public void Clearing_Items_Should_Clear_Selection()
{
var items = new PerspexList<Item>
{
new Item(),
new Item(),
};
var target = new Target
{
Items = items,
Template = this.Template(),
};
target.ApplyTemplate();
target.SelectedIndex = 1;
Assert.Equal(items[1], target.SelectedItem);
Assert.Equal(1, target.SelectedIndex);
target.Items = null;
Assert.Equal(null, target.SelectedItem);
Assert.Equal(-1, target.SelectedIndex);
}
public void Items_Passed_To_Constructor_Should_Appear_In_List()
{
var items = new[] { 1, 2, 3 };
var target = new PerspexList<int>(items);
Assert.Equal(items, target);
}
public void Should_Remove_Containers()
{
var items = new PerspexList<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", ((TextBlock)target.Panel.Children[0]).Text);
}
public void Control_Item_Should_Be_Removed_From_Logical_Children_Before_ApplyTemplate()
{
var target = new ItemsControl();
var child = new Control();
var items = new PerspexList<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 First_Item_Should_Be_Selected_When_Added()
{
var items = new PerspexList<string>();
var target = new TestSelector
{
Items = items,
Template = Template(),
};
target.ApplyTemplate();
items.Add("foo");
Assert.Equal(0, target.SelectedIndex);
Assert.Equal("foo", target.SelectedItem);
}
public void First_Item_Should_Be_Selected_When_Added()
{
var items = new PerspexList<string>();
var target = new SelectingItemsControl
{
AutoSelect = true,
Items = items,
Template = this.Template(),
};
target.ApplyTemplate();
items.Add("foo");
Assert.Equal(0, target.SelectedIndex);
Assert.Equal("foo", target.SelectedItem);
}
public void Item_Should_Be_Selected_When_Selection_Removed()
{
var items = new PerspexList<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 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 Selection_Should_Be_Cleared_When_No_Items_Left()
{
var items = new PerspexList<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 Adding_Items_Should_Raise_CollectionChanged()
{
var target = new PerspexList<int>(new[] { 1, 2 });
var raised = false;
target.CollectionChanged += (s, e) =>
{
Assert.Equal(target, s);
Assert.Equal(NotifyCollectionChangedAction.Add, e.Action);
Assert.Equal(new[] { 3, 4 }, e.NewItems.Cast<int>());
Assert.Equal(2, e.NewStartingIndex);
raised = true;
};
target.AddRange(new[] { 3, 4 });
Assert.True(raised);
}
public void Removing_Items_Should_Fire_LogicalChildren_CollectionChanged()
{
var target = new ItemsControl();
var items = new PerspexList <string> {
"Foo", "Bar"
};
var called = false;
target.Template = GetTemplate();
target.Items = items;
target.ApplyTemplate();
target.Presenter.ApplyTemplate();
((ILogical)target).LogicalChildren.CollectionChanged += (s, e) =>
called = e.Action == NotifyCollectionChangedAction.Remove;
items.Remove("Bar");
Assert.True(called);
}
public void Adding_Selected_Item_Should_Update_Selection()
{
var items = new PerspexList<Item>(new[]
{
new Item(),
new Item(),
});
var target = new SelectingItemsControl
{
Items = items,
Template = this.Template(),
};
target.ApplyTemplate();
items.Add(new Item { IsSelected = true });
Assert.Equal(2, target.SelectedIndex);
Assert.Equal(items[2], target.SelectedItem);
}
public object ConvertFrom(IValueContext context, CultureInfo culture, object value)
{
var result = new PerspexList <T>();
var values = ((string)value).Split(',');
foreach (var s in values)
{
object v;
if (TypeUtilities.TryConvert(typeof(T), s, culture, out v))
{
result.Add((T)v);
}
else
{
throw new InvalidCastException($"Could not convert '{s}' to {typeof(T)}.");
}
}
return(result);
}
public void Adding_Selected_Item_Should_Update_Selection()
{
var items = new PerspexList <Item>(new[]
{
new Item(),
new Item(),
});
var target = new SelectingItemsControl
{
Items = items,
Template = Template(),
};
target.ApplyTemplate();
items.Add(new Item {
IsSelected = true
});
Assert.Equal(2, target.SelectedIndex);
Assert.Equal(items[2], target.SelectedItem);
}
public Node()
{
Children = new PerspexList<Node>();
}
public void Clearing_Items_Should_Raise_CollectionChanged_Remove()
{
var target = new PerspexList<int>(new[] { 1, 2, 3 });
var raised = false;
target.CollectionChanged += (s, e) =>
{
Assert.Equal(target, s);
Assert.Equal(NotifyCollectionChangedAction.Remove, e.Action);
