Long live Qt!

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diff --git a/examples/widgets/icons/mainwindow.cpp b/examples/widgets/icons/mainwindow.cpp
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+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: Qt Software Information (qt-info@nokia.com)
+**
+** This file is part of the examples of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the either Technology Preview License Agreement or the
+** Beta Release License Agreement.
+**
+** 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 1.0, 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 are unsure which license is appropriate for your use, please
+** contact the sales department at qt-sales@nokia.com.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include <QtGui>
+
+#include "iconpreviewarea.h"
+#include "iconsizespinbox.h"
+#include "imagedelegate.h"
+#include "mainwindow.h"
+
+//! [0]
+MainWindow::MainWindow()
+{
+    centralWidget = new QWidget;
+    setCentralWidget(centralWidget);
+
+    createPreviewGroupBox();
+    createImagesGroupBox();
+    createIconSizeGroupBox();
+
+    createActions();
+    createMenus();
+    createContextMenu();
+
+    QGridLayout *mainLayout = new QGridLayout;
+    mainLayout->addWidget(previewGroupBox, 0, 0, 1, 2);
+    mainLayout->addWidget(imagesGroupBox, 1, 0);
+    mainLayout->addWidget(iconSizeGroupBox, 1, 1);
+    centralWidget->setLayout(mainLayout);
+
+    setWindowTitle(tr("Icons"));
+    checkCurrentStyle();
+    otherRadioButton->click();
+
+    resize(minimumSizeHint());
+}
+//! [0]
+
+//! [1]
+void MainWindow::about()
+{
+    QMessageBox::about(this, tr("About Icons"),
+            tr("The <b>Icons</b> example illustrates how Qt renders an icon in "
+               "different modes (active, normal, disabled, and selected) and "
+               "states (on and off) based on a set of images."));
+}
+//! [1]
+
+//! [2]
+void MainWindow::changeStyle(bool checked)
+{
+    if (!checked)
+        return;
+
+    QAction *action = qobject_cast<QAction *>(sender());
+//! [2] //! [3]
+    QStyle *style = QStyleFactory::create(action->data().toString());
+//! [3] //! [4]
+    Q_ASSERT(style);
+    QApplication::setStyle(style);
+
+    smallRadioButton->setText(tr("Small (%1 x %1)")
+            .arg(style->pixelMetric(QStyle::PM_SmallIconSize)));
+    largeRadioButton->setText(tr("Large (%1 x %1)")
+            .arg(style->pixelMetric(QStyle::PM_LargeIconSize)));
+    toolBarRadioButton->setText(tr("Toolbars (%1 x %1)")
+            .arg(style->pixelMetric(QStyle::PM_ToolBarIconSize)));
+    listViewRadioButton->setText(tr("List views (%1 x %1)")
+            .arg(style->pixelMetric(QStyle::PM_ListViewIconSize)));
+    iconViewRadioButton->setText(tr("Icon views (%1 x %1)")
+            .arg(style->pixelMetric(QStyle::PM_IconViewIconSize)));
+    tabBarRadioButton->setText(tr("Tab bars (%1 x %1)")
+            .arg(style->pixelMetric(QStyle::PM_TabBarIconSize)));
+
+    changeSize();
+}
+//! [4]
+
+//! [5]
+void MainWindow::changeSize(bool checked)
+{
+    if (!checked)
+        return;
+
+    int extent;
+
+    if (otherRadioButton->isChecked()) {
+        extent = otherSpinBox->value();
+    } else {
+        QStyle::PixelMetric metric;
+
+        if (smallRadioButton->isChecked()) {
+            metric = QStyle::PM_SmallIconSize;
