On Thu, 30 Mar 2000, Chris Peterson wrote:
> I really don't know anything about X, so take what I'm proposing with a
> grain of salt, but I'm wondering if there would be a way to make it work.
>
> Could the application make an exact copy of the root window and have all
> other apps treat this as the root window. Then, couldn't you intercept
> anything coming from the window manager and decide what to do with it before
> it gets sent onto the running applications?
>
That's what the GNOME hint option is suposed to do :) The hint
tells the window manager to send clicks in the root window to
the application that requested it.
--
Alfredo
> just a thought,
> Chris
> ----- Original Message -----
> From: Alfredo Kengi Kojima <kojima@xxxxxxxxxxxx>
> To: blinux developers <blinux-develop@xxxxxxxxxx>
> Sent: Thursday, March 30, 2000 12:22 PM
> Subject: Re: Tracking Events On Another Window
>
>
> On Tue, 16 Feb 1999, Kieran O' Sullivan wrote:
>
> It's only allowed for a single application to select for
> buttonpress events in a window. In the case of the root
> window, the window manager already does that before any
> app, so you can't do what you want directly. The options
> are:
> 1) disable root window button press in the window manager,
> if it's possible (some window managers have an option for that)
> 2) do a passive grab for button presses in the root window
> (XGrabButton)
> 3) use an existing window manager protocol to tell the
> window manager to relay button events to your app (take a
> look in teh GNOME wm hints)
> 4) rethink whether you really need button events from the
> root window
>
> --
> Alfredo
>
> > I was on about this befor and I tried the suggestion that I got back and
> > some of it was good but SelectInput() causes errors when it is applied to
> > the root window. The root window seems to think that you are trying to
> > change its assributes so your program crashes. The following was
> > something I came up with and for some reason it doesn't work the program
> > can process its own events but it gets nothing from the root window. I
> > have not tried the function with any other window and I know that the root
> > window is listening to ButtonPress events.
> >
> > root_win = RootWindow(display, root_screen); /* Sets a window structure
> > equal to root window. There is nothing wrong with this statement because
> > I have used it in a QueryTre() function successfully */
> >
> > /* there is a continuous loop here */
> > /* after the program has processed its own events it does the following */
> >
> > if(!XCheckWindowEvent(display, root_win,
> ButtonPressMask|PointerMotionMask, &report2))
> >
> > {/* nothing to do because there are no events */}
> > /* XCheckWindowEvent() is used because it checks the event que and
> > if it doesn't find anything it returns False and doesn't balck allowing
> > the program to do what it has to do with out waiting for events. */
> >
> > else
> >
> > {
> >
> > printf("\n Something happended ont the root window \n");
> >
> > switch (report2.type)
> >
> >
>
> > case ButtonPress:
> >
> > printf("\nButton Press on root window \n");
> >
> > break;
> >
> >
> > case MotionNotify:
> >
> > XQueryPointer (display, win, &rep_root, &rep_child,
> >
> > &rep_rootx, &rep_rooty, &dx, &dy, &rep_mask);
> >
> > printf("\nThe pointer was queried %d, %d\n",dx, dy);
> >
> > break;
> >
> > default:
> >
> > break;
> >
> > } /* End of case for report2 */
> >
> > } /* Enf of if */
> >
> > } /* End of While loop that processes all the events */
> >
> > If anyone can help I would be very grateful.
> >
> > _____________________________________________________________________
> > Kieran O' Sullivan
> > http://snet.wit.ie/BlindPenguin
> >
> >
> > --
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> > "unsubscribe" as the Subject.
> >
> >
>
>
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