彻底改版2.0

third/designer/lib/shared/newformwidget.cpp

@@ -0,0 +1,586 @@
+/****************************************************************************
+**
+** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the Qt Designer of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** Commercial Usage
+** Licensees holding valid Qt Commercial licenses may use this file in
+** accordance with the Qt Commercial License Agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and Nokia.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain additional
+** rights.  These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "newformwidget_p.h"
+#include "ui_newformwidget.h"
+#include "qdesigner_formbuilder_p.h"
+#include "sheet_delegate_p.h"
+#include "widgetdatabase_p.h"
+#include "shared_settings_p.h"
+
+#include <QtDesigner/QDesignerFormEditorInterface>
+#include <QtDesigner/QDesignerFormWindowInterface>
+#include <QtDesigner/QExtensionManager>
+#include <QtDesigner/QDesignerLanguageExtension>
+#include <QtDesigner/QDesignerWidgetDataBaseInterface>
+
+#include <QtCore/QDir>
+#include <QtCore/QFile>
+#include <QtCore/QFileInfo>
+#include <QtCore/QDebug>
+#include <QtCore/QByteArray>
+#include <QtCore/QBuffer>
+#include <QtCore/QDir>
+#include <QtCore/QTextStream>
+
+#include <QtGui/QHeaderView>
+#include <QtGui/QTreeWidgetItem>
+#include <QtGui/QPainter>
+#include <QtGui/QPushButton>
+
+QT_BEGIN_NAMESPACE
+
+enum { profileComboIndexOffset = 1 };
+enum { debugNewFormWidget = 0 };
+
+enum NewForm_CustomRole {
+    // File name (templates from resources, paths)
+    TemplateNameRole = Qt::UserRole + 100,
+    // Class name (widgets from Widget data base)
+    ClassNameRole = Qt::UserRole + 101
+};
+
+static const char *newFormObjectNameC = "Form";
+
+// Create a form name for an arbitrary class. If it is Qt, qtify it,
+//  else return "Form".
+static QString formName(const QString &className)
+{
+    if (!className.startsWith(QLatin1Char('Q')))
+        return QLatin1String(newFormObjectNameC);
+    QString rc = className;
+    rc.remove(0, 1);
+    return rc;
+}
+
+namespace qdesigner_internal {
+
+struct TemplateSize {
+    const char *name;
+    int width;
+    int height;
+};
+
+static const struct TemplateSize templateSizes[] =
+{
+    { QT_TRANSLATE_NOOP("qdesigner_internal::NewFormWidget", "Default size"), 0, 0 },
+    { QT_TRANSLATE_NOOP("qdesigner_internal::NewFormWidget", "QVGA portrait (240x320)"), 240, 320  },
+    { QT_TRANSLATE_NOOP("qdesigner_internal::NewFormWidget", "QVGA landscape (320x240)"), 320, 240 },
+    { QT_TRANSLATE_NOOP("qdesigner_internal::NewFormWidget", "VGA portrait (480x640)"), 480, 640 },
+    { QT_TRANSLATE_NOOP("qdesigner_internal::NewFormWidget", "VGA landscape (640x480)"), 640, 480 }
+};
+
+/* -------------- NewForm dialog.
+ * Designer takes new form templates from:
+ * 1) Files located in directories specified in resources
+ * 2) Files located in directories specified as user templates
+ * 3) XML from container widgets deemed usable for form templates by the widget
+ *    database
+ * 4) XML from custom container widgets deemed usable for form templates by the
+ *    widget database
+ *
+ * The widget database provides helper functions to obtain lists of names
+ * and xml for 3,4.
+ *
+ * Fixed-size forms for embedded platforms are obtained as follows:
+ * 1) If the origin is a file:
+ *    - Check if the file exists in the subdirectory "/<width>x<height>/" of
+ *      the path (currently the case for the dialog box because the button box
+ *      needs to be positioned)
+ *    - Scale the form using the QWidgetDatabase::scaleFormTemplate routine.
+ * 2) If the origin is XML:
+ *     - Scale the form using the QWidgetDatabase::scaleFormTemplate routine.
