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

    /****************************************************************************
    **
    ** Copyright (C) 2005-2006 Trolltech ASA. All rights reserved.
    **
    ** This file is part of the documentation 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
    ** this file.  Please review the following information to ensure GNU
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    ** http://www.trolltech.com/products/qt/opensource.html
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    ** review the following information:
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    ** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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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)
        int numFrames;
        int frameTime;
        int avgRate;
        bool testDrawSpeed;
    #endif
    };

    #endif