appli/cpPipelineEditor/Edge.cxx

   1 #include "Edge.h"
   2 #include "Node.h"
   3
   4 // -------------------------------------------------------------------------
   5 PipelineEditor::Edge::
   6 Edge( PipelineEditor::Node* src, PipelineEditor::Node* des )
   7   : QGraphicsItem( NULL ),
   8     m_ArrowSize( 10 )
   9 {
  10   this->setAcceptedMouseButtons( 0 );
  11   this->m_Source = src;
  12   this->m_Destination = des;
  13   this->m_Source->addEdge( this );
  14   this->m_Destination->addEdge( this );
  15   // TODO: this->setToolTip( "Edge!!!" );
  16   this->adjust( );
  17 }
  18
  19 // -------------------------------------------------------------------------
  20 PipelineEditor::Edge::
  21 ~Edge( )
  22 {
  23 }
  24
  25 // -------------------------------------------------------------------------
  26 PipelineEditor::Node* PipelineEditor::Edge::
  27 sourceNode( ) const
  28 {
  29   return( this->m_Source );
  30 }
  31
  32 // -------------------------------------------------------------------------
  33 PipelineEditor::Node* PipelineEditor::Edge::
  34 destinationNode( ) const
  35 {
  36   return( this->m_Destination );
  37 }
  38
  39 // -------------------------------------------------------------------------
  40 void PipelineEditor::Edge::
  41 adjust( )
  42 {
  43   if( this->m_Source == NULL || this->m_Destination == NULL )
  44     return;
  45
  46   QLineF line(
  47     mapFromItem( this->m_Source, 0, 0 ),
  48     mapFromItem( this->m_Destination, 0, 0 )
  49     );
  50   qreal length = line.length( );
  51
  52   this->prepareGeometryChange( );
  53
  54   if( length > qreal( 20 ) )
  55   {
  56     QPointF edgeOffset(
  57       ( line.dx( ) * qreal( 10 ) ) / length,
  58       ( line.dy( ) * qreal( 10 ) ) / length
  59       );
  60     this->m_SourcePoint = line.p1( ) + edgeOffset;
  61     this->m_DestinationPoint = line.p2( ) - edgeOffset;
  62   }
  63   else
  64     this->m_SourcePoint = this->m_DestinationPoint = line.p1( );
  65 }
  66
  67 // -------------------------------------------------------------------------
  68 QRectF PipelineEditor::Edge::
  69 boundingRect( ) const
  70 {
  71   if( this->m_Source == NULL || this->m_Destination == NULL )
  72     return( QRectF( ) );
  73
  74   qreal penWidth = 1;
  75   qreal extra = ( penWidth + this->m_ArrowSize ) / qreal( 2 );
  76
  77   return(
  78     QRectF(
  79       this->m_SourcePoint,
  80       QSizeF(
  81         this->m_DestinationPoint.x( ) - this->m_SourcePoint.x( ),
  82         this->m_DestinationPoint.y( ) - this->m_SourcePoint.y( )
  83         )
  84       ).normalized( ).adjusted( -extra, -extra, extra, extra )
  85     );
  86 }
  87
  88 // -------------------------------------------------------------------------
  89 void PipelineEditor::Edge::
  90 paint(
  91   QPainter* painter, const QStyleOptionGraphicsItem* option, QWidget* widget
  92   )
  93 {
  94   /* TODO
  95   if (!source || !dest)
  96       return;
  97
  98     QLineF line(sourcePoint, destPoint);
  99     if (qFuzzyCompare(line.length(), qreal(0.)))
 100         return;
 101
 102     // Draw the line itself
 103     painter->setPen(QPen(Qt::black, 1, Qt::SolidLine, Qt::RoundCap, Qt::RoundJoin));
 104     painter->drawLine(line);
 105
 106     // Draw the arrows
 107     double angle = ::acos(line.dx() / line.length());
 108     if (line.dy() >= 0)
 109         angle = TwoPi - angle;
 110
 111     QPointF destArrowP1 = destPoint + QPointF(
 112       sin(angle - Pi / 3) * arrowSize,
 113       cos(angle - Pi / 3) * arrowSize
 114       );
 115     QPointF destArrowP2 = destPoint + QPointF(
 116       sin(angle - Pi + Pi / 3) * arrowSize,
 117       cos(angle - Pi + Pi / 3) * arrowSize
 118       );
 119     QPointF center = sourcePoint + destPoint;
 120     center /= 2;
 121
 122     painter->setBrush(Qt::black);
 123     painter->drawPolygon(QPolygonF() << line.p2() << destArrowP1 << destArrowP2);
 124     painter->drawText( center, "Edge!!!" );
 125   */
 126 }
 127
 128 // eof - $RCSfile$