Re: sheets in GNUstep

[Fred Kiefer]

Am 20.03.2015 um 19:59 schrieb Eric Wasylishen:
> Just to give my 2c: the EWMH spec has window-modal dialogs:
> 
> "_NET_WM_STATE_MODAL indicates that this is a modal dialog box. If the
> WM_TRANSIENT_FOR hint is set to another toplevel window, the dialog is
> modal for that window; if WM_TRANSIENT_FOR is not set or set to the root
> window the dialog is modal for its window group." -
> http://standards.freedesktop.org/wm-spec/wm-spec-1.3.html
> 
> Not sure how widely that is implemented in WM's. But I'd vote for
> keeping sheets as windows in the backend, and passing the information to
> the backend that it is a sheet and which window is the parent.
> 
> There would still need to be emulation of "window-modalness" in gui
> since not all WM's (including win32) will implement it.
> 
> I'm not sure how close this is to what we currently have!

In GNUstep back we already use WM_TRANSIENT_FOR via XSetTransientForHint.

We also define an atom new_wm_state_modal_atom (mistype for
net_wm_state_modal_atom) for _NET_WM_STATE_MODAL, but don't seem to be
using this state. It looks like you added that four years ago, but
didn't get around to put any functionality behind it. I will try to use
this (renamed) feature in orderWindow::: and see how the result behaves
on my KWM. If it isn't worse than before I will commit the change for
others to test.

Fred