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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 [email protected].
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 ** 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 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