added case in GTK listviewrendered for change of SelectedItem property (#4757)

diff --git a/Xamarin.Forms.Controls.Issues/Xamarin.Forms.Controls.Issues.Shared/Issue4748.cs b/Xamarin.Forms.Controls.Issues/Xamarin.Forms.Controls.Issues.Shared/Issue4748.cs
new file mode 100644 (file)
index 0000000..7110cdc
--- /dev/null
+++ b/Xamarin.Forms.Controls.Issues/Xamarin.Forms.Controls.Issues.Shared/Issue4748.cs
@@ -0,0 +1,39 @@
+using System.Collections.Generic;
+using Xamarin.Forms.CustomAttributes;
+using Xamarin.Forms.Internals;
+
+namespace Xamarin.Forms.Controls.Issues
+{
+       [Preserve(AllMembers = true)]
+       [Issue(IssueTracker.Github, 4748, "Setting SelectedItem property of GTK ListView does not reflected in UI", PlatformAffected.Default)]
+       public class Issue4748 : TestContentPage 
+       {
+               protected override void Init()
+               {
+                       var layout = new StackLayout();
+                       var lastItem = "Item3";
+                       var listView = new ListView
+                       {
+                               ItemsSource = new List<string>
+                               {
+                                       "Item1",
+                                       "Item2",
+                                       lastItem
+                               }
+                       };
+
+                       var button = new Button
+                       {
+                               Text = "Select last item",
+                               AutomationId = "SelectLastItem"
+                       };
+
+                       button.Clicked += (_, __) => listView.SelectedItem = lastItem;
+                       layout.Children.Add(listView);
+                       layout.Children.Add(button);
+
+                       Content = layout;
+               }
+
+       }
+}
\ No newline at end of file

diff --git a/Xamarin.Forms.Controls.Issues/Xamarin.Forms.Controls.Issues.Shared/Xamarin.Forms.Controls.Issues.Shared.projitems b/Xamarin.Forms.Controls.Issues/Xamarin.Forms.Controls.Issues.Shared/Xamarin.Forms.Controls.Issues.Shared.projitems
index 00da685..f5c9c8a 100644 (file)
--- a/Xamarin.Forms.Controls.Issues/Xamarin.Forms.Controls.Issues.Shared/Xamarin.Forms.Controls.Issues.Shared.projitems
+++ b/Xamarin.Forms.Controls.Issues/Xamarin.Forms.Controls.Issues.Shared/Xamarin.Forms.Controls.Issues.Shared.projitems
@@ -548,6 +548,7 @@
     <Compile Include="$(MSBuildThisFileDirectory)Issue3988.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Issue2580.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Issue4026.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)Issue4748.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)_Template.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Bugzilla56298.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Bugzilla42620.cs" />

diff --git a/Xamarin.Forms.Platform.GTK/Renderers/ListViewRenderer.cs b/Xamarin.Forms.Platform.GTK/Renderers/ListViewRenderer.cs
index ab70213..e155a06 100644 (file)
--- a/Xamarin.Forms.Platform.GTK/Renderers/ListViewRenderer.cs
+++ b/Xamarin.Forms.Platform.GTK/Renderers/ListViewRenderer.cs
@@ -95,6 +95,8 @@ namespace Xamarin.Forms.Platform.GTK.Renderers
                                UpdateIsRefreshing();
                        else if (e.PropertyName == ListView.IsPullToRefreshEnabledProperty.PropertyName)
                                UpdatePullToRefreshEnabled();
+                       else if (e.PropertyName == ListView.SelectedItemProperty.PropertyName)
+                               UpdateSelectedItem();
                }
 
                protected override void Dispose(bool disposing)
@@ -436,6 +438,11 @@ namespace Xamarin.Forms.Platform.GTK.Renderers
                        }
                }
 
+               private void UpdateSelectedItem()
+               {
+                       _listView?.SetSeletedItem(Element.SelectedItem);
+               }
+
                private void UpdateGrouping()
                {
                        var templatedItems = TemplatedItemsView.TemplatedItems;