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** contained in the Technology Preview License Agreement accompanying

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****************************************************************************/

#ifndef DOCUMENT_H

#define DOCUMENT_H

#include <QWidget>

QT_FORWARD_DECLARE_CLASS(QUndoStack)

QT_FORWARD_DECLARE_CLASS(QTextStream)

class Shape

{

public:

    enum Type { Rectangle, Circle, Triangle };

    Shape(Type type = Rectangle, const QColor &color = Qt::red, const QRect &rect = QRect());

    Type type() const;

    QString name() const;

    QRect rect() const;

    QRect resizeHandle() const;

    QColor color() const;

    static QString typeToString(Type type);

    static Type stringToType(const QString &s, bool *ok = 0);

    static const QSize minSize;

private:

    Type m_type;

    QRect m_rect;

    QColor m_color;

    QString m_name;

    friend class Document;

};

class Document : public QWidget

{

    Q_OBJECT

public:

    Document(QWidget *parent = 0);

    QString addShape(const Shape &shape);

    void deleteShape(const QString &shapeName);

    Shape shape(const QString &shapeName) const;

    QString currentShapeName() const;

    void setShapeRect(const QString &shapeName, const QRect &rect);

    void setShapeColor(const QString &shapeName, const QColor &color);

    bool load(QTextStream &stream);

    void save(QTextStream &stream);

    QString fileName() const;

    void setFileName(const QString &fileName);

    QUndoStack *undoStack() const;

signals:

    void currentShapeChanged(const QString &shapeName);

protected:

    void paintEvent(QPaintEvent *event);

    void mousePressEvent(QMouseEvent *event);

    void mouseReleaseEvent(QMouseEvent *event);

    void mouseMoveEvent(QMouseEvent *event);

private:

    void setCurrentShape(int index);

    int indexOf(const QString &shapeName) const;

    int indexAt(const QPoint &pos) const;

    QString uniqueName(const QString &name) const;

    QList<Shape> m_shapeList;

    int m_currentIndex;

    int m_mousePressIndex;

    QPoint m_mousePressOffset;

    bool m_resizeHandlePressed;

    QString m_fileName;

    QUndoStack *m_undoStack;

};

#endif // DOCUMENT_H