/// <summary>
/// Raises the closing event. Gives event subscriber a chance to prevent the dialog from closing, based on the
/// current state of the application and the button used to commit. Note that we don't have full access at
/// this stage to the full dialog state.
/// </summary>
/// <param name="id">The id for the <c>TaskDialog</c>.</param>
/// <returns>An integer.</returns>
internal int RaiseClosingEvent(int id)
{
EventHandler <TaskDialogClosingEventArgs> handler = Closing;
if (handler != null)
{
var e = new TaskDialogClosingEventArgs();
// Try to identify the button - is it a standard one?
TaskDialogStandardButtons buttonClicked = MapButtonIdToStandardButton(id);
// If not, it had better be a custom button...
if (buttonClicked == TaskDialogStandardButtons.None)
{
TaskDialogButtonBase customButton = GetButtonForId(id);
// ... or we have a problem.
if (customButton == null)
{
throw new InvalidOperationException(Resources.TaskDialogBadButtonId);
}
e.CustomButton = customButton.Name;
e.TaskDialogResult = TaskDialogResult.CustomButtonClicked;
}
else
{
e.TaskDialogResult = (TaskDialogResult)buttonClicked;
}
// Raise the event and determine how to proceed.
handler(this, e);
if (e.Cancel)
{
return((int)Result.False);
}
}
// It's okay to let the dialog close.
return((int)Result.Ok);
}