void Qgs25DRenderer::startRender( QgsRenderContext& context, const QgsFields& fields )
{
QgsExpressionContextScope* scope = new QgsExpressionContextScope( "2.5D Renderer" );
scope->setVariable( "qgis_25d_height", mHeight.expressionOrField() );
scope->setVariable( "qgis_25d_angle", mAngle );
context.expressionContext().appendScope( scope );
mSymbol->startRender( context, &fields );
}
QgsExpressionContextScope *QgsExpressionContextUtils::composerItemScope( const QgsComposerItem *composerItem )
{
QgsExpressionContextScope* scope = new QgsExpressionContextScope( QObject::tr( "Composer Item" ) );
if ( !composerItem )
return scope;
//add variables defined in composer item properties
QStringList variableNames = composerItem->customProperty( "variableNames" ).toStringList();
QStringList variableValues = composerItem->customProperty( "variableValues" ).toStringList();
int varIndex = 0;
Q_FOREACH ( const QString& variableName, variableNames )
{
if ( varIndex >= variableValues.length() )
{
break;
}
QVariant varValue = variableValues.at( varIndex );
varIndex++;
scope->setVariable( variableName, varValue );
}
//add known composer item context variables
scope->addVariable( QgsExpressionContextScope::StaticVariable( "item_id", composerItem->id(), true ) );
scope->addVariable( QgsExpressionContextScope::StaticVariable( "item_uuid", composerItem->uuid(), true ) );
scope->addVariable( QgsExpressionContextScope::StaticVariable( "layout_page", composerItem->page(), true ) );
return scope;
}
QgsExpressionContextScope *QgsExpressionContextUtils::compositionScope( const QgsComposition *composition )
{
QgsExpressionContextScope* scope = new QgsExpressionContextScope( QObject::tr( "Composition" ) );
if ( !composition )
return scope;
//add variables defined in composition properties
QStringList variableNames = composition->customProperty( "variableNames" ).toStringList();
QStringList variableValues = composition->customProperty( "variableValues" ).toStringList();
int varIndex = 0;
Q_FOREACH ( const QString& variableName, variableNames )
{
if ( varIndex >= variableValues.length() )
{
break;
}
QVariant varValue = variableValues.at( varIndex );
varIndex++;
scope->setVariable( variableName, varValue );
}
//add known composition context variables
scope->addVariable( QgsExpressionContextScope::StaticVariable( "layout_numpages", composition->numPages(), true ) );
scope->addVariable( QgsExpressionContextScope::StaticVariable( "layout_pageheight", composition->paperHeight(), true ) );
scope->addVariable( QgsExpressionContextScope::StaticVariable( "layout_pagewidth", composition->paperWidth(), true ) );
scope->addVariable( QgsExpressionContextScope::StaticVariable( "layout_dpi", composition->printResolution(), true ) );
return scope;
}
QgsExpressionContextScope* QgsExpressionContextUtils::projectScope()
{
QgsProject* project = QgsProject::instance();
QgsExpressionContextScope* scope = new QgsExpressionContextScope( QObject::tr( "Project" ) );
//add variables defined in project file
QStringList variableNames = project->readListEntry( "Variables", "/variableNames" );
QStringList variableValues = project->readListEntry( "Variables", "/variableValues" );
int varIndex = 0;
Q_FOREACH ( const QString& variableName, variableNames )
{
if ( varIndex >= variableValues.length() )
{
break;
}
QString varValueString = variableValues.at( varIndex );
varIndex++;
scope->setVariable( variableName, varValueString );
}
//add other known project variables
scope->addVariable( QgsExpressionContextScope::StaticVariable( "project_title", project->title(), true ) );
scope->addVariable( QgsExpressionContextScope::StaticVariable( "project_path", project->fileInfo().filePath(), true ) );
scope->addVariable( QgsExpressionContextScope::StaticVariable( "project_folder", project->fileInfo().dir().path(), true ) );
scope->addVariable( QgsExpressionContextScope::StaticVariable( "project_filename", project->fileInfo().fileName(), true ) );
scope->addFunction( "project_color", new GetNamedProjectColor() );
return scope;
}
QgsExpressionContextScope* QgsExpressionContextUtils::projectScope( const QgsProject* project )
{
