Only issue non-threaded renderer warning once

Change-Id: Id278fa28080d829763c907423089897728b01baa
Reviewed-by: Samuel Rødal <samuel.rodal@nokia.com>

1 files changed, 7 insertions, 3 deletions

diff --git a/src/declarative/items/qquickcanvas.cpp b/src/declarative/items/qquickcanvas.cpp
index 163dc8838c..86d44db4c9 100644
--- a/src/declarative/items/qquickcanvas.cpp
+++ b/src/declarative/items/qquickcanvas.cpp
@@ -132,9 +132,13 @@ public:
         : updatePending(false)
         , animationRunning(false)
     {
-        qWarning("QQuickCanvas: using non-threaded render loop. Be very sure to not access scene graph "
-                 "objects outside the QQuickItem::updatePaintNode() call. Failing to do so will cause "
-                 "your code to crash on other platforms!");
+        static bool warningMessage = false;
+        if (!warningMessage) {
+            warningMessage = true;
+            qWarning("QQuickCanvas: using non-threaded render loop. Be very sure to not access scene "
+                     "graph objects outside the QQuickItem::updatePaintNode() call. Failing to do so "
+                     "will cause your code to crash on other platforms!");
+        }
     }
 
     virtual void paint() {