Assert.Equal(new[] { 1, 2, 3 }, e.OldItems.Cast<int>());
Assert.Equal(0, e.OldStartingIndex);
raised = true;
};
target.Clear();
Assert.True(raised);
}
public void RemoveAll_With_Null_Should_Throw_Exception()
{
var target = new PerspexList<int>();
Assert.Throws<ArgumentNullException>(() => target.RemoveAll(null));
}
public void Should_Handle_Null_Items()
{
var items = new PerspexList<string>(new[] { "foo", null, "bar" });
var target = new ItemsPresenter
{
Items = items,
};
target.ApplyTemplate();
var text = target.Panel.Children.Cast<TextBlock>().Select(x => x.Text).ToList();
Assert.Equal(new[] { "foo", "bar" }, text);
Assert.NotNull(target.ItemContainerGenerator.ContainerFromIndex(0));
Assert.Null(target.ItemContainerGenerator.ContainerFromIndex(1));
Assert.NotNull(target.ItemContainerGenerator.ContainerFromIndex(2));
items.RemoveAt(1);
text = target.Panel.Children.Cast<TextBlock>().Select(x => x.Text).ToList();
Assert.Equal(new[] { "foo", "bar" }, text);
Assert.NotNull(target.ItemContainerGenerator.ContainerFromIndex(0));
Assert.NotNull(target.ItemContainerGenerator.ContainerFromIndex(1));
}
public void Should_Handle_Duplicate_Items()
{
var items = new PerspexList<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);
}
/// <summary>
/// Initializes a new instance of the <see cref="Visual"/> class.
/// </summary>
public Visual()
{
this.visualLogger = Log.ForContext(new[]
{
new PropertyEnricher("Area", "Visual"),
new PropertyEnricher("SourceContext", this.GetType()),
new PropertyEnricher("Id", this.GetHashCode()),
});
this.visualChildren = new PerspexList<IVisual>();
this.visualChildren.CollectionChanged += this.VisualChildrenChanged;
}
public void InsertRange_With_Null_Should_Throw_Exception()
{
var target = new PerspexList<int>();
Assert.Throws<ArgumentNullException>(() => target.InsertRange(1, null));
}
public void InsertRange_Past_End_Should_Throw_Exception()
{
var target = new PerspexList<int>();
Assert.Throws<ArgumentOutOfRangeException>(() => target.InsertRange(1, new List<int>() { 1 }));
}
public void Should_Handle_Null_Items()
{
var items = new PerspexList<string>(new[] { "foo", null, "bar" });
var target = new ItemsPresenter
{
Items = items,
};
target.ApplyTemplate();
var text = target.Panel.Children.OfType<TextBlock>().Select(x => x.Text).ToList();
Assert.Equal(new[] { "foo", "bar" }, text);
items.RemoveAt(1);
text = target.Panel.Children.OfType<TextBlock>().Select(x => x.Text).ToList();
Assert.Equal(new[] { "foo", "bar" }, text);
}
public void InsertRange_With_Null_Should_Throw_Exception()
{
var target = new PerspexList <int>();
Assert.Throws <ArgumentNullException>(() => target.InsertRange(1, null));
}
/// <summary>
/// Initializes a new instance of the <see cref="ItemsControl"/> class.
/// </summary>
public ItemsControl()
{
Classes.Add(":empty");
Items = new PerspexList <object>();
}
public void Setting_Items_To_Null_Should_Clear_Selection()
{
var items = new PerspexList<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);
target.Items = null;
Assert.Equal(null, target.SelectedItem);
Assert.Equal(-1, target.SelectedIndex);
}
/// <summary>
/// Initializes a new instance of the <see cref="ItemsControl"/> class.
/// </summary>
public ItemsControl()
{
Classes.Add(":empty");
Items = new PerspexList<object>();
}
public void Removing_Selected_Item_Should_Clear_Selection()
{
var items = new PerspexList<Item>
{
new Item(),
new Item(),
};
var target = new SelectingItemsControl
{
Items = items,
Template = this.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 Node()
{
Children = new PerspexList <Node>();
}
/// <summary>
/// Initializes a new instance of the <see cref="Visual"/> class.
/// </summary>
public Visual()
{
_visualLogger = Log.ForContext(new[]
{
new PropertyEnricher("Area", "Visual"),
new PropertyEnricher("SourceContext", GetType()),
new PropertyEnricher("Id", GetHashCode()),
});
var visualChildren = new PerspexList<IVisual>();
visualChildren.ResetBehavior = ResetBehavior.Remove;
visualChildren.Validate = ValidateLogicalChild;
visualChildren.CollectionChanged += VisualChildrenChanged;
VisualChildren = visualChildren;
}
public void RemoveAll_With_Null_Should_Throw_Exception()
{
var target = new PerspexList <int>();
Assert.Throws <ArgumentNullException>(() => target.RemoveAll(null));
}