Add method to retrieve QgsVertexMarker center point in map coordinates

python/gui/auto_generated/qgsvertexmarker.sip.in

@@ -46,6 +46,20 @@ A class for marking vertices of features using e.g. circles or 'x'.
     QgsVertexMarker( QgsMapCanvas *mapCanvas /TransferThis/ );
 
     void setCenter( const QgsPointXY &point );
+%Docstring
+Sets the center ``point`` of the marker, in map coordinates.
+
+.. seealso:: :py:func:`center`
+%End
+
+    QgsPointXY center() const;
+%Docstring
+Returns the center point of the marker, in map coordinates.
+
+.. seealso:: :py:func:`setCenter`
+
+.. versionadded:: 3.18
+%End
 
     void setIconType( int iconType );
 

src/gui/qgsvertexmarker.h

@@ -61,8 +61,21 @@ class GUI_EXPORT QgsVertexMarker : public QgsMapCanvasItem
 
     QgsVertexMarker( QgsMapCanvas *mapCanvas SIP_TRANSFERTHIS );
 
+    /**
+     * Sets the center \a point of the marker, in map coordinates.
+     *
+     * \see center()
+     */
     void setCenter( const QgsPointXY &point );
 
+    /**
+     * Returns the center point of the marker, in map coordinates.
+     *
+     * \see setCenter()
+     * \since QGIS 3.18
+     */
+    QgsPointXY center() const { return mCenter; }
+
     void setIconType( int iconType );
 
     void setIconSize( int iconSize );