+ *
+ * The tree widget item roles indicate which type of entry it is
+ * (TemplateNameRole = file name 1,2, ClassNameRole = class name 3,4)
+ */
+
+NewFormWidget::NewFormWidget(QDesignerFormEditorInterface *core, QWidget *parentWidget) :
+    QDesignerNewFormWidgetInterface(parentWidget),
+    m_core(core),
+    m_ui(new Ui::NewFormWidget),
+    m_currentItem(0),
+    m_acceptedItem(0)
+{
+    typedef QList<qdesigner_internal::DeviceProfile> DeviceProfileList;
+
+    m_ui->setupUi(this);
+    m_ui->treeWidget->setItemDelegate(new qdesigner_internal::SheetDelegate(m_ui->treeWidget, this));
+    m_ui->treeWidget->header()->hide();
+    m_ui->treeWidget->header()->setStretchLastSection(true);
+    m_ui->lblPreview->setBackgroundRole(QPalette::Base);
+    QDesignerSharedSettings settings(m_core);
+
+    QString uiExtension = QLatin1String("ui");
+    QString templatePath = QLatin1String(":/trolltech/designer/templates/forms");
+
+    QDesignerLanguageExtension *lang = qt_extension<QDesignerLanguageExtension *>(core->extensionManager(), core);
+    if (lang) {
+        templatePath = QLatin1String(":/templates/forms");
+        uiExtension = lang->uiExtension();
+    }
+
+    // Resource templates
+    const QString formTemplate = settings.formTemplate();
+    QTreeWidgetItem *selectedItem = 0;
+    loadFrom(templatePath, true, uiExtension, formTemplate, selectedItem);
+    // Additional template paths
+    const QStringList formTemplatePaths = settings.formTemplatePaths();
+    const QStringList::const_iterator ftcend = formTemplatePaths.constEnd();
+    for (QStringList::const_iterator it = formTemplatePaths.constBegin(); it != ftcend; ++it)
+        loadFrom(*it, false, uiExtension, formTemplate, selectedItem);
+
+    // Widgets/custom widgets
+    if (!lang) {
+        //: New Form Dialog Categories
+        loadFrom(tr("Widgets"), qdesigner_internal::WidgetDataBase::formWidgetClasses(core), formTemplate, selectedItem);
+        loadFrom(tr("Custom Widgets"), qdesigner_internal::WidgetDataBase::customFormWidgetClasses(core), formTemplate, selectedItem);
+    }
+
+    // Still no selection - default to first item
+    if (selectedItem == 0 && m_ui->treeWidget->topLevelItemCount() != 0) {
+        QTreeWidgetItem *firstTopLevel = m_ui->treeWidget->topLevelItem(0);
+        if (firstTopLevel->childCount() > 0)
+            selectedItem = firstTopLevel->child(0);
+    }
+
+    // Open parent, select and make visible
+    if (selectedItem) {
+        m_ui->treeWidget->setCurrentItem(selectedItem);
+        m_ui->treeWidget->setItemSelected(selectedItem, true);
+        m_ui->treeWidget->scrollToItem(selectedItem->parent());
+    }
+    // Fill profile combo
+    m_deviceProfiles = settings.deviceProfiles();
+    m_ui->profileComboBox->addItem(tr("None"));
+    connect(m_ui->profileComboBox, SIGNAL(currentIndexChanged(int)), this, SLOT(slotDeviceProfileIndexChanged(int)));
+    if (m_deviceProfiles.empty()) {
+        m_ui->profileComboBox->setEnabled(false);
+    } else {
+        const DeviceProfileList::const_iterator dcend = m_deviceProfiles.constEnd();
+        for (DeviceProfileList::const_iterator it = m_deviceProfiles.constBegin(); it != dcend; ++it)
+            m_ui->profileComboBox->addItem(it->name());
+        const int ci = settings.currentDeviceProfileIndex();
+        if (ci >= 0)
+            m_ui->profileComboBox->setCurrentIndex(ci + profileComboIndexOffset);
+    }
+    // Fill size combo
+    const int sizeCount =  sizeof(templateSizes)/ sizeof(TemplateSize);
+    for (int i = 0; i < sizeCount; i++) {
+        const QSize size = QSize(templateSizes[i].width, templateSizes[i].height);
+        m_ui->sizeComboBox->addItem(tr(templateSizes[i].name), size);
+    }
+
+    setTemplateSize(settings.newFormSize());
+
+    if (debugNewFormWidget)
+        qDebug() << Q_FUNC_INFO << "Leaving";
+}
+
+NewFormWidget::~NewFormWidget()
+{
+    QDesignerSharedSettings settings (m_core);
+    settings.setNewFormSize(templateSize());
+    // Do not change previously stored item if dialog was rejected
+    if (m_acceptedItem)
+        settings.setFormTemplate(m_acceptedItem->text(0));
+    delete m_ui;
+}
+
+void NewFormWidget::on_treeWidget_currentItemChanged(QTreeWidgetItem *current, QTreeWidgetItem *)
