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[graphlib.git] / DrawingWindow.h

diff --git a/DrawingWindow.h b/DrawingWindow.h
index 9ddd4b7..c6aaa0d 100644 (file)
--- a/DrawingWindow.h
+++ b/DrawingWindow.h
@@ -36,6 +36,8 @@ public:
     void drawLine(int x1, int y1, int x2, int y2);
     void drawRect(int x1, int y1, int x2, int y2);
 
+    bool sync(unsigned long time = ULONG_MAX);
+
     void sleep(unsigned long secs);
     void msleep(unsigned long msecs);
     void usleep(unsigned long usecs);