QgsMapLayerActionRegistry is no longer a singleton

Moved the global instance to QgsGui::QgsMapLayerActionRegistry()

doc/api_break.dox

@@ -1445,6 +1445,13 @@ screenUpdateRequested() were removed. These members have had no effect for a num
 - the invalidTransformInput() slot was removed - calling this slot had no effect
 - metadata() was renamed to htmlMetadata()
 
+
+QgsMapLayerActionRegistry        {#qgis_api_break_3_0_QgsMapLayerActionRegistry}
+-------------------------
+
+- This class is no longer a singleton and instance() has been removed. Instead use QgsGui::mapLayerActionRegistry().
+
+
 QgsMapOverviewCanvas        {#qgis_api_break_3_0_QgsMapOverviewCanvas}
 --------------------
 

python/gui/qgsgui.sip

@@ -49,6 +49,12 @@ class QgsGui
  :rtype: QgsLayerTreeEmbeddedWidgetRegistry
 %End
 
+    static QgsMapLayerActionRegistry *mapLayerActionRegistry();
+%Docstring
+ Returns the global map layer action registry, used for registering map layer actions.
+ :rtype: QgsMapLayerActionRegistry
+%End
+
     ~QgsGui();
 
   private:

python/gui/qgsmaplayeractionregistry.sip

@@ -64,8 +64,8 @@ class QgsMapLayerActionRegistry : QObject
 %End
 
   public:
-    //! Returns the instance pointer, creating the object on the first call
-    static QgsMapLayerActionRegistry *instance();
+
+    QgsMapLayerActionRegistry( QObject *parent = 0 );
 
     ~QgsMapLayerActionRegistry();
 
@@ -83,10 +83,6 @@ class QgsMapLayerActionRegistry : QObject
     /** Returns the default action for a layer*/
     QgsMapLayerAction *defaultActionForLayer( QgsMapLayer *layer );
 
-  protected:
-    //! protected constructor
-    QgsMapLayerActionRegistry( QObject *parent = 0 );
-
   signals:
     /** Triggered when an action is added or removed from the registry */
     void changed();

src/app/qgisapp.cpp

@@ -942,7 +942,7 @@ QgisApp::QgisApp( QSplashScreen *splash, bool restorePlugins, bool skipVersionCh
 
   activateDeactivateLayerRelatedActions( nullptr ); // after members were created
 
-  connect( QgsMapLayerActionRegistry::instance(), &QgsMapLayerActionRegistry::changed, this, &QgisApp::refreshActionFeatureAction );
+  connect( QgsGui::mapLayerActionRegistry(), &QgsMapLayerActionRegistry::changed, this, &QgisApp::refreshActionFeatureAction );
 
   // set application's caption
   QString caption = tr( "QGIS - %1 ('%2')" ).arg( Qgis::QGIS_VERSION, Qgis::QGIS_RELEASE_NAME );
@@ -6288,7 +6288,7 @@ void QgisApp::updateDefaultFeatureAction( QAction *action )
   if ( qgsAction.isValid() )
   {
     vlayer->actions()->setDefaultAction( QStringLiteral( "Canvas" ), qgsAction.id() );
-    QgsMapLayerActionRegistry::instance()->setDefaultActionForLayer( vlayer, nullptr );
+    QgsGui::mapLayerActionRegistry()->setDefaultActionForLayer( vlayer, nullptr );
 
     mActionFeatureAction->setToolTip( tr( "Run feature action<br><b>%1</b>" ).arg( qgsAction.name() ) );
 
@@ -6303,7 +6303,7 @@ void QgisApp::updateDefaultFeatureAction( QAction *action )
     QgsMapLayerAction *mapLayerAction = qobject_cast<QgsMapLayerAction *>( action );
     if ( mapLayerAction )
     {
-      QgsMapLayerActionRegistry::instance()->setDefaultActionForLayer( vlayer, mapLayerAction );
+      QgsGui::mapLayerActionRegistry()->setDefaultActionForLayer( vlayer, mapLayerAction );
 
       if ( !mapLayerAction->text().isEmpty() )
         mActionFeatureAction->setToolTip( tr( "Run feature action<br><b>%1</b>" ).arg( mapLayerAction->text() ) );
@@ -6313,7 +6313,7 @@ void QgisApp::updateDefaultFeatureAction( QAction *action )
     }
     else
     {
-      QgsMapLayerActionRegistry::instance()->setDefaultActionForLayer( vlayer, nullptr );
+      QgsGui::mapLayerActionRegistry()->setDefaultActionForLayer( vlayer, nullptr );
     }
   }
 }
@@ -6340,7 +6340,7 @@ void QgisApp::refreshFeatureActions()
   }
 
