Add more new Python code snippets

docs/sphinx/rest_substitutions/snippets/python/converted/wx.ComboCtrl.SetMainControl.1.py

@@ -0,0 +1,17 @@
+
+    # Create the combo control using its default ctor.
+    combo = wx.ComboCtrl()
+
+    # Create the custom main control using its default ctor too.
+    someMainWindow = SomeWindow()
+
+    # Set the custom main control before creating the combo.
+    combo.SetMainControl(someMainWindow)
+
+    # And only create it now: wx.TextCtrl won't be unnecessarily
+    # created because the combo already has a main window.
+    combo.Create(panel, wx.ID_ANY, wx.EmptyString)
+
+    # Finally create the main window itself, now that its parent was
+    # created.
+    someMainWindow.Create(combo, ...)

docs/sphinx/rest_substitutions/snippets/python/converted/wx.ListCtrl.1.py

@@ -0,0 +1,12 @@
+
+    listctrl = wx.ListCtrl(...)
+    for i in range(3):
+        listctrl.InsertColumn(i, wx.String.Format("Column %d", i))
+
+    order = [ 2, 0, 1]
+    listctrl.SetColumnsOrder(order)
+
+    # Now listctrl.GetColumnsOrder() will return order and
+    # listctrl.GetColumnIndexFromOrder(n) will return order[n] and
+    # listctrl.GetColumnOrder() will return 1, 2 and 0 for the column 0, 1 and 2
+    # respectively.

docs/sphinx/rest_substitutions/snippets/python/converted/wx.ListCtrl.GetUpdatedAscendingSortIndicator.1.py

@@ -0,0 +1,9 @@
+
+    def OnColClick(self, event):
+        col = event.GetColumn()
+        if col == -1:
+            return # clicked outside any column.
+
+        ascending = self.GetUpdatedAscendingSortIndicator(col)
+        self.SortItems(self.MyCompareFunction, ascending)
+        self.ShowSortIndicator(col, ascending)

docs/sphinx/rest_substitutions/snippets/python/converted/wx.Sizer.SetSizeHints.1.py

@@ -0,0 +1,12 @@
+
+        # In a frame's __init__
+        ...
+        panel = wx.Panel(self)
+        sizer = wx.BoxSizer(wx.VERTICAL)
+        sizer.Add(...)
+        sizer.Add(...)
+        panel.SetSizer(sizer)
+
+        # Use the panel sizer to set the initial and minimal size of the
+        # frame to fit its contents.
+        sizer.SetSizeHints(self)

docs/sphinx/rest_substitutions/snippets/python/converted/wx.html2.WebView.IsBackendAvailable.1.py

@@ -0,0 +1,3 @@
+
+    if wx.html2.WebView.IsBackendAvailable(wx.html2.WebViewBackendEdge):
+        # Do whatever you need to do when the Edge backend is available

docs/sphinx/rest_substitutions/snippets/python/converted/wx.xrc.XmlResource.LoadDocument.1.py

@@ -0,0 +1,12 @@
+
+    xrc_data = ... # Retrieve it from wherever.
+    xmlDoc = wx.xml.XmlDocument(io.BytesIO(xrc_data))
+    if not xmlDoc.IsOk():
+        ... handle invalid XML here ...
+        return
+
+    if not wx.XmlResource.Get().LoadDocument(xmlDoc):
+        ... handle invalid XRC here ...
+        return
+
+    ... use the just loaded XRC as usual ...