshot-currency2.jpg)
+
+> If you want to learn more about build GUI applications with Python,
+take a look at my [PyQt5 tutorials](https://www.pythonguis.com)
+which covers everything you need to know to start building your own applications with PyQt5.
+
+## Code notes
+
+### Data handling
+
+The interface presents a tracking plot (using PyQtGraph) of rates over the past 180 days. Since we don't want to
+spam a free service, requests to the API are rate-limited to 1-per-second, giving a full-data-load time of 180s (3 min).
+
+To avoid waiting each time, we use `requests_cache` which uses a local sqlite database to store the result of recent
+requests. The requests for data use a progressive 'search' approach: where there is a gap in the data, the middle
+point is filled first, and it prefers to load the most recent timepoints first. This means the whole plot gradually
+increases in resolution over time, rather than working backwards only.
+
+### Conversions
+
+By default the app retrieves EUR rates and shows conversions to this base currency. If you change base currency
+it will retrieve all data again for that new currency. This is daft, since if we have rates vs. EUR we can calculate
+any other currency->currency conversion via EUR (with a small loss of accuracy).
+
+

pyqt6/demos/currency/constants.py

@@ -0,0 +1,31 @@
+# Base currency is used to retrieve rates from fixer.io.
+# If we change currency we re-request, though it would
+# be possible to calculate any rates *through* the base.
+DEFAULT_BASE_CURRENCY = "EUR"
+DEFAULT_DISPLAY_CURRENCIES = [
+    "CAD",
+    "CYP",
+    "AUD",
+    "USD",
+    "EUR",
+    "GBP",
+    "NZD",
+    "SGD",
+]
+HISTORIC_DAYS_N = 180
+
+# Colour sets.
+BREWER12PAIRED = [
+    "#a6cee3",
+    "#1f78b4",
+    "#b2df8a",
+    "#33a02c",
+    "#fb9a99",
+    "#e31a1c",
+    "#fdbf6f",
+    "#ff7f00",
+    "#cab2d6",
+    "#6a3d9a",
+    "#ffff99",
+    "#b15928",
+]

