Re: tooltip on treeview cell

Julien Moutinho <[email protected]> writes:

> On Thu, Feb 14, 2008 at 06:57:38PM -0600, Yoann Padioleau wrote:
>> Hi,
> Hi,
>
>> How can I set the tooltip for a cell in a treeview ?
>> Apparently the other gtk bindings offer a method
>> set_tooltip_tree_cell() but I didn't find it in
>> lablgtk.
>
> AFAIK, if you use a GTK+ whose version is lower than 2.12,
> then its tooltip machinery, GtkTooltips (note the 's'),
> does not handle treeview tooltips.
> So the usual way is to do it manually, that is, to hook
> a motion_notify callback to the treeview, which will call
> a get_path_at_pos to retrieve the treeview cell under the cursor,
> whose data is then used to hide/show a popup window actually
> being the tooltip.


Is there some (ocaml) code somewhere that does exactly this ? 

>
> However GTK+ 2.12 came up with a new tooltip machinery,
> GtkTooltip (no 's' now), which is way more powerful
> and handles treeview tooltips:
>   http://mail.gnome.org/archives/gtk-devel-list/2007-June/msg00092.html
>
> A few months ago, I've wrapped GtkTooltip into the SVN of LablGTK:
>   http://svn.gna.org/viewcvs/lablgtk/trunk
> One example for doing what you want with it being there:
>   http://svn.gna.org/viewcvs/lablgtk/trunk/examples/tooltip.ml?rev=1392

I get this when I try to compile tooltip.ml from 
the lablgtk subversion repository:

$ ocamlc -c -I ../src/ tooltip.ml
File "tooltip.ml", line 66, characters 1-12:
This expression has type GObj.misc_ops
It has no method set_tooltip_text

Do I also need a special version of lablgtk ? 

>
> However this wrap segfaults on my Debian box if the following
> patch against GTK+2.12 is not applied :
>   http://bugzilla.gnome.org/show_bug.cgi?id=478519
> I'm joining to this mail the patch updated to GTK+ 2.12.6.


>
> Feel free to tell GTK+'s developers your concern about BR#478519.
>
> HTH.
>
>
> --- gtk/gtktooltip.c.orig	2008-01-29 04:35:47.000000000 +0100
> +++ gtk/gtktooltip.c	2008-02-15 16:28:46.000000000 +0100
> @@ -862,6 +862,9 @@
>    tooltip = g_object_get_data (G_OBJECT (display),
>  			       "gdk-display-current-tooltip");
>  
> +  if (!tooltip)
> +    return;
> +
>    if (tooltip->keyboard_mode_enabled)
>      {
>        pointer_widget = tooltip_widget = tooltip->keyboard_widget;
> @@ -886,8 +889,6 @@
>  
>    g_object_get (tooltip_widget, "has-tooltip", &has_tooltip, NULL);
>  
> -  g_assert (tooltip != NULL);
> -
>    return_value = gtk_tooltip_run_requery (&tooltip_widget, tooltip, &x, &y);
>    if (!return_value)
>      return;
> @@ -994,7 +995,8 @@
>  
>    tooltip = g_object_get_data (G_OBJECT (display),
>  			       "gdk-display-current-tooltip");
> -  tooltip->timeout_id = 0;
> +  if (tooltip)
> +    tooltip->timeout_id = 0;
>  
>    return FALSE;
>  }
> @@ -1009,7 +1011,7 @@
>    tooltip = g_object_get_data (G_OBJECT (display),
>  			       "gdk-display-current-tooltip");
>  
> -  if (tooltip && GTK_TOOLTIP_VISIBLE (tooltip))
> +  if (!tooltip || GTK_TOOLTIP_VISIBLE (tooltip))
>      return;
>  
>    if (tooltip->timeout_id)
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