+        } else if (largeRadioButton->isChecked()) {
+            metric = QStyle::PM_LargeIconSize;
+        } else if (toolBarRadioButton->isChecked()) {
+            metric = QStyle::PM_ToolBarIconSize;
+        } else if (listViewRadioButton->isChecked()) {
+            metric = QStyle::PM_ListViewIconSize;
+        } else if (iconViewRadioButton->isChecked()) {
+            metric = QStyle::PM_IconViewIconSize;
+        } else {
+            metric = QStyle::PM_TabBarIconSize;
+        }
+        extent = QApplication::style()->pixelMetric(metric);
+    }
+    previewArea->setSize(QSize(extent, extent));
+    otherSpinBox->setEnabled(otherRadioButton->isChecked());
+}
+//! [5]
+
+//! [6]
+void MainWindow::changeIcon()
+{
+    QIcon icon;
+
+    for (int row = 0; row < imagesTable->rowCount(); ++row) {
+        QTableWidgetItem *item0 = imagesTable->item(row, 0);
+        QTableWidgetItem *item1 = imagesTable->item(row, 1);
+        QTableWidgetItem *item2 = imagesTable->item(row, 2);
+
+        if (item0->checkState() == Qt::Checked) {
+            QIcon::Mode mode;
+            if (item1->text() == tr("Normal")) {
+                mode = QIcon::Normal;
+            } else if (item1->text() == tr("Active")) {
+                mode = QIcon::Active;
+            } else if (item1->text() == tr("Disabled")) {
+                mode = QIcon::Disabled;
+            } else {
+                mode = QIcon::Selected;
+            }
+
+            QIcon::State state;
+            if (item2->text() == tr("On")) {
+                state = QIcon::On;
+            } else {
+                state = QIcon::Off;
+//! [6] //! [7]
+            }
+//! [7]
+
+//! [8]
+            QString fileName = item0->data(Qt::UserRole).toString();
+            QImage image(fileName);
+            if (!image.isNull())
+                icon.addPixmap(QPixmap::fromImage(image), mode, state);
+//! [8] //! [9]
+        }
+//! [9] //! [10]
+    }
+//! [10]
+
+//! [11]
+    previewArea->setIcon(icon);
+}
+//! [11]
+
+//! [12]
+void MainWindow::addImages()
+{
+    QStringList fileNames = QFileDialog::getOpenFileNames(this,
+                                    tr("Open Images"), "",
+                                    tr("Images (*.png *.xpm *.jpg);;"
+                                       "All Files (*)"));
+    if (!fileNames.isEmpty()) {
+        foreach (QString fileName, fileNames) {
+            int row = imagesTable->rowCount();
+            imagesTable->setRowCount(row + 1);
+//! [12]
+
+//! [13]
+            QString imageName = QFileInfo(fileName).baseName();
+//! [13] //! [14]
+            QTableWidgetItem *item0 = new QTableWidgetItem(imageName);
+            item0->setData(Qt::UserRole, fileName);
+            item0->setFlags(item0->flags() & ~Qt::ItemIsEditable);
+//! [14]
+
+//! [15]
+            QTableWidgetItem *item1 = new QTableWidgetItem(tr("Normal"));
+//! [15] //! [16]
+            QTableWidgetItem *item2 = new QTableWidgetItem(tr("Off"));
+
+            if (guessModeStateAct->isChecked()) {
+                if (fileName.contains("_act")) {
+                    item1->setText(tr("Active"));
+                } else if (fileName.contains("_dis")) {
+                    item1->setText(tr("Disabled"));
+                } else if (fileName.contains("_sel")) {
+                    item1->setText(tr("Selected"));
+                }
+
+                if (fileName.contains("_on"))