pyqt6/demos/currency/main.py

@@ -0,0 +1,353 @@
+import sys
+import time
+import traceback
+from collections import defaultdict
+from datetime import date, datetime, timedelta
+from itertools import cycle
+
+import constants
+import requests
+
+# import requests_cache
+from PyQt6.QtCore import (
+    QObject,
+    QRunnable,
+    Qt,
+    QThreadPool,
+    pyqtSignal,
+    pyqtSlot,
+)
+from PyQt6.QtGui import (
+    QBrush,
+    QColor,
+    QStandardItem,
+    QStandardItemModel,
+)
+from PyQt6.QtWidgets import (
+    QApplication,
+    QComboBox,
+    QHBoxLayout,
+    QMainWindow,
+    QProgressBar,
+    QTableView,
+    QToolBar,
+    QWidget,
+)
+
+color_cycle = cycle(constants.BREWER12PAIRED)
+
+# requests_cache.install_cache('cache')
+# PyQtGraph must be imported after Qt.
+import pyqtgraph as pg
+
+pg.setConfigOption("background", "w")
+pg.setConfigOption("foreground", "k")
+
+
+# Build progressive request order, for filling up data
+# Uses an depth-first search pattern, filling more recent data
+# to a higher resolution more quickly with a
+DATE_REQUEST_OFFSETS = [0]
+current = [(0, constants.HISTORIC_DAYS_N)]
+while current:
+    a, b = current.pop(0)
+    n = (a + b) // 2
+    DATE_REQUEST_OFFSETS.append(n)
+
+    if abs(a - n) > 1:
+        current.insert(0, (a, n))
+
+    if abs(b - n) > 1:
+        current.append((b, n))
+
+
+class WorkerSignals(QObject):
+    """
+    Defines the signals available from a running worker thread.
+    """
+
+    finished = pyqtSignal()
+    error = pyqtSignal(tuple)
+    progress = pyqtSignal(int)
+    data = pyqtSignal(int, dict)
+    cancel = pyqtSignal()
+
+
+class UpdateWorker(QRunnable):
+    """
+    Worker thread for updating currency.
+    """
+
+    signals = WorkerSignals()
+    is_interrupted = False
+
+    def __init__(self, base_currency):
+        super().__init__()
+        self.base_currency = base_currency
+        self.signals.cancel.connect(self.cancel)
+
+    @pyqtSlot()
+    def run(self):
+        try:
+            today = date.today()
+            total_requests = len(DATE_REQUEST_OFFSETS)
+
+            for n, offset in enumerate(DATE_REQUEST_OFFSETS, 1):
+                when = today - timedelta(days=offset)
+                url = "http://api.fixer.io/{}".format(when.isoformat())
+                r = requests.get(url, params={"base": self.base_currency})
+                r.raise_for_status()
+                data = r.json()
+                rates = data["rates"]
+                rates[self.base_currency] = 1.0
+
+                self.signals.data.emit(offset, rates)
+                self.signals.progress.emit(int(100 * n / total_requests))
+
+                if not r.from_cache:
+                    time.sleep(1)  # Don't be rude.
+
+                if self.is_interrupted:
+                    break
+
+        except Exception as e:
+            print(e)
+            exctype, value = sys.exc_info()[:2]
+            self.signals.error.emit((exctype, value, traceback.format_exc()))
+            return
+
+        self.signals.finished.emit()
+
+    def cancel(self):
+        self.is_interrupted = True
+
+
+class MainWindow(QMainWindow):
+    def __init__(self):
+        super().__init__()
+
+        layout = QHBoxLayout()
+
+        self.ax = pg.PlotWidget()
+        self.ax.showGrid(True, True)
+
+        self.line = pg.InfiniteLine(
+            pos=-20,
+            pen=pg.mkPen("k", width=3),
+            movable=False,  # We have our own code to handle dragless moving.
+        )
+
+        self.ax.addItem(self.line)
+        self.ax.setLimits(xMin=-constants.HISTORIC_DAYS_N + 1, xMax=0)
+        self.ax.getPlotItem().scene().sigMouseMoved.connect(self.mouse_move_handler)
+
+        self.base_currency = constants.DEFAULT_BASE_CURRENCY
+
+        # Store a reference to lines on the plot, and items in our
+        # data viewer we can update rather than redraw.
+        self._data_lines = dict()
+        self._data_items = dict()
+        self._data_colors = dict()
+        self._data_visible = constants.DEFAULT_DISPLAY_CURRENCIES
+
+        self._last_updated = None
+
+        self.listView = QTableView()
+        self.model = QStandardItemModel()
+        self.model.setHorizontalHeaderLabels(["Currency", "Rate"])
+        self.model.itemChanged.connect(self.check_check_state)
+
+        self.listView.setModel(self.model)
+
+        self.threadpool = QThreadPool()
+        self.worker = False
+
+        layout.addWidget(self.ax)
+        layout.addWidget(self.listView)
+
+        widget = QWidget()
+        widget.setLayout(layout)
+        self.setCentralWidget(widget)
+        self.listView.setFixedSize(226, 400)
+        self.setFixedSize(650, 400)
+
+        toolbar = QToolBar("Main")
+        self.addToolBar(toolbar)
+        self.currencyList = QComboBox()
+
+        toolbar.addWidget(self.currencyList)
+        self.update_currency_list(constants.DEFAULT_DISPLAY_CURRENCIES)
+        self.currencyList.setCurrentText(self.base_currency)
+        self.currencyList.currentTextChanged.connect(self.change_base_currency)
+
+        self.progress = QProgressBar()
+        self.progress.setRange(0, 100)
+        toolbar.addWidget(self.progress)
+
+        self.refresh_historic_rates()
+        self.setWindowTitle("Doughnut")
+        self.show()
+
+    def update_currency_list(self, currencies):
+        for currency in currencies:
+            if self.currencyList.findText(currency) == -1:
