lib/cpPipelineEditor/Canvas.cxx

   1 #include "Canvas.h"
   2 #include "Editor.h"
   3 #include "Block.h"
   4 #include "Connection.h"
   5 #include "Port.h"
   6
   7 #include <QDragEnterEvent>
   8 #include <QWheelEvent>
   9 #include <QTreeWidget>
  10
  11 // -------------------------------------------------------------------------
  12 cpPipelineEditor::Canvas::
  13 Canvas( QWidget* parent )
  14   : QGraphicsView( parent )
  15 {
  16   QGraphicsScene* scene = new QGraphicsScene( this );
  17   this->setScene( scene );
  18   this->setRenderHint( QPainter::Antialiasing );
  19   this->setAcceptDrops( true );
  20
  21   this->m_Editor = new Editor( this );
  22   this->m_Editor->install( scene );
  23 }
  24
  25 // -------------------------------------------------------------------------
  26 cpPipelineEditor::Canvas::
  27 ~Canvas( )
  28 {
  29 }
  30
  31 // -------------------------------------------------------------------------
  32 cpPipelineEditor::
  33 Editor* cpPipelineEditor::Canvas::
  34 editor( )
  35 {
  36   return( this->m_Editor );
  37 }
  38
  39 // -------------------------------------------------------------------------
  40 const cpPipelineEditor::
  41 Editor* cpPipelineEditor::Canvas::
  42 editor( ) const
  43 {
  44   return( this->m_Editor );
  45 }
  46
  47 // -------------------------------------------------------------------------
  48 void cpPipelineEditor::Canvas::
  49 wheelEvent( QWheelEvent* event )
  50 {
  51   this->_scaleView(
  52     std::pow( double( 2 ), event->delta( ) / double( 240 ) )
  53     );
  54 }
  55
  56 // -------------------------------------------------------------------------
  57 void cpPipelineEditor::Canvas::
  58 dragEnterEvent( QDragEnterEvent* event )
  59 {
  60   const QMimeData* mime = event->mimeData( );
  61   if( mime->hasFormat( "application/x-qabstractitemmodeldatalist" ) )
  62     event->acceptProposedAction( );
  63 }
  64
  65 // -------------------------------------------------------------------------
  66 void cpPipelineEditor::Canvas::
  67 dragLeaveEvent( QDragLeaveEvent* event )
  68 {
  69 }
  70
  71 // -------------------------------------------------------------------------
  72 void cpPipelineEditor::Canvas::
  73 dragMoveEvent( QDragMoveEvent* event )
  74 {
  75 }
  76
  77 // -------------------------------------------------------------------------
  78 void cpPipelineEditor::Canvas::
  79 dropEvent( QDropEvent* event )
  80 {
  81   const QMimeData* mime = event->mimeData( );
  82   if( !( mime->hasFormat( "application/x-qabstractitemmodeldatalist" ) ) )
  83     return;
  84
  85   event->acceptProposedAction( );
  86   auto tree = dynamic_cast< QTreeWidget* >( event->source( ) );
  87   if( tree == NULL )
  88     return;
  89
  90   QList< QTreeWidgetItem* > items = tree->selectedItems( );
  91   for( auto iIt = items.begin( ); iIt != items.end( ); ++iIt )
  92     this->m_Editor->createFilter(
  93       ( *iIt )->text( 0 ).toStdString( ), this->mapToScene( event->pos( ) )
  94       );
  95 }
  96
  97 // -------------------------------------------------------------------------
  98 void cpPipelineEditor::Canvas::
  99 _scaleView( qreal scaleFactor )
 100 {
 101   qreal factor = this->transform( ).
 102     scale( scaleFactor, scaleFactor ).
 103     mapRect( QRectF( 0, 0, 1, 1 ) ).
 104     width( );
 105   if( factor < qreal( 0.07 ) || factor > qreal( 100 ) )
 106     return;
 107   this->scale( scaleFactor, scaleFactor );
 108 }
 109
 110 // eof - $RCSfile$