C++ (Cpp) TDocument::QueryViews Examples

Example #1

File: document.cpp Project: Darkman-M59/Meridian59_115

//
/// Queries the views of the current document and the views of any child documents
/// about a specified event, but stops at the first view that returns true. In
/// contrast to NotifyViews(), QueryViews returns a pointer to the first view that
/// responded to an event with a true result. The event, EV_OWLNOTIFY, is sent with
/// an event code (which is private to the particular document and view class) and a
/// long argument (which can be cast appropriately to the actual type passed in the
/// argument of the response function).
//
TView*
TDocument::QueryViews(int event, long item, TView* exclude)
{
  TView* view;
  TDocument* pdoc = 0;
  while ((pdoc = ChildDoc.Next(pdoc)) != 0)
    if ((view = pdoc->QueryViews(event, item, exclude)) != 0)
      return view;

  TEventHandler::TEventInfo eventInfo(WM_OWLNOTIFY, event);
  for (view = ViewList; view != 0; view = view->NextView) {
    if (view != exclude) {
      if (view->Find(eventInfo)) {
        if (view->Dispatch(eventInfo, 0, item)) {
          return view;            // Return first acknowledger
        }
      }
    }
  }
  return 0;
}