public void Removing_Selected_Item_Should_Clear_Selection()
{
var items = new AvaloniaList <Item>
{
new Item(),
new Item(),
};
var target = new SelectingItemsControl
{
Items = items,
Template = Template(),
};
target.ApplyTemplate();
target.SelectedIndex = 1;
Assert.Equal(items[1], target.SelectedItem);
Assert.Equal(1, target.SelectedIndex);
items.RemoveAt(1);
Assert.Null(target.SelectedItem);
Assert.Equal(-1, target.SelectedIndex);
}
public void Should_Handle_Null_Items()
{
var items = new AvaloniaList <string>(new[] { "foo", null, "bar" });
var target = new ItemsPresenter
{
Items = items,
};
target.ApplyTemplate();
var text = target.Panel.Children.Cast <ContentPresenter>().Select(x => x.Content).ToList();
Assert.Equal(new[] { "foo", null, "bar" }, text);
Assert.NotNull(target.ItemContainerGenerator.ContainerFromIndex(0));
Assert.NotNull(target.ItemContainerGenerator.ContainerFromIndex(1));
Assert.NotNull(target.ItemContainerGenerator.ContainerFromIndex(2));
items.RemoveAt(1);
text = target.Panel.Children.Cast <ContentPresenter>().Select(x => x.Content).ToList();
Assert.Equal(new[] { "foo", "bar" }, text);
Assert.NotNull(target.ItemContainerGenerator.ContainerFromIndex(0));
Assert.NotNull(target.ItemContainerGenerator.ContainerFromIndex(1));
}
protected override void Initialize(AvaloniaList <TreeNode> nodes)
{
_subscription = _control.VisualChildren.ForEachItem(
(i, item) => nodes.Insert(i, new VisualTreeNode(item, Owner)),
(i, item) => nodes.RemoveAt(i),
() => nodes.Clear());
}
public void Removing_Selected_Item_Should_Clear_Selection()
{
var items = new AvaloniaList <Item>
{
new Item(),
new Item(),
};
var target = new SelectingItemsControl
{
Items = items,
Template = Template(),
};
target.ApplyTemplate();
target.SelectedIndex = 1;
Assert.Equal(items[1], target.SelectedItem);
Assert.Equal(1, target.SelectedIndex);
SelectionChangedEventArgs receivedArgs = null;
target.SelectionChanged += (_, args) => receivedArgs = args;
var removed = items[1];
items.RemoveAt(1);
Assert.Null(target.SelectedItem);
Assert.Equal(-1, target.SelectedIndex);
Assert.NotNull(receivedArgs);
Assert.Empty(receivedArgs.AddedItems);
Assert.Equal(new[] { removed }, receivedArgs.RemovedItems);
}
public void Selection_Should_Be_Cleared_When_No_Items_Left()
{
var items = new AvaloniaList<string>(new[] { "foo", "bar" });
var target = new TestSelector
{
Items = items,
Template = Template(),
};
target.ApplyTemplate();
target.SelectedIndex = 1;
items.RemoveAt(1);
items.RemoveAt(0);
Assert.Equal(-1, target.SelectedIndex);
Assert.Null(target.SelectedItem);
}
public void Selection_Should_Be_Cleared_When_No_Items_Left()
{
var items = new AvaloniaList <string>(new[] { "foo", "bar" });
var target = new TestSelector
{
Items = items,
Template = Template(),
};
target.ApplyTemplate();
target.SelectedIndex = 1;
items.RemoveAt(1);
items.RemoveAt(0);
Assert.Equal(-1, target.SelectedIndex);
Assert.Null(target.SelectedItem);
}
public void Control_Item_Should_Be_Removed_From_Logical_Children_Before_ApplyTemplate()
{
var target = new ItemsControl();
var child = new Control();
var items = new AvaloniaList <Control>(child);
target.Template = GetTemplate();
target.Items = items;
items.RemoveAt(0);
Assert.Null(child.Parent);
Assert.Null(child.GetLogicalParent());
Assert.Empty(target.GetLogicalChildren());
}
public void Should_Remove_Containers()
{
var items = new AvaloniaList <string>(new[] { "foo", "bar" });
var target = new ItemsPresenter
{
Items = items,
};
target.ApplyTemplate();
items.RemoveAt(0);
Assert.Equal(1, target.Panel.Children.Count);
Assert.Equal("bar", ((ContentPresenter)target.Panel.Children[0]).Content);
Assert.Equal("bar", ((ContentPresenter)target.ItemContainerGenerator.ContainerFromIndex(0)).Content);
}
public void Should_Handle_Duplicate_Items()
{
var items = new AvaloniaList <int>(new[] { 1, 2, 1 });
var target = new ItemsPresenter
{
Items = items,
};
target.ApplyTemplate();
items.RemoveAt(2);
var text = target.Panel.Children.OfType <TextBlock>().Select(x => x.Text);
Assert.Equal(new[] { "1", "2" }, text);
}
public void Removing_Selected_First_Item_Should_Select_Next_Item()
{
var items = new AvaloniaList <string>(new[] { "foo", "bar" });
var target = new TestSelector
{
Items = items,
Template = Template(),
};
target.ApplyTemplate();
target.Presenter.ApplyTemplate();
items.RemoveAt(0);
Assert.Equal(0, target.SelectedIndex);
Assert.Equal("bar", target.SelectedItem);
