Re: OT: icon problem

[Peter Bloomfield <PeterBloomfield bellsouth net>]

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Hi Jack:

On 05/25/2017 06:14:13 PM Thu, Jack wrote:
> This is not a Balsa issue, but probably some underlying gtk icon issue.  The icons for adjusting the relative 
> position of panes GtkPaned ?) have the vertical and horizontal icons swapped.  For example, I use the default 
> layout with preview pane.  If I try to adjust the relative height of the message list and preview pane, the 
> icon for grabbing the separator is two vertical bars with arrows to the right and left.  If I try to adjust 
> the relative size of the mailbox list (left) and the message list and preview pane (right) the icon is two 
> horizontal bars and arrows pointing up and down.  I see the same problem in the gentoo file browser 
> (application by that name, having nothing to do with the Gentoo distro.)  I've hunted through every gtk3 them 
> and icon I can find, and cannot find those icons.  Does anyone know where they come from?  Are they build 
> into gtk3?  It's not really imporant, but it's starting to drive me crazy that I can't find where they are 
> coming from.
>
> Thanks for any suggestions.

The relevant code in gtkpaned.c may be:

      if (gtk_widget_is_sensitive (widget))
        cursor = gdk_cursor_new_from_name (gtk_widget_get_display (widget),
                                           priv->orientation == GTK_ORIENTATION_HORIZONTAL
                                           ? "col-resize" : "row-resize");
      else
        cursor = NULL;

      gdk_window_set_cursor (priv->handle, cursor);

The doc[1] shows all the available cursors, and "col-resize" and "row-resize" are what you'd expect. It 
states that:

[gdk_cursor_new_from_name] Creates a new cursor by looking up name in the current cursor theme.

so the fault may lie in the "current cursor theme", whatever that is! On my Fedora box, 
/usr/share/icons/Adwaita/cursors/col-resize is a symlink to /usr/share/icons/Adwaita/cursors/sb_h_double_arrow, which "file" 
declares to be an "X11 cursor", and which is indeed a double-ended horizontal arrow. You could try looking for some file with 
col[-_]resize in its name--that's the best I can suggest!

Peter

[1] https://developer.gnome.org/gdk3/stable/gdk3-Cursors.html#gdk-cursor-new-from-name
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