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main.cpp Example File
demos/macmainwindow/main.cpp

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 #include <QtGui>

 #ifdef Q_WS_MAC

 #include <Carbon/Carbon.h>

 // The SearchWidget class wraps a native HISearchField.
 class SearchWidget : public QWidget
 {
     Q_OBJECT
 private:
     HIViewRef searchField;
     CFStringRef searchFieldText;

 public:
     SearchWidget(QWidget *parent = 0)
     :QWidget(parent)
     {
         // Create a native search field and pass its window id to QWidget::create.
         searchFieldText = CFStringCreateWithCString(0, "search", 0);
         HISearchFieldCreate(NULL/*bounds*/, kHISearchFieldAttributesSearchIcon | kHISearchFieldAttributesCancel,
                             NULL/*menu ref*/, searchFieldText, &searchField);
         create(reinterpret_cast<WId>(searchField));

         // Use a Qt menu for the search field menu.
         QMenu *searchMenu = new QMenu(this);

         QAction * indexAction = searchMenu->addAction("Index Search");
         indexAction->setCheckable(true);
         indexAction->setChecked(true);

         QAction * fulltextAction = searchMenu->addAction("Full Text Search");
         fulltextAction->setCheckable(true);

         QActionGroup *searchActionGroup = new QActionGroup(this);
         searchActionGroup->addAction(indexAction);
         searchActionGroup->addAction(fulltextAction);
         searchActionGroup->setExclusive(true);

         MenuRef macSearchMenu = searchMenu->macMenu(0);
         HISearchFieldSetSearchMenu(searchField, macSearchMenu);
         setSizePolicy(QSizePolicy(QSizePolicy::Fixed, QSizePolicy::Fixed));

     }

     ~SearchWidget()
     {
         CFRelease(searchField);
         CFRelease(searchFieldText);
     }

     // Get the size hint from the search field.
     QSize sizeHint() const
     {
         EventRef event;
         HIRect optimalBounds;
         CreateEvent(0, kEventClassControl,
             kEventControlGetOptimalBounds,
             GetCurrentEventTime(),
             kEventAttributeUserEvent, &event);

         SendEventToEventTargetWithOptions(event,
             HIObjectGetEventTarget(HIObjectRef(winId())),
             kEventTargetDontPropagate);

         GetEventParameter(event,
             kEventParamControlOptimalBounds, typeHIRect,
             0, sizeof(HIRect), 0, &optimalBounds);

         ReleaseEvent(event);
         return QSize(optimalBounds.size.width + 100, // make it a bit wider.
                      optimalBounds.size.height);
     }
 };

 class SearchWrapper : public QWidget
 {
 Q_OBJECT
 public:
     SearchWrapper(QWidget *parent = 0)
     :QWidget(parent)
     {
         s = new SearchWidget(this);
         s->move(2,2);
         setSizePolicy(QSizePolicy(QSizePolicy::Fixed, QSizePolicy::Fixed));
     }

     QSize sizeHint() const
     {
         return s->sizeHint() + QSize(6, 4);
     }

     SearchWidget *s;
 };

 class Spacer : public QWidget
 {
 Q_OBJECT
 public:
     Spacer(QWidget *parent = 0)
     :QWidget(parent)
     {
         QSizePolicy sizePolicy(QSizePolicy::Expanding, QSizePolicy::Fixed);
         setSizePolicy(sizePolicy);
     }

     QSize sizeHint() const
     {
         return QSize(1, 1);
     }
 };

 class MacSplitterHandle : public QSplitterHandle
 {
 Q_OBJECT
 public:
     MacSplitterHandle(Qt::Orientation orientation, QSplitter *parent)
     : QSplitterHandle(orientation, parent) {   }

     // Paint the horizontal handle as a gradient, paint
     // the vertical handle as a line.
     void paintEvent(QPaintEvent *)
     {
         QPainter painter(this);

         QColor topColor(145, 145, 145);
         QColor bottomColor(142, 142, 142);
         QColor gradientStart(252, 252, 252);
         QColor gradientStop(223, 223, 223);

         if (orientation() == Qt::Vertical) {
             painter.setPen(topColor);
             painter.drawLine(0, 0, width(), 0);
             painter.setPen(bottomColor);
             painter.drawLine(0, height() - 1, width(), height() - 1);

             QLinearGradient linearGrad(QPointF(0, 0), QPointF(0, height() -3));
             linearGrad.setColorAt(0, gradientStart);
             linearGrad.setColorAt(1, gradientStop);
             painter.fillRect(QRect(QPoint(0,1), size() - QSize(0, 2)), QBrush(linearGrad));
         } else {
             painter.setPen(topColor);
             painter.drawLine(0, 0, 0, height());
         }
     }

     QSize sizeHint() const
     {
         QSize parent = QSplitterHandle::sizeHint();
         if (orientation() == Qt::Vertical) {
             return parent + QSize(0, 3);
         } else {
             return QSize(1, parent.height());
         }
     }
 };

 class MacSplitter : public QSplitter
 {
 public:
     QSplitterHandle *createHandle()
     {
         return new MacSplitterHandle(orientation(), this);
     }
 };

 class MacMainWindow : public QMainWindow
 {
 Q_OBJECT
 public:
     MacMainWindow()
     {
         QSettings settings;
         restoreGeometry(settings.value("Geometry").toByteArray());

         setWindowTitle("Mac Main Window");

         splitter = new MacSplitter();

