[NUI] If the view had focus when it was unparented, the focus is cleared. (#4654)

When the view is unparented, the focus is not cleared.
So, when app re-add the view and SetCurrentFocusView, app do not receiving the FocusGained event.

diff --git a/src/Tizen.NUI/src/public/BaseComponents/ViewInternal.cs b/src/Tizen.NUI/src/public/BaseComponents/ViewInternal.cs
index 8135c96..9180064 100755 (executable)
--- a/src/Tizen.NUI/src/public/BaseComponents/ViewInternal.cs
+++ b/src/Tizen.NUI/src/public/BaseComponents/ViewInternal.cs
@@ -1035,6 +1035,11 @@ namespace Tizen.NUI.BaseComponents
 
         internal void RemoveChild(View child)
         {
+            // If the view had focus, it clears focus.
+            if (child == FocusManager.Instance.GetCurrentFocusView())
+            {
+                FocusManager.Instance.ClearFocus();
+            }
             // Do actual child removal
             Interop.Actor.Remove(SwigCPtr, View.getCPtr(child));
             if (NDalicPINVOKE.SWIGPendingException.Pending)

diff --git a/src/Tizen.NUI/src/public/Common/Layer.cs b/src/Tizen.NUI/src/public/Common/Layer.cs
index e1d00a7..cc9629c 100755 (executable)
--- a/src/Tizen.NUI/src/public/Common/Layer.cs
+++ b/src/Tizen.NUI/src/public/Common/Layer.cs
@@ -334,6 +334,12 @@ namespace Tizen.NUI
                 Tizen.Log.Error("NUI", "You have deleted a view that is not a child of this layer.");
                 return;
             }
+            // If the view had focus, it clears focus.
+            if (child == FocusManager.Instance.GetCurrentFocusView())
+            {
+                FocusManager.Instance.ClearFocus();
+            }
+
             Interop.Actor.Remove(SwigCPtr, View.getCPtr(child));
             if (NDalicPINVOKE.SWIGPendingException.Pending)
                 throw NDalicPINVOKE.SWIGPendingException.Retrieve();