private static void UpdateItemsView(ItemsControl sender, AvaloniaPropertyChangedEventArgs e)
{
if (e.NewValue is null)
{
sender.ItemsPanel = ItemsControl.ItemsPanelProperty.GetDefaultValue(sender.GetType());
sender.DataTemplates.Clear();
return;
}
var view = (ItemsControlView)e.NewValue;
sender.ItemsPanel = view.PanelTemplate;
sender.DataTemplates.Clear();
sender.DataTemplates.AddRange(view.DataTemplates);
var template = sender.GetBaseValue(TemplatedControl.TemplateProperty, BindingPriority.LocalValue);
sender.SetValue(TemplatedControl.TemplateProperty, null);
sender.ApplyTemplate();
if (template.HasValue)
{
sender.SetValue(TemplatedControl.TemplateProperty, template.Value);
}
else
{
sender.ClearValue(TemplatedControl.TemplateProperty);
}
sender.ApplyTemplate();
}
public void Presenter_Items_Should_Be_In_Sync()
{
var target = new ItemsControl
{
Template = GetTemplate(),
Items = new object[]
{
new Button(),
new Button(),
},
};
var root = new TestRoot {
Child = target
};
var otherPanel = new StackPanel();
target.ApplyTemplate();
target.Presenter.ApplyTemplate();
target.ItemContainerGenerator.Materialized += (s, e) =>
{
Assert.IsType <Canvas>(e.Containers[0].Item);
};
target.Items = new[]
{
new Canvas()
};
}
public void When_EarlyItems()
{
var style = new Style(typeof(Windows.UI.Xaml.Controls.ItemsControl))
{
Setters =
{
new Setter <ItemsControl>("Template", t =>
t.Template = Funcs.Create(() =>
new ItemsPresenter()
)
)
}
};
var panel = new StackPanel();
var SUT = new ItemsControl()
{
Style = style,
ItemsPanel = new ItemsPanelTemplate(() => panel),
Items =
{
new Border {
Name = "b1"
}
}
};
SUT.ApplyTemplate();
// Search on the panel for now, as the name lookup is not properly
// aligned on net46.
Assert.IsNotNull(panel.FindName("b1"));
}
public void When_EarlyItems()
{
var style = new Style(typeof(Windows.UI.Xaml.Controls.ItemsControl))
{
Setters =
{
new Setter <ItemsControl>("Template", t =>
t.Template = Funcs.Create(() =>
new ItemsPresenter()
)
)
}
};
var panel = new StackPanel();
var SUT = new ItemsControl()
{
Style = style,
ItemsPanel = new ItemsPanelTemplate(() => panel),
Items =
{
new Border {
Name = "b1"
}
}
};
new Grid().Children.Add(SUT); // This is enough for now, but the `SUT` should be in the visual tree for its template to get applied
SUT.ApplyTemplate();
// Search on the panel for now, as the name lookup is not properly
// aligned on net46.
Assert.IsNotNull(panel.FindName("b1"));
}
public void LoadedA3()
{
bool loaded_before = false;
bool loaded_after = false;
// A user set Template will not walk up the tree and emit its parents loaded events
ItemsControl c = (ItemsControl)XamlReader.Load(@"
<ItemsControl
xmlns=""http://schemas.microsoft.com/winfx/2006/xaml/presentation""
xmlns:x=""http://schemas.microsoft.com/winfx/2006/xaml"">
<ItemsControl.Template>
<ControlTemplate>
<Grid />
</ControlTemplate>
</ItemsControl.Template>
</ItemsControl>
");
// Attach a handler before and after the element is added to the tree
c.Loaded += (o, e) => { loaded_before = true; };
TestPanel.Children.Add(c);
c.Loaded += (o, e) => loaded_after = true;
// Only one handler is invoked
EnqueueConditional(() => loaded_before, "#1");
Enqueue(() => c.ApplyTemplate());
Enqueue(() => Assert.IsFalse(loaded_after, "#2"));
EnqueueTestComplete();
}
public void When_ContainerStyleSet()
{
var count = 0;
var panel = new StackPanel();
var source = new ObservableVector <int>()
{
1, 2, 3
};
var SUT = new ItemsControl()
{
ItemsPanelRoot = panel,
ItemContainerStyle = BuildBasicContainerStyle(),
InternalItemsPanelRoot = panel,
ItemTemplate = new DataTemplate(() =>
{
count++;
return(new Border());
})
};
SUT.ApplyTemplate();
Assert.AreEqual(0, count);
SUT.ItemsSource = source;
Assert.AreEqual(3, count);
source.Add(4);
Assert.AreEqual(7, count);
source.Remove(1);
Assert.AreEqual(7, count);
}
public void Focuses_Next_Item_On_Key_Down()
{
using (UnitTestApplication.Start(TestServices.RealFocus))
{
var items = new object[]
{
new Button(),
new Button(),
};
var target = new ItemsControl
{
Template = GetTemplate(),
Items = items,
};
var root = new TestRoot {
Child = target
};
target.ApplyTemplate();
target.Presenter.ApplyTemplate();
target.Presenter.Panel.Children[0].Focus();
target.RaiseEvent(new KeyEventArgs
{
RoutedEvent = InputElement.KeyDownEvent,
Key = Key.Down,
});
Assert.Equal(
target.Presenter.Panel.Children[1],
FocusManager.Instance.Current);
}
}
/// <summary>
/// Forces the specified items control to generate containers for its items.