+                self.currencyList.addItem(currency)
+
+        self.currencyList.model().sort(0)
+
+    def check_check_state(self, i):
+        if not i.isCheckable():  # Skip data columns.
+            return
+
+        currency = i.text()
+        checked = i.checkState() == Qt.CheckState.Checked
+
+        if currency in self._data_visible:
+            if not checked:
+                self._data_visible.remove(currency)
+                self.redraw()
+        else:
+            if checked:
+                self._data_visible.append(currency)
+                self.redraw()
+
+    def get_currency_color(self, currency):
+        if currency not in self._data_colors:
+            self._data_colors[currency] = next(color_cycle)
+
+        return self._data_colors[currency]
+
+    def add_data_row(self, currency):
+        citem = QStandardItem()
+        citem.setText(currency)
+        citem.setForeground(QBrush(QColor(self.get_currency_color(currency))))
+        citem.setColumnCount(2)
+        citem.setCheckable(True)
+        if currency in constants.DEFAULT_DISPLAY_CURRENCIES:
+            citem.setCheckState(Qt.CheckState.Checked)
+
+        vitem = QStandardItem()
+
+        vitem.setTextAlignment(
+            Qt.AlignmentFlag.AlignRight | Qt.AlignmentFlag.AlignVCenter
+        )
+        self.model.setColumnCount(2)
+        self.model.appendRow([citem, vitem])
+        self.model.sort(0)
+        return citem, vitem
+
+    def get_or_create_data_row(self, currency):
+        if currency not in self._data_items:
+            self._data_items[currency] = self.add_data_row(currency)
+        return self._data_items[currency]
+
+    def mouse_move_handler(self, pos):
+        pos = self.ax.getViewBox().mapSceneToView(pos)
+        self.line.setPos(pos.x())
+        self.update_data_viewer(int(pos.x()))
+
+    def update_data_row(self, currency, value):
+        citem, vitem = self.get_or_create_data_row(currency)
+        vitem.setText("%.4f" % value)
+
+    def update_data_viewer(self, d):
+        try:
+            data = self.data[d]
+        except IndexError:  # Skip update if out of bounds.
+            return
+
+        if not data:  # Skip update if we have no data.
+            return
+
+        for k, v in data.items():
+            self.update_data_row(k, v)
+
+    def change_base_currency(self, currency):
+        self.base_currency = currency
+        self.refresh_historic_rates()
+
+    def refresh_historic_rates(self):
+        if self.worker:
+            # If we have a current worker, send a kill signal
+            self.worker.signals.cancel.emit()
+
+        # Prefill our data store with None ('no data')
+        self.data = [None] * constants.HISTORIC_DAYS_N
+
+        self.worker = UpdateWorker(self.base_currency)
+        # Handle callbacks with data and trigger refresh.
+        self.worker.signals.data.connect(self.result_data_callback)
+        self.worker.signals.finished.connect(self.refresh_finished)
+        self.worker.signals.progress.connect(self.progress_callback)
+        self.threadpool.start(self.worker)
+
+    def result_data_callback(self, n, rates):
+        self.data[n] = rates
+
+        # Refresh plot if we haven't for >1 second.
+        if (
+            self._last_updated is None
+            or self._last_updated < datetime.now() - timedelta(seconds=1)
+        ):
+            self.redraw()
+            self._last_updated = datetime.now()
+
+    def progress_callback(self, progress):
+        self.progress.setValue(progress)
+
+    def refresh_finished(self):
+        self.worker = False
+        self.redraw()
+        # Ensure all currencies we know about are in the dropdown list now.
+        self.update_currency_list(self._data_items.keys())
+
+    def redraw(self):
+        """
+        Process data from store and prefer to draw.
+        :return:
+        """
+        today = date.today()
+        plotd = defaultdict(list)
+        x_ticks = []
+
+        tick_step_size = constants.HISTORIC_DAYS_N / 6
+        # Pre-process data into lists of x, y values
+        for n, data in enumerate(self.data):
+            if data:
+                for currency, v in data.items():
+                    plotd[currency].append((-n, v))
+
+            when = today - timedelta(days=n)
+            if (n - tick_step_size // 2) % tick_step_size == 0:
+                x_ticks.append((-n, when.strftime("%d-%m")))
+
+        # Update the plot
+        keys = sorted(plotd.keys())
+        y_min, y_max = sys.maxsize, 0
+
+        for currency in keys:
+            x, y = zip(*plotd[currency])
+
+            if currency in self._data_visible:
+                y_min = min(y_min, *y)
+                y_max = max(y_max, *y)
+            else:
+                x, y = [], []
+
+            if currency in self._data_lines:
+                self._data_lines[currency].setData(x, y)
+            else:
+                self._data_lines[currency] = self.ax.plot(
+                    x,
+                    y,  # Unpack a list of tuples into two lists, passed as individual args.
+                    pen=pg.mkPen(self.get_currency_color(currency), width=2),
+                )
+
+        self.ax.setLimits(yMin=y_min * 0.9, yMax=y_max * 1.1)
+        self.ax.getAxis("bottom").setTicks([x_ticks, []])
+
+
+if __name__ == "__main__":
+    app = QApplication(sys.argv)
+    window = MainWindow()
+    app.exec()

