C++ (Cpp) deleteHighlight示例

示例#1

文件： qgsrelationreferencewidget.cpp 项目： spatialthoughts/QGIS

QgsRelationReferenceWidget::~QgsRelationReferenceWidget()
{
  deleteHighlight();
  unsetMapTool();
  if ( mMapTool )
    delete mMapTool;
}

示例#2

文件： qgsrelationreferencewidget.cpp 项目： alexbruy/QGIS

void QgsRelationReferenceWidget::highlightFeature( QgsFeature f, CanvasExtent canvasExtent )
{
  if ( !mCanvas )
    return;

  if ( !f.isValid() )
  {
    f = referencedFeature();
    if ( !f.isValid() )
      return;
  }

  if ( !f.hasGeometry() )
  {
    return;
  }

  QgsGeometry geom = f.geometry();

  // scale or pan
  if ( canvasExtent == Scale )
  {
    QgsRectangle featBBox = geom.boundingBox();
    featBBox = mCanvas->mapSettings().layerToMapCoordinates( mReferencedLayer, featBBox );
    QgsRectangle extent = mCanvas->extent();
    if ( !extent.contains( featBBox ) )
    {
      extent.combineExtentWith( featBBox );
      extent.scale( 1.1 );
      mCanvas->setExtent( extent );
      mCanvas->refresh();
    }
  }
  else if ( canvasExtent == Pan )
  {
    QgsGeometry centroid = geom.centroid();
    QgsPointXY center = centroid.asPoint();
    center = mCanvas->mapSettings().layerToMapCoordinates( mReferencedLayer, center );
    mCanvas->zoomByFactor( 1.0, &center ); // refresh is done in this method
  }

  // highlight
  deleteHighlight();
  mHighlight = new QgsHighlight( mCanvas, f, mReferencedLayer );
  QgsIdentifyMenu::styleHighlight( mHighlight );
  mHighlight->show();

  QTimer *timer = new QTimer( this );
  timer->setSingleShot( true );
  connect( timer, &QTimer::timeout, this, &QgsRelationReferenceWidget::deleteHighlight );
  timer->start( 3000 );
}