   //add actions registered in QgsMapLayerActionRegistry
-  QList<QgsMapLayerAction *> registeredActions = QgsMapLayerActionRegistry::instance()->mapLayerActions( vlayer );
+  QList<QgsMapLayerAction *> registeredActions = QgsGui::mapLayerActionRegistry()->mapLayerActions( vlayer );
   if ( !actions.isEmpty() && registeredActions.size() > 0 )
   {
     //add a separator between user defined and standard actions
@@ -6350,7 +6350,7 @@ void QgisApp::refreshFeatureActions()
   for ( int i = 0; i < registeredActions.size(); i++ )
   {
     mFeatureActionMenu->addAction( registeredActions.at( i ) );
-    if ( registeredActions.at( i ) == QgsMapLayerActionRegistry::instance()->defaultActionForLayer( vlayer ) )
+    if ( registeredActions.at( i ) == QgsGui::mapLayerActionRegistry()->defaultActionForLayer( vlayer ) )
     {
       mFeatureActionMenu->setActiveAction( registeredActions.at( i ) );
     }
@@ -7296,7 +7296,7 @@ void QgisApp::setupLayoutManagerConnections()
       QgsMapLayerAction *action = mAtlasFeatureActions.value( c );
       if ( action )
       {
-        QgsMapLayerActionRegistry::instance()->removeMapLayerAction( action );
+        QgsGui::mapLayerActionRegistry()->removeMapLayerAction( action );
         delete action;
         mAtlasFeatureActions.remove( c );
       }
@@ -7309,7 +7309,7 @@ void QgisApp::setupAtlasMapLayerAction( QgsComposition *composition, bool enable
   QgsMapLayerAction *action = mAtlasFeatureActions.value( composition );
   if ( action )
   {
-    QgsMapLayerActionRegistry::instance()->removeMapLayerAction( action );
+    QgsGui::mapLayerActionRegistry()->removeMapLayerAction( action );
     delete action;
     action = nullptr;
     mAtlasFeatureActions.remove( composition );
@@ -7321,7 +7321,7 @@ void QgisApp::setupAtlasMapLayerAction( QgsComposition *composition, bool enable
                                     this, composition->atlasComposition().coverageLayer(), QgsMapLayerAction::SingleFeature,
                                     QgsApplication::getThemeIcon( QStringLiteral( "/mIconAtlas.svg" ) ) );
     mAtlasFeatureActions.insert( composition, action );
-    QgsMapLayerActionRegistry::instance()->addMapLayerAction( action );
+    QgsGui::mapLayerActionRegistry()->addMapLayerAction( action );
     connect( action, &QgsMapLayerAction::triggeredForFeature, this, [this, composition]( QgsMapLayer * layer, const QgsFeature & feat )
     {
       setCompositionAtlasFeature( composition, layer, feat );
@@ -11160,7 +11160,7 @@ void QgisApp::activateDeactivateLayerRelatedActions( QgsMapLayer *layer )
 
     bool isEditable = vlayer->isEditable();
     bool layerHasSelection = vlayer->selectedFeatureCount() > 0;
-    bool layerHasActions = !vlayer->actions()->actions( QStringLiteral( "Canvas" ) ).isEmpty() || !QgsMapLayerActionRegistry::instance()->mapLayerActions( vlayer ).isEmpty();
+    bool layerHasActions = !vlayer->actions()->actions( QStringLiteral( "Canvas" ) ).isEmpty() || !QgsGui::mapLayerActionRegistry()->mapLayerActions( vlayer ).isEmpty();
     bool isSpatial = vlayer->isSpatial();
 
     mActionLocalHistogramStretch->setEnabled( false );
@@ -11458,7 +11458,7 @@ void QgisApp::refreshActionFeatureAction()
   if ( !vlayer )
     return;
 
