Move tracing action creation to qgis app

python/gui/qgsmapcanvastracer.sip

@@ -2,6 +2,7 @@
  * Extension of QgsTracer that provides extra functionality:
  *  - automatic updates of own configuration based on canvas settings
  *  - reporting of issues to the user via message bar
+ *  - determines whether tracing is currently enabled by the user
  *
  * A simple registry of tracer instances associated to map canvas instances
  * is kept for convenience. (Map tools do not need to create their local
@@ -21,8 +22,12 @@ class QgsMapCanvasTracer : QgsTracer
     explicit QgsMapCanvasTracer( QgsMapCanvas* canvas, QgsMessageBar* messageBar = 0 );
     ~QgsMapCanvasTracer();
 
-    //! Access to action that user may use to toggle tracing on/off
-    QAction* actionEnableTracing();
+    //! Access to action that user may use to toggle tracing on/off. May be null if no action was associated
+    QAction* actionEnableTracing() const;
+
+    //! Assign "enable tracing" checkable action to the tracer.
+    //! The action is used to determine whether tracing is currently enabled by the user
+    void setActionEnableTracing( QAction* action );
 
     //! Retrieve instance of this class associated with given canvas (if any).
     //! The class keeps a simple registry of tracers associated with map canvas

src/app/qgisapp.cpp

@@ -1981,10 +1981,10 @@ void QgisApp::createToolBars()
   mDigitizeToolBar->insertWidget( mActionMoveFeature, tbAddCircularString );
 
   // Cad toolbar
-  mAdvancedDigitizeToolBar->insertAction( mActionUndo, mAdvancedDigitizingDockWidget->enableAction() );
+  mAdvancedDigitizeToolBar->insertAction( mActionEnableTracing, mAdvancedDigitizingDockWidget->enableAction() );
 
   mTracer = new QgsMapCanvasTracer( mMapCanvas, messageBar() );
-  mAdvancedDigitizeToolBar->insertAction( mActionUndo, mTracer->actionEnableTracing() );
+  mTracer->setActionEnableTracing( mActionEnableTracing );
 }
 
 void QgisApp::createStatusBar()
@@ -9739,7 +9739,7 @@ void QgisApp::activateDeactivateLayerRelatedActions( QgsMapLayer* layer )
     mActionMergeFeatures->setEnabled( false );
     mActionMergeFeatureAttributes->setEnabled( false );
     mActionRotatePointSymbols->setEnabled( false );
-    mTracer->actionEnableTracing()->setEnabled( false );
+    mActionEnableTracing->setEnabled( false );
 
     mActionPinLabels->setEnabled( false );
     mActionShowHideLabels->setEnabled( false );
@@ -9860,7 +9860,7 @@ void QgisApp::activateDeactivateLayerRelatedActions( QgsMapLayer* layer )
       mActionRotateFeature->setEnabled( isEditable && canChangeGeometry );
       mActionNodeTool->setEnabled( isEditable && canChangeGeometry );
 
-      mTracer->actionEnableTracing()->setEnabled( isEditable && canAddFeatures &&
+      mActionEnableTracing->setEnabled( isEditable && canAddFeatures &&
           ( vlayer->geometryType() == QGis::Line || vlayer->geometryType() == QGis::Polygon ) );
 
       if ( vlayer->geometryType() == QGis::Point )

src/gui/qgsmapcanvastracer.cpp

@@ -17,6 +17,7 @@ QgsMapCanvasTracer::QgsMapCanvasTracer( QgsMapCanvas* canvas, QgsMessageBar* mes
     : mCanvas( canvas )
     , mMessageBar( messageBar )
     , mLastMessage( nullptr )
+    , mActionEnableTracing( nullptr )
 {
   sTracers.insert( canvas, this );
 