+{
+    if (debugNewFormWidget)
+        qDebug() << Q_FUNC_INFO << current;
+    if (!current)
+        return;
+
+    if (!current->parent()) { // Top level item: Ensure expanded when browsing down
+        return;
+    }
+
+    m_currentItem = current;
+
+    emit currentTemplateChanged(showCurrentItemPixmap());
+}
+
+bool NewFormWidget::showCurrentItemPixmap()
+{
+    bool rc = false;
+    if (m_currentItem) {
+        const QPixmap pixmap = formPreviewPixmap(m_currentItem);
+        if (pixmap.isNull()) {
+            m_ui->lblPreview->setText(tr("Error loading form"));
+        } else {
+            m_ui->lblPreview->setPixmap(pixmap);
+            rc = true;
+        }
+    }
+    return rc;
+}
+
+void NewFormWidget::on_treeWidget_itemActivated(QTreeWidgetItem *item)
+{
+    if (debugNewFormWidget)
+        qDebug() << Q_FUNC_INFO << item;
+
+    if (item->data(0, TemplateNameRole).isValid() || item->data(0, ClassNameRole).isValid())
+        emit templateActivated();
+}
+
+QPixmap  NewFormWidget::formPreviewPixmap(const QTreeWidgetItem *item)
+{
+    // Cache pixmaps per item/device profile
+    const ItemPixmapCacheKey cacheKey(item, profileComboIndex());
+    ItemPixmapCache::iterator it = m_itemPixmapCache.find(cacheKey);
+    if (it == m_itemPixmapCache.end()) {
+        // file or string?
+        const QVariant fileName = item->data(0, TemplateNameRole);
+        QPixmap rc;
+        if (fileName.type() == QVariant::String) {
+            rc = formPreviewPixmap(fileName.toString());
+        } else {
+            const QVariant classNameV = item->data(0, ClassNameRole);
+            Q_ASSERT(classNameV.type() == QVariant::String);
+            const QString className = classNameV.toString();
+            QByteArray data =  qdesigner_internal::WidgetDataBase::formTemplate(m_core, className, formName(className)).toUtf8();
+            QBuffer buffer(&data);
+            buffer.open(QIODevice::ReadOnly);
+            rc = formPreviewPixmap(buffer);
+        }
+        if (rc.isNull()) // Retry invalid ones
+            return rc;
+        it = m_itemPixmapCache.insert(cacheKey, rc);
+    }
+    return it.value();
+}
+
+QPixmap NewFormWidget::formPreviewPixmap(const QString &fileName) const
+{
+    QFile f(fileName);
+    if (f.open(QFile::ReadOnly)) {
+        QFileInfo fi(fileName);
+        const QPixmap rc = formPreviewPixmap(f, fi.absolutePath());
+        f.close();
+        return rc;
+    }
+    qWarning() << "The file " << fileName << " could not be opened: " << f.errorString();
+    return QPixmap();
+}
+
+QImage NewFormWidget::grabForm(QDesignerFormEditorInterface *core,
+                         QIODevice &file,
+                         const QString &workingDir,
+                         const qdesigner_internal::DeviceProfile &dp)
+{
+    qdesigner_internal::NewFormWidgetFormBuilder
+        formBuilder(core, qdesigner_internal::QDesignerFormBuilder::DisableScripts, dp);
+    if (!workingDir.isEmpty())
+        formBuilder.setWorkingDirectory(workingDir);
+
+    QWidget *widget = formBuilder.load(&file, 0);
+    if (!widget)
+        return QImage();
+
+    const QPixmap pixmap = QPixmap::grabWidget(widget);
+    widget->deleteLater();
+    return pixmap.toImage();
+}
+
+QPixmap NewFormWidget::formPreviewPixmap(QIODevice &file, const QString &workingDir) const
+{
+    const int margin = 7;
+    const int shadow = 7;
+    const int previewSize = 256;
+
+    const QImage wimage = grabForm(m_core, file, workingDir,  currentDeviceProfile());
+    if (wimage.isNull())
+        return QPixmap();
+    const QImage image =  wimage.scaled(previewSize - margin * 2, previewSize - margin * 2,
+                                        Qt::KeepAspectRatio,
+                                        Qt::SmoothTransformation);
+
+    QImage dest(previewSize, previewSize, QImage::Format_ARGB32_Premultiplied);
+    dest.fill(0);
+
+    QPainter p(&dest);
+    p.drawImage(margin, margin, image);
+
+    p.setPen(QPen(palette().brush(QPalette::WindowText), 0));
+
+    p.drawRect(margin-1, margin-1, image.width() + 1, image.height() + 1);
+
+    const QColor dark(Qt::darkGray);
+    const QColor light(Qt::transparent);
