demos/undo/document.h
author Alex Gilkes <alex.gilkes@nokia.com>
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/****************************************************************************
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**
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** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
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** All rights reserved.
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** Contact: Nokia Corporation (qt-info@nokia.com)
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**
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** This file is part of the demonstration applications of the Qt Toolkit.
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**
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** $QT_BEGIN_LICENSE:LGPL$
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** No Commercial Usage
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** This file contains pre-release code and may not be distributed.
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** You may use this file in accordance with the terms and conditions
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** contained in the Technology Preview License Agreement accompanying
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** this package.
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**
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** GNU Lesser General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU Lesser
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** General Public License version 2.1 as published by the Free Software
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** Foundation and appearing in the file LICENSE.LGPL included in the
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** packaging of this file.  Please review the following information to
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** ensure the GNU Lesser General Public License version 2.1 requirements
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** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
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**
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** In addition, as a special exception, Nokia gives you certain additional
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** rights.  These rights are described in the Nokia Qt LGPL Exception
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
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**
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** If you have questions regarding the use of this file, please contact
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** Nokia at qt-info@nokia.com.
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**
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**
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**
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**
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**
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**
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**
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**
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#ifndef DOCUMENT_H
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#define DOCUMENT_H
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#include <QWidget>
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QT_FORWARD_DECLARE_CLASS(QUndoStack)
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QT_FORWARD_DECLARE_CLASS(QTextStream)
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class Shape
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{
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public:
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    enum Type { Rectangle, Circle, Triangle };
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    Shape(Type type = Rectangle, const QColor &color = Qt::red, const QRect &rect = QRect());
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    Type type() const;
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    QString name() const;
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    QRect rect() const;
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    QRect resizeHandle() const;
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    QColor color() const;
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    static QString typeToString(Type type);
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    static Type stringToType(const QString &s, bool *ok = 0);
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    static const QSize minSize;
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private:
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    Type m_type;
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    QRect m_rect;
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    QColor m_color;
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    QString m_name;
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    friend class Document;
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};
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class Document : public QWidget
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{
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    Q_OBJECT
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public:
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    Document(QWidget *parent = 0);
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    QString addShape(const Shape &shape);
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    void deleteShape(const QString &shapeName);
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    Shape shape(const QString &shapeName) const;
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    QString currentShapeName() const;
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    void setShapeRect(const QString &shapeName, const QRect &rect);
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    void setShapeColor(const QString &shapeName, const QColor &color);
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    bool load(QTextStream &stream);
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    void save(QTextStream &stream);
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    QString fileName() const;
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    void setFileName(const QString &fileName);
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    QUndoStack *undoStack() const;
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signals:
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    void currentShapeChanged(const QString &shapeName);
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protected:
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    void paintEvent(QPaintEvent *event);
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    void mousePressEvent(QMouseEvent *event);
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    void mouseReleaseEvent(QMouseEvent *event);
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    void mouseMoveEvent(QMouseEvent *event);
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private:
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    void setCurrentShape(int index);
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    int indexOf(const QString &shapeName) const;
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    int indexAt(const QPoint &pos) const;
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    QString uniqueName(const QString &name) const;
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    QList<Shape> m_shapeList;
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    int m_currentIndex;
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    int m_mousePressIndex;
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    QPoint m_mousePressOffset;
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    bool m_resizeHandlePressed;
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    QString m_fileName;
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    QUndoStack *m_undoStack;
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};
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#endif // DOCUMENT_H