1 /****************************************************************************

     2 **

     3 ** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).

     4 ** All rights reserved.

     5 ** Contact: Nokia Corporation (qt-info@nokia.com)

     6 **

     7 ** This file is part of the demonstration applications of the Qt Toolkit.

     8 **

     9 ** $QT_BEGIN_LICENSE:LGPL$

    10 ** No Commercial Usage

    11 ** This file contains pre-release code and may not be distributed.

    12 ** You may use this file in accordance with the terms and conditions

    13 ** contained in the Technology Preview License Agreement accompanying

    14 ** this package.

    15 **

    16 ** GNU Lesser General Public License Usage

    17 ** Alternatively, this file may be used under the terms of the GNU Lesser

    18 ** General Public License version 2.1 as published by the Free Software

    19 ** Foundation and appearing in the file LICENSE.LGPL included in the

    20 ** packaging of this file.  Please review the following information to

    21 ** ensure the GNU Lesser General Public License version 2.1 requirements

    22 ** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.

    23 **

    24 ** In addition, as a special exception, Nokia gives you certain additional

    25 ** rights.  These rights are described in the Nokia Qt LGPL Exception

    26 ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.

    27 **

    28 ** If you have questions regarding the use of this file, please contact

    29 ** Nokia at qt-info@nokia.com.

    30 **

    31 **

    32 **

    33 **

    34 **

    35 **

    36 **

    37 **

    38 ** $QT_END_LICENSE$

    39 **

    40 ****************************************************************************/

    41 

    42 #ifndef DOCUMENT_H

    43 #define DOCUMENT_H

    44 

    45 #include <QWidget>

    46 

    47 QT_FORWARD_DECLARE_CLASS(QUndoStack)

    48 QT_FORWARD_DECLARE_CLASS(QTextStream)

    49 

    50 class Shape

    51 {

    52 public:

    53     enum Type { Rectangle, Circle, Triangle };

    54 

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

    56 

    57     Type type() const;

    58     QString name() const;

    59     QRect rect() const;

    60     QRect resizeHandle() const;

    61     QColor color() const;

    62 

    63     static QString typeToString(Type type);

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

    65 

    66     static const QSize minSize;

    67 

    68 private:

    69     Type m_type;

    70     QRect m_rect;

    71     QColor m_color;

    72     QString m_name;

    73 

    74     friend class Document;

    75 };

    76 

    77 class Document : public QWidget

    78 {

    79     Q_OBJECT

    80 

    81 public:

    82     Document(QWidget *parent = 0);

    83 

    84     QString addShape(const Shape &shape);

    85     void deleteShape(const QString &shapeName);

    86     Shape shape(const QString &shapeName) const;

    87     QString currentShapeName() const;

    88 

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

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

    91 

    92     bool load(QTextStream &stream);

    93     void save(QTextStream &stream);

    94 

    95     QString fileName() const;

    96     void setFileName(const QString &fileName);

    97 

    98     QUndoStack *undoStack() const;

    99 

   100 signals:

   101     void currentShapeChanged(const QString &shapeName);

   102 

   103 protected:

   104     void paintEvent(QPaintEvent *event);

   105     void mousePressEvent(QMouseEvent *event);

   106     void mouseReleaseEvent(QMouseEvent *event);

   107     void mouseMoveEvent(QMouseEvent *event);

   108 

   109 private:

   110     void setCurrentShape(int index);

   111     int indexOf(const QString &shapeName) const;

   112     int indexAt(const QPoint &pos) const;

   113     QString uniqueName(const QString &name) const;

   114 

   115     QList<Shape> m_shapeList;

   116     int m_currentIndex;

   117     int m_mousePressIndex;

   118     QPoint m_mousePressOffset;

   119     bool m_resizeHandlePressed;

   120     QString m_fileName;

   121 

   122     QUndoStack *m_undoStack;

   123 };

   124 

   125 #endif // DOCUMENT_H