/// </summary>
/// <param name="itemsControl">The items control.</param>
private static void ForceItemsControlToGenerateContainers(ItemsControl itemsControl)
{
itemsControl.ApplyTemplate();
var itemsPresenter = (ItemsPresenter)itemsControl.Template.FindName("ItemsHost", itemsControl);
if (itemsPresenter != null)
{
itemsPresenter.ApplyTemplate();
}
else
{
// The Tree template has not named the ItemsPresenter, so walk the descendents and
// find the child.
itemsPresenter = itemsControl.FindVisualChild <ItemsPresenter>();
if (itemsPresenter == null)
{
itemsControl.UpdateLayout();
itemsPresenter = itemsControl.FindVisualChild <ItemsPresenter>();
}
}
if (itemsPresenter != null)
{
var itemsHostPanel = (Panel)VisualTreeHelper.GetChild(itemsPresenter, 0);
// Ensure that the generator for this panel has been created.
var children = itemsHostPanel.Children;
}
}
public void Should_Clear_Containers_When_ItemsPresenter_Changes()
{
var target = new ItemsControl
{
Items = new[] { "foo", "bar" },
Template = GetTemplate(),
};
target.ApplyTemplate();
target.Presenter.ApplyTemplate();
Assert.Equal(2, target.ItemContainerGenerator.Containers.Count());
target.Template = GetTemplate();
target.ApplyTemplate();
Assert.Empty(target.ItemContainerGenerator.Containers);
}
public void Panel_Should_Have_TemplatedParent_Set_To_ItemsControl()
{
var target = new ItemsControl();
target.Template = GetTemplate();
target.Items = new[] { "Foo" };
target.ApplyTemplate();
Assert.Equal(target, target.Presenter.Panel.TemplatedParent);
}
public void Panel_Should_Have_TemplatedParent_Set_To_ItemsControl()
{
var target = new ItemsControl();
target.Template = GetTemplate();
target.Items = new[] { "Foo" };
target.ApplyTemplate();
Assert.Equal(target, target.Presenter.Panel.TemplatedParent);
}
/// <summary>
/// ay 2015-05-23 15:34:08 增加,不需要查找子容器
/// </summary>
/// <param name="container"></param>
/// <param name="item"></param>
/// <returns></returns>
public static TreeViewItem GetTreeViewItem2(ItemsControl container, object item)
{
if (container != null)
{
if (container.DataContext == item)
{
return(container as TreeViewItem);
}
// Expand the current container
if (container is TreeViewItem && !((TreeViewItem)container).IsExpanded)
{
container.SetValue(TreeViewItem.IsExpandedProperty, true);
}
// Try to generate the ItemsPresenter and the ItemsPanel.
// by calling ApplyTemplate. Note that in the
// virtualizing case even if the item is marked
// expanded we still need to do this step in order to
// regenerate the visuals because they may have been virtualized away.
container.ApplyTemplate();
ItemsPresenter itemsPresenter =
(ItemsPresenter)container.Template.FindName("ItemsHost", container);
if (itemsPresenter != null)
{
itemsPresenter.ApplyTemplate();
}
else
{
// The Tree template has not named the ItemsPresenter,
// so walk the descendents and find the child.
itemsPresenter = WpfTreeHelper.FindVisualChild <ItemsPresenter>(container);
if (itemsPresenter == null)
{
container.UpdateLayout();
itemsPresenter = WpfTreeHelper.FindVisualChild <ItemsPresenter>(container);
}
}
Panel itemsHostPanel = (Panel)VisualTreeHelper.GetChild(itemsPresenter, 0);
// Ensure that the generator for this panel has been created.
