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
  53   switch( event->key( ) )
  54   {
  55   case del_key:
  56   {
  57     auto _items = this->items( );
  58     auto i = _items.begin( );
  59     while( i != _items.end( ) )
  60     {
  61       if( ( *i )->isSelected( ) )
  62       {
  63         Block* b = dynamic_cast< Block* >( *i );
  64         Connection* c = dynamic_cast< Connection* >( *i );
  65         if( b != NULL )
  66         {
  67           if( this->m_Editor->deleteFilter( b->namePort( ).toStdString( ) ) )
  68             delete b;
  69         }
  70         else if( c != NULL )
  71         {
  72           if(
  73             this->m_Editor->deleteConnection(
  74               c->port1( )->block( )->namePort( ).toStdString( ),
  75               c->port2( )->block( )->namePort( ).toStdString( ),
  76               c->port1( )->name( ).toStdString( ),
  77               c->port2( )->name( ).toStdString( )
  78               )
  79             )
  80             delete c;
  81
  82         } // fi
  83         i = _items.end( );
  84       }
  85       else
  86         i++;
  87
  88     } // elihw
  89   }
  90   break;
  91   default:
  92     break;
  93   } // hctiws
  94 }
  95
  96 // -------------------------------------------------------------------------
  97 void cpBaseQtApplication::Canvas::
  98 wheelEvent( QWheelEvent* event )
  99 {
 100   this->_scaleView(
 101     std::pow( double( 2 ), event->delta( ) / double( 240 ) )
 102     );
 103 }
 104
 105 // -------------------------------------------------------------------------
 106 void cpBaseQtApplication::Canvas::
 107 dragEnterEvent( QDragEnterEvent* event )
 108 {
 109   const QMimeData* mime = event->mimeData( );
 110   if( mime->hasFormat( "application/x-qabstractitemmodeldatalist" ) )
 111     event->acceptProposedAction( );
 112 }
 113
 114 // -------------------------------------------------------------------------
 115 void cpBaseQtApplication::Canvas::
 116 dragLeaveEvent( QDragLeaveEvent* event )
 117 {
 118 }
 119
 120 // -------------------------------------------------------------------------
 121 void cpBaseQtApplication::Canvas::
 122 dragMoveEvent( QDragMoveEvent* event )
 123 {
 124 }
 125
 126 // -------------------------------------------------------------------------
 127 void cpBaseQtApplication::Canvas::
 128 dropEvent( QDropEvent* event )
 129 {
 130   const QMimeData* mime = event->mimeData( );
 131   if( !( mime->hasFormat( "application/x-qabstractitemmodeldatalist" ) ) )
 132     return;
 133   event->acceptProposedAction( );
 134   auto tree = dynamic_cast< QTreeWidget* >( event->source( ) );
 135   if( tree == NULL )
 136     return;
 137
 138   QPointF p = this->mapToScene( event->pos( ) );
 139   QList< QTreeWidgetItem* > items = tree->selectedItems( );
 140   for( auto iIt = items.begin( ); iIt != items.end( ); ++iIt )
 141   {
 142     auto parent = ( *iIt )->parent( );
 143     if( parent != NULL )
 144     {
 145       std::string category = parent->text( 0 ).toStdString( );
 146       std::string filter = ( *iIt )->text( 0 ).toStdString( );
 147       this->m_Editor->createFilter( category, filter, p );
 148
 149     } // fi
 150
 151   } // rof
 152 }
 153
 154 // -------------------------------------------------------------------------
 155 void cpBaseQtApplication::Canvas::
 156 _scaleView( qreal scaleFactor )
 157 {
 158   qreal factor = this->transform( ).
 159     scale( scaleFactor, scaleFactor ).
 160     mapRect( QRectF( 0, 0, 1, 1 ) ).
 161     width( );
 162   if( factor < qreal( 0.07 ) || factor > qreal( 100 ) )
 163     return;
 164   this->scale( scaleFactor, scaleFactor );
 165 }
 166
 167 // eof - $RCSfile$