+                    item2->setText(tr("On"));
+//! [16] //! [17]
+            }
+//! [17]
+
+//! [18]
+            imagesTable->setItem(row, 0, item0);
+//! [18] //! [19]
+            imagesTable->setItem(row, 1, item1);
+            imagesTable->setItem(row, 2, item2);
+            imagesTable->openPersistentEditor(item1);
+            imagesTable->openPersistentEditor(item2);
+
+            item0->setCheckState(Qt::Checked);
+        }
+    }
+}
+//! [19]
+
+//! [20]
+void MainWindow::removeAllImages()
+{
+    imagesTable->setRowCount(0);
+    changeIcon();
+}
+//! [20]
+
+void MainWindow::createPreviewGroupBox()
+{
+    previewGroupBox = new QGroupBox(tr("Preview"));
+
+    previewArea = new IconPreviewArea;
+
+    QVBoxLayout *layout = new QVBoxLayout;
+    layout->addWidget(previewArea);
+    previewGroupBox->setLayout(layout);
+}
+
+//! [21]
+void MainWindow::createImagesGroupBox()
+{
+    imagesGroupBox = new QGroupBox(tr("Images"));
+
+    imagesTable = new QTableWidget;
+    imagesTable->setSelectionMode(QAbstractItemView::NoSelection);
+    imagesTable->setItemDelegate(new ImageDelegate(this));
+//! [21]
+
+//! [22]
+    QStringList labels;
+//! [22] //! [23]
+    labels << tr("Image") << tr("Mode") << tr("State");
+
+    imagesTable->horizontalHeader()->setDefaultSectionSize(90);
+    imagesTable->setColumnCount(3);
+    imagesTable->setHorizontalHeaderLabels(labels);
+    imagesTable->horizontalHeader()->setResizeMode(0, QHeaderView::Stretch);
+    imagesTable->horizontalHeader()->setResizeMode(1, QHeaderView::Fixed);
+    imagesTable->horizontalHeader()->setResizeMode(2, QHeaderView::Fixed);
+    imagesTable->verticalHeader()->hide();
+//! [23]
+
+//! [24]
+    connect(imagesTable, SIGNAL(itemChanged(QTableWidgetItem *)),
+//! [24] //! [25]
+            this, SLOT(changeIcon()));
+
+    QVBoxLayout *layout = new QVBoxLayout;
+    layout->addWidget(imagesTable);
+    imagesGroupBox->setLayout(layout);
+}
+//! [25]
+
+//! [26]
+void MainWindow::createIconSizeGroupBox()
+{
+    iconSizeGroupBox = new QGroupBox(tr("Icon Size"));
+
+    smallRadioButton = new QRadioButton;
+    largeRadioButton = new QRadioButton;
+    toolBarRadioButton = new QRadioButton;
+    listViewRadioButton = new QRadioButton;
+    iconViewRadioButton = new QRadioButton;
+    tabBarRadioButton = new QRadioButton;
+    otherRadioButton = new QRadioButton(tr("Other:"));
+
+    otherSpinBox = new IconSizeSpinBox;
+    otherSpinBox->setRange(8, 128);
+    otherSpinBox->setValue(64);
+//! [26]
+
+//! [27]
+    connect(smallRadioButton, SIGNAL(toggled(bool)),
+            this, SLOT(changeSize(bool)));
+    connect(largeRadioButton, SIGNAL(toggled(bool)),
+            this, SLOT(changeSize(bool)));
+    connect(toolBarRadioButton, SIGNAL(toggled(bool)),
+            this, SLOT(changeSize(bool)));
+    connect(listViewRadioButton, SIGNAL(toggled(bool)),
+            this, SLOT(changeSize(bool)));
+    connect(iconViewRadioButton, SIGNAL(toggled(bool)),
+            this, SLOT(changeSize(bool)));
+    connect(tabBarRadioButton, SIGNAL(toggled(bool)),
+            this, SLOT(changeSize(bool)));
+    connect(otherRadioButton, SIGNAL(toggled(bool)),
+            this, SLOT(changeSize(bool)));
+    connect(otherSpinBox, SIGNAL(valueChanged(int)), this, SLOT(changeSize()));
+
+    QHBoxLayout *otherSizeLayout = new QHBoxLayout;
