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