src/qanGraphicsView.h

   1 /*
   2 Qanava - Graph drawing library for QT
   3 Copyright (C) 2006 Benoit AUTHEMAN
   4
   5 This library is free software; you can redistribute it and/or
   6 modify it under the terms of the GNU Lesser General Public
   7 License as published by the Free Software Foundation; either
   8 version 2.1 of the License, or (at your option) any later version.
   9
  10 This library is distributed in the hope that it will be useful,
  11 but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13 Lesser General Public License for more details.
  14
  15 You should have received a copy of the GNU Lesser General Public
  16 License along with this library; if not, write to the Free Software
  17 Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
  18 */
  19
  20 //-----------------------------------------------------------------------------
  21 // This file is a part of the Qanava software.
  22 //
  23 // \file        canGraphicsView.h
  24 // \author      Benoit Autheman (benoit@libqanava.org)
  25 // \date        2006 July 29
  26 //-----------------------------------------------------------------------------
  27
  28
  29 #ifndef canGraphicsView_h
  30 #define canGraphicsView_h
  31
  32
  33 // Qanava headers
  34 #include "./qanController.h"
  35
  36
  37 // QT headers
  38 #include <QGraphicsScene>
  39 #include <QGraphicsView>
  40 #include <QGraphicsItem>
  41
  42
  43 //-----------------------------------------------------------------------------
  44 namespace qan { // ::qan
  45
  46         class GridItem;
  47
  48         class GraphicsView : public QGraphicsView
  49         {
  50                 Q_OBJECT
  51
  52                 /*! \name GraphicsView Constructors/Destructors *///-------------------
  53                 //@{
  54         public:
  55
  56                 GraphicsView( QWidget* parent = 0 );
  57
  58                 GraphicsView( QGraphicsScene* scene, QWidget* parent = 0 );
  59
  60                 virtual QSize           sizeHint( ) const { return QSize( 300, 250 ); }
  61                 //@}
  62                 //---------------------------------------------------------------------
  63
  64
  65
  66                 /*! \name Grid Management *///-----------------------------------------
  67                 //@{
  68         public:
  69
  70                 void                    setGrid( GridItem* grid ) { _grid = grid; }
  71
  72                 GridItem*               getGrid( ) { return _grid; }
  73
  74         protected:
  75
  76                 virtual void    drawBackground( QPainter* painter, const QRectF& rect );
  77
  78         private:
  79
  80                 GridItem*               _grid;
  81                 //@}
  82                 //---------------------------------------------------------------------
  83
  84
  85
  86                 /*! \name View Controllers Management *///-----------------------------
  87                 //@{
  88         protected:
  89
  90                 virtual void            keyPressEvent( QKeyEvent* e );
  91
  92                 virtual void            mousePressEvent( QMouseEvent* e );
  93
  94                 virtual void            mouseReleaseEvent( QMouseEvent* e );
  95
  96                 virtual void            mouseMoveEvent( QMouseEvent* e );
  97
  98                 virtual void            mouseDoubleClickEvent( QMouseEvent* e );
  99
 100                 virtual void            wheelEvent( QWheelEvent* e );
 101
 102         signals:
 103
 104                 void                            itemDoubleClicked( QGraphicsItem* item );
 105
 106         public:
 107
 108                 //! Get this item view controller manager.
 109                 Controller::Manager&    getControllerManager( ) { return        _controllerManager; }
 110
 111                 //! Get the action for a controller with a given name.
 112                 QAction*                                getAction( QString name );
 113
 114         private:
 115
 116                 Controller::Manager             _controllerManager;
 117                 //@}
 118                 //---------------------------------------------------------------------
 119
 120
 121
 122                 /*! \name Zoom Management  *///----------------------------------------
 123                 //@{
 124         public:
 125
 126                 //! Set the maximum zoom factor that can be sets with the setZoomValue() method.
 127                 void                    setZoomMaxFactor( double zoomMaxFactor ) { _zoomMaxFactor = zoomMaxFactor; }
 128
 129                 double                  getZoom( ) const { return _zoom; }
 130
 131                 void                    setZoom( double zoom );
 132
 133         public slots:
 134
 135                 //! Set the current zoom factor value in percents (from 1 to 100, 100 sets the maximum zoom factor).
 136                 void                    setZoomPercent( int value );
 137
 138         private:
 139
 140                 double                  _zoom;
 141
 142                 //! Maximum zoom factor (default = 2).
 143                 double                  _zoomMaxFactor;
 144                 //@}
 145                 //---------------------------------------------------------------------
 146         };
 147 } // ::qan
 148 //-----------------------------------------------------------------------------
 149
 150
 151 #endif // canGraphicsView_h
 152