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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 documentation of the Qt Toolkit.
        **
        ** This file may be used under the terms of the GNU General Public
        ** 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
        ** General Public Licensing requirements will be met:
        ** http://www.trolltech.com/products/qt/opensource.html
        **
        ** If you are unsure which license is appropriate for your use, please
        ** review the following information:
        ** http://www.trolltech.com/products/qt/licensing.html or contact the
        ** sales department at sales@trolltech.com.
        **
        ** 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)
            int numFrames;
            int frameTime;
            int avgRate;
            bool testDrawSpeed;
        #endif
        };

        #endif