displayshape.h Example File
^{tools/qtdemo/displayshape.h}

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    **
    ** Copyright (C) 2005-2005 Trolltech AS. 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:
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** review the following information:
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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 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;
        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;
        qreal scale;
    };

    class DocumentShape : public DisplayShape
    {
    public:
        DocumentShape(const QString &text, const QFont &font, const QPen &pen,
                      const QPointF &position, const QSizeF &maxSize);
        ~DocumentShape();

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

    private:
        qreal formatText();

        QFont font;
        QStringList paragraphs;
        QList<QTextLayout*> layouts;
        QPen pen;
    };

    #endif