private static unsafe int Do_Abi_add_CanExecuteChanged_0(IntPtr thisPtr, IntPtr handler, out global::WinRT.EventRegistrationToken token)
{
token = default;
try
{
var __this = global::WinRT.ComWrappersSupport.FindObject <global::System.Windows.Input.ICommand>(thisPtr);
var __handler = CanExecuteChangedEventHandler.FromAbi(handler);
token = _CanExecuteChanged_TokenTables.GetOrCreateValue(__this).AddEventHandler(__handler);
__this.CanExecuteChanged += __handler;
return(0);
}
catch (global::System.Exception __ex)
{
return(__ex.HResult);
}
}
void OnCommandChanged(DependencyPropertyChangedEventArgs e)
{
var oldValue = e.OldValue as ICommand;
var newValue = e.NewValue as ICommand;
if (oldValue != null && commandCanExecuteChangedHandler != null)
{
oldValue.CanExecuteChanged -= commandCanExecuteChangedHandler.Handler;
commandCanExecuteChangedHandler = null;
}
if (newValue != null)
{
commandCanExecuteChangedHandler = new CanExecuteChangedEventHandler <CommandItem>(this, (owner, o, ee) => owner.OnCommandCanExecuteChanged(o, ee));
newValue.CanExecuteChanged += commandCanExecuteChangedHandler.Handler;
}
UpdateCanExecute();
}
protected override IntPtr GetAbi(IObjectReference marshaler) => marshaler is null ? IntPtr.Zero : CanExecuteChangedEventHandler.GetAbi(marshaler);
protected override void DisposeMarshaler(IObjectReference marshaler) => CanExecuteChangedEventHandler.DisposeMarshaler(marshaler);
protected override IObjectReference CreateMarshaler(EventHandler del) => del is null ? null : CanExecuteChangedEventHandler.CreateMarshaler(del);
public CommandItem()
{
this.commandCanExecuteChangedHandler = new CanExecuteChangedEventHandler <CommandItem>(this, (owner, o, e) => owner.OnCommandCanExecuteChanged(o, e));
}