+
+    // right shadow
+    {
+        const QRect rect(margin + image.width() + 1, margin + shadow, shadow, image.height() - shadow + 1);
+        QLinearGradient lg(rect.topLeft(), rect.topRight());
+        lg.setColorAt(0, dark);
+        lg.setColorAt(1, light);
+        p.fillRect(rect, lg);
+    }
+
+    // bottom shadow
+    {
+        const QRect rect(margin + shadow, margin + image.height() + 1, image.width() - shadow + 1, shadow);
+        QLinearGradient lg(rect.topLeft(), rect.bottomLeft());
+        lg.setColorAt(0, dark);
+        lg.setColorAt(1, light);
+        p.fillRect(rect, lg);
+    }
+
+    // bottom/right corner shadow
+    {
+        const QRect rect(margin + image.width() + 1, margin + image.height() + 1, shadow, shadow);
+        QRadialGradient g(rect.topLeft(), shadow);
+        g.setColorAt(0, dark);
+        g.setColorAt(1, light);
+        p.fillRect(rect, g);
+    }
+
+    // top/right corner
+    {
+        const QRect rect(margin + image.width() + 1, margin, shadow, shadow);
+        QRadialGradient g(rect.bottomLeft(), shadow);
+        g.setColorAt(0, dark);
+        g.setColorAt(1, light);
+        p.fillRect(rect, g);
+    }
+
+    // bottom/left corner
+    {
+        const QRect rect(margin, margin + image.height() + 1, shadow, shadow);
+        QRadialGradient g(rect.topRight(), shadow);
+        g.setColorAt(0, dark);
+        g.setColorAt(1, light);
+        p.fillRect(rect, g);
+    }
+
+    p.end();
+
+    return QPixmap::fromImage(dest);
+}
+
+void NewFormWidget::loadFrom(const QString &path, bool resourceFile, const QString &uiExtension,
+                       const QString &selectedItem, QTreeWidgetItem *&selectedItemFound)
+{
+    const QDir dir(path);
+
+    if (!dir.exists())
+        return;
+
+    // Iterate through the directory and add the templates
+    const QFileInfoList list = dir.entryInfoList(QStringList(QLatin1String("*.") + uiExtension),
+                                                 QDir::Files);
+
+    if (list.isEmpty())
+        return;
+
+    const QChar separator = resourceFile ? QChar(QLatin1Char('/'))
+                                         : QDir::separator();
+    QTreeWidgetItem *root = new QTreeWidgetItem(m_ui->treeWidget);
+    root->setFlags(root->flags() & ~Qt::ItemIsSelectable);
+    // Try to get something that is easy to read.
+    QString visiblePath = path;
+    int index = visiblePath.lastIndexOf(separator);
+    if (index != -1) {
+        // try to find a second slash, just to be a bit better.
+        const int index2 = visiblePath.lastIndexOf(separator, index - 1);
+        if (index2 != -1)
+            index = index2;
+        visiblePath = visiblePath.mid(index + 1);
+        visiblePath = QDir::toNativeSeparators(visiblePath);
+    }
+
+    const QChar underscore = QLatin1Char('_');
+    const QChar blank = QLatin1Char(' ');
+    root->setText(0, visiblePath.replace(underscore, blank));
+    root->setToolTip(0, path);
+
+    const QFileInfoList::const_iterator lcend = list.constEnd();
+    for (QFileInfoList::const_iterator it = list.constBegin(); it != lcend; ++it) {
+        if (!it->isFile())
+            continue;
+
+        QTreeWidgetItem *item = new QTreeWidgetItem(root);
+        const QString text = it->baseName().replace(underscore, blank);
+        if (selectedItemFound == 0 && text == selectedItem)
+            selectedItemFound = item;
+        item->setText(0, text);
+        item->setData(0, TemplateNameRole, it->absoluteFilePath());
+    }
+}
+
+void NewFormWidget::loadFrom(const QString &title, const QStringList &nameList,
+                       const QString &selectedItem, QTreeWidgetItem *&selectedItemFound)
+{
+    if (nameList.empty())
+        return;
+    QTreeWidgetItem *root = new QTreeWidgetItem(m_ui->treeWidget);
+    root->setFlags(root->flags() & ~Qt::ItemIsSelectable);
+    root->setText(0, title);
+    const QStringList::const_iterator cend = nameList.constEnd();
+    for (QStringList::const_iterator it = nameList.constBegin(); it != cend; ++it) {
+        const QString text = *it;
+        QTreeWidgetItem *item = new QTreeWidgetItem(root);
+        item->setText(0, text);
+        if (selectedItemFound == 0 && text == selectedItem)
