[PATCH 04/22] Prevent flickering when redrawing the TUI python window

[Hannes Domani]

tui_win_info::refresh_window first redraws the background window, then
tui_wrefresh draws the python text on top of it, which flickers.

By using wnoutrefresh for the background window, the actual drawing on
the screen is only done once, without flickering.
---
 gdb/python/py-tui.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/gdb/python/py-tui.c b/gdb/python/py-tui.c
index 39753aed468..02dcd6949df 100644
--- a/gdb/python/py-tui.c
+++ b/gdb/python/py-tui.c
@@ -91,12 +91,14 @@ class tui_py_window : public tui_win_info
 
   void refresh_window () override
   {
-    tui_win_info::refresh_window ();
     if (m_inner_window != nullptr)
       {
+	wnoutrefresh (handle.get ());
 	touchwin (m_inner_window.get ());
 	tui_wrefresh (m_inner_window.get ());
       }
+    else
+      tui_win_info::refresh_window ();
   }
 
   void click (int mouse_x, int mouse_y, int mouse_button) override;
-- 
2.30.1