libs/cpPipelineEditor/Canvas.cxx

   1 // -------------------------------------------------------------------------
   2 // @author Leonardo Florez-Valencia (florez-l@javeriana.edu.co)
   3 // -------------------------------------------------------------------------
   4
   5
   6 #include <iostream>
   7
   8
   9
  10
  11
  12 #include <cpPipelineEditor/Canvas.h>
  13 #include <cpPipelineEditor/FilterBlock.h>
  14 #include <cpPipelineEditor/FunctorBlock.h>
  15 #include <cpPipelineEditor/WidgetBlock.h>
  16
  17 #include <QDragEnterEvent>
  18 #include <QTreeWidget>
  19
  20 // -------------------------------------------------------------------------
  21 cpPipelineEditor::Canvas::
  22 Canvas( QWidget* parent )
  23   : Superclass( parent )
  24 {
  25   this->m_Scene = new QGraphicsScene( this );
  26   this->setScene( this->m_Scene );
  27   this->setRenderHint( QPainter::Antialiasing );
  28   this->setAcceptDrops( true );
  29 }
  30
  31 // -------------------------------------------------------------------------
  32 cpPipelineEditor::Canvas::
  33 ~Canvas( )
  34 {
  35 }
  36
  37 // -------------------------------------------------------------------------
  38 cpPipelineEditor::Block* cpPipelineEditor::Canvas::
  39 createBlock( const std::string& name )
  40 {
  41   QString str = name.c_str( );
  42   QStringList tokens = str.split( "@" );
  43   std::string block_type = tokens.back( ).toStdString( );
  44   Block* new_block = NULL;
  45   if( block_type == "Filters" )
  46     new_block = new FilterBlock( NULL, this->m_Scene );
  47   else if( block_type == "Functors" )
  48     new_block = new FunctorBlock( NULL, this->m_Scene );
  49   else if( block_type == "Widgets" )
  50     new_block = new WidgetBlock( NULL, this->m_Scene );
  51   return( new_block );
  52 }
  53
  54 // -------------------------------------------------------------------------
  55 void cpPipelineEditor::Canvas::
  56 dragEnterEvent( QDragEnterEvent* event )
  57 {
  58   const QMimeData* mime = event->mimeData( );
  59   if( mime->hasFormat( "application/x-qabstractitemmodeldatalist" ) )
  60     event->acceptProposedAction( );
  61 }
  62
  63 // -------------------------------------------------------------------------
  64 void cpPipelineEditor::Canvas::
  65 dragLeaveEvent( QDragLeaveEvent* event )
  66 {
  67 }
  68
  69 // -------------------------------------------------------------------------
  70 void cpPipelineEditor::Canvas::
  71 dragMoveEvent( QDragMoveEvent* event )
  72 {
  73 }
  74
  75 // -------------------------------------------------------------------------
  76 void cpPipelineEditor::Canvas::
  77 dropEvent( QDropEvent* event )
  78 {
  79   // Get dropped data
  80   const QMimeData* mime = event->mimeData( );
  81   if( !( mime->hasFormat( "application/x-qabstractitemmodeldatalist" ) ) )
  82     return;
  83   event->acceptProposedAction( );
  84   QTreeWidget* tree = dynamic_cast< QTreeWidget* >( event->source( ) );
  85   if( tree == NULL )
  86     return;
  87
  88   // Process dropped data
  89   QList< QTreeWidgetItem* > items = tree->selectedItems( );
  90   for( QTreeWidgetItem* item : items )
  91   {
  92     std::string name = "";
  93     QTreeWidgetItem* p = item;
  94     while( p != NULL )
  95     {
  96       name += p->text( 0 ).toStdString( ) + "@";
  97       p = p->parent( );
  98
  99     } // elihw
 100     name.resize( name.size( ) - 1 );
 101
 102     // Create block
 103     Block* b = this->createBlock( name );
 104
 105   } // rof
 106 }
 107
 108 // eof - $RCSfile$