+    otherSizeLayout->addWidget(otherRadioButton);
+    otherSizeLayout->addWidget(otherSpinBox);
+    otherSizeLayout->addStretch();
+
+    QGridLayout *layout = new QGridLayout;
+    layout->addWidget(smallRadioButton, 0, 0);
+    layout->addWidget(largeRadioButton, 1, 0);
+    layout->addWidget(toolBarRadioButton, 2, 0);
+    layout->addWidget(listViewRadioButton, 0, 1);
+    layout->addWidget(iconViewRadioButton, 1, 1);
+    layout->addWidget(tabBarRadioButton, 2, 1);
+    layout->addLayout(otherSizeLayout, 3, 0, 1, 2);
+    layout->setRowStretch(4, 1);
+    iconSizeGroupBox->setLayout(layout);
+}
+//! [27]
+
+//! [28]
+void MainWindow::createActions()
+{
+    addImagesAct = new QAction(tr("&Add Images..."), this);
+    addImagesAct->setShortcut(tr("Ctrl+A"));
+    connect(addImagesAct, SIGNAL(triggered()), this, SLOT(addImages()));
+
+    removeAllImagesAct = new QAction(tr("&Remove All Images"), this);
+    removeAllImagesAct->setShortcut(tr("Ctrl+R"));
+    connect(removeAllImagesAct, SIGNAL(triggered()),
+            this, SLOT(removeAllImages()));
+
+    exitAct = new QAction(tr("&Quit"), this);
+    exitAct->setShortcut(tr("Ctrl+Q"));
+    connect(exitAct, SIGNAL(triggered()), this, SLOT(close()));
+
+    styleActionGroup = new QActionGroup(this);
+    foreach (QString styleName, QStyleFactory::keys()) {
+        QAction *action = new QAction(styleActionGroup);
+        action->setText(tr("%1 Style").arg(styleName));
+        action->setData(styleName);
+        action->setCheckable(true);
+        connect(action, SIGNAL(triggered(bool)), this, SLOT(changeStyle(bool)));
+    }
+
+    guessModeStateAct = new QAction(tr("&Guess Image Mode/State"), this);
+    guessModeStateAct->setCheckable(true);
+    guessModeStateAct->setChecked(true);
+
+    aboutAct = new QAction(tr("&About"), this);
+    connect(aboutAct, SIGNAL(triggered()), this, SLOT(about()));
+
+    aboutQtAct = new QAction(tr("About &Qt"), this);
+    connect(aboutQtAct, SIGNAL(triggered()), qApp, SLOT(aboutQt()));
+}
+//! [28]
+
+//! [29]
+void MainWindow::createMenus()
+{
+    fileMenu = menuBar()->addMenu(tr("&File"));
+    fileMenu->addAction(addImagesAct);
+    fileMenu->addAction(removeAllImagesAct);
+    fileMenu->addSeparator();
+    fileMenu->addAction(exitAct);
+
+    viewMenu = menuBar()->addMenu(tr("&View"));
+    foreach (QAction *action, styleActionGroup->actions())
+        viewMenu->addAction(action);
+    viewMenu->addSeparator();
+    viewMenu->addAction(guessModeStateAct);
+
+    menuBar()->addSeparator();
+
+    helpMenu = menuBar()->addMenu(tr("&Help"));
+    helpMenu->addAction(aboutAct);
+    helpMenu->addAction(aboutQtAct);
+}
+//! [29]
+
+//! [30]
+void MainWindow::createContextMenu()
+{
+    imagesTable->setContextMenuPolicy(Qt::ActionsContextMenu);
+    imagesTable->addAction(addImagesAct);
+    imagesTable->addAction(removeAllImagesAct);
+}
+//! [30]
+
+//! [31]
+void MainWindow::checkCurrentStyle()
+{
+    foreach (QAction *action, styleActionGroup->actions()) {
+        QString styleName = action->data().toString();
+        QStyle *candidate = QStyleFactory::create(styleName);
+        Q_ASSERT(candidate);
+        if (candidate->metaObject()->className()
+                == QApplication::style()->metaObject()->className()) {
+            action->trigger();
+            return;
+        }
+        delete candidate;
+    }
+}
+//! [31]