macmainwindow.h Example File
demos/macmainwindow/macmainwindow.h

 /****************************************************************************
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 #ifndef MACMAINWINDOW_H
 #define MACMAINWINDOW_H

 #include <QtGui>

 #ifdef Q_WS_MAC

 #import <qmaccocoaviewcontainer_mac.h>

 #ifdef QT_MAC_USE_COCOA
 class SearchWidget : public QMacCocoaViewContainer
 {
     Q_OBJECT
 public:
     SearchWidget(QWidget *parent = 0);
     ~SearchWidget();

     QSize sizeHint() const;
 private:
 };

 #else
 #include <Carbon/Carbon.h>

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

 public:
     QSize sizeHint() const;
     SearchWidget(QWidget *parent = 0);
     ~SearchWidget();
 };

 #endif

 QMenu *createMenu(QWidget *parent);

 class SearchWrapper : public QWidget
 {
 Q_OBJECT
 public:
     SearchWrapper(QWidget *parent = 0);
     QSize sizeHint() const;
     QWidget *s;
 };

 class Spacer : public QWidget
 {
 Q_OBJECT
 public:
     Spacer(QWidget *parent = 0);
     QSize sizeHint() const;
 };

 class MacSplitterHandle : public QSplitterHandle
 {
 Q_OBJECT
 public:
     MacSplitterHandle(Qt::Orientation orientation, QSplitter *parent);
     void paintEvent(QPaintEvent *);
     QSize sizeHint() const;
 };

 class MacSplitter : public QSplitter
 {
 public:
     QSplitterHandle *createHandle();
 };

 class MacMainWindow : public QMainWindow
 {
 Q_OBJECT
 public:
     MacMainWindow();
     ~MacMainWindow();
     QAbstractItemModel *createItemModel();
     void resizeEvent(QResizeEvent *e);
     QAbstractItemModel *createDocumentModel();
 public:
     QSplitter *splitter;
     QSplitter *horizontalSplitter;
     QTreeView *sidebar;
     QListView *documents;
     QTextEdit *textedit;
     QVBoxLayout *layout;
     SearchWidget *searchWidget;
     QToolBar * toolBar;
 };

 #endif // Q_WS_MAC

 #endif //MACMAINWINDOW_H