Added wxSHOW_EFFECT_NONE.

Calling Show/HideWithEffect() with this effect is the same as calling just the normal Show/Hide().

This is convenient as it allows to use the same API, whether with effects or without them.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@62267 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

interface/wx/window.h

@@ -12,6 +12,13 @@
 */
 enum wxShowEffect
 {
+    /**
+        No effect, equivalent to normal wxWindow::Show() or Hide() call.
+
+        @since 2.9.1
+     */
+    wxSHOW_EFFECT_NONE,
+
     /// Roll window to the left
     wxSHOW_EFFECT_ROLL_TO_LEFT,