[Tickit-dev] Automatic window expose on geometry change

[Paul "LeoNerd" Evans]

I'm writing a C program and once again come upon the annoyance that if
window gets resized, it receives a ..._ON_GEOMCHANGE event but that's
it. No automatic expose. Almost universally I'll just catch that with

  static int expose_on_geomchange(TickitWindow *win,
      TickitEventFlags flags, void *_info, void *data)
  {
    tickit_window_expose(win, NULL);
  }

I wonder if, now we have the winctls for easily setting/fiddling with
configuration params like this, we should add a "expose on geom change"
control to do that for you.

In fact, it could go a little further and more intelligently than that,
offering a choice of

 * No expose
 * Expose entire window
 * Expose just newly-uncovered areas

Also another (possibly-different?) option to control whether to expose
areas newly uncovered due to resized or moved child windows.

For back-compat both options would have to remain "no" at present, but
I suspect they'd save a bit of time and annoyance at "why isn't this
rendering?" by adding those.

Thoughts?

-- 
Paul "LeoNerd" Evans

leonerd at leonerd.org.uk      |  https://metacpan.org/author/PEVANS
http://www.leonerd.org.uk/  |  https://www.tindie.com/stores/leonerd/
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