From 4b1da1ce9ad003c3623f9ad643642c6955517edb Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Axel=20D=C3=B6rfler?= <axeld@pinc-software.de>
Date: Tue, 4 Apr 2006 10:26:19 +0000
Subject: [PATCH] DrawSlider() now locks the looper - this should fix bug #396.

git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@17002 a95241bf-73f2-0310-859d-f6bbb57e9c96
---
 src/kits/interface/Slider.cpp | 28 +++++++++++++++-------------
 1 file changed, 15 insertions(+), 13 deletions(-)

diff --git a/src/kits/interface/Slider.cpp b/src/kits/interface/Slider.cpp
index 7d9724752d..ca08c96470 100644
--- a/src/kits/interface/Slider.cpp
+++ b/src/kits/interface/Slider.cpp
@@ -716,24 +716,26 @@ BSlider::Draw(BRect updateRect)
 void
 BSlider::DrawSlider()
 {
+	if (LockLooper()) {
 #if USE_OFF_SCREEN_VIEW
-	if (!fOffScreenBits)
-		return;
-	if (fOffScreenBits->Lock()) {
+		if (!fOffScreenBits)
+			return;
+		if (fOffScreenBits->Lock()) {
 #endif
-		DrawBar();
-		DrawHashMarks();
-		DrawThumb();
-		DrawFocusMark();
-		DrawText();
+			DrawBar();
+			DrawHashMarks();
+			DrawThumb();
+			DrawFocusMark();
+			DrawText();
 
 #if USE_OFF_SCREEN_VIEW
-		fOffScreenView->Sync();
-		fOffScreenBits->Unlock();
-
-		DrawBitmap(fOffScreenBits, B_ORIGIN);
+			fOffScreenView->Sync();
+			fOffScreenBits->Unlock();
+	
+			DrawBitmap(fOffScreenBits, B_ORIGIN);
+		}
+#endif
 	}
-#endif
 }