彻底改版2.0

other/bgdemo/widget.cpp

@@ -0,0 +1,56 @@
+#include "widget.h"
+#include "ui_widget.h"
+#include "qevent.h"
+#include "qdebug.h"
+
+Widget::Widget(QWidget *parent) : QWidget(parent), ui(new Ui::Widget)
+{
+    ui->setupUi(this);
+
+    this->setAttribute(Qt::WA_TranslucentBackground);
+    this->setWindowFlags(Qt::FramelessWindowHint | Qt::WindowSystemMenuHint | Qt::WindowMinimizeButtonHint);
+    ui->widget->installEventFilter(this);
+    ui->widget->setStyleSheet(QString("background-image:url(:/image/%1.png);").arg(1));
+}
+
+Widget::~Widget()
+{
+    delete ui;
+}
+
+bool Widget::eventFilter(QObject *watched, QEvent *evt)
+{
+    static int index = 1;
+    static QPoint mousePoint;
+    static bool mousePressed = false;
+
+    QMouseEvent *event = static_cast<QMouseEvent *>(evt);
+    if (event->type() == QEvent::MouseButtonPress) {
+        if (event->button() == Qt::LeftButton) {
+            mousePressed = true;
+            mousePoint = event->globalPos() - this->pos();
+
+            if (index == 5) {
+                index = 1;
+            } else {
+                index++;
+            }
+
+            ui->widget->setStyleSheet(QString("background-image:url(:/image/%1.png);").arg(index));
+
+            return true;
+        } else {
+            exit(0);
+        }
+    } else if (event->type() == QEvent::MouseButtonRelease) {
+        mousePressed = false;
+        return true;
+    } else if (event->type() == QEvent::MouseMove) {
+        if (mousePressed && (event->buttons() && Qt::LeftButton)) {
+            this->move(event->globalPos() - mousePoint);
+            return true;
+        }
+    }
+
+    return QWidget::eventFilter(watched, event);
+}