UIElementCollection children = itemsHostPanel.Children;
MyVirtualizingStackPanel virtualizingPanel =
itemsHostPanel as MyVirtualizingStackPanel;
for (int i = 0, count = container.Items.Count; i < count; i++)
{
TreeViewItem subContainer = (TreeViewItem)container.ItemContainerGenerator.ContainerFromIndex(i);
if (subContainer.DataContext == item)
{
subContainer.IsExpanded = false;
return(subContainer as TreeViewItem);
}
}
}
return(null);
}
public void Adding_Control_Item_Should_Make_Control_Appear_In_LogicalChildren()
{
var target = new ItemsControl();
var child = new Control();
target.Template = GetTemplate();
target.Items = new[] { child };
target.ApplyTemplate();
Assert.Equal(new[] { child }, ((ILogical)target).LogicalChildren.ToList());
}
public void Adding_Control_Item_Should_Make_Control_Appear_In_LogicalChildren()
{
var target = new ItemsControl();
var child = new Control();
target.Template = GetTemplate();
target.Items = new[] { child };
target.ApplyTemplate();
Assert.Equal(new[] { child }, ((ILogical)target).LogicalChildren.ToList());
}
public void Control_Item_Should_Have_Parent_Set()
{
var target = new ItemsControl();
var child = new Control();
target.Template = GetTemplate();
target.Items = new[] { child };
target.ApplyTemplate();
Assert.Equal(target, child.Parent);
Assert.Equal(target, ((ILogical)child).LogicalParent);
}
public void Setting_Items_To_Null_Should_Remove_LogicalChildren()
{
var target = new ItemsControl();
var child = new Control();
target.Template = GetTemplate();
target.Items = new[] { "Foo" };
target.ApplyTemplate();
target.Items = null;
Assert.Equal(new ILogical[0], ((ILogical)target).LogicalChildren.ToList());
}
public void Control_Item_Should_Have_Parent_Set()
{
var target = new ItemsControl();
var child = new Control();
target.Template = GetTemplate();
target.Items = new[] { child };
target.ApplyTemplate();
Assert.Equal(target, child.Parent);
Assert.Equal(target, ((ILogical)child).LogicalParent);
}
public void Item_Should_Have_TemplatedParent_Set_To_Null()
{
var target = new ItemsControl();
target.Template = GetTemplate();
target.Items = new[] { "Foo" };
target.ApplyTemplate();
var item = (TextBlock)target.Presenter.Panel.GetVisualChildren().First();
Assert.Null(item.TemplatedParent);
}
public void Item_Should_Have_TemplatedParent_Set_To_Null()
{
var target = new ItemsControl();
target.Template = GetTemplate();
target.Items = new[] { "Foo" };
target.ApplyTemplate();
var item = (TextBlock)target.Presenter.Panel.GetVisualChildren().First();
Assert.Null(item.TemplatedParent);
}
public virtual void ItemTemplateTest3()
{
ItemsControl box = (ItemsControl)CurrentControl;
CurrentControl.ItemTemplate = null;
TestPanel.Children.Add(box);
Enqueue(() => CurrentControl.DisplayMemberPath = "Test");
Enqueue(() => box.ApplyTemplate());
Enqueue(() => CurrentControl.Items.Add(new object()));
// Subclasses do the validation
}
public void Clearing_Control_Item_Should_Clear_Child_Controls_Parent()
{
var target = new ItemsControl();
var child = new Control();
target.Template = GetTemplate();
target.Items = new[] { child };
target.ApplyTemplate();
target.Items = null;
Assert.Null(child.Parent);
Assert.Null(((ILogical)child).LogicalParent);
}
public void Panel_Should_Have_TemplatedParent_Set_To_ItemsControl()
{
var target = new ItemsControl();
target.Template = GetTemplate();
target.Items = new[] { "Foo" };
target.ApplyTemplate();
var presenter = target.GetTemplateChildren().OfType<ItemsPresenter>().Single();
var panel = target.GetTemplateChildren().OfType<StackPanel>().Single();
Assert.Equal(target, panel.TemplatedParent);
}
public virtual void DisableControlTest()
{
ItemsControl c = (ItemsControl)CurrentControl;
