wxGUI/pydit: fix showing recent files submenu (OSGeo#6683)

Author: tmszi

gui/wxpython/gui_core/pyedit.py

@@ -284,6 +284,7 @@ def __init__(self, panel, guiparent, giface):
         self.tempfile = None  # bool, make them strings for better code
         self.overwrite = False
         self.parameters = None
+        self.recent_files = None
 
     def _openFile(self, file_path):
         """Try open file and read content
@@ -795,9 +796,15 @@ def _layout(self):
 
         self.Layout()
 
-    def SetUpPage(self, *args, **kwargs):
-        MainPageBase.SetUpPage(self, *args, **kwargs)
-        self.controller.SetRecentFilesMenu(self.GetMenu()[0])
+    def OnDockUndock(self, event=None):
+        MainPageBase.OnDockUndock(self, event)
+        if not MainPageBase.IsDocked(self):
+            if self.controller.recent_files is None:
+                menuBar = self.GetMenu()[0]
+                # Init recent files submenu
+                self.controller.SetRecentFilesMenu(
+                    menu=menuBar.GetMenus()[0][0],  # Parent File menu
+                )
 
     # TODO: it would be nice if we can pass the controller to the menu
     # might not be possible on the side of menu
@@ -886,6 +893,10 @@ def __init__(
             model=MenuTreeModelBuilder(filename).GetModel(separators=True),
             class_handler=self.panel,
         )
+        # Init recent files submenu
+        self.panel.controller.SetRecentFilesMenu(
+            menu=self.menubar.GetMenus()[0][0],  # Parent File menu
+        )
         self.SetMenuBar(self.menubar)
 
         sizer = wx.BoxSizer(wx.VERTICAL)