QgsExpressionContextScope* scope = new QgsExpressionContextScope( QObject::tr( "Project" ) );
if ( !project )
return scope;
const QVariantMap vars = project->customVariables();
QVariantMap::const_iterator it = vars.constBegin();
for ( ; it != vars.constEnd(); ++it )
{
scope->setVariable( it.key(), it.value() );
}
//add other known project variables
scope->addVariable( QgsExpressionContextScope::StaticVariable( QStringLiteral( "project_title" ), project->title(), true ) );
scope->addVariable( QgsExpressionContextScope::StaticVariable( QStringLiteral( "project_path" ), project->fileInfo().filePath(), true ) );
scope->addVariable( QgsExpressionContextScope::StaticVariable( QStringLiteral( "project_folder" ), project->fileInfo().dir().path(), true ) );
scope->addVariable( QgsExpressionContextScope::StaticVariable( QStringLiteral( "project_filename" ), project->fileInfo().fileName(), true ) );
QgsCoordinateReferenceSystem projectCrs = project->crs();
scope->addVariable( QgsExpressionContextScope::StaticVariable( QStringLiteral( "project_crs" ), projectCrs.authid(), true ) );
scope->addVariable( QgsExpressionContextScope::StaticVariable( QStringLiteral( "project_crs_definition" ), projectCrs.toProj4(), true ) );
scope->addFunction( QStringLiteral( "project_color" ), new GetNamedProjectColor() );
return scope;
}
void QgsActionManager::doAction( int index, const QgsFeature& feat, int defaultValueIndex )
{
QgsExpressionContext context = createExpressionContext();
QgsExpressionContextScope* actionScope = new QgsExpressionContextScope();
actionScope->setVariable( "current_field", feat.attribute( defaultValueIndex ) );
context << actionScope;
doAction( index, feat, context );
}
QgsExpressionContextScope* QgsExpressionContextUtils::globalScope()
{
QgsExpressionContextScope* scope = new QgsExpressionContextScope( QObject::tr( "Global" ) );
//read values from QSettings
QSettings settings;
//check if settings contains any variables
if ( settings.contains( QString( "/variables/values" ) ) )
{
QList< QVariant > customVariableVariants = settings.value( QString( "/variables/values" ) ).toList();
QList< QVariant > customVariableNames = settings.value( QString( "/variables/names" ) ).toList();
int variableIndex = 0;
for ( QList< QVariant >::const_iterator it = customVariableVariants.constBegin();
it != customVariableVariants.constEnd(); ++it )
{
if ( variableIndex >= customVariableNames.length() )
{
break;
}
QVariant value = ( *it );
QString name = customVariableNames.at( variableIndex ).toString();
scope->setVariable( name, value );
variableIndex++;
}
}
//add some extra global variables
scope->addVariable( QgsExpressionContextScope::StaticVariable( "qgis_version", QGis::QGIS_VERSION, true ) );
scope->addVariable( QgsExpressionContextScope::StaticVariable( "qgis_version_no", QGis::QGIS_VERSION_INT, true ) );
scope->addVariable( QgsExpressionContextScope::StaticVariable( "qgis_release_name", QGis::QGIS_RELEASE_NAME, true ) );
scope->addVariable( QgsExpressionContextScope::StaticVariable( "qgis_platform", QgsApplication::platform(), true ) );
scope->addVariable( QgsExpressionContextScope::StaticVariable( "qgis_os_name", QgsApplication::osName(), true ) );
scope->addVariable( QgsExpressionContextScope::StaticVariable( "user_account_name", QgsApplication::userLoginName(), true ) );
scope->addVariable( QgsExpressionContextScope::StaticVariable( "user_full_name", QgsApplication::userFullName(), true ) );
return scope;
}
QgsExpressionContextScope* QgsExpressionContextUtils::layerScope( const QgsMapLayer* layer )
{
QgsExpressionContextScope* scope = new QgsExpressionContextScope( QObject::tr( "Layer" ) );
if ( !layer )
return scope;
//add variables defined in layer properties
QStringList variableNames = layer->customProperty( QStringLiteral( "variableNames" ) ).toStringList();
QStringList variableValues = layer->customProperty( QStringLiteral( "variableValues" ) ).toStringList();
int varIndex = 0;
Q_FOREACH ( const QString& variableName, variableNames )
{
if ( varIndex >= variableValues.length() )
{
break;
}
QVariant varValue = variableValues.at( varIndex );
varIndex++;
scope->setVariable( variableName, varValue );