-  bool layerHasActions = !vlayer->actions()->actions( QStringLiteral( "Canvas" ) ).isEmpty() || !QgsMapLayerActionRegistry::instance()->mapLayerActions( vlayer ).isEmpty();
+  bool layerHasActions = !vlayer->actions()->actions( QStringLiteral( "Canvas" ) ).isEmpty() || !QgsGui::mapLayerActionRegistry()->mapLayerActions( vlayer ).isEmpty();
   mActionFeatureAction->setEnabled( layerHasActions );
 }
 

src/app/qgsidentifyresultsdialog.cpp

@@ -483,7 +483,7 @@ void QgsIdentifyResultsDialog::addFeature( QgsVectorLayer *vlayer, const QgsFeat
   }
 
   //get valid QgsMapLayerActions for this layer
-  QList< QgsMapLayerAction * > registeredActions = QgsMapLayerActionRegistry::instance()->mapLayerActions( vlayer );
+  QList< QgsMapLayerAction * > registeredActions = QgsGui::mapLayerActionRegistry()->mapLayerActions( vlayer );
   QList<QgsAction> actions = vlayer->actions()->actions( QStringLiteral( "Feature" ) );
 
   if ( !vlayer->fields().isEmpty() || !actions.isEmpty() || !registeredActions.isEmpty() )
@@ -1096,7 +1096,7 @@ void QgsIdentifyResultsDialog::contextMenuEvent( QContextMenuEvent *event )
   if ( featItem && vlayer )
   {
     //get valid QgsMapLayerActions for this layer
-    QList< QgsMapLayerAction * > registeredActions = QgsMapLayerActionRegistry::instance()->mapLayerActions( vlayer );
+    QList< QgsMapLayerAction * > registeredActions = QgsGui::mapLayerActionRegistry()->mapLayerActions( vlayer );
 
     if ( !registeredActions.isEmpty() )
     {

src/app/qgsmaptoolfeatureaction.cpp

@@ -31,6 +31,7 @@
 #include "qgsproject.h"
 #include "qgsmaplayeractionregistry.h"
 #include "qgisapp.h"
+#include "qgsgui.h"
 
 #include <QSettings>
 #include <QMouseEvent>
@@ -72,7 +73,7 @@ void QgsMapToolFeatureAction::canvasReleaseEvent( QgsMapMouseEvent *e )
   }
 
   QgsVectorLayer *vlayer = qobject_cast<QgsVectorLayer *>( layer );
-  if ( vlayer->actions()->actions( QStringLiteral( "Canvas" ) ).isEmpty() && QgsMapLayerActionRegistry::instance()->mapLayerActions( vlayer ).isEmpty() )
+  if ( vlayer->actions()->actions( QStringLiteral( "Canvas" ) ).isEmpty() && QgsGui::mapLayerActionRegistry()->mapLayerActions( vlayer ).isEmpty() )
   {
     emit messageEmitted( tr( "The active vector layer has no defined actions" ), QgsMessageBar::INFO );
     return;
@@ -146,7 +147,7 @@ bool QgsMapToolFeatureAction::doAction( QgsVectorLayer *layer, int x, int y )
     }
     else
     {
-      QgsMapLayerAction *mapLayerAction = QgsMapLayerActionRegistry::instance()->defaultActionForLayer( layer );
+      QgsMapLayerAction *mapLayerAction = QgsGui::mapLayerActionRegistry()->defaultActionForLayer( layer );
       if ( mapLayerAction )
       {
         mapLayerAction->triggerForFeature( layer, &feat );

src/gui/attributetable/qgsattributetableview.cpp

@@ -34,6 +34,7 @@
 #include "qgsfeatureselectionmodel.h"
 #include "qgsmaplayeractionregistry.h"
 #include "qgsfeatureiterator.h"
+#include "qgsgui.h"
 
 QgsAttributeTableView::QgsAttributeTableView( QWidget *parent )
   : QTableView( parent )
@@ -67,7 +68,7 @@ QgsAttributeTableView::QgsAttributeTableView( QWidget *parent )
   connect( verticalHeader(), &QHeaderView::sectionEntered, this, &QgsAttributeTableView::_q_selectRow );
   connect( horizontalHeader(), &QHeaderView::sectionResized, this, &QgsAttributeTableView::columnSizeChanged );
   connect( horizontalHeader(), &QHeaderView::sortIndicatorChanged, this, &QgsAttributeTableView::showHorizontalSortIndicator );
-  connect( QgsMapLayerActionRegistry::instance(), &QgsMapLayerActionRegistry::changed, this, &QgsAttributeTableView::recreateActionWidgets );
+  connect( QgsGui::mapLayerActionRegistry(), &QgsMapLayerActionRegistry::changed, this, &QgsAttributeTableView::recreateActionWidgets );
 }
 
 bool QgsAttributeTableView::eventFilter( QObject *object, QEvent *event )
@@ -196,7 +197,7 @@ QWidget *QgsAttributeTableView::createActionWidget( QgsFeatureId fid )
 
