From: Vadim Zeitlin <vadim@wxwidgets.org>
Date: Fri, 21 May 2010 13:17:30 +0000 (+0000)
Subject: Erase the column label background in wxGrid to avoid display artefacts.
X-Git-Url: https://git.saurik.com/wxWidgets.git/commitdiff_plain/b5e97a17b1afb7cea4c03def51e830b5cd6d92d6

Erase the column label background in wxGrid to avoid display artefacts.

Apparently the column label text is not always drawn correctly when double
buffering is used, so erase the background completely before drawing the text.

Unfortunately this might result in flicker but presumably correct display is
more important.

Closes #12055.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@64375 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
---

diff --git a/src/generic/grid.cpp b/src/generic/grid.cpp
index d0675c4d8a..7ca5c3cdd9 100644
--- a/src/generic/grid.cpp
+++ b/src/generic/grid.cpp
@@ -5572,6 +5572,11 @@ void wxGrid::DrawColLabel(wxDC& dc, int col)
     }
     else
     {
+        // It is reported that we need to erase the background to avoid display
+        // artefacts, see #12055.
+        wxDCBrushChanger setBrush(dc, m_colWindow->GetBackgroundColour());
+        dc.DrawRectangle(rect);
+
         rend.DrawBorder(*this, dc, rect);
     }