1 files changed, 13 insertions, 4 deletions
diff --git a/macosx/tkMacOSXEvent.c b/macosx/tkMacOSXEvent.c
index 843ef8c..d866b02 100644
--- a/macosx/tkMacOSXEvent.c
+++ b/macosx/tkMacOSXEvent.c
@@ -137,13 +137,22 @@ MODULE_SCOPE void
 TkMacOSXFlushWindows(void)
 {
     NSArray *macWindows = [NSApp orderedWindows];
+
     if ([macWindows count] > 0) {
 	while (Tcl_DoOneEvent(TCL_IDLE_EVENTS)){}
     }
-    for (NSWindow *w in macWindows) {
-    	if (TkMacOSXGetXWindow(w)) {
-    	    [w displayIfNeeded];
-    	}
+    if ([NSApp isDrawing]) {
+	for (NSWindow *w in macWindows) {
+	    if (TkMacOSXGetXWindow(w)) {
+		[w setViewsNeedDisplay:YES];
+	    }
+	}
+    } else {
+	for (NSWindow *w in macWindows) {
+	    if (TkMacOSXGetXWindow(w)) {
+		[w display];
+	    }
+	}
     }
 }