David Nečas wrote:
On Sun, Dec 27, 2009 at 11:23:46PM +0000, Andy Spencer wrote:
Here is a sample program that reflects the issues I'm having:
http://en.pastebin.ca/1728846
I tried trimming down your example to see if I could find anything that
might have been causing problems, but no luck. Here's the trimmed down
version I came up with:
http://vpaste.net/0si1W?s
And you actually observe several seconds long lags during scrolling with
this sample program?
Well, I am not able to reproduce it -- on a notebook. The scolling
indeed lags behind a bit which is observable especially if I maximize
the window, but that's all.
I wonder what causes the difference.
Yeti
Thanks Andy for that version. Its a different program (Styling,
Callbacks etc...) but nonetheless, functionally similar. And it runs
MUCH faster than my version.
I went through my code commenting/uncommenting pieces until I got it as
fast as Andy's version. There were many small things that gave me a few
percent speed increase, but the big boost came from the absence of
"gtk_tree_view_set_grid_lines". With this setting included, like I said
earlier, I get several seconds delay between the mouse scroll wheel and
the GtkTreeView, however with this setting removed, the delay is only a
few milliseconds.
I tried various combinations of styling settings and can confirm that on
my machine the absence of _grid_lines translates to a 10x speed increase
in scrolling responsiveness on GtkTreeView.
Having said that, its still no way near as fast as QTreeView. But at
least now someone who knows the GTK+ internals can look into
_grid_lines. and narrow down the problem.
Thanks guys.
Vik.
_______________________________________________
gtk-list mailing list
gtk-list@xxxxxxxxx
http://mail.gnome.org/mailman/listinfo/gtk-list
