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displaywidget.h Example File
^{tools/qtdemo/displaywidget.h}

 /****************************************************************************
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 ** Copyright (C) 2005-2007 Trolltech ASA. All rights reserved.
 **
 ** This file is part of the example classes of the Qt Toolkit.
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 ** License version 2.0 as published by the Free Software Foundation
 ** and appearing in the file LICENSE.GPL included in the packaging of
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 ** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
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 #ifndef DISPLAYWIDGET_H
 #define DISPLAYWIDGET_H

 #include <QBasicTimer>
 #include <QWidget>

 class DisplayShape;

 class DisplayWidget : public QWidget
 {
     Q_OBJECT

 public:
     DisplayWidget(QWidget *parent = 0);
     QSize minimumSizeHint() const;
     DisplayShape *shape(int index) const;
     int shapesCount() const;
     void appendShape(DisplayShape *shape);
     void enableUpdates();
     void insertShape(int position, DisplayShape *shape);
     void reset();

 protected:
     void mouseMoveEvent(QMouseEvent *event);
     void mousePressEvent(QMouseEvent *event);
     void paintEvent(QPaintEvent *event);
     void timerEvent(QTimerEvent *event);

 signals:
     void actionRequested(const QString &name);
     void displayEmpty();
     void categoryRequested(const QString &name);
     void documentationRequested(const QString &name);
     void exampleRequested(const QString &name);
     void launchRequested(const QString &name);

 private:
     bool empty;
     bool emptying;
     bool updatesEnabled;
     QList<DisplayShape*> shapes;
     QBasicTimer timer;

 #if defined(Q_WS_X11)
 private slots:
     void toggleXRender();

 private:
     int numFrames;
     int frameTime;
     int avgRate;
     bool testDrawSpeed;
 #endif
 };

 #endif