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mydecoration.h Example File
qws/simpledecoration/mydecoration.h

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 #ifndef MYDECORATION_H
 #define MYDECORATION_H

 #include <QDecorationDefault>
 #include <QHash>
 #include <QPixmap>
 #include <QRegion>
 #include <Qt>

 class MyDecoration : public QDecorationDefault
 {
 public:
     MyDecoration();
     QRegion region(const QWidget *widget, const QRect &insideRect, int decorationRegion);
     bool paint(QPainter *painter, const QWidget *widget, int decorationRegion, DecorationState state);

 private:
     int border;
     int buttonHeight;
     int buttonMargin;
     int buttonWidth;
     int titleHeight;
     QHash<Qt::WindowType, DecorationRegion> buttonHintMap;
     QHash<DecorationRegion, QPixmap> normalButtonPixmaps;
     QHash<DecorationRegion, QPixmap> maximizedButtonPixmaps;
     QVector<Qt::WindowType> buttonHints;
     QVector<DecorationRegion> stateRegions;
 };

 #endif