}
scope->addVariable( QgsExpressionContextScope::StaticVariable( QStringLiteral( "layer_name" ), layer->name(), true ) );
scope->addVariable( QgsExpressionContextScope::StaticVariable( QStringLiteral( "layer_id" ), layer->id(), true ) );
scope->addVariable( QgsExpressionContextScope::StaticVariable( QStringLiteral( "layer" ), QVariant::fromValue<QPointer<QgsMapLayer> >( QPointer<QgsMapLayer>( const_cast<QgsMapLayer*>( layer ) ) ), true ) );
const QgsVectorLayer* vLayer = dynamic_cast< const QgsVectorLayer* >( layer );
if ( vLayer )
{
scope->setFields( vLayer->fields() );
}
//TODO - add functions. Possibilities include:
//is_selected
//field summary stats
return scope;
}
QgsExpressionContextScope* QgsExpressionContextUtils::globalScope()
{
QgsExpressionContextScope* scope = new QgsExpressionContextScope( QObject::tr( "Global" ) );
QVariantMap customVariables = QgsApplication::customVariables();
for ( QVariantMap::const_iterator it = customVariables.constBegin(); it != customVariables.constEnd(); ++it )
{
scope->setVariable( it.key(), it.value() );
}
//add some extra global variables
scope->addVariable( QgsExpressionContextScope::StaticVariable( QStringLiteral( "qgis_version" ), Qgis::QGIS_VERSION, true ) );
scope->addVariable( QgsExpressionContextScope::StaticVariable( QStringLiteral( "qgis_version_no" ), Qgis::QGIS_VERSION_INT, true ) );
scope->addVariable( QgsExpressionContextScope::StaticVariable( QStringLiteral( "qgis_release_name" ), Qgis::QGIS_RELEASE_NAME, true ) );
scope->addVariable( QgsExpressionContextScope::StaticVariable( QStringLiteral( "qgis_platform" ), QgsApplication::platform(), true ) );
scope->addVariable( QgsExpressionContextScope::StaticVariable( QStringLiteral( "qgis_os_name" ), QgsApplication::osName(), true ) );
scope->addVariable( QgsExpressionContextScope::StaticVariable( QStringLiteral( "user_account_name" ), QgsApplication::userLoginName(), true ) );
scope->addVariable( QgsExpressionContextScope::StaticVariable( QStringLiteral( "user_full_name" ), QgsApplication::userFullName(), true ) );
return scope;
}
bool QgsMapToolFeatureAction::doAction( QgsVectorLayer *layer, int x, int y )
{
if ( !layer )
return false;
QgsPoint point = mCanvas->getCoordinateTransform()->toMapCoordinates( x, y );
QgsFeatureList featList;
// toLayerCoordinates will throw an exception for an 'invalid' point.
// For example, if you project a world map onto a globe using EPSG 2163
// and then click somewhere off the globe, an exception will be thrown.
try
{
// create the search rectangle
double searchRadius = searchRadiusMU( mCanvas );
QgsRectangle r;
r.setXMinimum( point.x() - searchRadius );
r.setXMaximum( point.x() + searchRadius );
r.setYMinimum( point.y() - searchRadius );
r.setYMaximum( point.y() + searchRadius );
r = toLayerCoordinates( layer, r );
QgsFeatureIterator fit = layer->getFeatures( QgsFeatureRequest().setFilterRect( r ).setFlags( QgsFeatureRequest::ExactIntersect ) );
QgsFeature f;
while ( fit.nextFeature( f ) )
featList << QgsFeature( f );
}
catch ( QgsCsException & cse )
{
Q_UNUSED( cse );
// catch exception for 'invalid' point and proceed with no features found
QgsDebugMsg( QString( "Caught CRS exception %1" ).arg( cse.what() ) );
}
if ( featList.isEmpty() )
return false;
Q_FOREACH ( const QgsFeature& feat, featList )
{
if ( layer->actions()->defaultAction() >= 0 )
{
// define custom substitutions: layer id and clicked coords
QgsExpressionContext context;
context << QgsExpressionContextUtils::globalScope()
<< QgsExpressionContextUtils::projectScope()
<< QgsExpressionContextUtils::mapSettingsScope( mCanvas->mapSettings() );
QgsExpressionContextScope* actionScope = new QgsExpressionContextScope();
actionScope->setVariable( "click_x", point.x() );
actionScope->setVariable( "click_y", point.y() );
context << actionScope;
int actionIdx = layer->actions()->defaultAction();
layer->actions()->doAction( actionIdx, feat, context );
}
else
{
QgsMapLayerAction* mapLayerAction = QgsMapLayerActionRegistry::instance()->defaultActionForLayer( layer );
if ( mapLayerAction )
{
mapLayerAction->triggerForFeature( layer, &feat );
}
}
}
return true;
}
