C++ (Cpp) QgsComposerLayerItem::setShowFeatureCount示例

示例#1

文件： qgscomposerlegendwidget.cpp 项目： hCivil/Quantum-GIS

void QgsComposerLegendWidget::on_mCountToolButton_clicked( bool checked )
{
  QgsDebugMsg( "Entered." );
  if ( !mLegend )
  {
    return;
  }

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

  //get current item
  QModelIndex currentIndex = mItemTreeView->currentIndex();
  if ( !currentIndex.isValid() )
  {
    return;
  }

  QStandardItem* currentItem = itemModel->itemFromIndex( currentIndex );
  if ( !currentItem )
  {
    return;
  }

  QgsComposerLayerItem* layerItem = dynamic_cast<QgsComposerLayerItem *>( currentItem );

  if ( !layerItem )
  {
    return;
  }

  mLegend->beginCommand( tr( "Legend updated" ) );
  layerItem->setShowFeatureCount( checked );
  if ( mLegend->model() )
  {
    mLegend->model()->updateItem( currentItem );
  }
  mLegend->update();
  mLegend->adjustBoxSize();
  mLegend->endCommand();
}