wxGUI: BaseToolbar.OnTool needs to be explicitly defined (OSGeo#2632)

Fixes OSGeo#2626

gui/wxpython/gui_core/toolbars.py

@@ -87,7 +87,12 @@
 
 
 class ToolbarController:
-    """Controller specialized for wx.ToolBar subclass."""
+    """Controller specialized for wx.ToolBar subclass.
+
+    Toolbar subclasses must delegate methods to controller.
+    Methods inherited from toolbar class must be delegated explicitly
+    and other methods can be delegated by @c __getattr__.
+    """
 
     def __init__(self, classObject, widget, parent, toolSwitcher):
         """
@@ -372,6 +377,10 @@ def CreateTool(self, *args, **kwargs):
         """@copydoc ToolbarController::CreateTool()"""
         self.controller.CreateTool(*args, **kwargs)
 
+    def OnTool(self, event):
+        """@copydoc ToolbarController::OnTool()"""
+        self.controller.OnTool(event)
+
     def __getattr__(self, name):
         return getattr(self.controller, name)
 
@@ -416,6 +425,10 @@ def CreateTool(self, *args, **kwargs):
         """@copydoc ToolbarController::CreateTool()"""
         self.controller.CreateTool(*args, **kwargs)
 
+    def OnTool(self, event):
+        """@copydoc ToolbarController::OnTool()"""
+        self.controller.OnTool(event)
+
     def __getattr__(self, name):
         return getattr(self.controller, name)