appli/cpPipelineEditor/QNEConnection.cxx

   1 /* Copyright (c) 2012, STANISLAW ADASZEWSKI\r
   2    All rights reserved.\r
   3 \r
   4    Redistribution and use in source and binary forms, with or without\r
   5    modification, are permitted provided that the following conditions are met:\r
   6    * Redistributions of source code must retain the above copyright\r
   7    notice, this list of conditions and the following disclaimer.\r
   8    * Redistributions in binary form must reproduce the above copyright\r
   9    notice, this list of conditions and the following disclaimer in the\r
  10    documentation and/or other materials provided with the distribution.\r
  11    * Neither the name of STANISLAW ADASZEWSKI nor the\r
  12    names of its contributors may be used to endorse or promote products\r
  13    derived from this software without specific prior written permission.\r
  14 \r
  15    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND\r
  16    ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED\r
  17    WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE\r
  18    DISCLAIMED. IN NO EVENT SHALL STANISLAW ADASZEWSKI BE LIABLE FOR ANY\r
  19    DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES\r
  20    (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;\r
  21    LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND\r
  22    ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT\r
  23    (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS\r
  24    SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.\r
  25 */\r
  26 \r
  27 #include "QNEConnection.h"\r
  28 #include "QNEPort.h"\r
  29 \r
  30 #include <QBrush>\r
  31 #include <QPen>\r
  32 #include <QGraphicsScene>\r
  33 \r
  34 // -------------------------------------------------------------------------\r
  35 PipelineEditor::QNEConnection::\r
  36 QNEConnection( QGraphicsItem* parent, QGraphicsScene* scene )\r
  37   : Superclass( parent, scene )\r
  38 {\r
  39   this->setPen( QPen( Qt::black, 2 ) );\r
  40   this->setBrush( Qt::NoBrush );\r
  41   this->setZValue( -1 );\r
  42   this->m_Port1 = NULL;\r
  43   this->m_Port2 = NULL;\r
  44 }\r
  45 \r
  46 // -------------------------------------------------------------------------\r
  47 PipelineEditor::QNEConnection::\r
  48 ~QNEConnection( )\r
  49 {\r
  50   if( this->m_Port1 != NULL )\r
  51     this->m_Port1->connections( ).\r
  52       remove( this->m_Port1->connections( ).indexOf( this ) );\r
  53 \r
  54   if( this->m_Port2 != NULL )\r
  55     this->m_Port2->setConnection( NULL );\r
  56 }\r
  57 \r
  58 // -------------------------------------------------------------------------\r
  59 void PipelineEditor::QNEConnection::\r
  60 setPos1( const QPointF& p )\r
  61 {\r
  62   this->m_Pos1 = p;\r
  63 }\r
  64 \r
  65 // -------------------------------------------------------------------------\r
  66 void PipelineEditor::QNEConnection::\r
  67 setPos2( const QPointF& p )\r
  68 {\r
  69   this->m_Pos2 = p;\r
  70 }\r
  71 \r
  72 // -------------------------------------------------------------------------\r
  73 void PipelineEditor::QNEConnection::\r
  74 setPort1( QNEOutputPort* p )\r
  75 {\r
  76   if( p != NULL )\r
  77   {\r
  78     p->connections( ).append( this );\r
  79     this->m_Port1 = p;\r
  80 \r
  81   } // fi\r
  82 }\r
  83 \r
  84 // -------------------------------------------------------------------------\r
  85 void PipelineEditor::QNEConnection::\r
  86 setPort2( QNEInputPort* p )\r
  87 {\r
  88   if( p != NULL )\r
  89   {\r
  90     if( p->connection( ) == NULL )\r
  91     {\r
  92       p->setConnection( this );\r
  93       this->m_Port2 = p;\r
  94 \r
  95     } // fi\r
  96 \r
  97   } // fi\r
  98 }\r
  99 \r
 100 // -------------------------------------------------------------------------\r
 101 void PipelineEditor::QNEConnection::\r
 102 updatePosFromPorts( )\r
 103 {\r
 104   if( this->m_Port1 != NULL )\r
 105     this->m_Pos1 =\r
 106       this->m_Port1->scenePos( ) +\r
 107       QPointF( this->m_Port1->radius( ), this->m_Port1->radius( ) );\r
 108   if( this->m_Port2 != NULL )\r
 109     this->m_Pos2 =\r
 110       this->m_Port2->scenePos( ) +\r
 111       QPointF( this->m_Port2->radius( ), this->m_Port2->radius( ) );\r
 112 }\r
 113 \r
 114 // -------------------------------------------------------------------------\r
 115 void PipelineEditor::QNEConnection::\r
 116 updatePath( )\r
 117 {\r
 118   QPainterPath p;\r
 119   p.moveTo( this->m_Pos1 );\r
 120 \r
 121   qreal dx = this->m_Pos2.x( ) - this->m_Pos1.x( );\r
 122   qreal dy = this->m_Pos2.y( ) - this->m_Pos1.y( );\r
 123   QPointF c1( this->m_Pos1.x( ) + dx * 0.25, this->m_Pos1.y( ) + dy * 0.1 );\r
 124   QPointF c2( this->m_Pos1.x( ) + dx * 0.75, this->m_Pos1.y( ) + dy * 0.9 );\r
 125   p.cubicTo( c1, c2, this->m_Pos2 );\r
 126 \r
 127   this->setPath( p );\r
 128 }\r
 129 \r
 130 // -------------------------------------------------------------------------\r
 131 PipelineEditor::QNEOutputPort* PipelineEditor::QNEConnection::\r
 132 port1( ) const\r
 133 {\r
 134   return( this->m_Port1 );\r
 135 }\r
 136 \r
 137 // -------------------------------------------------------------------------\r
 138 PipelineEditor::QNEInputPort* PipelineEditor::QNEConnection::\r
 139 port2( ) const\r
 140 {\r
 141   return( this->m_Port2 );\r
 142 }\r
 143 \r
 144 // eof - $RCSfile$\r