本文整理汇总了C++中QgsVectorLayer::removeSelection方法的典型用法代码示例。如果您正苦于以下问题：C++ QgsVectorLayer::removeSelection方法的具体用法？C++ QgsVectorLayer::removeSelection怎么用？C++ QgsVectorLayer::removeSelection使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类QgsVectorLayer的用法示例。
在下文中一共展示了QgsVectorLayer::removeSelection方法的2个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。
示例1: selectSingleFeature
void QgsMapToolSelectUtils::selectSingleFeature( QgsMapCanvas *canvas, const QgsGeometry &selectGeometry, Qt::KeyboardModifiers modifiers )
{
QgsVectorLayer *vlayer = QgsMapToolSelectUtils::getCurrentVectorLayer( canvas );
if ( !vlayer )
return;
QApplication::setOverrideCursor( Qt::WaitCursor );
QgsFeatureIds selectedFeatures = getMatchingFeatures( canvas, selectGeometry, false, true );
if ( selectedFeatures.isEmpty() )
{
if ( !( modifiers & Qt::ShiftModifier || modifiers & Qt::ControlModifier ) )
{
// if no modifiers then clicking outside features clears the selection
// but if there's a shift or ctrl modifier, then it's likely the user was trying
// to modify an existing selection by adding or subtracting features and just
// missed the feature
vlayer->removeSelection();
}
QApplication::restoreOverrideCursor();
return;
}
QgsVectorLayer::SelectBehavior behavior = QgsVectorLayer::SetSelection;
//either shift or control modifier switches to "toggle" selection mode
if ( modifiers & Qt::ShiftModifier || modifiers & Qt::ControlModifier )
{
QgsFeatureId selectId = *selectedFeatures.constBegin();
QgsFeatureIds layerSelectedFeatures = vlayer->selectedFeatureIds();
if ( layerSelectedFeatures.contains( selectId ) )
behavior = QgsVectorLayer::RemoveFromSelection;
else
behavior = QgsVectorLayer::AddToSelection;
}
vlayer->selectByIds( selectedFeatures, behavior );
QApplication::restoreOverrideCursor();
}示例2: select
/**
* Selection routine called by the mouse release event
* @param thePoint = QgsPoint representing the x, y coordinates of the mouse release event
*/
void eVisEventIdTool::select( QgsPoint thePoint )
{
if ( 0 == mCanvas )
return;
QgsVectorLayer* myLayer = ( QgsVectorLayer* )mCanvas->currentLayer( );
// create the search rectangle. this was modeled after the QgsMapIdentifyTool in core QGIS application
double searchWidth = mCanvas->extent( ).width( ) * (( double )QGis::DEFAULT_IDENTIFY_RADIUS / 100.0 );
QgsRectangle myRectangle;
myRectangle.setXMinimum( thePoint.x( ) - searchWidth );
myRectangle.setXMaximum( thePoint.x( ) + searchWidth );
myRectangle.setYMinimum( thePoint.y( ) - searchWidth );
myRectangle.setYMaximum( thePoint.y( ) + searchWidth );
//Transform rectange to map coordinates
myRectangle = toLayerCoordinates( myLayer, myRectangle );
//Rather than add to the current selection, clear all selected features
myLayer->removeSelection( false );
//select features
QgsFeatureIterator fit = myLayer->getFeatures( QgsFeatureRequest().setFilterRect( myRectangle ).setFlags( QgsFeatureRequest::ExactIntersect ).setSubsetOfAttributes( QgsAttributeList() ) );
QgsFeature f;
QgsFeatureIds newSelectedFeatures;
while ( fit.nextFeature( f ) )
{
newSelectedFeatures.insert( f.id() );
}
myLayer->setSelectedFeatures( newSelectedFeatures );
//Launch a new event browser to view selected features
mBrowser = new eVisGenericEventBrowserGui( mCanvas, mCanvas, NULL );
mBrowser->setAttribute( Qt::WA_DeleteOnClose );
}