Re: [g-a-devel]Accessibility for Gdk widgets in Pager Applet [workspace switcher]

["Padraig O'Briain" <Padraig Obriain sun com>]

I have not read your mail very closely. I would point you to bug 70798, which I 
raised on accessibility issues in Wnckpager and Havoc's comments.

If I understand Havoc's comments correctly, he thinks we should not bother 
trying to make the widget accessible.

Padraig


> Rajkumar Sivasamy wrote:
> > 
> > Hi,
> > Am looking at pager applet in terms of accessibility. (Desk Guide applet
> > is rewritten as pager applet in gnome-panel/applets/gen_util). The UI
> > widgets of this applet are part of the library "libwnck", the library
> > makes use of Gdk widgets to draw the applet's "workspace icon" (the base
> > gdk rectangle representing a workspace) and the "workspace content icon"
> > (the gdk rectangle corresponding to a particular component in a
> > workspace).
> 
> When dealing with widgets that paint non-GOBject-based elements
> into themselves (such as Gdk rectangles), our options are limited.
> About the best you can do is to implement accessibility on the
> container, override get_n_children and ref_child, and return 
> special AtkObject instances which you create inside the applet code.
> You can't really create factory instances for the Gdk elements since 
> they are not really widgets, so you create them on-demand inside
> the container's ref_child implementation, and must cache them, etc.
> 
> These AtkObjects (the child objects of the container's AtkObject)
> should implement AtkComponent, and AtkAction; I believe that the
> container should implement AtkSelection.   The AtkAction impleentation
> for the children might be unnecessary if it is fullt redundant with
> AtkSelection for the container (i.e. the Pager GtkWidget).
> 
> -Bill
> 
> > Workspaces can be switched from one to another by clicking on the
> > corresponding "workspace icon" of the applet. In terms of accessibility
> > I guess AtkAction interface has to be implemented for the "workspace
> > icon" which inturn is a Gdk Rectangle.
> > 
> > The pager structure inturn has three GtkWidgets:
> > a) GtkWidget *applet,
> > b) GtkWidget *frame,
> > c) GtkWidget *pager.
> > This Gtk pager widget is burried to Gtk frame, which inturn is
> > encapsulated to Gtk applet. I could able to set up tooltip for this Gtk
> > applet widget, which will be displayed when the mouse scrolls over this
> > Applet.
> > 
> > But am not sure of how to go ahead in implementing Atk interfaces for
> > these gdk widgets (Gdk Rectangle). For which widget the get_accessible
> > method has to be implemented?
> > 
> > The ferret o/p shows:
> > Applet's Accessible Type as GailContainer and
> > Parent Accessible Type as GailBox.
> > 
> > Pls, mail back u'r comments on this.
> > 
> > Thanks & Regards,
> > Raj.
> > _______________________________________________
> > Gnome-accessibility-devel mailing list
> > Gnome-accessibility-devel gnome org
> > http://mail.gnome.org/mailman/listinfo/gnome-accessibility-devel
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