pyqt6/demos/currency/requirements.txt

@@ -0,0 +1,4 @@
+PyQt5>=5.6
+requests>=2.0.0
+requests_cache>=0.4.13
+pyqtgraph>=0.10

pyqt6/demos/mediaplayer/MainWindow.py

@@ -0,0 +1,170 @@
+# -*- coding: utf-8 -*-
+
+# Form implementation generated from reading ui file 'mainwindow.ui'
+#
+# Created by: PyQt6 UI code generator 5.10
+#
+# WARNING! All changes made in this file will be lost!
+
+from PyQt6 import QtCore, QtGui, QtWidgets
+
+
+class Ui_MainWindow(object):
+    def setupUi(self, MainWindow):
+        MainWindow.setObjectName("MainWindow")
+        MainWindow.resize(484, 371)
+        self.centralWidget = QtWidgets.QWidget(MainWindow)
+        sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Maximum, QtWidgets.QSizePolicy.Maximum)
+        sizePolicy.setHorizontalStretch(0)
+        sizePolicy.setVerticalStretch(0)
+        sizePolicy.setHeightForWidth(self.centralWidget.sizePolicy().hasHeightForWidth())
+        self.centralWidget.setSizePolicy(sizePolicy)
+        self.centralWidget.setObjectName("centralWidget")
+        self.horizontalLayout = QtWidgets.QHBoxLayout(self.centralWidget)
+        self.horizontalLayout.setContentsMargins(11, 11, 11, 11)
+        self.horizontalLayout.setSpacing(6)
+        self.horizontalLayout.setObjectName("horizontalLayout")
+        self.verticalLayout = QtWidgets.QVBoxLayout()
+        self.verticalLayout.setSpacing(6)
+        self.verticalLayout.setObjectName("verticalLayout")
+        self.playlistView = QtWidgets.QListView(self.centralWidget)
+        self.playlistView.setAcceptDrops(True)
+        self.playlistView.setProperty("showDropIndicator", True)
+        self.playlistView.setDragDropMode(QtWidgets.QAbstractItemView.DropOnly)
+        self.playlistView.setAlternatingRowColors(True)
+        self.playlistView.setUniformItemSizes(True)
+        self.playlistView.setObjectName("playlistView")
+        self.verticalLayout.addWidget(self.playlistView)
+        self.horizontalLayout_4 = QtWidgets.QHBoxLayout()
+        self.horizontalLayout_4.setSpacing(6)
+        self.horizontalLayout_4.setObjectName("horizontalLayout_4")
+        self.currentTimeLabel = QtWidgets.QLabel(self.centralWidget)
+        self.currentTimeLabel.setMinimumSize(QtCore.QSize(80, 0))
+        self.currentTimeLabel.setAlignment(QtCore.Qt.AlignmentFlag.AlignRight | QtCore.Qt.AlignmentFlag.AlignTrailing | QtCore.Qt.AlignmentFlag.AlignVCenter)
+        self.currentTimeLabel.setObjectName("currentTimeLabel")
+        self.horizontalLayout_4.addWidget(self.currentTimeLabel)
+        self.timeSlider = QtWidgets.QSlider(self.centralWidget)
+        self.timeSlider.setOrientation(QtCore.Qt.Orientation.Horizontal)
+        self.timeSlider.setObjectName("timeSlider")
+        self.horizontalLayout_4.addWidget(self.timeSlider)
+        self.totalTimeLabel = QtWidgets.QLabel(self.centralWidget)
+        self.totalTimeLabel.setMinimumSize(QtCore.QSize(80, 0))
+        self.totalTimeLabel.setAlignment(QtCore.Qt.AlignmentFlag.AlignLeading | QtCore.Qt.AlignmentFlag.AlignLeft | QtCore.Qt.AlignmentFlag.AlignVCenter)
+        self.totalTimeLabel.setObjectName("totalTimeLabel")
+        self.horizontalLayout_4.addWidget(self.totalTimeLabel)
+        self.verticalLayout.addLayout(self.horizontalLayout_4)
+        self.horizontalLayout_5 = QtWidgets.QHBoxLayout()
+        self.horizontalLayout_5.setSpacing(6)
+        self.horizontalLayout_5.setObjectName("horizontalLayout_5")
+        self.previousButton = QtWidgets.QPushButton(self.centralWidget)
+        self.previousButton.setText("")
+        icon = QtGui.QIcon()
+        icon.addPixmap(
+            QtGui.QPixmap("images/control-skip-180.png"),
+            QtGui.QIcon.Normal,
+            QtGui.QIcon.Off,
+        )
+        self.previousButton.setIcon(icon)
+        self.previousButton.setObjectName("previousButton")
+        self.horizontalLayout_5.addWidget(self.previousButton)
+        self.playButton = QtWidgets.QPushButton(self.centralWidget)
+        self.playButton.setText("")
+        icon1 = QtGui.QIcon()
+        icon1.addPixmap(
+            QtGui.QPixmap("images/control.png"),
+            QtGui.QIcon.Normal,
+            QtGui.QIcon.Off,
+        )
+        self.playButton.setIcon(icon1)
