Re: GtkTreeView and fixed_height mode
On Wed, Feb 07, 2007 at 03:37:07PM +0100, Emmanuel Briot wrote: I do agree with your analysis that the other modes do not make sense, but if things work anyway shouldn't it just be documented that best practice recommend using fixed width mode, but have the code not enforce it ? Maybe, I am not really sure about that. Fixed height mode is really limited and we have always discouraged to use it. However, for really large data sets there is not really another option. Are there any other limitations that not having things resize automatically ? Not that I know of, but of course from the name it is clear that all rows in the tree view will be forced to have the same height. It is not possible to have both rows with a single line of text and multiple lines of text, etc, etc. regards, -kris. ___ gtk-devel-list mailing list gtk-devel-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-devel-list
Re: GtkTreeView and fixed_height mode
On Wed, Feb 07, 2007 at 10:06:13AM -0500, Morten Welinder wrote: You would measure cells only as they become visible and adjust the width of the columns as needed. That would probably mean that the columns will be busy resizing as you are scrolling. I am not sure if that is really nice ... regards, -kris. ___ gtk-devel-list mailing list gtk-devel-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-devel-list
Re: GtkTreeView and fixed_height mode
Morten Welinder [EMAIL PROTECTED] writes: That depends on the data and how much we have seen before, but if we initially did a fair-sized sample -- last I looked we were doing 1000 rows -- then the probability is low and hence it is not annoying. If you did that, then you could also completely avoid having the fixed-height mode by estimating the total height based on the initial sampling, then adjusting the scrollbar as needed. If the distribution of heights is reasonable, then the initial guess will be close to the correct one. In the common case where all rows have the same size, the initial guess would be exact. This is particularly appealing since programmers in general don't have the information to answer the question is this tree fixed height, because the answer depends on what fonts are installed and what text is actually in the tree. Soren ___ gtk-devel-list mailing list gtk-devel-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-devel-list
Re: GtkTreeView and fixed_height mode
On Wed, Feb 07, 2007 at 12:58:18PM +0100, Emmanuel Briot wrote: The assertion above checks that all columns are also using a fixed sizing. The comment doesn't really indicate *why* this was necessary though, and that is change compared to older versions of gtk+ 2.4. Note that this change has been in gtktreeview.c since the first fixed_height_mode commit. The requirement for FIXED columns in fixed height mode has been in there since 2.3.x and has not changed over time. I suppose changing their code to using fixed sizing for columns is doable, but what would they lose by doing that (is manual resizing an orthogonal issue for instance ?) Which other resizing mode would you want to use for your column? AUTOSIZE doesn't make any sense, the point of fixed height mode is to speed up GtkTreeView by not measuring every row. Widths of cells will also not be measured, so GtkTreeView cannot auto size columns in this case. Then there is GROW_ONLY; as cells are not remeasured on model changes, using this mode does not make much sense either. The only one left is FIXED. GtkTreeView usually defaults to the size of the column headers (determined by the length of the column titles) for this. You can also set a good size yourself. And the user is still able to resize columns when you enable the resizable properties of the columns. Fixed height mode is really limited and we have always discouraged to use it. However, for really large data sets there is not really another option. I hope this clears things up a bit. regards, -kris. ___ gtk-devel-list mailing list gtk-devel-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-devel-list
Re: GtkTreeView and fixed_height mode
Which other resizing mode would you want to use for your column? AUTOSIZE doesn't make any sense, the point of fixed height mode is to speed up GtkTreeView by not measuring every row. AUTOSIZE. Or maybe GROW_ONLY. You would measure cells only as they become visible and adjust the width of the columns as needed. Morten ___ gtk-devel-list mailing list gtk-devel-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-devel-list
