Update header/footer in response to HeaderElement/FooterElement notifications

This approach allows to register only one handler per header/footer,
covers both Header/Footer and HeaderTemplate/FooterTemplate cases,
while handlers are called when elements are ready, so there's no
need for an awkward call to Device.StartTimer().

Change-Id: I16c2943e20d93efeab409e8999ce7e72105aa79a
Signed-off-by: Pawel Andruszkiewicz <p.andruszkie@samsung.com>

1 files changed, 4 insertions, 40 deletions

diff --git a/Xamarin.Forms.Platform.Tizen/Renderers/ListViewRenderer.cs b/Xamarin.Forms.Platform.Tizen/Renderers/ListViewRenderer.cs
index d2b325af..fff21794 100644
--- a/Xamarin.Forms.Platform.Tizen/Renderers/ListViewRenderer.cs
+++ b/Xamarin.Forms.Platform.Tizen/Renderers/ListViewRenderer.cs
@@ -59,12 +59,10 @@ namespace Xamarin.Forms.Platform.Tizen
 			RegisterPropertyHandler(ListView.IsGroupingEnabledProperty, UpdateIsGroupingEnabled);
 			RegisterPropertyHandler(ListView.HasUnevenRowsProperty, UpdateHasUnevenRows);
 			RegisterPropertyHandler(ListView.RowHeightProperty, UpdateRowHeight);
-			RegisterPropertyHandler(ListView.HeaderProperty, UpdateHeader);
 			RegisterPropertyHandler(ListView.SelectedItemProperty, UpdateSelectedItem);
-			RegisterPropertyHandler(ListView.FooterProperty, UpdateFooter);
 			RegisterPropertyHandler(ListView.ItemsSourceProperty, UpdateSource);
-			RegisterPropertyHandler(ListView.FooterTemplateProperty, UpdateFooter);
-			RegisterPropertyHandler(ListView.HeaderTemplateProperty, UpdateHeader);
+			RegisterPropertyHandler("HeaderElement", UpdateHeader);
+			RegisterPropertyHandler("FooterElement", UpdateFooter);
 		}
 
 		/// <summary>
@@ -327,24 +325,7 @@ namespace Xamarin.Forms.Platform.Tizen
 		/// </summary>
 		void UpdateHeader()
 		{
-			if (Element.Header == null)
-			{
-				Control.SetHeader(null);
-				return;
-			}
-
-			if (((IListViewController)Element).HeaderElement == null)
-			{
-				Device.StartTimer(new TimeSpan(0), () =>
-				{
-					Control.SetHeader(((IListViewController)Element).HeaderElement as VisualElement);
-					return false;
-				});
-			}
-			else
-			{
-				Control.SetHeader(((IListViewController)Element).HeaderElement as VisualElement);
-			}
+			Control.SetHeader(((IListViewController)Element).HeaderElement as VisualElement);
 		}
 
 		/// <summary>
@@ -352,24 +333,7 @@ namespace Xamarin.Forms.Platform.Tizen
 		/// </summary>
 		void UpdateFooter()
 		{
-			if (Element.Footer == null)
-			{
-				Control.SetFooter(null);
-				return;
-			}
-
-			if (((IListViewController)Element).FooterElement == null)
-			{
-				Device.StartTimer(new TimeSpan(0), () =>
-				{
-					Control.SetFooter(((IListViewController)Element).FooterElement as VisualElement);
-					return false;
-				});
-			}
-			else
-			{
-				Control.SetFooter(((IListViewController)Element).FooterElement as VisualElement);
-			}
+			Control.SetFooter(((IListViewController)Element).FooterElement as VisualElement);
 		}
 
 		/// <summary>