CurrentControl.IsEnabled = false;
CurrentControl.Items.Add(new ListBox());
CurrentControl.Items.Add(new ComboBox());
CurrentControl.Items.Add(new Button());
EnqueueWaitLoaded(c, "#1");
Enqueue(() => c.ApplyTemplate());
TestPanel.Children.Add((Control)CurrentControl);
}
public void Container_Should_Have_TemplatedParent_Set_To_Null()
{
var target = new ItemsControl();
target.Template = GetTemplate();
target.Items = new[] { "Foo" };
target.ApplyTemplate();
target.Presenter.ApplyTemplate();
var container = (ContentPresenter)target.Presenter.Panel.Children[0];
Assert.Null(container.TemplatedParent);
}
public void Panel_Should_Have_TemplatedParent_Set_To_ItemsControl()
{
var target = new ItemsControl();
target.Template = GetTemplate();
target.Items = new[] { "Foo" };
target.ApplyTemplate();
var presenter = target.GetTemplateChildren().OfType <ItemsPresenter>().Single();
var panel = target.GetTemplateChildren().OfType <StackPanel>().Single();
Assert.Equal(target, panel.TemplatedParent);
}
public void Container_Should_Have_TemplatedParent_Set_To_Null()
{
var target = new ItemsControl();
target.Template = GetTemplate();
target.Items = new[] { "Foo" };
target.ApplyTemplate();
target.Presenter.ApplyTemplate();
var container = (ContentPresenter)target.Presenter.Panel.Children[0];
Assert.Null(container.TemplatedParent);
}
public void Clearing_Items_Should_Clear_Child_Controls_Parent()
{
var target = new ItemsControl();
var child = new Control();
target.Template = GetTemplate();
target.Items = new[] { child };
target.ApplyTemplate();
target.Items = null;
Assert.Null(child.Parent);
Assert.Null(((ILogical)child).LogicalParent);
}
public virtual void DisplayMemberPathTest2()
{
// Check if 'DisplayMemberPath' is used when a UIElement
// is added to the ItemsCollection
ItemsControl c = (ItemsControl)CurrentControl;
CurrentControl.DisplayMemberPath = "Width";
TestPanel.Children.Add(c);
Enqueue(() => c.ItemTemplate = null);
Enqueue(() => c.ApplyTemplate());
Enqueue(() => c.Items.Add(new object()));
// Validation is performed in the subclasses
}
public void Adding_String_Item_Should_Make_TextBlock_Appear_In_LogicalChildren()
{
var target = new ItemsControl();
var child = new Control();
target.Template = GetTemplate();
target.Items = new[] { "Foo" };
target.ApplyTemplate();
var logical = (ILogical)target;
Assert.Equal(1, logical.LogicalChildren.Count);
Assert.IsType <TextBlock>(logical.LogicalChildren[0]);
}
public void Presenter_Items_Should_Be_In_Sync_When_Replacing_ItemTemplate()
{
var target = new ItemsControl
{
Template = GetTemplate(),
Items = new[]
{
new Item("Item1")
},
ItemTemplate = new FuncDataTemplate <Item>((x, ns) => new TextBlock())
};
var root = new TestRoot {
Child = target
};
var otherPanel = new StackPanel();
target.ApplyTemplate();
target.Presenter.ApplyTemplate();
int dematerializedEventCallCount = 0;
target.ItemContainerGenerator.Dematerialized += (s, e) =>
{
Assert.IsType <Item>(e.Containers[0].Item);
Assert.Equal("Item1", ((Item)e.Containers[0].Item).Value);
var contentPresenter = ((ContentPresenter)e.Containers[0].ContainerControl);
contentPresenter.UpdateChild();
Assert.IsType <TextBlock>(contentPresenter.Child);
dematerializedEventCallCount++;
};
int materializedEventCallCount = 0;
target.ItemContainerGenerator.Materialized += (s, e) =>
{
Assert.IsType <Item>(e.Containers[0].Item);
Assert.Equal("Item1", ((Item)e.Containers[0].Item).Value);
var contentPresenter = ((ContentPresenter)e.Containers[0].ContainerControl);
contentPresenter.UpdateChild();
Assert.IsType <Canvas>(contentPresenter.Child);
materializedEventCallCount++;
};
target.ItemTemplate =
new FuncDataTemplate <Item>((x, ns) => new Canvas());
