/// <summary>
/// Transitions the control between two states.
/// </summary>
/// <param name="control">The <see cref="Windows.UI.Xaml.Controls.Control"/> to transition between states.</param>
/// <param name="stateName">The state to transition to.</param>
/// <param name="useTransitions">True to use a <see cref="Windows.UI.Xaml.VisualTransition"/> to transition between states; otherwise, false.</param>
/// <returns>True if the <paramref name="control"/> is successfully transitioned to the new state; otherwise, false.</returns>
/// <exception cref="System.ArgumentNullException"><paramref name="control"/> or <paramref name="stateName"/> is null.</exception>
public static bool GoToState(Control control, string stateName, bool useTransitions)
{
if (control == null)
{
throw new ArgumentNullException("control");
}
if (string.IsNullOrEmpty(stateName))
{
throw new ArgumentNullException("stateName");
}
control.ApplyTemplate();
return VisualStateManager.GoToState(control, stateName, useTransitions);
}
VisualStateCache PseudoDisable(Control control)
{
if (VisualTreeHelper.GetChildrenCount(control) == 0)
control.ApplyTemplate();
VisualStateManager.GoToState(control, "Disabled", true);
var rootElement = (FrameworkElement)VisualTreeHelper.GetChild(control, 0);
var cache = new VisualStateCache();
IList<VisualStateGroup> groups = VisualStateManager.GetVisualStateGroups(rootElement);
VisualStateGroup common = null;
foreach (var group in groups)
{
if (group.Name == "CommonStates")
common = group;
else if (group.Name == "FocusStates")
cache.FocusStates = group;
else if (cache.FocusStates != null && common != null)
break;
}
if (cache.FocusStates != null)
groups.Remove(cache.FocusStates);
if (common != null)
{
foreach (VisualState state in common.States)
{
if (state.Name == "Normal")
cache.Normal = state;
else if (state.Name == "Pressed")
cache.Pressed = state;
else if (state.Name == "PointerOver")
cache.PointerOver = state;
}
if (cache.Normal != null)
common.States.Remove(cache.Normal);
if (cache.Pressed != null)
common.States.Remove(cache.Pressed);
if (cache.PointerOver != null)
common.States.Remove(cache.PointerOver);
}
return cache;
}
