[Interest] Multiple windows app modal?

[Alex Malyushytskyy]

I believe your case is outside of the normal usage pattern of modal
windows/dialogs.
Remember you can always disable any window at any time and leave only
desired windows accessible to user.

Alex

On Mon, Mar 4, 2013 at 5:06 PM, John Weeks <john at wavemetrics.com> wrote:
> I have a need to make a group of windows behave in an app modal fashion,
> while being mutually non-modal. That is, the GUI in each of this group of
> windows is still responsive, but nothing should be allow in windows that
> aren't part of this group.
>
> I'm part of the way there by running a private event loop and event filter.
> The event filter blocks events for windows that aren't in the group (returns
> true for those events) and allows them (returns false) if the target window
> is one of the windows in the group.
>
> But there is (at least) one flaw- other windows can be activated. That is,
> they appear activated, but since I'm blocking any mouse and key events, they
> don't do anything.
>
> I'm wondering how Qt achieves the high-quality window modality that they use
> for a dialog. Or is it just that window modality is something that both
> Windows and Mac provide as an OS service, but what I want is not?
>
> Thanks to all!
>
> -John
>
> An "IgorWindow" is a class w use to encapsulate the parts of a window that
> are special to our application.
>
>  bool PauseForUserObject::eventFilter(QObject *watched, QEvent *event)
> {
> Q_UNUSED(watched);
> bool result = false; // means "don't block this event"
>
> // This seems fragile. I have gone through the event type definition in
> qcoreevent.h and I am blocking
> // all the events that sound like GUI interaction events.
> if (event->type() == QEvent::MouseButtonPress ||
> event->type() == QEvent::MouseButtonRelease ||
> event->type() == QEvent::MouseMove ||
> event->type() == QEvent::KeyPress ||
> event->type() == QEvent::KeyRelease ||
> event->type() == QEvent::Wheel ||
> event->type() == QEvent::DragEnter ||
> event->type() == QEvent::DragMove ||
> event->type() == QEvent::DragLeave ||
> event->type() == QEvent::Drop ||
> event->type() == QEvent::DragResponse)
> {
> IgorWindow * watchedWindow = IgorWindowFromQObject(watched);
> if (watchedWindow == NULL)
> result = true; // block it
> else
> {
> result = !_windowIsRelatedToInterestingWindow(watchedWindow);
> }
> }
>
> if (event->type() == QEvent::Paint)
> result = false; // allow paint events for any window.
>
> if (event->type() == QEvent::ContextMenu ||
> event->type() == QEvent::MouseButtonDblClick ||
> event->type() == QEvent::InputMethod ||
> event->type() == QEvent::TabletMove ||
> event->type() == QEvent::TabletPress ||
> event->type() == QEvent::TabletRelease ||
> event->type() == QEvent::OkRequest ||
> event->type() == QEvent::HelpRequest ||
> event->type() == QEvent::IconDrag ||
> event->type() == QEvent::Shortcut ||
> event->type() == QEvent::ShortcutOverride ||
> event->type() == QEvent::WhatsThisClicked ||
> event->type() == QEvent::EnterWhatsThisMode ||
> event->type() == QEvent::LeaveWhatsThisMode ||
> event->type() == QEvent::HoverEnter ||
> event->type() == QEvent::HoverLeave ||
> event->type() == QEvent::HoverMove ||
> event->type() == QEvent::NonClientAreaMouseMove ||
> event->type() == QEvent::NonClientAreaMouseButtonPress ||
> event->type() == QEvent::NonClientAreaMouseButtonRelease ||
> event->type() == QEvent::NonClientAreaMouseButtonDblClick ||
> event->type() == QEvent::GrabMouse ||
> event->type() == QEvent::UngrabMouse ||
> event->type() == QEvent::GrabKeyboard ||
> event->type() == QEvent::UngrabKeyboard ||
> event->type() == QEvent::TouchBegin ||
> event->type() == QEvent::TouchUpdate ||
> event->type() == QEvent::TouchEnd
>   )
> {
> result = true; // block this event
> }
>
> return result; // this block EVERYTHING
> }
>
>
>
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