         // Set up the left-hand side blue side bar.
         sidebar = new QTreeView();
         sidebar->setFrameStyle(QFrame::NoFrame);
         sidebar->setAttribute(Qt::WA_MacShowFocusRect, false);
         sidebar->setAutoFillBackground(true);

         // Set the palette.
         QPalette palette = sidebar->palette();
         QColor macSidebarColor(231, 237, 246);
         QColor macSidebarHighlightColor(168, 183, 205);
         palette.setColor(QPalette::Base, macSidebarColor);
         palette.setColor(QPalette::Highlight, macSidebarHighlightColor);
         sidebar->setPalette(palette);

         sidebar->setModel(createItemModel());
         sidebar->header()->hide();
         sidebar->setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
         sidebar->setTextElideMode(Qt::ElideMiddle);

         splitter->addWidget(sidebar);

         horizontalSplitter = new MacSplitter();
         horizontalSplitter->setOrientation(Qt::Vertical);
         splitter->addWidget(horizontalSplitter);

         splitter->setStretchFactor(0, 0);
         splitter->setStretchFactor(1, 1);

         // Set up the top document list view.
         documents = new QListView();
         documents->setFrameStyle(QFrame::NoFrame);
         documents->setAttribute(Qt::WA_MacShowFocusRect, false);
         documents->setModel(createDocumentModel());
         documents->setAlternatingRowColors(true);
         documents->setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOn);
         horizontalSplitter->addWidget(documents);
         horizontalSplitter->setStretchFactor(0, 0);

         // Set up the text view.
         textedit = new QTextEdit();
         textedit->setFrameStyle(QFrame::NoFrame);
         textedit->setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOn);
         textedit->setText("<br><br><br><br><br><br><center><b>This demo shows how to create a \
                            Qt main window application that has the same appearance as other \
                            Mac OS X applications such as Mail or iTunes. This includes \
                            customizing the item views and QSplitter and wrapping native widgets \
                            such as the search field.</b></center>");

         horizontalSplitter->addWidget(textedit);
         horizontalSplitter->setStretchFactor(1, 1);

         setCentralWidget(splitter);

         toolBar = addToolBar(tr("Search"));
         toolBar->addWidget(new Spacer());
         toolBar->addWidget(new SearchWrapper());

         setUnifiedTitleAndToolBarOnMac(true);
     }

     ~MacMainWindow()
     {
         QSettings settings;
         settings.setValue("Geometry", saveGeometry());
     }

     QAbstractItemModel *createItemModel()
     {
         QStandardItemModel *model = new QStandardItemModel();
         QStandardItem *parentItem = model->invisibleRootItem();

         QStandardItem *documentationItem = new QStandardItem("Documentation");
         parentItem->appendRow(documentationItem);

         QStandardItem *assistantItem = new QStandardItem("Qt MainWindow Manual");
         documentationItem->appendRow(assistantItem);

         QStandardItem *designerItem = new QStandardItem("Qt Designer Manual");
         documentationItem->appendRow(designerItem);

         QStandardItem *qtItem = new QStandardItem("Qt Reference Documentation");
         qtItem->appendRow(new QStandardItem("Classes"));
         qtItem->appendRow(new QStandardItem("Overviews"));
         qtItem->appendRow(new QStandardItem("Tutorial & Examples"));
         documentationItem->appendRow(qtItem);

         QStandardItem *bookmarksItem = new QStandardItem("Bookmarks");
         parentItem->appendRow(bookmarksItem);
         bookmarksItem->appendRow(new QStandardItem("QWidget"));
         bookmarksItem->appendRow(new QStandardItem("QObject"));
         bookmarksItem->appendRow(new QStandardItem("QWizard"));

         return model;
     }

     void resizeEvent(QResizeEvent *e)
     {
         toolBar->updateGeometry();
     }

     QAbstractItemModel *createDocumentModel()
     {
         QStandardItemModel *model = new QStandardItemModel();
         QStandardItem *parentItem = model->invisibleRootItem();
         parentItem->appendRow(new QStandardItem("QWidget Class Reference"));
         parentItem->appendRow(new QStandardItem("QObject Class Reference"));
         parentItem->appendRow(new QStandardItem("QListView Class Reference"));

         return model;
     }

 public:
     QSplitter *splitter;
     QSplitter *horizontalSplitter;
     QTreeView *sidebar;
     QListView *documents;
     QTextEdit *textedit;
     QVBoxLayout *layout;
     SearchWidget *searchWidget;
     QToolBar * toolBar;
 };

 int main(int argc, char **argv)
 {
     QApplication app(argc, argv);
     MacMainWindow mainWindow;
     mainWindow.show();
     return app.exec();
 }

 #include "main.moc"

 #else
 int main(int argc, char **argv)
 {
     QApplication app(argc, argv);
     qDebug() << "This is a Mac-only demo";
 }

 #endif