lib/cpBaseQtApplication/Connection.cxx

   1 #include <cpBaseQtApplication/Connection.h>\r
   2 #include <cpBaseQtApplication/Port.h>\r
   3 \r
   4 #include <QBrush>\r
   5 #include <QGraphicsScene>\r
   6 #include <QPainter>\r
   7 #include <QPen>\r
   8 \r
   9 // -------------------------------------------------------------------------\r
  10 cpBaseQtApplication::Connection::\r
  11 Connection( QGraphicsItem* parent, QGraphicsScene* scene )\r
  12   : Superclass( parent, scene )\r
  13 {\r
  14   this->setPen( QPen( Qt::black, 2 ) );\r
  15   this->setBrush( Qt::NoBrush );\r
  16   this->setZValue( -1 );\r
  17   this->m_Port1 = NULL;\r
  18   this->m_Port2 = NULL;\r
  19   this->setFlag( QGraphicsItem::ItemIsSelectable );\r
  20 }\r
  21 \r
  22 // -------------------------------------------------------------------------\r
  23 cpBaseQtApplication::Connection::\r
  24 ~Connection( )\r
  25 {\r
  26   if( this->m_Port1 != NULL )\r
  27     this->m_Port1->connections( ).\r
  28       remove( this->m_Port1->connections( ).indexOf( this ) );\r
  29 \r
  30   if( this->m_Port2 != NULL )\r
  31     this->m_Port2->setConnection( NULL );\r
  32 }\r
  33 \r
  34 // -------------------------------------------------------------------------\r
  35 void cpBaseQtApplication::Connection::\r
  36 setPos1( const QPointF& p )\r
  37 {\r
  38   this->m_Pos1 = p;\r
  39 }\r
  40 \r
  41 // -------------------------------------------------------------------------\r
  42 void cpBaseQtApplication::Connection::\r
  43 setPos2( const QPointF& p )\r
  44 {\r
  45   this->m_Pos2 = p;\r
  46 }\r
  47 \r
  48 // -------------------------------------------------------------------------\r
  49 void cpBaseQtApplication::Connection::\r
  50 setPort1( OutputPort* p )\r
  51 {\r
  52   if( p != NULL )\r
  53   {\r
  54     p->connections( ).append( this );\r
  55     this->m_Port1 = p;\r
  56 \r
  57   } // fi\r
  58 }\r
  59 \r
  60 // -------------------------------------------------------------------------\r
  61 void cpBaseQtApplication::Connection::\r
  62 setPort2( InputPort* p )\r
  63 {\r
  64   if( p != NULL )\r
  65   {\r
  66     if( p->connection( ) == NULL )\r
  67     {\r
  68       p->setConnection( this );\r
  69       this->m_Port2 = p;\r
  70 \r
  71     } // fi\r
  72 \r
  73   } // fi\r
  74 }\r
  75 \r
  76 // -------------------------------------------------------------------------\r
  77 void cpBaseQtApplication::Connection::\r
  78 updatePosFromPorts( )\r
  79 {\r
  80   if( this->m_Port1 != NULL )\r
  81     this->m_Pos1 =\r
  82       this->m_Port1->scenePos( ) +\r
  83       QPointF( this->m_Port1->radius( ), this->m_Port1->radius( ) );\r
  84   if( this->m_Port2 != NULL )\r
  85     this->m_Pos2 =\r
  86       this->m_Port2->scenePos( ) +\r
  87       QPointF( this->m_Port2->radius( ), this->m_Port2->radius( ) );\r
  88 }\r
  89 \r
  90 // -------------------------------------------------------------------------\r
  91 void cpBaseQtApplication::Connection::\r
  92 updatePath( )\r
  93 {\r
  94   QPainterPath p;\r
  95   p.moveTo( this->m_Pos1 );\r
  96 \r
  97   qreal dx = this->m_Pos2.x( ) - this->m_Pos1.x( );\r
  98   qreal dy = this->m_Pos2.y( ) - this->m_Pos1.y( );\r
  99   QPointF c1( this->m_Pos1.x( ) + dx * 0.25, this->m_Pos1.y( ) + dy * 0.1 );\r
 100   QPointF c2( this->m_Pos1.x( ) + dx * 0.75, this->m_Pos1.y( ) + dy * 0.9 );\r
 101   p.cubicTo( c1, c2, this->m_Pos2 );\r
 102 \r
 103   this->setPath( p );\r
 104 }\r
 105 \r
 106 // -------------------------------------------------------------------------\r
 107 cpBaseQtApplication::OutputPort* cpBaseQtApplication::Connection::\r
 108 port1( ) const\r
 109 {\r
 110   return( this->m_Port1 );\r
 111 }\r
 112 \r
 113 // -------------------------------------------------------------------------\r
 114 cpBaseQtApplication::InputPort* cpBaseQtApplication::Connection::\r
 115 port2( ) const\r
 116 {\r
 117   return( this->m_Port2 );\r
 118 }\r
 119 \r
 120 // -------------------------------------------------------------------------\r
 121 void cpBaseQtApplication::Connection::\r
 122 paint(\r
 123   QPainter* painter,\r
 124   const QStyleOptionGraphicsItem* option,\r
 125   QWidget* widget\r
 126   )\r
 127 {\r
 128   Q_UNUSED( option );\r
 129   Q_UNUSED( widget );\r
 130 \r
 131   if( this->isSelected( ) )\r
 132     painter->setPen( QPen( Qt::red, 5 ) );\r
 133   else\r
 134     painter->setPen( QPen( Qt::black, 2 ) );\r
 135   this->setBrush( Qt::NoBrush );\r
 136   painter->drawPath( this->path( ) );\r
 137 }\r
 138 \r
 139 // eof - $RCSfile$\r