/// <summary>
/// Called when the target changes. If the TargetName property isn't set, this action has custom behavior.
/// </summary>
/// <param name="oldTarget"></param>
/// <param name="newTarget"></param>
/// <exception cref="InvalidOperationException">Could not locate an appropriate FrameworkElement with states.</exception>
protected override void OnTargetChanged(FrameworkElement oldTarget, FrameworkElement newTarget)
{
base.OnTargetChanged(oldTarget, newTarget);
FrameworkElement frameworkElement = null;
if (string.IsNullOrEmpty(this.TargetName) && !this.IsTargetObjectSet)
{
VisualStateUtilities.TryFindNearestStatefulControl(this.AssociatedObject as FrameworkElement, out frameworkElement);
}
else
{
frameworkElement = this.Target;
}
this.StateTarget = frameworkElement;
}
/// <summary>
/// Called when the target changes. If the TargetName property isn't set, this action has custom behavior.
/// </summary>
/// <param name="oldTarget"></param>
/// <param name="newTarget"></param>
/// <exception cref="InvalidOperationException">Could not locate an appropriate FrameworkElement with states.</exception>
protected override void OnTargetChanged(FrameworkElement oldTarget, FrameworkElement newTarget)
{
base.OnTargetChanged(oldTarget, newTarget);
FrameworkElement frameworkElement = null;
if (string.IsNullOrEmpty(this.TargetName) && !this.IsTargetObjectSet)
{
bool successful = VisualStateUtilities.TryFindNearestStatefulControl(this.AssociatedObject as FrameworkElement, out frameworkElement);
if (!successful && frameworkElement != null)
{
throw new InvalidOperationException();
}
}
else
{
frameworkElement = this.Target;
}
this.StateTarget = frameworkElement;
}