src/qanEdgeItem.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        qanEdgeItem.h
  24 // \author      Benoit Autheman (benoit@libqanava.org)
  25 // \date        2007 February 08
  26 //-----------------------------------------------------------------------------
  27
  28
  29 #ifndef qanEdgeItem_h
  30 #define qanEdgeItem_h
  31
  32
  33 // Qanava headers
  34 #include "./qanNode.h"
  35 #include "./qanStyle.h"
  36
  37
  38 // QT headers
  39 #include <QGraphicsItem>
  40
  41
  42 //-----------------------------------------------------------------------------
  43 namespace qan { // ::qan
  44
  45         class NodeItem;
  46
  47         class GraphItem : public QObject
  48         {
  49                 Q_OBJECT
  50
  51         public:
  52
  53                 GraphItem( Style::Manager& styleManager ) :
  54                         _styleManager( styleManager ), _style( 0 ) { }
  55
  56                 GraphItem( Style::Manager& styleManager, Style* style ) :
  57                         _styleManager( styleManager ), _style( 0 ) { setStyle( style ); }
  58
  59                 void                                    setStyle( Style* style )
  60                 {
  61                         if ( _style != 0 )              // Disconnect the previous style from this item slots
  62                                 _style->disconnect( SIGNAL( modified( ) ), this, SLOT( updateItem( ) ) );
  63                         if ( style != 0 )
  64                                 connect( style, SIGNAL( modified( ) ), this, SLOT( updateItem( ) ) );
  65                         _style = style;
  66                 }
  67
  68                 Style*                                  getStyle( ) { return _style; }
  69
  70                 Style::Manager&                 getStyleManager( ) { return _styleManager; }
  71
  72                 const Style::Manager&   getStyleManager( ) const { return _styleManager; }
  73
  74                 virtual QGraphicsItem*  getGraphicsItem( ) = 0;
  75
  76         protected slots:
  77
  78                 virtual void                    updateItem( ) { }
  79
  80         protected:
  81
  82                 Style*                          _style;
  83
  84                 Style::Manager&         _styleManager;
  85         };
  86
  87
  88         class EdgeItem : public GraphItem, public QGraphicsItem
  89         {
  90                 Q_OBJECT
  91
  92         public:
  93
  94                 EdgeItem( Style::Manager& styleManager, Style* style, QGraphicsItem* parent, QGraphicsScene* scene,
  95                                   Edge& edge, NodeItem* src, NodeItem* dst );
  96
  97                 virtual ~EdgeItem( );
  98
  99                 virtual QGraphicsItem*  getGraphicsItem( ) { return this; }
 100
 101                 QRectF                  boundingRect( ) const;
 102
 103                 void                    paint( QPainter* painter, const QStyleOptionGraphicsItem* option, QWidget* widget = 0 );
 104
 105                 virtual void    updateItem( );
 106
 107                 void                    disconnectEdge( );
 108
 109                 NodeItem*               getSrc( ) { return _src; }
 110
 111                 NodeItem*               getDst( ) { return _dst; }
 112
 113         public slots:
 114
 115                 void                    nodeDestroyed( );
 116
 117         private:
 118
 119                 Edge&           _edge;
 120
 121                 NodeItem*       _src;
 122
 123                 NodeItem*       _dst;
 124
 125                 QPointF         _sourcePoint;
 126
 127                 QPointF         _destinationPoint;
 128
 129                 bool            _hasArrow;
 130
 131                 int                     _arrowSize;
 132
 133                 int                     _lineType;
 134
 135                 int                     _lineWeight;
 136
 137                 QRectF          _labelRect;
 138         };
 139 } // ::qan
 140 //-----------------------------------------------------------------------------
 141
 142
 143 #endif // qanEdgeItem_h
 144