   // next add any registered actions for this layer
   Q_FOREACH ( QgsMapLayerAction *mapLayerAction,
-              QgsMapLayerActionRegistry::instance()->mapLayerActions( mFilterModel->layer(),
+              QgsGui::mapLayerActionRegistry()->mapLayerActions( mFilterModel->layer(),
                   QgsMapLayerAction::SingleFeature ) )
   {
     QAction *action = new QAction( mapLayerAction->icon(), mapLayerAction->text(), container );
@@ -208,7 +209,7 @@ QWidget *QgsAttributeTableView::createActionWidget( QgsFeatureId fid )
     actionList << action;
 
     if ( !defaultAction &&
-         QgsMapLayerActionRegistry::instance()->defaultActionForLayer( mFilterModel->layer() ) == mapLayerAction )
+         QgsGui::mapLayerActionRegistry()->defaultActionForLayer( mFilterModel->layer() ) == mapLayerAction )
       defaultAction = action;
   }
 

src/gui/attributetable/qgsdualview.cpp

@@ -479,7 +479,7 @@ void QgsDualView::viewWillShowContextMenu( QMenu *menu, const QModelIndex &atInd
   }
 
   //add actions from QgsMapLayerActionRegistry to context menu
-  QList<QgsMapLayerAction *> registeredActions = QgsMapLayerActionRegistry::instance()->mapLayerActions( mLayer );
+  QList<QgsMapLayerAction *> registeredActions = QgsGui::mapLayerActionRegistry()->mapLayerActions( mLayer );
   if ( !registeredActions.isEmpty() )
   {
     //add a separator between user defined and standard actions

src/gui/qgsactionmenu.cpp

@@ -18,6 +18,7 @@
 #include "qgsmaplayeractionregistry.h"
 #include "qgsactionmanager.h"
 #include "qgsfeatureiterator.h"
+#include "qgsgui.h"
 
 QgsActionMenu::QgsActionMenu( QgsVectorLayer *layer, const QgsFeature &feature, const QString &actionScope, QWidget  *parent )
   : QMenu( parent )
@@ -42,7 +43,7 @@ void QgsActionMenu::init()
 {
   setTitle( tr( "&Actions" ) );
 
-  connect( QgsMapLayerActionRegistry::instance(), &QgsMapLayerActionRegistry::changed, this, &QgsActionMenu::reloadActions );
+  connect( QgsGui::mapLayerActionRegistry(), &QgsMapLayerActionRegistry::changed, this, &QgsActionMenu::reloadActions );
 
   reloadActions();
 }
@@ -123,7 +124,7 @@ void QgsActionMenu::reloadActions()
     addAction( qAction );
   }
 
-  QList<QgsMapLayerAction *> mapLayerActions = QgsMapLayerActionRegistry::instance()->mapLayerActions( mLayer, QgsMapLayerAction::SingleFeature );
+  QList<QgsMapLayerAction *> mapLayerActions = QgsGui::mapLayerActionRegistry()->mapLayerActions( mLayer, QgsMapLayerAction::SingleFeature );
 
   if ( !mapLayerActions.isEmpty() )
   {

src/gui/qgsgui.cpp

@@ -18,6 +18,7 @@
 #include "qgsgui.h"
 #include "qgseditorwidgetregistry.h"
 #include "qgslayertreeembeddedwidgetregistry.h"
+#include "qgsmaplayeractionregistry.h"
 #include "qgsshortcutsmanager.h"
 
 QgsGui *QgsGui::instance()
@@ -41,16 +42,23 @@ QgsLayerTreeEmbeddedWidgetRegistry *QgsGui::layerTreeEmbeddedWidgetRegistry()
   return instance()->mLayerTreeEmbeddedWidgetRegistry;
 }
 
