public bool CanExecute(GestureData data)
{
if (data == null)
{
throw new ArgumentNullException("data");
}
if (data.Context == null)
{
throw new ArgumentException(Resources.Error_MissingContext);
}
ToolCommandBinding commandBinding = this.GetCommandBinding(data);
if (commandBinding == null)
{
return(false);
}
CanExecuteToolEventArgs e = new CanExecuteToolEventArgs((ICommand)this, (object)data);
return(commandBinding.OnCanExecute(data.Context, e));
}
private ToolCommandBinding GetCommandBinding(GestureData data)
{
return(data.Context.Items.GetValue <Tool>().GetToolCommandBinding((ICommand)this, data));
}
private void OnUnionSelectObject(object sender, ExecutedToolEventArgs e)
{
Performance.StartTiming(PerformanceMarks.SelectionChange);
SelectionOperations.Union(this.Context, GestureData.FromEventArgs(e).ImpliedSource);
Performance.StopTiming(PerformanceMarks.SelectionChange);
}