[NUI] Support RequestLayout() while main loop is in idle state

Previously, RequestLayout() was not supported if it was called while
main loop was in idle state.

Now, RequestLayout() calls Awake() to awake main loop again and Layout
can be re-calculated correctly.

diff --git a/src/Tizen.NUI/src/public/Layouting/LayoutItem.cs b/src/Tizen.NUI/src/public/Layouting/LayoutItem.cs
index 3b074c5..6efc654 100755 (executable)
--- a/src/Tizen.NUI/src/public/Layouting/LayoutItem.cs
+++ b/src/Tizen.NUI/src/public/Layouting/LayoutItem.cs
@@ -348,7 +348,15 @@ namespace Tizen.NUI
         public void RequestLayout()
         {
             flags = flags | LayoutFlags.ForceLayout;
-            if (parent != null)
+            if (parent == null)
+            {
+                // If RequestLayout() is called while main loop is in idle state,
+                // then Awake() is required to awake main loop again and
+                // Layout can be re-calculated correctly.
+                // For performance, Awake() is called only by the root layout.
+                ProcessorController.Instance.Awake();
+            }
+            else
             {
                 LayoutGroup layoutGroup = parent as LayoutGroup;
                 if (layoutGroup != null && !layoutGroup.LayoutRequested)