Pointer grabs causing accessibility issues! Why not deprecate them?
xavier.bestel at free.fr
Mon Apr 28 06:22:54 PDT 2008
On Mon, 2008-04-28 at 22:43 +0930, Peter Hutterer wrote:
> Francesco Fumanti wrote:
> > Could you please expand on the main reasons why it is not feasible?
> > For example, in what situations are the pointer grabs really unavoidable
> > and unreplacable by other techniques?
> pointer grabs are a method of guaranteeing that events are delivered to
> a certain client - and not to the window underneath the pointer as usual.
> the most common uses I can think of:
> - popup menus: apps use grabs for them because it can tell them whether
> the following click was on the window or outside. implementing the same
> functionality without a grab would require the client to register for
> click events on every single visible window. This is unfeasable.
Just as a data point: AFAIK under Windows, the toolkits just care for
the clicks in their own window to cancel a popup menu, not on the whole
desktop. So a buggy application can't grab the UI.
That doesn't make your other statements less true, of course.
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