+            selectedItemFound = item;
+        item->setData(0, ClassNameRole, *it);
+    }
+}
+
+void NewFormWidget::on_treeWidget_itemPressed(QTreeWidgetItem *item)
+{
+    if (item && !item->parent())
+        m_ui->treeWidget->setItemExpanded(item, !m_ui->treeWidget->isItemExpanded(item));
+}
+
+QSize NewFormWidget::templateSize() const
+{
+    return m_ui->sizeComboBox->itemData(m_ui->sizeComboBox->currentIndex()).toSize();
+}
+
+void NewFormWidget::setTemplateSize(const QSize &s)
+{
+    const int index = s.isNull() ? 0 : m_ui->sizeComboBox->findData(s);
+    if (index != -1)
+        m_ui->sizeComboBox->setCurrentIndex(index);
+}
+
+static QString readAll(const QString &fileName, QString *errorMessage)
+{
+    QFile file(fileName);
+    if (!file.open(QIODevice::ReadOnly|QIODevice::Text)) {
+        *errorMessage = NewFormWidget::tr("Unable to open the form template file '%1': %2").arg(fileName, file.errorString());
+        return QString();
+    }
+    return QString::fromUtf8(file.readAll());
+}
+
+QString NewFormWidget::itemToTemplate(const QTreeWidgetItem *item, QString *errorMessage) const
+{
+    const QSize size = templateSize();
+    // file name or string contents?
+    const QVariant templateFileName = item->data(0, TemplateNameRole);
+    if (templateFileName.type() == QVariant::String) {
+        const QString fileName = templateFileName.toString();
+        // No fixed size: just open.
+        if (size.isNull())
+            return readAll(fileName, errorMessage);
+        // try to find a file matching the size, like "../640x480/xx.ui"
+        const QFileInfo fiBase(fileName);
+        QString sizeFileName;
+        QTextStream(&sizeFileName) << fiBase.path() << QDir::separator()
+                                   << size.width() << QLatin1Char('x') << size.height() << QDir::separator()
+                                   << fiBase.fileName();
+        if (QFileInfo(sizeFileName).isFile())
+            return readAll(sizeFileName, errorMessage);
+        // Nothing found, scale via DOM/temporary file
+        QString contents = readAll(fileName, errorMessage);
+        if (!contents.isEmpty())
+            contents = qdesigner_internal::WidgetDataBase::scaleFormTemplate(contents, size, false);
+        return contents;
+    }
+    // Content.
+    const QString className = item->data(0, ClassNameRole).toString();
+    QString contents = qdesigner_internal::WidgetDataBase::formTemplate(m_core, className, formName(className));
+    if (!size.isNull())
+        contents = qdesigner_internal::WidgetDataBase::scaleFormTemplate(contents, size, false);
+    return contents;
+}
+
+void NewFormWidget::slotDeviceProfileIndexChanged(int idx)
+{
+    // Store index for form windows to take effect and refresh pixmap
+    QDesignerSharedSettings settings(m_core);
+    settings.setCurrentDeviceProfileIndex(idx - profileComboIndexOffset);
+    showCurrentItemPixmap();
+}
+
+int NewFormWidget::profileComboIndex() const
+{
+    return m_ui->profileComboBox->currentIndex();
+}
+
+qdesigner_internal::DeviceProfile NewFormWidget::currentDeviceProfile() const
+{
+    const int ci = profileComboIndex();
+    if (ci > 0)
+        return m_deviceProfiles.at(ci - profileComboIndexOffset);
+    return qdesigner_internal::DeviceProfile();
+}
+
+bool NewFormWidget::hasCurrentTemplate() const
+{
+    return m_currentItem != 0;
+}
+
+QString NewFormWidget::currentTemplateI(QString *ptrToErrorMessage)
+{
+    if (m_currentItem == 0) {
+        *ptrToErrorMessage = tr("Internal error: No template selected.");
+        return QString();
+    }
+    const QString contents = itemToTemplate(m_currentItem, ptrToErrorMessage);
+    if (contents.isEmpty())
+        return contents;
+
+    m_acceptedItem = m_currentItem;
+    return contents;
+}
+
+QString NewFormWidget::currentTemplate(QString *ptrToErrorMessage)
+{
+    if (ptrToErrorMessage)
+        return currentTemplateI(ptrToErrorMessage);
+    // Do not loose the error
+    QString errorMessage;
+    const QString contents = currentTemplateI(&errorMessage);
+    if (!errorMessage.isEmpty())
+        qWarning("%s", errorMessage.toUtf8().constData());
+    return contents;
+}
+
+}
+
+QT_END_NAMESPACE