Assert.Equal(new[] { ":selected" }, target.Presenter.Panel.Children[0].Classes);
}
public void Item_Should_Be_Selected_When_Selection_Removed()
{
var items = new AvaloniaList <string>(new[] { "foo", "bar", "baz", "qux" });
var target = new TestSelector
{
Items = items,
Template = Template(),
};
target.ApplyTemplate();
target.SelectedIndex = 2;
items.RemoveAt(2);
Assert.Equal(2, target.SelectedIndex);
Assert.Equal("qux", target.SelectedItem);
}
public void Item_Should_Be_Selected_When_Selection_Removed()
{
var items = new AvaloniaList<string>(new[] { "foo", "bar", "baz", "qux" });
var target = new TestSelector
{
Items = items,
Template = Template(),
};
target.ApplyTemplate();
target.SelectedIndex = 2;
items.RemoveAt(2);
Assert.Equal(2, target.SelectedIndex);
Assert.Equal("qux", target.SelectedItem);
}
public void Should_Handle_Duplicate_Items()
{
var items = new AvaloniaList <int>(new[] { 1, 2, 1 });
var target = new ItemsPresenter
{
Items = items,
};
target.ApplyTemplate();
items.RemoveAt(2);
var numbers = target.Panel.Children
.OfType <ContentPresenter>()
.Select(x => x.Content)
.Cast <int>();
Assert.Equal(new[] { 1, 2 }, numbers);
}
public void Removing_Selected_Item_Should_Clear_Selection_With_BeginInit()
{
var items = new AvaloniaList <Item>
{
new Item(),
new Item(),
};
var target = new SelectingItemsControl();
target.BeginInit();
target.Items = items;
target.Template = Template();
target.EndInit();
target.ApplyTemplate();
target.Presenter.ApplyTemplate();
target.SelectedIndex = 0;
Assert.Equal(items[0], target.SelectedItem);
Assert.Equal(0, target.SelectedIndex);
SelectionChangedEventArgs receivedArgs = null;
target.SelectionChanged += (_, args) => receivedArgs = args;
var removed = items[0];
items.RemoveAt(0);
Assert.Null(target.SelectedItem);
Assert.Equal(-1, target.SelectedIndex);
Assert.NotNull(receivedArgs);
Assert.Empty(receivedArgs.AddedItems);
Assert.Equal(new[] { removed }, receivedArgs.RemovedItems);
Assert.False(items.Single().IsSelected);
}
public void Removing_Selected_Item_Should_Clear_Selection()
{
var items = new AvaloniaList<Item>
{
new Item(),
new Item(),
};
var target = new SelectingItemsControl
{
Items = items,
Template = Template(),
};
target.ApplyTemplate();
target.SelectedIndex = 1;
Assert.Equal(items[1], target.SelectedItem);
Assert.Equal(1, target.SelectedIndex);
items.RemoveAt(1);
Assert.Equal(null, target.SelectedItem);
Assert.Equal(-1, target.SelectedIndex);
}
public void Should_Remove_Containers()
{
var items = new AvaloniaList<string>(new[] { "foo", "bar" });
var target = new ItemsPresenter
{
Items = items,
};
target.ApplyTemplate();
items.RemoveAt(0);
Assert.Equal(1, target.Panel.Children.Count);
Assert.Equal("bar", ((ContentPresenter)target.Panel.Children[0]).Content);
Assert.Equal("bar", ((ContentPresenter)target.ItemContainerGenerator.ContainerFromIndex(0)).Content);
}
public void Should_Handle_Duplicate_Items()
{
var items = new AvaloniaList<int>(new[] { 1, 2, 1 });
var target = new ItemsPresenter
{
Items = items,
};
target.ApplyTemplate();
items.RemoveAt(2);
var numbers = target.Panel.Children
.OfType<ContentPresenter>()
.Select(x => x.Content)
.Cast<int>();
Assert.Equal(new[] { 1, 2 }, numbers);
}
public void Should_Handle_Null_Items()
{
var items = new AvaloniaList<string>(new[] { "foo", null, "bar" });
var target = new ItemsPresenter
{
Items = items,
};
target.ApplyTemplate();
var text = target.Panel.Children.Cast<ContentPresenter>().Select(x => x.Content).ToList();
Assert.Equal(new[] { "foo", null, "bar" }, text);
Assert.NotNull(target.ItemContainerGenerator.ContainerFromIndex(0));
Assert.NotNull(target.ItemContainerGenerator.ContainerFromIndex(1));
Assert.NotNull(target.ItemContainerGenerator.ContainerFromIndex(2));
items.RemoveAt(1);
text = target.Panel.Children.Cast<ContentPresenter>().Select(x => x.Content).ToList();
Assert.Equal(new[] { "foo", "bar" }, text);
Assert.NotNull(target.ItemContainerGenerator.ContainerFromIndex(0));
Assert.NotNull(target.ItemContainerGenerator.ContainerFromIndex(1));
}
public void Control_Item_Should_Be_Removed_From_Logical_Children_Before_ApplyTemplate()
{
var target = new ItemsControl();
var child = new Control();
var items = new AvaloniaList<Control>(child);
target.Template = GetTemplate();
target.Items = items;
items.RemoveAt(0);
Assert.Null(child.Parent);
Assert.Null(child.GetLogicalParent());
Assert.Empty(target.GetLogicalChildren());
}