protected override void OnEvent(EventArgs eventArgs)
{
if (this.Command == null)
{
return;
}
CommandActionExParameter param = new CommandActionExParameter();
param.Parameter1 = CommandParameter1;
param.Parameter2 = CommandParameter2;
param.Parameter3 = CommandParameter3;
if (PassEventArgsToCommand)
{
param.EventArgs = eventArgs;
}
if (PassEventSenderToCommand)
{
param.EventSender = this.Source;
}
if (PassRoutEventArgsToCommand)
{
param.RoutedEventArgs = eventArgs as RoutedEventArgs;
}
if (this.Command.CanExecute(param))
{
this.Command.Execute(param);
}
}
protected override void Invoke(object parameter)
{
if (this.Command == null)
{
return;
}
CommandActionExParameter param = new CommandActionExParameter();
param.Parameter1 = CommandParameter1;
param.Parameter2 = CommandParameter2;
param.Parameter3 = CommandParameter3;
if (PassEventSenderToCommand)
{
param.EventSender = this.AssociatedObject;
}
if (PassEventArgsToCommand)
{
param.EventArgs = parameter as EventArgs;
}
if (PassRoutEventArgsToCommand)
{
param.RoutedEventArgs = parameter as RoutedEventArgs;
}
if (this.Command.CanExecute(param))
{
this.Command.Execute(param);
}
}
private void Command_CanExecuteChanged(object sender, EventArgs e)
{
UIElement element = this.Source as UIElement;
if (element != null)
{
CommandActionExParameter param = new CommandActionExParameter();
param.Parameter1 = CommandParameter1;
param.Parameter2 = CommandParameter2;
param.Parameter3 = CommandParameter3;
element.IsEnabled = this.Command.CanExecute(param);
}
}
protected override void OnAttached()
{
base.OnAttached();
if (this.Command != null)
{
UIElement element = this.Source as UIElement;
if (element != null)
{
CommandActionExParameter param = new CommandActionExParameter();
param.Parameter1 = CommandParameter1;
param.Parameter2 = CommandParameter2;
param.Parameter3 = CommandParameter3;
element.IsEnabled = this.Command.CanExecute(param);
this.Command.CanExecuteChanged += Command_CanExecuteChanged;
}
}
}
private static void CommandParameter3ChangedCallback(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
var invokeCommand = d as EventToCommandEx;
if (invokeCommand != null)
{
invokeCommand.SetValue(CommandParameter3Property, e.NewValue);
}
UIElement element = invokeCommand.Source as UIElement;
if (element != null)
{
CommandActionExParameter param = new CommandActionExParameter();
param.Parameter1 = invokeCommand.CommandParameter1;
param.Parameter2 = invokeCommand.CommandParameter2;
param.Parameter3 = invokeCommand.CommandParameter3;
element.IsEnabled = invokeCommand.Command.CanExecute(param);
}
}