Assert.Equal(1, dematerializedEventCallCount);
Assert.Equal(1, materializedEventCallCount);
}
public void Item_Should_Have_TemplatedParent_Set_To_Null()
{
var target = new ItemsControl();
target.Template = GetTemplate();
target.Items = new[] { "Foo" };
target.ApplyTemplate();
var presenter = target.GetTemplateChildren().OfType <ItemsPresenter>().Single();
var panel = target.GetTemplateChildren().OfType <StackPanel>().Single();
var item = (TextBlock)panel.GetVisualChildren().First();
Assert.Null(item.TemplatedParent);
}
public void Item_Should_Have_TemplatedParent_Set_To_Null()
{
var target = new ItemsControl();
target.Template = GetTemplate();
target.Items = new[] { "Foo" };
target.ApplyTemplate();
var presenter = target.GetTemplateChildren().OfType<ItemsPresenter>().Single();
var panel = target.GetTemplateChildren().OfType<StackPanel>().Single();
var item = (TextBlock)panel.GetVisualChildren().First();
Assert.Null(item.TemplatedParent);
}
public void Adding_String_Item_Should_Make_TextBlock_Appear_In_LogicalChildren()
{
var target = new ItemsControl();
var child = new Control();
target.Template = GetTemplate();
target.Items = new[] { "Foo" };
target.ApplyTemplate();
target.Presenter.ApplyTemplate();
var logical = (ILogical)target;
Assert.Equal(1, logical.LogicalChildren.Count);
Assert.IsType<TextBlock>(logical.LogicalChildren[0]);
}
public void Should_Use_ItemTemplate_To_Create_Control()
{
var target = new ItemsControl
{
Template = GetTemplate(),
ItemTemplate = new FuncDataTemplate <string>(_ => new Canvas()),
};
target.Items = new[] { "Foo" };
target.ApplyTemplate();
target.Presenter.ApplyTemplate();
Assert.IsType <Canvas>(target.Presenter.Panel.Children[0]);
}
public virtual void StructureChanged_Events()
{
if (!EventsManager.Instance.AutomationSingletonExists)
{
EnqueueTestComplete();
return;
}
bool concreteLoaded = false;
ItemsControl concrete = CreateConcreteFrameworkElement() as ItemsControl;
concrete.Loaded += (o, e) => concreteLoaded = true;
TestPanel.Children.Add(concrete);
EnqueueConditional(() => concreteLoaded, "ConcreteLoaded #0");
Enqueue(() => concrete.ApplyTemplate());
Enqueue(() => {
AutomationPeer peer = FrameworkElementAutomationPeer.CreatePeerForElement(concrete);
Assert.IsNotNull(peer, "FrameworkElementAutomationPeer.CreatePeerForElement #0");
AutomationEventTuple tuple
= EventsManager.Instance.GetAutomationEventFrom(peer, AutomationEvents.StructureChanged);
Assert.IsNull(tuple, "GetAutomationEventFrom #0");
});
Enqueue(() => {
EventsManager.Instance.Reset();
concrete.Items.Add(new ListBoxItem()
{
Content = "Item 0"
});
});
Enqueue(() => {
AutomationPeer peer = FrameworkElementAutomationPeer.CreatePeerForElement(concrete);
Assert.IsNotNull(peer, "FrameworkElementAutomationPeer.CreatePeerForElement #1");
AutomationEventTuple tuple
= EventsManager.Instance.GetAutomationEventFrom(peer, AutomationEvents.StructureChanged);
Assert.IsNotNull(tuple, "GetAutomationEventFrom #1");
});
Enqueue(() => {
EventsManager.Instance.Reset();
concrete.Items.RemoveAt(0);
});
Enqueue(() => {
AutomationPeer peer = FrameworkElementAutomationPeer.CreatePeerForElement(concrete);
Assert.IsNotNull(peer, "FrameworkElementAutomationPeer.CreatePeerForElement #2");
AutomationEventTuple tuple
= EventsManager.Instance.GetAutomationEventFrom(peer, AutomationEvents.StructureChanged);
Assert.IsNotNull(tuple, "GetAutomationEventFrom #2");
});
EnqueueTestComplete();
}
public void Adding_Control_Item_Should_Make_Control_Appear_In_LogicalChildren()
{
var target = new ItemsControl();
var child = new Control();
target.Template = GetTemplate();
target.Items = new[] { child };
// Should appear both before and after applying template.