+        self.playButton.setObjectName("playButton")
+        self.horizontalLayout_5.addWidget(self.playButton)
+        self.pauseButton = QtWidgets.QPushButton(self.centralWidget)
+        self.pauseButton.setText("")
+        icon2 = QtGui.QIcon()
+        icon2.addPixmap(
+            QtGui.QPixmap("images/control-pause.png"),
+            QtGui.QIcon.Normal,
+            QtGui.QIcon.Off,
+        )
+        self.pauseButton.setIcon(icon2)
+        self.pauseButton.setObjectName("pauseButton")
+        self.horizontalLayout_5.addWidget(self.pauseButton)
+        self.stopButton = QtWidgets.QPushButton(self.centralWidget)
+        self.stopButton.setText("")
+        icon3 = QtGui.QIcon()
+        icon3.addPixmap(
+            QtGui.QPixmap("images/control-stop-square.png"),
+            QtGui.QIcon.Normal,
+            QtGui.QIcon.Off,
+        )
+        self.stopButton.setIcon(icon3)
+        self.stopButton.setObjectName("stopButton")
+        self.horizontalLayout_5.addWidget(self.stopButton)
+        self.nextButton = QtWidgets.QPushButton(self.centralWidget)
+        self.nextButton.setText("")
+        icon4 = QtGui.QIcon()
+        icon4.addPixmap(
+            QtGui.QPixmap("images/control-skip.png"),
+            QtGui.QIcon.Normal,
+            QtGui.QIcon.Off,
+        )
+        self.nextButton.setIcon(icon4)
+        self.nextButton.setObjectName("nextButton")
+        self.horizontalLayout_5.addWidget(self.nextButton)
+        self.viewButton = QtWidgets.QPushButton(self.centralWidget)
+        self.viewButton.setText("")
+        icon5 = QtGui.QIcon()
+        icon5.addPixmap(
+            QtGui.QPixmap("images/application-image.png"),
+            QtGui.QIcon.Normal,
+            QtGui.QIcon.Off,
+        )
+        self.viewButton.setIcon(icon5)
+        self.viewButton.setCheckable(True)
+        self.viewButton.setObjectName("viewButton")
+        self.horizontalLayout_5.addWidget(self.viewButton)
+        spacerItem = QtWidgets.QSpacerItem(
+            40,
+            20,
+            QtWidgets.QSizePolicy.Expanding,
+            QtWidgets.QSizePolicy.Minimum,
+        )
+        self.horizontalLayout_5.addItem(spacerItem)
+        self.label = QtWidgets.QLabel(self.centralWidget)
+        self.label.setText("")
+        self.label.setPixmap(QtGui.QPixmap("images/speaker-volume.png"))
+        self.label.setObjectName("label")
+        self.horizontalLayout_5.addWidget(self.label)
+        self.volumeSlider = QtWidgets.QSlider(self.centralWidget)
+        self.volumeSlider.setMaximum(100)
+        self.volumeSlider.setProperty("value", 100)
+        self.volumeSlider.setOrientation(QtCore.Qt.Orientation.Horizontal)
+        self.volumeSlider.setObjectName("volumeSlider")
+        self.horizontalLayout_5.addWidget(self.volumeSlider)
+        self.verticalLayout.addLayout(self.horizontalLayout_5)
+        self.horizontalLayout.addLayout(self.verticalLayout)
+        MainWindow.setCentralWidget(self.centralWidget)
+        self.menuBar = QtWidgets.QMenuBar(MainWindow)
+        self.menuBar.setGeometry(QtCore.QRect(0, 0, 484, 22))
+        self.menuBar.setObjectName("menuBar")
+        self.menuFIle = QtWidgets.QMenu(self.menuBar)
+        self.menuFIle.setObjectName("menuFIle")
+        MainWindow.setMenuBar(self.menuBar)
+        self.statusBar = QtWidgets.QStatusBar(MainWindow)
+        self.statusBar.setObjectName("statusBar")
+        MainWindow.setStatusBar(self.statusBar)
+        self.open_file_action = QtWidgets.QAction(MainWindow)
+        self.open_file_action.setObjectName("open_file_action")
+        self.menuFIle.addAction(self.open_file_action)
+        self.menuBar.addAction(self.menuFIle.menuAction())
+
+        self.retranslateUi(MainWindow)
+        QtCore.QMetaObject.connectSlotsByName(MainWindow)
+
+    def retranslateUi(self, MainWindow):
+        _translate = QtCore.QCoreApplication.translate
+        MainWindow.setWindowTitle(_translate("MainWindow", "Failamp"))
+        self.currentTimeLabel.setText(_translate("MainWindow", "0:00"))
+        self.totalTimeLabel.setText(_translate("MainWindow", "0:00"))
+        self.menuFIle.setTitle(_translate("MainWindow", "FIle"))
+        self.open_file_action.setText(_translate("MainWindow", "Open file..."))

