/// <summary>
/// occurs when the command change on a <see cref="DependencyObject"/>
/// </summary>
/// <param name="d">The dependency object.</param>
/// <param name="e">The <see cref="System.Windows.DependencyPropertyChangedEventArgs"/> instance containing the event data.</param>
private static void CommandChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
if (d is UIElement)
{
var elem = (UIElement)d;
CommandSubscription.UnregisterSubscription(e.OldValue as string, elem);
CommandSubscription.RegisterCommand(e.NewValue as string, elem);
}
}
/// <summary>
/// Registers the command.
/// </summary>
/// <param name="commandName">The command name.</param>
/// <param name="element">The element.</param>
internal static void RegisterCommand(string commandName, UIElement element)
{
var subscription = new CommandSubscription(element, commandName);
Dictionary <string, CommandSubscription> elementSubscriptions;
if (!subscriptions.TryGetValue(element, out elementSubscriptions))
{
elementSubscriptions = new Dictionary <string, CommandSubscription>();
subscriptions.Add(element, elementSubscriptions);
}
Command cmd = CommandService.FindCommand(commandName);
if (cmd != null)
{
if (element is ButtonBase)
{
((ButtonBase)element).Click += subscription.CommandService_Click;
}
else if (element is TextBox)
{
(element).KeyDown += subscription.CommandService_KeyDown;
}
else
{
element.MouseLeftButtonUp += subscription.CommandService_Click;
}
var fe = element as FrameworkElement;
if (fe != null)
{
fe.LayoutUpdated += subscription.LayoutUpdated;
}
}
elementSubscriptions[commandName] = subscription;
}