private Control Template(ItemsControl control)
{
return new ItemsPresenter
{
Name = "itemsPresenter",
[~ItemsPresenter.ItemsProperty] = control[~ItemsControl.ItemsProperty],
[~ItemsPresenter.ItemsPanelProperty] = control[~ItemsControl.ItemsPanelProperty],
};
}
/// <summary>
/// The default template for an <see cref="ItemsControl"/> control.
/// </summary>
/// <param name="control">The control being styled.</param>
/// <returns>The root of the instantiated template.</returns>
public static Control Template(ItemsControl control)
{
return new ItemsPresenter
{
Name = "itemsPresenter",
MemberSelector = control.MemberSelector,
[~ItemsPresenter.ItemsProperty] = control[~ItemsControl.ItemsProperty],
[~ItemsPresenter.ItemsPanelProperty] = control[~ItemsControl.ItemsPanelProperty],
};
}
public void Adding_Control_Item_Should_Make_Control_Appear_In_LogicalChildren()
{
var target = new ItemsControl();
var child = new Control();
target.Template = this.GetTemplate();
target.Items = new[] { child };
target.ApplyTemplate();
Assert.Equal(new[] { child }, ((ILogical)target).LogicalChildren.ToList());
}
public void Adding_String_Item_Should_Make_TextBlock_Appear_In_LogicalChildren()
{
var target = new ItemsControl();
var child = new Control();
target.Template = this.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 Changing_Items_Should_Fire_LogicalChildren_CollectionChanged()
{
var target = new ItemsControl();
var child = new Control();
var called = false;
target.Template = this.GetTemplate();
target.Items = new[] { child };
target.ApplyTemplate();
((ILogical)target).LogicalChildren.CollectionChanged += (s, e) => called = true;
target.Items = new[] { "Foo" };
Assert.True(called);
}
public void Adding_Items_Should_Fire_LogicalChildren_CollectionChanged()
{
var target = new ItemsControl();
var items = new PerspexList<string> { "Foo" };
var called = false;
target.Template = this.GetTemplate();
target.Items = items;
target.ApplyTemplate();
((ILogical)target).LogicalChildren.CollectionChanged += (s, e) =>
called = e.Action == NotifyCollectionChangedAction.Add;
items.Add("Bar");
Assert.True(called);
}
public void Clearing_Control_Item_Should_Clear_Child_Controls_Parent()
{
var target = new ItemsControl();
var child = new Control();
target.Template = this.GetTemplate();
target.Items = new[] { child };
target.ApplyTemplate();
target.Items = null;
Assert.Null(child.Parent);
Assert.Null(((ILogical)child).LogicalParent);
}
public void Setting_Items_To_Null_Should_Remove_LogicalChildren()
{
var target = new ItemsControl();
var child = new Control();
target.Template = this.GetTemplate();
target.Items = new[] { "Foo" };
target.ApplyTemplate();
target.Items = null;
Assert.Equal(new ILogical[0], ((ILogical)target).LogicalChildren.ToList());
}
public void Setting_Items_To_Null_Should_Fire_LogicalChildren_CollectionChanged()
{
var target = new ItemsControl();
var child = new Control();
var called = false;
target.Template = this.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 Panel_Should_Have_TemplatedParent_Set_To_ItemsControl()
{
var target = new ItemsControl();
target.Template = this.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 LogicalChildren_Should_Not_Change_Instance_When_Template_Changed()
{
var target = new ItemsControl()
{
Template = this.GetTemplate(),
};
var before = ((ILogical)target).LogicalChildren;
target.Template = null;
target.Template = this.GetTemplate();
var after = ((ILogical)target).LogicalChildren;
Assert.NotNull(before);
Assert.NotNull(after);
Assert.Same(before, after);
}
public void Item_Should_Have_TemplatedParent_Set_To_Null()
{
var target = new ItemsControl();
target.Template = this.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 Empty_Class_Should_Initially_Be_Applied()
{
var target = new ItemsControl()
{
Template = this.GetTemplate(),
};
Assert.True(target.Classes.Contains(":empty"));
}
public void Empty_Class_Should_Be_Set_When_Empty_Collection_Set()
{
var target = new ItemsControl()
{
Template = this.GetTemplate(),
Items = new[] { 1, 2, 3 },
};
target.Items = new int[0];
Assert.True(target.Classes.Contains(":empty"));
}
public void Empty_Class_Should_Be_Cleared_When_Items_Added()
{
var target = new ItemsControl()
{
Template = this.GetTemplate(),
Items = new[] { 1, 2, 3 },
};
Assert.False(target.Classes.Contains(":empty"));
}
public void Control_Item_Should_Have_Parent_Set()
{
var target = new ItemsControl();
var child = new Control();
target.Template = this.GetTemplate();
target.Items = new[] { child };
target.ApplyTemplate();
Assert.Equal(target, child.Parent);
Assert.Equal(target, ((ILogical)child).LogicalParent);
}