From 2bec2e38b6ca44c0be44eaaae7742aa8b298718b Mon Sep 17 00:00:00 2001
From: HomeWorld <homeworld@gmail.com>
Date: Sat, 11 Dec 2010 04:05:19 +0200
Subject: [PATCH] Made Display class 100% flicker free on wxMSW.

---
 gui/display.py | 40 +++++++++++++++++++++++++++++++++++++++-
 1 file changed, 39 insertions(+), 1 deletion(-)

diff --git a/gui/display.py b/gui/display.py
index c9865289e..71a367d9e 100644
--- a/gui/display.py
+++ b/gui/display.py
@@ -36,6 +36,9 @@ class Display(wx.ListCtrl):
         self.Bind(wx.EVT_LIST_COL_END_DRAG, self.resizeChecker)
         self.Bind(wx.EVT_LIST_COL_BEGIN_DRAG, self.resizeSkip)
 
+        if "wxMSW" in wx.PlatformInfo:
+            self.Bind(wx.EVT_ERASE_BACKGROUND, self.OnEraseBk)
+
         self.mainFrame = gui.mainFrame.MainFrame.getInstance()
 
         i = 0
@@ -68,6 +71,42 @@ class Display(wx.ListCtrl):
 
         self.imageListBase = self.imageList.ImageCount
 
+
+    def OnEraseBk(self,event):
+        if self.GetItemCount() >0:
+            width, height = self.GetClientSize()
+            dc = event.GetDC()
+
+            dc.DestroyClippingRegion()
+            dc.SetClippingRegion(0, 0, width, height)
+            x,y,w,h = dc.GetClippingBox()
+
+            topItem = self.GetTopItem()
+            bottomItem = topItem + self.GetCountPerPage()
+
+            if bottomItem >= self.GetItemCount():
+               bottomItem = self.GetItemCount() - 1
+
+            topRect = self.GetItemRect(topItem, wx.LIST_RECT_LABEL)
+            bottomRect = self.GetItemRect(bottomItem, wx.LIST_RECT_BOUNDS)
+
+
+            items_rect = wx.Rect(topRect.left, 0, bottomRect.right - topRect.left, bottomRect.bottom )
+
+            updateRegion = wx.Region(x,y,w,h)
+            updateRegion.SubtractRect(items_rect)
+
+            dc.DestroyClippingRegion()
+            dc.SetClippingRegionAsRegion(updateRegion)
+
+            dc.SetBackground(wx.Brush(self.GetBackgroundColour(), wx.SOLID))
+            dc.Clear()
+
+            dc.DestroyClippingRegion()
+
+        else:
+            event.Skip()
+
     def addColumn(self, i, col):
         self.activeColumns.append(col)
         info = wx.ListItem()
@@ -170,7 +209,6 @@ class Display(wx.ListCtrl):
 
                 self.SetItemData(item, id)
 
-
 #        self.Freeze()
         if 'wxMSW' in wx.PlatformInfo:
             for i,col in enumerate(self.activeColumns):