Esempi in C++ (Cpp) per QgsMapCanvas::layers

Esempio n. 1

File: qgscomposerlegendwidget.cpp Progetto: hCivil/Quantum-GIS

void QgsComposerLegendWidget::on_mAddToolButton_clicked()
{
  if ( !mLegend )
  {
    return;
  }

  QStandardItemModel* itemModel = qobject_cast<QStandardItemModel *>( mItemTreeView->model() );
  if ( !itemModel )
  {
    return;
  }

  QgisApp* app = QgisApp::instance();
  if ( !app )
  {
    return;
  }

  QgsMapCanvas* canvas = app->mapCanvas();
  if ( canvas )
  {
    QList<QgsMapLayer*> layers = canvas->layers();

    QgsComposerLegendLayersDialog addDialog( layers );
    if ( addDialog.exec() == QDialog::Accepted )
    {
      QgsMapLayer* layer = addDialog.selectedLayer();
      if ( layer )
      {
        mLegend->beginCommand( "Legend item added" );
        mLegend->model()->addLayer( layer );
        mLegend->endCommand();
      }
    }
  }
}