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

     /****************************************************************************
     **
     ** Copyright (C) 2005-2007 Trolltech ASA. All rights reserved.
     **
     ** This file is part of the example classes 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 DISPLAYSHAPE_H
     #define DISPLAYSHAPE_H

     #include <QBrush>
     #include <QFont>
     #include <QHash>
     #include <QPainterPath>
     #include <QPen>
     #include <QPointF>
     #include <QSizeF>
     #include <QWidget>

     class DisplayShape
     {
     public:
         DisplayShape(const QPointF &position, const QSizeF &maxSize);
         virtual ~DisplayShape() {};

         virtual bool animate();
         virtual bool contains(const QString &key) const;
         virtual bool isInteractive() const;
         virtual QVariant metaData(const QString &key) const;
         virtual void paint(QPainter *painter) const;
         virtual QPointF position() const;
         virtual QPointF target() const;
         virtual QRectF rect() const;
         virtual QSizeF size() const;
         virtual void removeMetaData(const QString &key);
         virtual void setInteractive(bool enable);
         virtual void setMetaData(const QString &key, const QVariant &value);
         virtual void setPosition(const QPointF &point);
         virtual void setSize(const QSizeF &size);
         virtual void setTarget(const QPointF &point);

     protected:
         QHash<QString,QVariant> meta;
         QImage image;
         QPointF pos;
         QPointF targetPos;
         QSizeF maxSize;
         bool interactive;
     };

     class PanelShape : public DisplayShape
     {
     public:
         PanelShape(const QPainterPath &path, const QBrush &normal,
                   const QBrush &highlighted, const QPen &pen,
                   const QPointF &position, const QSizeF &maxSize);

         bool animate();
         void paint(QPainter *painter) const;
         QRectF rect() const;

     private:
         QBrush brush;
         QBrush highlightedBrush;
         QBrush normalBrush;
         QPainterPath path;
         QPen pen;
     };

     class TitleShape : public DisplayShape
     {
     public:
         TitleShape(const QString &text, const QFont &font, const QPen &pen,
                    const QPointF &position, const QSizeF &maxSize,
                    Qt::Alignment alignment = Qt::AlignVCenter | Qt::AlignLeft);

         bool animate();
         void paint(QPainter *painter) const;
         QRectF rect() const;

     private:
         QFont font;
         QString text;
         QPen pen;
         QPointF baselineStart;
         QRectF textRect;
         Qt::Alignment alignment;
     };

     class ImageShape : public DisplayShape
     {
     public:
         ImageShape(const QImage &original, const QPointF &position,
                    const QSizeF &maxSize, int alpha = 0,
                    Qt::Alignment alignment = Qt::AlignCenter);

         bool animate();
         void paint(QPainter *painter) const;
         QRectF rect() const;

     private:
         void redraw();

         int alpha;
         QImage source;
         QPointF offset;
         Qt::Alignment alignment;
     };

     class DocumentShape : public DisplayShape
     {
     public:
         DocumentShape(const QString &text, const QFont &font,
                       const QPointF &position, const QSizeF &maxSize,
                       int alpha = 0);
         ~DocumentShape();

         bool animate();
         void paint(QPainter *painter) const;
         QRectF rect() const;

     private:
         void redraw();

         QImage source;
         int alpha;
         QTextDocument textDocument;
     };

     #endif