+QgsMapLayerActionRegistry *QgsGui::mapLayerActionRegistry()
+{
+  return instance()->mMapLayerActionRegistry;
+}
+
 QgsGui::~QgsGui()
 {
+  delete mLayerTreeEmbeddedWidgetRegistry;
   delete mEditorWidgetRegistry;
+  delete mMapLayerActionRegistry;
   delete mShortcutsManager;
-  delete mLayerTreeEmbeddedWidgetRegistry;
 }
 
 QgsGui::QgsGui()
 {
   mEditorWidgetRegistry = new QgsEditorWidgetRegistry();
   mShortcutsManager = new QgsShortcutsManager();
   mLayerTreeEmbeddedWidgetRegistry = new QgsLayerTreeEmbeddedWidgetRegistry();
+  mMapLayerActionRegistry = new QgsMapLayerActionRegistry();
 }

src/gui/qgsgui.h

@@ -23,6 +23,7 @@
 class QgsEditorWidgetRegistry;
 class QgsShortcutsManager;
 class QgsLayerTreeEmbeddedWidgetRegistry;
+class QgsMapLayerActionRegistry;
 
 /**
  * \ingroup gui
@@ -60,6 +61,11 @@ class GUI_EXPORT QgsGui
      */
     static QgsLayerTreeEmbeddedWidgetRegistry *layerTreeEmbeddedWidgetRegistry();
 
+    /**
+     * Returns the global map layer action registry, used for registering map layer actions.
+     */
+    static QgsMapLayerActionRegistry *mapLayerActionRegistry();
+
     ~QgsGui();
 
   private:
@@ -69,6 +75,7 @@ class GUI_EXPORT QgsGui
     QgsEditorWidgetRegistry *mEditorWidgetRegistry = nullptr;
     QgsShortcutsManager *mShortcutsManager = nullptr;
     QgsLayerTreeEmbeddedWidgetRegistry *mLayerTreeEmbeddedWidgetRegistry = nullptr;
+    QgsMapLayerActionRegistry *mMapLayerActionRegistry = nullptr;
 
 #ifdef SIP_RUN
     QgsGui( const QgsGui &other );

src/gui/qgsidentifymenu.cpp

@@ -24,11 +24,11 @@
 #include "qgsvectorlayer.h"
 #include "qgslogger.h"
 #include "qgssettings.h"
-
+#include "qgsgui.h"
 
 /// @cond PRIVATE
-CustomActionRegistry::CustomActionRegistry( QObject *parent )
-  : QgsMapLayerActionRegistry( parent )
+CustomActionRegistry::CustomActionRegistry()
+  : QgsMapLayerActionRegistry()
 {
 }
 ///@endcond
@@ -43,7 +43,6 @@ QgsIdentifyMenu::QgsIdentifyMenu( QgsMapCanvas *canvas )
   , mMaxLayerDisplay( 10 )
   , mMaxFeatureDisplay( 10 )
   , mDefaultActionName( tr( "Identify" ) )
-  , mCustomActionRegistry( CustomActionRegistry::instance() )
 {
 }
 
@@ -178,7 +177,7 @@ void QgsIdentifyMenu::addRasterLayer( QgsMapLayer *layer )
   }
   if ( mShowFeatureActions )
   {
-    layerActions.append( QgsMapLayerActionRegistry::instance()->mapLayerActions( layer, QgsMapLayerAction::Layer ) );
+    layerActions.append( QgsGui::mapLayerActionRegistry()->mapLayerActions( layer, QgsMapLayerAction::Layer ) );
     if ( layerActions.count() > nCustomActions )
     {
       separators.append( layerActions[nCustomActions] );
@@ -245,7 +244,7 @@ void QgsIdentifyMenu::addVectorLayer( QgsVectorLayer *layer, const QList<QgsMapT
   }
   if ( mShowFeatureActions )
   {
-    layerActions << QgsMapLayerActionRegistry::instance()->mapLayerActions( layer, targets );
+    layerActions << QgsGui::mapLayerActionRegistry()->mapLayerActions( layer, targets );
 
     if ( layerActions.count() > nCustomActions )
     {

src/gui/qgsidentifymenu.h

@@ -30,7 +30,7 @@ class CustomActionRegistry : public QgsMapLayerActionRegistry
     Q_OBJECT
 
   public:
-    explicit CustomActionRegistry( QObject *parent );
+    CustomActionRegistry();
     // remove all actions
     void clear() { mMapLayerActionList.clear(); }
 };