public void CanResetLayoutAfterUniqueIdReset()
{
var data = new WinRTCollection(Enumerable.Range(0, 2).Select(i => string.Format("Item #{0}", i)));
object dataSource = null;
RunOnUIThread.Execute(() => dataSource = MockItemsSource.CreateDataSource(data, supportsUniqueIds: true));
ItemsRepeater repeater = SetupRepeater(dataSource);
RunOnUIThread.Execute(() =>
{
var range = new UIElement[] { repeater.TryGetElement(0), repeater.TryGetElement(1) };
var clearedElements = new List <UIElement>();
repeater.ElementClearing += (s, e) =>
{
clearedElements.Add(e.Element);
};
// The realized elements will be sent to the unique id reset pool.
// They haven't been cleared yet.
data.Reset();
Verify.AreEqual(0, clearedElements.Count);
// This also cause elements to be sent to the unique id reset pool.
// We are validating here that we are smart enough not send them there twice.
// Doing so will cause an exception to be thrown.
repeater.Layout = null;
Verify.AreEqual(0, clearedElements.Count);
repeater.UpdateLayout();
// Layout runs. The elements in the reset pool are not used.
// They should be cleared back to the view generator at this point.
Verify.AreEqual(2, clearedElements.Count);
Verify.AreEqual(range[0], clearedElements[0]);
Verify.AreEqual(range[1], clearedElements[1]);
Verify.IsNull(repeater.TryGetElement(0));
Verify.IsNull(repeater.TryGetElement(1));
});
}
public void CanChangeFocusAfterUniqueIdReset()
{
var data = new WinRTCollection(Enumerable.Range(0, 2).Select(i => string.Format("Item #{0}", i)));
object dataSource = null;
RunOnUIThread.Execute(() => dataSource = MockItemsSource.CreateDataSource(data, supportsUniqueIds: true));
ItemsRepeater repeater = SetupRepeater(dataSource);
Control focusedElement = null;
RunOnUIThread.Execute(() =>
{
focusedElement = (Control)repeater.TryGetElement(0);
focusedElement.Focus();
});
IdleSynchronizer.Wait();
RunOnUIThread.Execute(() =>
{
data.Reset();
});
IdleSynchronizer.Wait();
RunOnUIThread.Execute(() =>
{
// Still focused.
Verify.AreEqual(focusedElement, Keyboard.FocusedElement);
// Change focused element.
focusedElement = (Control)repeater.TryGetElement(1);
focusedElement.Focus();
});
IdleSynchronizer.Wait();
RunOnUIThread.Execute(() =>
{
// Focus is on the new element.
Verify.AreEqual(focusedElement, Keyboard.FocusedElement);
});
}