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

        /****************************************************************************
        **
        ** Copyright (C) 2005-2005 Trolltech AS. All rights reserved.
        **
        ** This file is part of the documentation of the Qt Toolkit.
        **
        ** This file may be distributed and/or modified under the terms of the
    ** GNU General Public License version 2 as published by the Free Software
    ** Foundation and appearing in the file LICENSE.GPL included in the
    ** packaging of this file.
    **
    ** See http://www.trolltech.com/pricing.html or email sales@trolltech.com for
    ** information about Qt Commercial License Agreements.
    ** See http://www.trolltech.com/gpl/ for GPL licensing information.
    **
    ** 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.
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        #ifndef DISPLAYWIDGET_H
        #define DISPLAYWIDGET_H

        #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);

        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 slots:
            void updateShapes();

        private:
            bool empty;
            bool emptying;
            QList<DisplayShape*> shapes;
            QTimer *timer;
        };

        #endif