tree view column sizing problem
I have a tree view with 3 columns, which sits within a scrolled window. The middle column contains what can be quite a lengthy string. When the user opens the window in question, I'd like her to be visually aware that the third column is there: the problem is that with the columns autosized, the length of the middle string can push the third column out of the visible zone (you have to scroll horizontally to reach it). The ideal solution, I think, would be (a) set the starting width of the middle column to some reasonable maximum (when the window is first opened), but then (b) allow the user to expand it to read the full string if need be. I can achieve (a) using gtk_tree_view_column_set_max_width() with a suitable second argument, but how to achieve (b)? I have tried calling gtk_tree_view_column_set_max_width() with a second argument of -1 once the tree view is realized, but this results in the column immediately being autosized, making (a) useless. I guess what I'm looking for is gtk_tree_view_column_set_width() without the "max". That function doesn't exist, but is there a way of doing it? Thanks for any suggestions. -- Allin Cottrell Department of Economics Wake Forest University, NC ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
Re: tree view column sizing problem
Allin Cottrell wrote: > I have a tree view with 3 columns, which sits within a scrolled > window. > > The middle column contains what can be quite a lengthy string. > When the user opens the window in question, I'd like her to be > visually aware that the third column is there: the problem is that > with the columns autosized, the length of the middle string can > push the third column out of the visible zone (you have to scroll > horizontally to reach it). I presume you can't just swap the second and third columns? > The ideal solution, I think, would be (a) set the starting width > of the middle column to some reasonable maximum (when the window > is first opened), but then (b) allow the user to expand it to read > the full string if need be. If the user can be satisfied with seeing one complete string at a time, another option is to add a full-width label widget at the bottom of the window showing the content of the second column of the currently selected row. That avoids the need for the user to resize anything. Or add tooltips to the column. Cheers, Dave ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
Re: tree view column sizing problem
On Tue, 28 Aug 2007, Dave Howorth wrote: > Allin Cottrell wrote: > > I have a tree view with 3 columns, which sits within a scrolled > > window. > > > > The middle column contains what can be quite a lengthy string. > > When the user opens the window in question, I'd like her to be > > visually aware that the third column is there: the problem is that > > with the columns autosized, the length of the middle string can > > push the third column out of the visible zone (you have to scroll > > horizontally to reach it). > > I presume you can't just swap the second and third columns? Thet crossed my mind, but it's not ideal. The third column contains what's in a sense secondary information. > > The ideal solution, I think, would be (a) set the starting width > > of the middle column to some reasonable maximum (when the window > > is first opened), but then (b) allow the user to expand it to read > > the full string if need be. > > If the user can be satisfied with seeing one complete string at a time, > another option is to add a full-width label widget at the bottom of the > window showing the content of the second column of the currently > selected row. That avoids the need for the user to resize anything. > > Or add tooltips to the column. Thanks, tooltips might be a good way to go -- though it looks as if adding tips to a treeview cell is not trivial! Allin Cottrell ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
Re: tree view column sizing problem
Just for the record, if anyone else hits this.
> I wrote:
> > I have a tree view with 3 columns, which sits within a scrolled
> > window.
> >
> > The middle column contains what can be quite a lengthy string.
> > When the user opens the window in question, I'd like her to be
> > visually aware that the third column is there: the problem is that
> > with the columns autosized, the length of the middle string can
> > push the third column out of the visible zone (you have to scroll
> > horizontally to reach it).
>
> > The ideal solution, I think, would be (a) set the starting width
> > of the middle column to some reasonable maximum (when the window
> > is first opened), but then (b) allow the user to expand it to read
> > the full string if need be.
Dave Howorth responded:
> If the user can be satisfied with seeing one complete string at a time,
> another option is to add a full-width label widget at the bottom of the
> window showing the content of the second column of the currently
> selected row. That avoids the need for the user to resize anything.
>
> Or add tooltips to the column.
I tried tooltips (well, a hand-rolled tooltip using gtk_window,
since the current gtk tooltips API doesn't work with treeview
cells), but it was a lot of work, and didn't really cut it.
For example, if the user maximizes the window on a big screen, we
_really_ don't want to artificially restrict the width of the big
second column, and only show its full content via an auxiliary
popup.
My solution: check the widths in the process of creating the
window. If the middle column is going to push the third column
into the non-visible zone, restrict its width with
gtk_tree_view_column_set_max_width(). But also -- and this makes
the whole thing work -- add a callback to motion-notify-event for
the treeview:
static gboolean
big_col_callback (GtkWidget *w,
GdkEventMotion *e,
gpointer p)
{
GtkTreeViewColumn *col =
gtk_tree_view_get_column(GTK_TREE_VIEW(w), 1);
if (gtk_tree_view_column_get_max_width(col) > 0) {
/* remove the width constraint */
gtk_tree_view_column_set_max_width(col, -1);
}
return FALSE;
}
The effect is that column 1 starts at a size that allows the third
column to be visible, but as soon as the user moves the mouse in
the treeview window, the column becomes freely resizable.
Allin Cottrell
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reduce flicker while resizing columns of GtkTreeView on Windows
hi all, While trying to resize the GtkTreeView Columns on Windows Operating System, the text (label) in the column header seems to flicker (as the background of the treeview is visible.) This does not happen on Linux. What needs to be done to reduce this flicker so that the resize appears to be smooth? Thanks in advance, Abirami. The information contained in this electronic message and any attachments to this message are intended for the exclusive use of the addressee(s) and may contain proprietary, confidential or privileged information. If you are not the intended recipient, you should not disseminate, distribute or copy this e-mail. Please notify the sender immediately and destroy all copies of this message and any attachments contained in it. Contact your Administrator for further information. ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