Assert.Equal(new ILogical[] { child }, target.GetLogicalChildren());
target.ApplyTemplate();
Assert.Equal(new ILogical[] { child }, target.GetLogicalChildren());
}
public void Adding_Control_Item_Should_Make_Control_Appear_In_LogicalChildren()
{
var target = new ItemsControl();
var child = new Control();
target.Template = GetTemplate();
target.Items = new[] { child };
// Should appear both before and after applying template.
Assert.Equal(new ILogical[] { child }, target.GetLogicalChildren());
target.ApplyTemplate();
Assert.Equal(new ILogical[] { child }, target.GetLogicalChildren());
}
public void Changing_Items_Should_Fire_LogicalChildren_CollectionChanged()
{
var target = new ItemsControl();
var child = new Control();
var called = false;
target.Template = GetTemplate();
target.Items = new[] { child };
target.ApplyTemplate();
((ILogical)target).LogicalChildren.CollectionChanged += (s, e) => called = true;
target.Items = new[] { "Foo" };
Assert.True(called);
}
public void Setting_Items_To_Null_Should_Remove_LogicalChildren()
{
var target = new ItemsControl();
var child = new Control();
target.Template = GetTemplate();
target.Items = new[] { "Foo" };
target.ApplyTemplate();
target.Presenter.ApplyTemplate();
Assert.NotEmpty(target.GetLogicalChildren());
target.Items = null;
Assert.Equal(new ILogical[0], target.GetLogicalChildren());
}
public void Setting_Items_To_Null_Should_Fire_LogicalChildren_CollectionChanged()
{
var target = new ItemsControl();
var child = new Control();
var called = false;
target.Template = GetTemplate();
target.Items = new[] { child };
target.ApplyTemplate();
((ILogical)target).LogicalChildren.CollectionChanged += (s, e) =>
called = e.Action == NotifyCollectionChangedAction.Remove;
target.Items = null;
Assert.True(called);
}
public void Should_Use_ItemTemplate_To_Create_Control()
{
var target = new ItemsControl
{
Template = GetTemplate(),
ItemTemplate = new FuncDataTemplate<string>(_ => new Canvas()),
};
target.Items = new[] { "Foo" };
target.ApplyTemplate();
target.Presenter.ApplyTemplate();
var container = (ContentPresenter)target.Presenter.Panel.Children[0];
container.UpdateChild();
Assert.IsType<Canvas>(container.Child);
}
public void Nested_TemplatedControls_Should_Be_Expanded_And_Have_Correct_TemplatedParent()
{
var target = new ItemsControl
{
Template = new ControlTemplate<ItemsControl>(ItemsControlTemplate),
Items = new[] { "Foo", }
};
target.ApplyTemplate();
var scrollViewer = target.GetVisualDescendents()
.OfType<ScrollViewer>()
.Single();
var types = target.GetVisualDescendents()
.Select(x => x.GetType())
.ToList();
var templatedParents = target.GetVisualDescendents()
.OfType<IControl>()
.Select(x => x.TemplatedParent)
.ToList();
Assert.Equal(
new[]
{
typeof(Border),
typeof(ScrollViewer),
typeof(ScrollContentPresenter),
typeof(ItemsPresenter),
typeof(StackPanel),
typeof(TextBlock),
},
types);
Assert.Equal(
new object[]
{
target,
target,
scrollViewer,
target,
target,
null
},
templatedParents);
}
public void Adding_Items_Should_Fire_LogicalChildren_CollectionChanged()
{
var target = new ItemsControl();
var items = new PerspexList<string> { "Foo" };
var called = false;
target.Template = GetTemplate();
target.Items = items;
target.ApplyTemplate();
target.Presenter.ApplyTemplate();
((ILogical)target).LogicalChildren.CollectionChanged += (s, e) =>
called = e.Action == NotifyCollectionChangedAction.Add;
items.Add("Bar");
Assert.True(called);
}
public void Container_Child_Should_Have_LogicalParent_Set_To_Container()
{
using (UnitTestApplication.Start(TestServices.StyledWindow))
{
var root = new Window();
var target = new ItemsControl();
root.Content = target;
var templatedParent = new Button();
