[api] Add a public method to clear the rubber band for the

QgsMapToolExtent

Otherwise plugins have no way to remove this from the canvas

python/gui/auto_generated/qgsmaptoolextent.sip.in

@@ -57,6 +57,13 @@ If the aspect ratio isn't fixed, the width and height will be set to zero.
     QgsRectangle extent() const;
 %Docstring
 Returns the current extent drawn onto the canvas.
+%End
+
+    void clearRubberBand();
+%Docstring
+Removes the tool's rubber band from the canvas.
+
+.. versionadded:: 3.20
 %End
 
   signals:

src/gui/qgsmaptoolextent.cpp

@@ -34,8 +34,7 @@ void QgsMapToolExtent::activate()
 
 void QgsMapToolExtent::deactivate()
 {
-  mRubberBand->reset( QgsWkbTypes::PolygonGeometry );
+  clearRubberBand();
-
   QgsMapTool::deactivate();
 }
 
@@ -95,6 +94,11 @@ QgsRectangle QgsMapToolExtent::extent() const
   }
 }
 
+void QgsMapToolExtent::clearRubberBand()
+{
+  mRubberBand->reset( QgsWkbTypes::PolygonGeometry );
+}
+
 void QgsMapToolExtent::calculateEndPoint( QgsPointXY &point )
 {
   if ( mRatio.width() > 0 && mRatio.height() > 0 )
@@ -112,8 +116,6 @@ void QgsMapToolExtent::drawExtent()
   if ( qgsDoubleNear( mStartPoint.x(), mEndPoint.x() ) && qgsDoubleNear( mStartPoint.y(), mEndPoint.y() ) )
     return;
 
-  mRubberBand->reset( QgsWkbTypes::PolygonGeometry );
-
   QgsRectangle rect( mStartPoint, mEndPoint );
 
   mRubberBand->reset( QgsWkbTypes::PolygonGeometry );

src/gui/qgsmaptoolextent.h

@@ -64,6 +64,13 @@ class GUI_EXPORT QgsMapToolExtent : public QgsMapTool
      */
     QgsRectangle extent() const;
 
+    /**
+     * Removes the tool's rubber band from the canvas.
+     *
+     * \since QGIS 3.20
+     */
+    void clearRubberBand();
+
   signals:
 
     //! signal emitted on extent change