src/playlist/PlaylistGraphicsView.cpp

   1 /***************************************************************************
   2  * copyright            : (C) 2007 Ian Monroe <ian@monroe.nu>              *
   3  *                                                                         *
   4  *   This program is free software; you can redistribute it and/or modify  *
   5  *   it under the terms of the GNU General Public License version 2        *
   6  *   as published by the Free Software Foundation.                         *
   7  ***************************************************************************/
   8
   9 #include "debug.h"
  10 #include "PlaylistModel.h"
  11 #include "PlaylistGraphicsItem.h"
  12 #include "PlaylistGraphicsView.h"
  13
  14 #include <QModelIndex>
  15 #include <QGraphicsScene>
  16
  17 PlaylistNS::GraphicsView::GraphicsView( QWidget* parent, PlaylistNS::Model* model )
  18     : QGraphicsView( parent )
  19     , m_model( model )
  20 {
  21     DEBUG_BLOCK
  22     setScene( new QGraphicsScene() );
  23     rowsInserted( QModelIndex(), 0, m_model->rowCount() - 1);
  24     connect( m_model, SIGNAL( modelReset() ), this, SLOT( modelReset() ) );
  25     connect( m_model, SIGNAL( rowsInserted( const QModelIndex&, int, int ) ), this, SLOT( rowsInserted( const QModelIndex &, int, int ) ) );
  26     connect( m_model, SIGNAL( rowsRemoved( const QModelIndex&, int, int ) ), this, SLOT( rowsRemoved( const QModelIndex&, int, int ) ) );
  27     connect( m_model, SIGNAL( dataChanged( const QModelIndex&, const QModelIndex& ) ), this, SLOT( dataChanged( const QModelIndex& ) ) );
  28     show();
  29 }
  30
  31 void
  32 PlaylistNS::GraphicsView::rowsInserted( const QModelIndex& parent, int start, int end )
  33 {
  34     Q_UNUSED( parent );
  35     for( int i = start; i <= end; i++ )
  36     {
  37         PlaylistNS::GraphicsItem* item = new PlaylistNS::GraphicsItem();
  38         item->setPos( 0.0, PlaylistNS::GraphicsItem::height() * i );
  39         scene()->addItem( item );
  40         m_tracks.insert( i, item  );
  41     }
  42 }
  43
  44 void
  45 PlaylistNS::GraphicsView::rowsRemoved(const QModelIndex& parent, int start, int end )
  46 {
  47     Q_UNUSED( parent );
  48     for( int i = end; i >= start; i-- )
  49         delete m_tracks.takeAt( i );
  50 }
  51
  52 void
  53 PlaylistNS::GraphicsView::modelReset()
  54 {
  55     foreach( PlaylistNS::GraphicsItem* it, m_tracks )
  56     {
  57         delete it;
  58     }
  59     m_tracks.clear();
  60 }
  61
  62
  63 void
  64 PlaylistNS::GraphicsView::dataChanged(const QModelIndex & index)
  65 {
  66      DEBUG_BLOCK
  67      if ( !index.isValid() )
  68         return;
  69
  70      if ( m_tracks.count() > index.row() )
  71          m_tracks[ index.row() ]->refresh();
  72 }
  73
  74 #include "PlaylistGraphicsView.moc"