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controllerwindow.cpp Example File
widgets/windowflags/controllerwindow.cpp

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 #include <QtGui>

 #include "controllerwindow.h"

 ControllerWindow::ControllerWindow()
 {
     previewWindow = new PreviewWindow(this);

     createTypeGroupBox();
     createHintsGroupBox();

     quitButton = new QPushButton(tr("&Quit"));
     connect(quitButton, SIGNAL(clicked()), qApp, SLOT(quit()));

     QHBoxLayout *bottomLayout = new QHBoxLayout;
     bottomLayout->addStretch();
     bottomLayout->addWidget(quitButton);

     QVBoxLayout *mainLayout = new QVBoxLayout;
     mainLayout->addWidget(typeGroupBox);
     mainLayout->addWidget(hintsGroupBox);
     mainLayout->addLayout(bottomLayout);
     setLayout(mainLayout);

     setWindowTitle(tr("Window Flags"));
     updatePreview();
 }

 void ControllerWindow::updatePreview()
 {
     Qt::WindowFlags flags = 0;

     if (windowRadioButton->isChecked()) {
         flags = Qt::Window;
     } else if (dialogRadioButton->isChecked()) {
         flags = Qt::Dialog;
     } else if (sheetRadioButton->isChecked()) {
         flags = Qt::Sheet;
     } else if (drawerRadioButton->isChecked()) {
         flags = Qt::Drawer;
     } else if (popupRadioButton->isChecked()) {
         flags = Qt::Popup;
     } else if (toolRadioButton->isChecked()) {
         flags = Qt::Tool;
     } else if (toolTipRadioButton->isChecked()) {
         flags = Qt::ToolTip;
     } else if (splashScreenRadioButton->isChecked()) {
         flags = Qt::SplashScreen;
     }

     if (msWindowsFixedSizeDialogCheckBox->isChecked())
         flags |= Qt::MSWindowsFixedSizeDialogHint;
     if (x11BypassWindowManagerCheckBox->isChecked())
         flags |= Qt::X11BypassWindowManagerHint;
     if (framelessWindowCheckBox->isChecked())
         flags |= Qt::FramelessWindowHint;
     if (windowTitleCheckBox->isChecked())
         flags |= Qt::WindowTitleHint;
     if (windowSystemMenuCheckBox->isChecked())
         flags |= Qt::WindowSystemMenuHint;
     if (windowMinimizeButtonCheckBox->isChecked())
         flags |= Qt::WindowMinimizeButtonHint;
     if (windowMaximizeButtonCheckBox->isChecked())
         flags |= Qt::WindowMaximizeButtonHint;
     if (windowContextHelpButtonCheckBox->isChecked())
         flags |= Qt::WindowContextHelpButtonHint;
     if (windowShadeButtonCheckBox->isChecked())
         flags |= Qt::WindowShadeButtonHint;
     if (windowStaysOnTopCheckBox->isChecked())
         flags |= Qt::WindowStaysOnTopHint;
     if (customizeWindowHintCheckBox->isChecked())
         flags |= Qt::CustomizeWindowHint;

     previewWindow->setWindowFlags(flags);

     QPoint pos = previewWindow->pos();
     if (pos.x() < 0)
         pos.setX(0);
     if (pos.y() < 0)
         pos.setY(0);
     previewWindow->move(pos);
     previewWindow->show();
 }

 void ControllerWindow::createTypeGroupBox()
 {
     typeGroupBox = new QGroupBox(tr("Type"));

     windowRadioButton = createRadioButton(tr("Window"));
     dialogRadioButton = createRadioButton(tr("Dialog"));
     sheetRadioButton = createRadioButton(tr("Sheet"));
     drawerRadioButton = createRadioButton(tr("Drawer"));
     popupRadioButton = createRadioButton(tr("Popup"));
     toolRadioButton = createRadioButton(tr("Tool"));
     toolTipRadioButton = createRadioButton(tr("Tooltip"));
     splashScreenRadioButton = createRadioButton(tr("Splash screen"));
     windowRadioButton->setChecked(true);

     QGridLayout *layout = new QGridLayout;
     layout->addWidget(windowRadioButton, 0, 0);
     layout->addWidget(dialogRadioButton, 1, 0);
     layout->addWidget(sheetRadioButton, 2, 0);
     layout->addWidget(drawerRadioButton, 3, 0);
     layout->addWidget(popupRadioButton, 0, 1);
     layout->addWidget(toolRadioButton, 1, 1);
     layout->addWidget(toolTipRadioButton, 2, 1);
     layout->addWidget(splashScreenRadioButton, 3, 1);
     typeGroupBox->setLayout(layout);
 }

 void ControllerWindow::createHintsGroupBox()
 {
     hintsGroupBox = new QGroupBox(tr("Hints"));

     msWindowsFixedSizeDialogCheckBox =
             createCheckBox(tr("MS Windows fixed size dialog"));
     x11BypassWindowManagerCheckBox =
             createCheckBox(tr("X11 bypass window manager"));
     framelessWindowCheckBox = createCheckBox(tr("Frameless window"));
     windowTitleCheckBox = createCheckBox(tr("Window title"));
     windowSystemMenuCheckBox = createCheckBox(tr("Window system menu"));
     windowMinimizeButtonCheckBox = createCheckBox(tr("Window minimize button"));
     windowMaximizeButtonCheckBox = createCheckBox(tr("Window maximize button"));
     windowContextHelpButtonCheckBox =
             createCheckBox(tr("Window context help button"));
     windowShadeButtonCheckBox = createCheckBox(tr("Window shade button"));
     windowStaysOnTopCheckBox = createCheckBox(tr("Window stays on top"));
     customizeWindowHintCheckBox= createCheckBox(tr("Customize window"));

     QGridLayout *layout = new QGridLayout;
     layout->addWidget(msWindowsFixedSizeDialogCheckBox, 0, 0);
     layout->addWidget(x11BypassWindowManagerCheckBox, 1, 0);
     layout->addWidget(framelessWindowCheckBox, 2, 0);
     layout->addWidget(windowTitleCheckBox, 3, 0);
     layout->addWidget(windowSystemMenuCheckBox, 4, 0);
     layout->addWidget(windowMinimizeButtonCheckBox, 0, 1);
     layout->addWidget(windowMaximizeButtonCheckBox, 1, 1);
     layout->addWidget(windowContextHelpButtonCheckBox, 2, 1);
     layout->addWidget(windowShadeButtonCheckBox, 3, 1);
     layout->addWidget(windowStaysOnTopCheckBox, 4, 1);
     layout->addWidget(customizeWindowHintCheckBox, 5, 0);
     hintsGroupBox->setLayout(layout);
 }

 QCheckBox *ControllerWindow::createCheckBox(const QString &text)
 {
     QCheckBox *checkBox = new QCheckBox(text);
     connect(checkBox, SIGNAL(clicked()), this, SLOT(updatePreview()));
     return checkBox;
 }

 QRadioButton *ControllerWindow::createRadioButton(const QString &text)
 {
     QRadioButton *button = new QRadioButton(text);
     connect(button, SIGNAL(clicked()), this, SLOT(updatePreview()));
     return button;
 }