pyqt6/demos/mediaplayer/README.md

@@ -0,0 +1,20 @@
+# Failamp — Simple mediaplayer build in PyQt
+
+Simple app to listen to and watch videos and audio files,
+with built in playlist. Uses QtMultimedia and QtMultimediaWidgets
+to handle playback and manage the playlist.
+
+The main interface offers a playlist window in which you can drag-drop
+media files to be played. Standard media controls are provided, along
+with a timeline scrub widget and a volume control.
+
+![Mediaplayer](screenshot-mediaplayer1.jpg)
+
+For video playback you can pop out an external video viewer window
+which floats on top.
+
+![Mediaplayer](screenshot-mediaplayer2.jpg)
+
+> If you want to learn more about build GUI applications with Python,
+take a look at my [PyQt5 tutorials](https://www.pythonguis.com)
+which covers everything you need to know to start building your own applications with PyQt5.

pyqt6/demos/mediaplayer/main.py

@@ -0,0 +1,170 @@
+import os
+import sys
+
+from MainWindow import Ui_MainWindow
+from models import PlaylistModel
+from PyQt6.QtCore import QSize, Qt, QUrl, pyqtSignal
+from PyQt6.QtGui import QColor, QPalette
+from PyQt6.QtMultimedia import (
+    QMediaContent,
+    QMediaPlayer,
+    QMediaPlaylist,
+)
+from PyQt6.QtMultimediaWidgets import QVideoWidget
+from PyQt6.QtWidgets import QApplication, QFileDialog, QMainWindow
+from utils import hhmmss
+
+
+class ViewerWindow(QMainWindow):
+    state = pyqtSignal(bool)
+
+    def closeEvent(self, e):
+        # Emit the window state, to update the viewer toggle button.
+        self.state.emit(False)
+
+
+class MainWindow(QMainWindow, Ui_MainWindow):
+    def __init__(self):
+        super().__init__()
+        self.setupUi(self)
+
+        self.player = QMediaPlayer()
+
+        self.player.error.connect(self.erroralert)
+        self.player.play()
+
+        # Setup the playlist.
+        self.playlist = QMediaPlaylist()
+        self.player.setPlaylist(self.playlist)
+
+        # Add viewer for video playback, separate floating window.
+        self.viewer = ViewerWindow(self)
+        self.viewer.setWindowFlags(
+            self.viewer.windowFlags() | Qt.WindowType.WindowStaysOnTopHint
+        )
+        self.viewer.setMinimumSize(QSize(480, 360))
+
+        videoWidget = QVideoWidget()
+        self.viewer.setCentralWidget(videoWidget)
+        self.player.setVideoOutput(videoWidget)
+
+        # Connect control buttons/slides for media player.
+        self.playButton.pressed.connect(self.player.play)
+        self.pauseButton.pressed.connect(self.player.pause)
+        self.stopButton.pressed.connect(self.player.stop)
+        self.volumeSlider.valueChanged.connect(self.player.setVolume)
+
+        self.viewButton.toggled.connect(self.toggle_viewer)
+        self.viewer.state.connect(self.viewButton.setChecked)
+
+        self.previousButton.pressed.connect(self.playlist.previous)
+        self.nextButton.pressed.connect(self.playlist.next)
+
+        self.model = PlaylistModel(self.playlist)
+        self.playlistView.setModel(self.model)
+        self.playlist.currentIndexChanged.connect(self.playlist_position_changed)
+        selection_model = self.playlistView.selectionModel()
+        selection_model.selectionChanged.connect(self.playlist_selection_changed)
+
+        self.player.durationChanged.connect(self.update_duration)
+        self.player.positionChanged.connect(self.update_position)
+        self.timeSlider.valueChanged.connect(self.player.setPosition)
+
+        self.open_file_action.triggered.connect(self.open_file)
+
+        self.setAcceptDrops(True)
+
+        self.show()
+
+    def dragEnterEvent(self, e):
+        if e.mimeData().hasUrls():
+            e.acceptProposedAction()
+
+    def dropEvent(self, e):
+        for url in e.mimeData().urls():
+            self.playlist.addMedia(QMediaContent(url))
+
+        self.model.layoutChanged.emit()
+
+        # If not playing, seeking to first of newly added + play.
+        if self.player.state() != QMediaPlayer.PlaybackState.PlayingState:
+            i = self.playlist.mediaCount() - len(e.mimeData().urls())
+            self.playlist.setCurrentIndex(i)
+            self.player.play()
+
+    def open_file(self):
+        path, _ = QFileDialog.getOpenFileName(
+            self,
+            "Open file",
+            "",
+            "mp3 Audio (*.mp3);;mp4 Video (*.mp4);;Movie files (*.mov);;All files (*.*)",
+        )
+
+        if path:
+            self.playlist.addMedia(QMediaContent(QUrl.fromLocalFile(path)))
+
+        self.model.layoutChanged.emit()
+
+    def update_duration(self, duration):
+        self.timeSlider.setMaximum(duration)
+
+        if duration >= 0:
+            self.totalTimeLabel.setText(hhmmss(duration))
+
+    def update_position(self, position):
+        if position >= 0:
+            self.currentTimeLabel.setText(hhmmss(position))
+
+        # Disable the events to prevent updating triggering a setPosition event (can cause stuttering).
+        self.timeSlider.blockSignals(True)
+        self.timeSlider.setValue(position)
+        self.timeSlider.blockSignals(False)
+
+    def playlist_selection_changed(self, ix):
+        # We receive a QItemSelection from selectionChanged.
+        i = ix.indexes()[0].row()
+        self.playlist.setCurrentIndex(i)
+
+    def playlist_position_changed(self, i):
+        if i > -1:
+            ix = self.model.index(i)
+            self.playlistView.setCurrentIndex(ix)
+
+    def toggle_viewer(self, state):
+        if state:
+            self.viewer.show()
+        else:
+            self.viewer.hide()
+
+    def erroralert(self, *args):
+        print(args)
+
+
+if __name__ == "__main__":
+    os.environ["QT_MULTIMEDIA_PREFERRED_PLUGINS"] = "windowsmediafoundation"
+    app = QApplication(sys.argv)
+    app.setApplicationName("Failamp")
+    app.setStyle("Fusion")
+
+    # Fusion dark palette from https://gist.github.com/QuantumCD/6245215.
+    palette = QPalette()
+    palette.setColor(QPalette.ColorRole.Window, QColor(53, 53, 53))
+    palette.setColor(QPalette.ColorRole.WindowText, Qt.GlobalColor.white)
+    palette.setColor(QPalette.ColorRole.Base, QColor(25, 25, 25))
+    palette.setColor(QPalette.ColorRole.AlternateBase, QColor(53, 53, 53))
+    palette.setColor(QPalette.ColorRole.ToolTipBase, Qt.GlobalColor.white)
+    palette.setColor(QPalette.ColorRole.ToolTipText, Qt.GlobalColor.white)
+    palette.setColor(QPalette.ColorRole.Text, Qt.GlobalColor.white)
+    palette.setColor(QPalette.ColorRole.Button, QColor(53, 53, 53))
+    palette.setColor(QPalette.ColorRole.ButtonText, Qt.GlobalColor.white)
+    palette.setColor(QPalette.ColorRole.BrightText, Qt.GlobalColor.red)
+    palette.setColor(QPalette.ColorRole.Link, QColor(42, 130, 218))
+    palette.setColor(QPalette.ColorRole.Highlight, QColor(42, 130, 218))
+    palette.setColor(QPalette.ColorRole.HighlightedText, Qt.GlobalColor.black)
+    app.setPalette(palette)
+    app.setStyleSheet(
+        "QToolTip { color: #ffffff; background-color: #2a82da; border: 1px solid white; }"
+    )
+
+    window = MainWindow()
+    app.exec()

