lib/cpBaseQtApplication/Canvas.cxx

   1 #include <cpBaseQtApplication/Canvas.h>
   2 #include <cpBaseQtApplication/Editor.h>
   3 #include <cpBaseQtApplication/Block.h>
   4 #include <cpBaseQtApplication/Connection.h>
   5 #include <cpBaseQtApplication/Port.h>
   6
   7 #include <QDragEnterEvent>
   8 #include <QWheelEvent>
   9 #include <QTreeWidget>
  10
  11 // -------------------------------------------------------------------------
  12 cpBaseQtApplication::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 cpBaseQtApplication::Canvas::
  27 ~Canvas( )
  28 {
  29 }
  30
  31 // -------------------------------------------------------------------------
  32 cpBaseQtApplication::
  33 Editor* cpBaseQtApplication::Canvas::
  34 editor( )
  35 {
  36   return( this->m_Editor );
  37 }
  38
  39 // -------------------------------------------------------------------------
  40 const cpBaseQtApplication::
  41 Editor* cpBaseQtApplication::Canvas::
  42 editor( ) const
  43 {
  44   return( this->m_Editor );
  45 }
  46
  47 // -------------------------------------------------------------------------
  48 void cpBaseQtApplication::Canvas::
  49 keyPressEvent( QKeyEvent* event )
  50 {
  51   static const int del_key = 16777223;
  52   if( event->key( ) == del_key )
  53   {
  54     auto _items = this->items( );
  55     auto i = _items.begin( );
  56     while( i != _items.end( ) )
  57     {
  58       if( ( *i )->isSelected( ) )
  59       {
  60         Block* b = dynamic_cast< Block* >( *i );
  61         Connection* c = dynamic_cast< Connection* >( *i );
  62         if( b != NULL )
  63         {
  64           if( this->m_Editor->deleteFilter( b->namePort( ).toStdString( ) ) )
  65             delete b;
  66         }
  67         else if( c != NULL )
  68         {
  69           if(
  70             this->m_Editor->deleteConnection(
  71               c->port1( )->block( )->namePort( ).toStdString( ),
  72               c->port2( )->block( )->namePort( ).toStdString( ),
  73               c->port1( )->name( ).toStdString( ),
  74               c->port2( )->name( ).toStdString( )
  75               )
  76             )
  77             delete c;
  78
  79         } // fi
  80         i = _items.end( );
  81       }
  82       else
  83         i++;
  84
  85     } // elihw
  86
  87   } // fi
  88 }
  89
  90 // -------------------------------------------------------------------------
  91 void cpBaseQtApplication::Canvas::
  92 wheelEvent( QWheelEvent* event )
  93 {
  94   this->_scaleView(
  95     std::pow( double( 2 ), event->delta( ) / double( 240 ) )
  96     );
  97 }
  98
  99 // -------------------------------------------------------------------------
 100 void cpBaseQtApplication::Canvas::
 101 dragEnterEvent( QDragEnterEvent* event )
 102 {
 103   const QMimeData* mime = event->mimeData( );
 104   if( mime->hasFormat( "application/x-qabstractitemmodeldatalist" ) )
 105     event->acceptProposedAction( );
 106 }
 107
 108 // -------------------------------------------------------------------------
 109 void cpBaseQtApplication::Canvas::
 110 dragLeaveEvent( QDragLeaveEvent* event )
 111 {
 112 }
 113
 114 // -------------------------------------------------------------------------
 115 void cpBaseQtApplication::Canvas::
 116 dragMoveEvent( QDragMoveEvent* event )
 117 {
 118 }
 119
 120 // -------------------------------------------------------------------------
 121 void cpBaseQtApplication::Canvas::
 122 dropEvent( QDropEvent* event )
 123 {
 124   const QMimeData* mime = event->mimeData( );
 125   if( !( mime->hasFormat( "application/x-qabstractitemmodeldatalist" ) ) )
 126     return;
 127
 128   event->acceptProposedAction( );
 129   auto tree = dynamic_cast< QTreeWidget* >( event->source( ) );
 130   if( tree == NULL )
 131     return;
 132
 133   QList< QTreeWidgetItem* > items = tree->selectedItems( );
 134   for( auto iIt = items.begin( ); iIt != items.end( ); ++iIt )
 135   {
 136     auto parent = ( *iIt )->parent( );
 137     if( parent != NULL )
 138       this->m_Editor->createFilter(
 139         parent->text( 0 ).toStdString( ),
 140         ( *iIt )->text( 0 ).toStdString( ),
 141         this->mapToScene( event->pos( ) )
 142         );
 143
 144   } // rof
 145 }
 146
 147 // -------------------------------------------------------------------------
 148 void cpBaseQtApplication::Canvas::
 149 _scaleView( qreal scaleFactor )
 150 {
 151   qreal factor = this->transform( ).
 152     scale( scaleFactor, scaleFactor ).
 153     mapRect( QRectF( 0, 0, 1, 1 ) ).
 154     width( );
 155   if( factor < qreal( 0.07 ) || factor > qreal( 100 ) )
 156     return;
 157   this->scale( scaleFactor, scaleFactor );
 158 }
 159
 160 // eof - $RCSfile$