Re: Add function to make frame topmost?

[David De La Harpe Golden <david@harpegolden.net>]

On 03/05/10 10:59, Lennart Borgman wrote:


> Yes, but does not that mean that it should start as a topmost window?
>

[I prefer always-on-top terminologically: It is very easy for a non-w32 
person to read (or write) topmost as "start as the instantaneously top 
window [in the window's current stack layer]", i.e. raised, the 
equivalent of w32 HWND_TOP, rather than "start as a window in the 
always-on-top stack layer", the w32 HWND_TOPMOST.]

> On the other hand if using Growl (as David De La Harpe Golden
> suggested) then you have this capabilities there already I believe.

While adding stacking-layer, override-redirect, disposition/type-hint, 
transient-for, no-decorations and more as elisp-exposed emacs frame 
parameters is obviously technically possible on x11 (well, some might 
only be settable at make-frame time and then read-only), I expect most 
users on x11 would prefer apps wanting to do bubble notifications use 
the relevant service, and I thought growl might be a close analogue 
available on w32/macosx.

IMO the notification popper-upper daemon is a special case that can "get 
away with" doing certain things rather than an example for emacs to 
follow, but I did go digging into current x11 practice for the 
notification daemon's windows - in the interests of full disclosure: 
gnome-notification-daemon and xfce4-notifyd both use windows of 
_TYPE_NOTIFICATION [1][2], but the former also makes it an override 
redirect window [3] and the latter a _STATE_ABOVE window [4] with no 
decorations (_MOTIF_WM_HINTS).

[1] 
http://git.xfce.org/apps/xfce4-notifyd/tree/xfce4-notifyd/xfce-notify-window.c#n224
[2] 
http://git.gnome.org/browse/notification-daemon/tree/src/themes/standard/theme.c#n611
[3] 
http://git.gnome.org/browse/notification-daemon/tree/src/themes/standard/theme.c#n596
[4] 
http://git.xfce.org/apps/xfce4-notifyd/tree/xfce4-notifyd/xfce-notify-window.c#n217