pyqt6/demos/mediaplayer/mainwindow.ui

@@ -0,0 +1,63 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<ui version="4.0">
+ <class>MainWindow</class>
+ <widget class="QMainWindow" name="MainWindow">
+  <property name="geometry">
+   <rect>
+    <x>0</x>
+    <y>0</y>
+    <width>484</width>
+    <height>371</height>
+   </rect>
+  </property>
+  <property name="windowTitle">
+   <string>Failamp</string>
+  </property>
+  <widget class="QWidget" name="centralWidget">
+   <property name="sizePolicy">
+    <sizepolicy hsizetype="Maximum" vsizetype="Maximum">
+     <horstretch>0</horstretch>
+     <verstretch>0</verstretch>
+    </sizepolicy>
+   </property>
+   <layout class="QVBoxLayout" name="verticalLayout">
+    <item>
+     <widget class="QWidget" name="widget" native="true">
+      <layout class="QVBoxLayout" name="verticalLayout_2">
+       <item>
+        <widget class="QLabel" name="label">
+         <property name="text">
+          <string>TextLabel</string>
+         </property>
+        </widget>
+       </item>
+       <item>
+        <widget class="QLabel" name="label_2">
+         <property name="text">
+          <string>TextLabel</string>
+         </property>
+        </widget>
+       </item>
+       <item>
+        <widget class="QLabel" name="label_3">
+         <property name="text">
+          <string>TextLabel</string>
+         </property>
+        </widget>
+       </item>
+      </layout>
+     </widget>
+    </item>
+   </layout>
+  </widget>
+  <widget class="QStatusBar" name="statusBar"/>
+  <action name="open_file_action">
+   <property name="text">
+    <string>Open file...</string>
+   </property>
+  </action>
+ </widget>
+ <layoutdefault spacing="6" margin="11"/>
+ <resources/>
+ <connections/>
+</ui>

