void wxBookCtrlBase::OnHelp(wxHelpEvent& event)
{
// determine where does this even originate from to avoid redirecting it
// back to the page which generated it (resulting in an infinite loop)
// notice that we have to check in the hard(er) way instead of just testing
// if the event object == this because the book control can have other
// subcontrols inside it (e.g. wxSpinButton in case of a notebook in wxUniv)
wxWindow *source = wxStaticCast(event.GetEventObject(), wxWindow);
while ( source && source != this && source->GetParent() != this )
{
source = source->GetParent();
}
if ( source && m_pages.Index(source) == wxNOT_FOUND )
{
// this event is for the book control itself, redirect it to the
// corresponding page
wxWindow *page = NULL;
if ( event.GetOrigin() == wxHelpEvent::Origin_HelpButton )
{
// show help for the page under the mouse
const int pagePos = HitTest(ScreenToClient(event.GetPosition()));
if ( pagePos != wxNOT_FOUND)
{
page = GetPage((size_t)pagePos);
}
}
else // event from keyboard or unknown source
{
// otherwise show the current page help
page = GetCurrentPage();
}
if ( page )
{
// change event object to the page to avoid infinite recursion if
// we get this event ourselves if the page doesn't handle it
event.SetEventObject(page);
if ( page->GetEventHandler()->ProcessEvent(event) )
{
// don't call event.Skip()
return;
}
}
}
//else: event coming from one of our pages already
event.Skip();
}
