Re: [g-a-devel] [Accessibility-atspi] proposing ATK/AT-SPI API additions

[Mike Gorse <mgorse novell com>]

Hi Rich,

Sorry for never answering this when you first sent it.

You can get a list of at-spi events by looking at EVENT_TREE in 
pyatspi/constants.py in the pyatspi sources. Ie,
git clone git://git.gnome.org/pyatspi2

Atk events generally correspond to AT-SPI events (ie, 
"object:bounds-changed" in AT-SPI would be generated by emitting a 
bounds_changed signal on the ATK object).  Focus events are an exception 
to this--the atk implementor should call atk_focus_tracker_notify to let 
listeners such as atk-bridge know that the focus has changed.

-Mike

On Mon, 24 Jan 2011, Richard Schwerdtfeger wrote:

> Would someone provide me with a link to the latest list of ATSPI events? I need to fill in gaps in the ARIA Implementation Guide.
>
> Rich
>
>
> Rich Schwerdtfeger
> CTO Accessibility Software Group
>
> Inactive hide details for Peter Korn ---01/18/2011 02:59:18 PM---Hi Mike, From my own experience I haven't see any AT actually Peter Korn ---01/18/2011 02:59:18 PM---Hi
> Mike, From my own experience I haven't see any AT actually need these setter
>
> From: Peter Korn <peter korn oracle com>
> To: Mike Gorse <mgorse novell com>
> Cc: gnome-accessibility-devel gnome org, accessibility-atspi lists linuxfoundation org
> Date: 01/18/2011 02:59 PM
> Subject: Re: [Accessibility-atspi] [g-a-devel] proposing ATK/AT-SPI API additions
> Sent by: accessibility-atspi-bounces lists linux-foundation org
>
> ____________________________________________________________________________________________________________________________________________________________________________
>
>
>
> Hi Mike,
>
> From my own experience I haven't see any AT actually need these setter APIs. Not all apps want to let users move windows around (e.g. MessageBox style windows/dialogs).
> Exposing API for doing things programmatically that otherwise cannot be done through the UI is treacherous ground - something we need a very compelling accessibility reason
> to do.
>
> Supporting a macro package doesn't pass that bar for me.
>
>
> Peter
>
> On 1/14/2011 4:37 PM, Mike Gorse wrote:
> Hi all,
>
> I would like to propose a few additions to ATK and AT-SPI:
>
> - In atk, the size and position of a window can be get or set. Gail already has code implementing this for gtk widgets, but the functionality is currently not exposed over
> at-spi; there are methods to get the extents, size, and position of a window but no corresponding method to set them. I propose to add setSize, setPosition, and setExtents
> methods to the at-spi Component interface. The GAIL implementation of set_extents only affects top-level windows; it does nothing for all other widgets.
>
> I also propose to add an atk function with the following prototype if no one objects / people think it makes sense:
>
> gpointer atk_object_get_native_window_handle (AtkObject *accessible);
>
> This would return a handle from the native windowing system for the given object, if available. It may return NULL.
>
> I have had a discussion with someone who is working on porting a macro language from Windows and requested this functionality. Apparently it is possible with this package
> to change the title of a window, for instance, and this can be done under Windows but not through AT-SPI under Linux. Both of these additions would also help for the
> AT-SPI-to-UIA bridge, since UI Automation exposes functionality corresponding to what I am describing. I am not really sure what I think of the get_native_window_handle
> bit, since it would allow a program to do things other than what an end user could do, so I am not sure if there are security implications. Perhaps similar functionality is
> already available through X, though, in which case I don't think it would create significant security issues beyond what is already there.
>
> Does anyone have any thoughts?
>
> Thanks,
> -Mike G-
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>
> --
> Oracle
> Peter Korn | Accessibility Principal
> Phone: +1 650 5069522
> 500 Oracle Parkway | Redwood City, CA 94065
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