pyqt6/demos/mediaplayer/models.py

@@ -0,0 +1,15 @@
+from PyQt6.QtCore import QAbstractListModel, Qt
+
+
+class PlaylistModel(QAbstractListModel):
+    def __init__(self, playlist):
+        super().__init__()
+        self.playlist = playlist
+
+    def data(self, index, role):
+        if role == Qt.ItemDataRole.DisplayRole:
+            media = self.playlist.media(index.row())
+            return media.canonicalUrl().fileName()
+
+    def rowCount(self, index):
+        return self.playlist.mediaCount()

pyqt6/demos/mediaplayer/requirements.txt

@@ -0,0 +1 @@
+PyQt5>=5.6

pyqt6/demos/mediaplayer/utils.py

@@ -0,0 +1,8 @@
+def hhmmss(ms):
+    # s = 1000
+    # m = 60000
+    # h = 360000
+    s = round(ms / 1000)
+    m, s = divmod(s, 60)
+    h, m = divmod(m, 60)
+    return ("%d:%02d:%02d" % (h, m, s)) if h else ("%d:%02d" % (m, s))

pyqt6/demos/minesweeper/README.md

@@ -0,0 +1,39 @@
+# Moonsweeper — A minesweeper clone, on a moon with aliens, in PyQt.
+
+Explore the mysterious moon of Q'tee without getting too close to the alien natives!
+
+Moonsweeper is a single-player puzzle video game. The objective of the game is to
+explore the area around your landed space rocket, without coming too close to the
+deadly B'ug aliens. Your trusty tricounter will tell you the number of B'ugs in the
+vicinity.
+
+![Moonsweeper](screenshot-minesweeper1.jpg)
+
+This a simple single-player exploration game modelled on _Minesweeper_
+where you must reveal all the tiles without hitting hidden mines.
+This implementation uses custom `QWidget` objects for the tiles, which
+individually hold their state as mines, status and the
+adjacent count of mines. In this version, the mines are replaced with
+alien bugs (B'ug) but they could just as easily be anything else.
+
+![Moonsweeper](screenshot-minesweeper2.jpg)
+
+> If you want to learn more about build GUI applications with Python,
+take a look at my [PyQt5 tutorials](https://www.pythonguis.com)
+which covers everything you need to know to start building your own applications with PyQt5.
+
+## Code notes
+
+### Cheating the first turn
+
+In many *Minesweeper* variants the initial turn is considered a free
+go — if you hit a mine on the first click, it is moved somewhere else.
+Here we cheat a little bit by taking the first go for the player, ensuring that
+it is on a non-mine spot. This allows us not to worry about the bad first move
+which would require us to recalculate the adjacencies.
+We can explain this away as the "initial exploration around the rocket"
+and make it sound completely sensible.
+
+## Other licenses
+
+Icons used in the application are by [Yusuke Kamiyaman](http://p.yusukekamiyamane.com/).

pyqt6/demos/minesweeper/constants.py

@@ -0,0 +1,39 @@
+from enum import IntEnum
+
+from PyQt6.QtGui import (
+    QColor,
+    QImage,
+)
+
+IMG_BOMB = QImage("./images/bug.png")
+IMG_FLAG = QImage("./images/flag.png")
+IMG_START = QImage("./images/rocket.png")
+IMG_CLOCK = QImage("./images/clock-select.png")
+
+NUM_COLORS = {
+    1: QColor("#f44336"),
+    2: QColor("#9C27B0"),
+    3: QColor("#3F51B5"),
+    4: QColor("#03A9F4"),
+    5: QColor("#00BCD4"),
+    6: QColor("#4CAF50"),
+    7: QColor("#E91E63"),
+    8: QColor("#FF9800"),
+}
+
+LEVELS = [(8, 10), (16, 40), (24, 99)]
+
+
+class Status(IntEnum):
+    READY = 0
+    PLAYING = 1
+    FAILED = 2
+    SUCCESS = 3
+
+
+STATUS_ICONS = {
+    Status.READY: "./images/plus.png",
+    Status.PLAYING: "./images/smiley.png",
+    Status.FAILED: "./images/cross.png",
+    Status.SUCCESS: "./images/smiley-lol.png",
+}