From f03c22f9b36d333f90157c7c8beada4593084db2 Mon Sep 17 00:00:00 2001
From: Vadim Zeitlin <vadim@wxwidgets.org>
Date: Mon, 14 Dec 2009 19:17:12 +0000
Subject: [PATCH] Avoid painting generic wxDataViewCtrl if it has no columns.

The code in wxDataViewMainWindow::OnPaint() relied on having at least the
first column and didn't work for a completely empty control. Just don't paint
it at all in this case as it's unnecessary anyhow.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@62886 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
---
 src/generic/datavgen.cpp | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/src/generic/datavgen.cpp b/src/generic/datavgen.cpp
index 5c39027e6b..a13797b3f6 100644
--- a/src/generic/datavgen.cpp
+++ b/src/generic/datavgen.cpp
@@ -1565,6 +1565,13 @@ void wxDataViewMainWindow::OnPaint( wxPaintEvent &WXUNUSED(event) )
 
     // compute which columns needs to be redrawn
     unsigned int cols = GetOwner()->GetColumnCount();
+    if ( !cols )
+    {
+        // we assume that we have at least one column below and painting an
+        // empty control is unnecessary anyhow
+        return;
+    }
+
     unsigned int col_start = 0;
     unsigned int x_start;
     for (x_start = 0; col_start < cols; col_start++)
-- 
2.47.2