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# displaywidget.h Example File
tools/qtdemo/displaywidget.h

    /****************************************************************************
    **
    ** Copyright (C) 2005-2006 Trolltech ASA. All rights reserved.
    **
    ** This file is part of the example classes of the Qt Toolkit.
    **
    ** Licensees holding valid Qt Preview licenses may use this file in
    ** accordance with the Qt Preview License Agreement provided with the
    ** Software.
    **
    ** See http://www.trolltech.com/pricing.html or email sales@trolltech.com for
    ** information about Qt Commercial License Agreements.
    **
    ** Contact info@trolltech.com if any conditions of this licensing are
    ** not clear to you.
    **
    ** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
    ** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
    **
    ****************************************************************************/

    #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