internal static void ApplyDesignerProperties(Control target, Control source)
{
if (source.IsSet(WidthProperty))
target.Width = source.GetValue(WidthProperty);
if (source.IsSet(HeightProperty))
target.Height = source.GetValue(HeightProperty);
if (source.IsSet(DataContextProperty))
target.DataContext = source.GetValue(DataContextProperty);
}
internal static void ApplyDesignerProperties(Control target, Control source)
{
if (source.IsSet(WidthProperty))
{
target.Width = source.GetValue(WidthProperty);
}
if (source.IsSet(HeightProperty))
{
target.Height = source.GetValue(HeightProperty);
}
if (source.IsSet(DataContextProperty))
{
target.DataContext = source.GetValue(DataContextProperty);
}
}
public void DataContext_Binding_Should_Produce_Correct_Results()
{
var viewModel = new { Foo = "bar" };
var root = new Decorator
{
DataContext = viewModel,
};
var child = new Control();
var values = new List <object>();
child.GetObservable(Control.DataContextProperty).Subscribe(x => values.Add(x));
child.Bind(Control.DataContextProperty, new Binding("Foo"));
// When binding to DataContext and the target isn't found, the binding should produce
// null rather than UnsetValue in order to not propagate incorrect DataContexts from
// parent controls while things are being set up. This logic is implemented in
// `Avalonia.Markup.Data.Binding.Initiate`.
Assert.True(child.IsSet(Control.DataContextProperty));
root.Child = child;
Assert.Equal(new[] { null, "bar" }, values);
}