@@ -27,10 +28,6 @@ QgsMapCanvasTracer::QgsMapCanvasTracer( QgsMapCanvas* canvas, QgsMessageBar* mes
   connect( canvas, SIGNAL( currentLayerChanged( QgsMapLayer* ) ), this, SLOT( onCurrentLayerChanged() ) );
   connect( canvas->snappingUtils(), SIGNAL( configChanged() ), this, SLOT( invalidateGraph() ) );
 
-  mActionEnableTracing = new QAction( QIcon( QgsApplication::getThemeIcon( "/mActionTracing.png" ) ), tr( "Enable Tracing" ), this );
-  mActionEnableTracing->setShortcut( Qt::Key_T );
-  mActionEnableTracing->setCheckable( true );
-
   // arbitrarily chosen limit that should allow for fairly fast initialization
   // of the underlying graph structure
   setMaxFeatureCount( QSettings().value( "/qgis/digitizing/tracing_max_feature_count", 10000 ).toInt() );

src/gui/qgsmapcanvastracer.h

@@ -12,6 +12,7 @@ class QgsMessageBarItem;
  * Extension of QgsTracer that provides extra functionality:
  *  - automatic updates of own configuration based on canvas settings
  *  - reporting of issues to the user via message bar
+ *  - determines whether tracing is currently enabled by the user
  *
  * A simple registry of tracer instances associated to map canvas instances
  * is kept for convenience. (Map tools do not need to create their local
@@ -29,8 +30,12 @@ class GUI_EXPORT QgsMapCanvasTracer : public QgsTracer
     explicit QgsMapCanvasTracer( QgsMapCanvas* canvas, QgsMessageBar* messageBar = 0 );
     ~QgsMapCanvasTracer();
 
-    //! Access to action that user may use to toggle tracing on/off
-    QAction* actionEnableTracing() { return mActionEnableTracing; }
+    //! Access to action that user may use to toggle tracing on/off. May be null if no action was associated
+    QAction* actionEnableTracing() const { return mActionEnableTracing; }
+
+    //! Assign "enable tracing" checkable action to the tracer.
+    //! The action is used to determine whether tracing is currently enabled by the user
+    void setActionEnableTracing( QAction* action ) { mActionEnableTracing = action; }
 
     //! Retrieve instance of this class associated with given canvas (if any).
     //! The class keeps a simple registry of tracers associated with map canvas

src/gui/qgsmaptoolcapture.cpp

@@ -139,7 +139,7 @@ void QgsMapToolCapture::currentLayerChanged( QgsMapLayer *layer )
 bool QgsMapToolCapture::tracingEnabled()
 {
   QgsMapCanvasTracer* tracer = QgsMapCanvasTracer::tracerForCanvas( mCanvas );
-  return tracer && tracer->actionEnableTracing()->isChecked();
+  return tracer && tracer->actionEnableTracing() && tracer->actionEnableTracing()->isChecked();
 }
 
 

src/ui/qgisapp.ui

@@ -381,6 +381,7 @@
    <attribute name="toolBarBreak">
     <bool>false</bool>
    </attribute>
+   <addaction name="mActionEnableTracing"/>
    <addaction name="mActionUndo"/>
    <addaction name="mActionRedo"/>
    <addaction name="mActionRotateFeature"/>
@@ -2398,6 +2399,21 @@ Acts on currently active editable layer</string>
     <string>Report an issue</string>
    </property>
   </action>
+  <action name="mActionEnableTracing">
+   <property name="checkable">
+    <bool>true</bool>
+   </property>
+   <property name="icon">
+    <iconset resource="../../images/images.qrc">
+     <normaloff>:/images/themes/default/mActionTracing.png</normaloff>:/images/themes/default/mActionTracing.png</iconset>
+   </property>
+   <property name="text">
+    <string>Enable Tracing</string>
+   </property>
+   <property name="shortcut">
+    <string>T</string>
+   </property>
+  </action>
  </widget>
  <resources>
   <include location="../../images/images.qrc"/>