Re: GTK interface modification

[DJ Stauffer <emacsdev@djstauffer.com>]

On 08/14/2018 03:09 AM, martin rudalics wrote:

 > > What I'd like to do is put a one or two pixel border (of whatever
 > > color I configure, naturally) around the outer edge of the window,
 > > to indicate that the window is selected.
 >
 > It won't be easy.  First you will have to decide whether that border
 > should go away when the window is deselected or you just want to
 > change its appearance.  I'd choose the latter because you only have to
 > redraw the border when a window gets (de-)selected and not the rest of
 > the window.

  ^ Yeah, that's kind of how I figured it would work.

 >
 > Then you have to make sure that the position and size of the window's
 > text area are calculated correctly.  Hence window_text_bottom_y and
 > the window_box functions in xdisp.c have to be modified accordingly.
 >

^ Yeah I figured that I'd be modifying xdisp.c -- I've done a bit of 
that in the past when modifying someone else's patch years ago.

 > And finally you have to actually redraw the border when a window gets
 > (de-)selected, the appropriate moments given by the mode-line code.

^ Is this also in xdisp.c, or is that code elsewhere?

 >
 > BTW, there's no sense to make this GTK specific.  Drawing windows is
 > handled by Emacs itself with some toolkit support for the scroll bars.

^ I was trying to specify that I wanted something to work in the 
graphical version of emacs (and wasn't worried about the terminal 
version, for obvious reasons ) -- since I primarily use the graphical 
version.  I probably should have worded that differently, but the GTK 
version is the only one I ever use, so that's what pops in my head when 
thinking of the graphical version.

Thanks for the help.