On Jul 24, 2008, at 8:29 PM, Seiji Zenitani wrote: > Hi, > > I wrote a transparency code for Cocoa Emacs. > By transparency, I mean the entire-frame transparency, > which is configured by the frame parameter alpha.
Hi, This is good. I assume you looked at the code in nsfns.m: ns_set_background_color()? The method you use ([[view window] setAlphaValue: alpha];) I seem to recall gave nonoptimal results so I only used it under Panther and below. Under Tiger+, it seems [window setBackgroundColor: col] plus [window setOpaque: NO] was sufficient. (To generate a background color from the existing one with a given alpha value, ns_set_alpha() (or ns-set-alpha) or code from there can be used.) For some reason at the time I found it necessary to set the default face background as well. I'm not sure if this is still needed, it seems like a hack. In any case it appears to me the code in that function was not updated when color indexing was added. The line setting face->background should probably be: face->background = ns_index_color([[col colorWithAlphaComponent: alpha]); > ... > On Cocoa Emacs, the attached code works fine > for active frames (frontmost frame), but > I cannot set transparency of inactive frames. Probably a redraw needs to be triggered. Whether just within the NS layer ([window display]) or, more drastically, as ns_set_background_color() does now: if (FRAME_VISIBLE_P (f)) redraw_frame (f); I'm not sure. The window server caches window content so I'd think just display would be enough, but then again I used the drastic method for SOME reason... thanks, Adrian ------------------------------------------------------------------------- This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK & win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100&url=/ _______________________________________________ Emacs-app-dev- mailing list Emacs-app-dev-@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emacs-app-dev-
