コード例 #1
0
        public void ValidateChildRemovedFromParentWhenOwnerIsDifferent()
        {
            RunOnUIThread.Execute(() =>
            {
                var element       = new Button();
                const string key1 = "Key1";
                const string key2 = "Key2";

                RecyclePool pool = new RecyclePool();
                var parent1      = new StackPanel();
                var child1       = new Button();
                var child2       = new Button();
                parent1.Children.Add(child1);
                parent1.Children.Add(child2);

                pool.PutElement(child1, key1);
                pool.PutElement(child2, key2);

                var parent2 = new StackPanel();
                // Recycle the second child for a different parent. It should be disconnected
                var recycled1 = (FrameworkElement)pool.TryGetElement(key2, parent2);
                Verify.IsNull(recycled1.Parent);
                var recycled2 = (FrameworkElement)pool.TryGetElement(key1, parent2);
                Verify.IsNull(recycled2.Parent);
            });
        }
コード例 #2
0
        public void ValidateElementsHaveCorrectKeys()
        {
            RunOnUIThread.Execute(() =>
            {
                var element                = new Button();
                const string buttonKey     = "ButtonKey";
                const string textBlockKey  = "TextBlockKey";
                const string stackPanelKey = "StackPanelKey";

                RecyclePool pool = new RecyclePool();
                pool.PutElement(new Button(), buttonKey);
                pool.PutElement(new TextBlock(), textBlockKey);
                pool.PutElement(new StackPanel(), stackPanelKey);
                pool.PutElement(new Button(), buttonKey);
                pool.PutElement(new TextBlock(), textBlockKey);
                pool.PutElement(new StackPanel(), stackPanelKey);
                pool.PutElement(new Button(), buttonKey);
                pool.PutElement(new TextBlock(), textBlockKey);
                pool.PutElement(new StackPanel(), stackPanelKey);

                Verify.IsNotNull((Button)pool.TryGetElement(buttonKey));
                Verify.IsNotNull((Button)pool.TryGetElement(buttonKey));
                Verify.IsNotNull((Button)pool.TryGetElement(buttonKey));
                Verify.IsNull(pool.TryGetElement(buttonKey));

                Verify.IsNotNull((TextBlock)pool.TryGetElement(textBlockKey));
                Verify.IsNotNull((TextBlock)pool.TryGetElement(textBlockKey));
                Verify.IsNotNull((TextBlock)pool.TryGetElement(textBlockKey));
                Verify.IsNull(pool.TryGetElement(textBlockKey));

                Verify.IsNotNull((StackPanel)pool.TryGetElement(stackPanelKey));
                Verify.IsNotNull((StackPanel)pool.TryGetElement(stackPanelKey));
                Verify.IsNotNull((StackPanel)pool.TryGetElement(stackPanelKey));
                Verify.IsNull(pool.TryGetElement(stackPanelKey));


                Verify.Throws <COMException>(delegate
                {
                    pool.PutElement(new Button(), null, null);
                });

                Verify.Throws <COMException>(delegate
                {
                    pool.PutElement(new Button(), buttonKey, new Button() /* not a panel */);
                });

                Verify.Throws <COMException>(delegate
                {
                    pool.TryGetElement(null, null);
                });
            });
        }
コード例 #3
0
 public void ValidateOwnershipWithStackPanel()
 {
     RunOnUIThread.Execute(() =>
     {
         RecyclePool pool = new RecyclePool();
         var owner        = new StackPanel();
         var child        = new Button();
         owner.Children.Add(child);
         pool.PutElement(child, "Key", owner);
         var recycled = pool.TryGetElement("Key", owner);
         Verify.AreSame(child, recycled);
         Verify.AreEqual(0, owner.Children.IndexOf(child));
     });
 }
コード例 #4
0
        public void ValidateRecycledElementOwnerAffinity()
        {
            RunOnUIThread.Execute(() =>
            {
                ItemsRepeater repeater1 = null;
                ItemsRepeater repeater2 = null;
                const int numItems      = 10;
                var dataCollection      = new ObservableCollection <int>(Enumerable.Range(0, numItems));
                const string recycleKey = "key";

                var dataSource   = MockItemsSource.CreateDataSource <int>(dataCollection, true);
                var layout       = new StackLayout();
                var recyclePool  = new RecyclePool();
                var itemTemplate = (DataTemplate)XamlReader.Load(
                    @"<DataTemplate  xmlns='http://schemas.microsoft.com/winfx/2006/xaml/presentation'>
                         <TextBlock Text='{Binding}' />
                    </DataTemplate>");

                repeater1 = new ItemsRepeater()
                {
                    ItemsSource = dataSource,
                    Layout      = layout,
#if BUILD_WINDOWS
                    ItemTemplate = (Windows.UI.Xaml.IElementFactory) new RecyclingElementFactoryDerived()
#else
                    ItemTemplate = new RecyclingElementFactoryDerived()
#endif
                    {
                        Templates            = { { "key", itemTemplate } },
                        RecyclePool          = recyclePool,
                        SelectTemplateIdFunc = (object data, UIElement owner) => recycleKey
                    }
                };

                repeater2 = new ItemsRepeater()
                {
                    ItemsSource = dataSource,
                    Layout      = layout,
#if BUILD_WINDOWS
                    ItemTemplate = (Windows.UI.Xaml.IElementFactory) new RecyclingElementFactoryDerived()
#else
                    ItemTemplate = new RecyclingElementFactoryDerived()
#endif
                    {
                        Templates            = { { "key", itemTemplate } },
                        RecyclePool          = recyclePool,
                        SelectTemplateIdFunc = (object data, UIElement owner) => recycleKey
                    }
                };

                var root = new StackPanel();
                root.Children.Add(repeater1);
                root.Children.Add(repeater2);

                Content = new ScrollAnchorProvider()
                {
                    Width   = 400,
                    Height  = 400,
                    Content = new ScrollViewer()
                    {
                        Content = root
                    }
                };

                Content.UpdateLayout();
                Verify.AreEqual(numItems, VisualTreeHelper.GetChildrenCount(repeater1));
                Verify.AreEqual(numItems, VisualTreeHelper.GetChildrenCount(repeater2));

                // Throw all the elements into the recycle pool
                dataCollection.Clear();
                Content.UpdateLayout();

                for (int i = 0; i < numItems; i++)
                {
                    var element1 = (FrameworkElement)recyclePool.TryGetElement(recycleKey, repeater1);
                    Verify.AreSame(repeater1, element1.Parent);

                    var element2 = (FrameworkElement)recyclePool.TryGetElement(recycleKey, repeater2);
                    Verify.AreSame(repeater2, element2.Parent);
                }
            });
        }