From 63916e4494c0f0d382f9ed3337d1fcec900028d1 Mon Sep 17 00:00:00 2001
From: Vadim Zeitlin <vadim@wxwidgets.org>
Date: Fri, 14 Apr 2006 17:16:45 +0000
Subject: [PATCH] don't show vertical scrollbar if we don't need it

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@38718 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
---
 src/generic/vscroll.cpp | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/src/generic/vscroll.cpp b/src/generic/vscroll.cpp
index 083e26c801..3fc8a940d5 100644
--- a/src/generic/vscroll.cpp
+++ b/src/generic/vscroll.cpp
@@ -171,6 +171,25 @@ void wxVScrolledWindow::UpdateScrollbar()
         h += OnGetLineHeight(line);
     }
 
+    // if we still have remaining space below, maybe we can fit everything?
+    if ( h < hWindow )
+    {
+        wxCoord hAll = h;
+        for ( size_t lineFirst = m_lineFirst; lineFirst > 0; lineFirst-- )
+        {
+            hAll += OnGetLineHeight(m_lineFirst - 1);
+            if ( hAll > hWindow )
+                break;
+        }
+
+        if ( hAll < hWindow )
+        {
+            // we don't need scrollbar at all
+            m_lineFirst = 0;
+            SetScrollbar(wxVERTICAL, 0, 0, 0);
+        }
+    }
+
     m_nVisible = line - m_lineFirst;
 
     int pageSize = m_nVisible;
-- 
2.45.2