target.TemplatedParent = templatedParent;
target.Template = GetTemplate();
target.Items = new[] { "Foo" };
root.ApplyTemplate();
target.ApplyTemplate();
target.Presenter.ApplyTemplate();
var container = (ContentPresenter)target.Presenter.Panel.Children[0];
Assert.Equal(container, container.Child.Parent);
}
}
public void Setting_Items_To_Null_Should_Fire_LogicalChildren_CollectionChanged()
{
var target = new ItemsControl();
var child = new Control();
var called = false;
target.Template = GetTemplate();
target.Items = new[] { child };
target.ApplyTemplate();
((ILogical)target).LogicalChildren.CollectionChanged += (s, e) =>
called = e.Action == NotifyCollectionChangedAction.Remove;
target.Items = null;
Assert.True(called);
}
public void Changing_Items_Should_Fire_LogicalChildren_CollectionChanged()
{
var target = new ItemsControl();
var child = new Control();
var called = false;
target.Template = GetTemplate();
target.Items = new[] { child };
target.ApplyTemplate();
((ILogical)target).LogicalChildren.CollectionChanged += (s, e) => called = true;
target.Items = new[] { "Foo" };
Assert.True(called);
}
public void DataContexts_Should_Be_Correctly_Set()
{
var items = new object[]
{
"Foo",
new Item("Bar"),
new TextBlock { Text = "Baz" },
new ListBoxItem { Content = "Qux" },
};
var target = new ItemsControl
{
Template = GetTemplate(),
DataContext = "Base",
DataTemplates = new DataTemplates
{
new FuncDataTemplate<Item>(x => new Button { Content = x })
},
Items = items,
};
target.ApplyTemplate();
target.Presenter.ApplyTemplate();
var dataContexts = target.Presenter.Panel.Children
.Do(x => (x as ContentPresenter)?.UpdateChild())
.Cast<Control>()
.Select(x => x.DataContext)
.ToList();
Assert.Equal(
new object[] { items[0], items[1], "Base", "Base" },
dataContexts);
}
public void MemberSelector_Should_Select_Member()
{
var target = new ItemsControl
{
Template = GetTemplate(),
Items = new[] { new Item("Foo"), new Item("Bar") },
MemberSelector = new FuncMemberSelector<Item, string>(x => x.Value),
};
target.ApplyTemplate();
target.Presenter.ApplyTemplate();
var text = target.Presenter.Panel.Children
.Cast<ContentPresenter>()
.Select(x => x.Content)
.ToList();
Assert.Equal(new[] { "Foo", "Bar" }, text);
}
public void Setting_Items_To_Null_Should_Remove_LogicalChildren()
{
var target = new ItemsControl();
var child = new Control();
target.Template = GetTemplate();
target.Items = new[] { "Foo" };
target.ApplyTemplate();
target.Items = null;
Assert.Equal(new ILogical[0], ((ILogical)target).LogicalChildren.ToList());
}
public void DataTemplate_Created_Content_Should_Be_NameScope()
{
var items = new object[]
{
"foo",
};
var target = new ItemsControl
{
Template = GetTemplate(),
Items = items,
};
target.ApplyTemplate();
target.Presenter.ApplyTemplate();
var container = (ContentPresenter)target.Presenter.Panel.LogicalChildren[0];
container.UpdateChild();
Assert.NotNull(NameScope.GetNameScope((TextBlock)container.Child));
}
public void Control_Item_Should_Not_Be_NameScope()
{
var items = new object[]
{
new TextBlock(),
};
var target = new ItemsControl
{
Template = GetTemplate(),
Items = items,
};
target.ApplyTemplate();
target.Presenter.ApplyTemplate();
var item = target.Presenter.Panel.LogicalChildren[0];
Assert.Null(NameScope.GetNameScope((TextBlock)item));
}
public void Setting_Items_To_Null_Should_Remove_LogicalChildren()
{
var target = new ItemsControl();
var child = new Control();
target.Template = GetTemplate();
target.Items = new[] { "Foo" };
target.ApplyTemplate();
target.Presenter.ApplyTemplate();
Assert.NotEmpty(target.GetLogicalChildren());
target.Items = null;
Assert.Equal(new ILogical[0], target.GetLogicalChildren());
}