We currently don't expose value change events, although they are very important for support of progress meters and sliders: We don't expose these events because it was too difficult to find the old value. Let's find a way to expose the event without providing the old value. The spec does not say that detail1 has to be the old value. See the code: http://lxr.mozilla.org/seamonkey/source/accessible/src/base/nsRootAccessible.cpp#83 837 #if 0 838 // XXX todo: value change events for ATK are done with 839 // AtkPropertyChange, PROP_VALUE. Need the old and new value. 840 // Not sure how we'll get the old value. 841 // Aaron: I think this is a problem with the ATK API -- its much harder to 842 // grab the old value for all the application developers than it is for 843 // AT's to cache old values when they need to (when would that be!?) 844 else if (eventType.LowerCaseEqualsLiteral("valuechange")) { 845 privAcc->FireToolkitEvent(nsIAccessibleEvent::EVENT_VALUE_CHANGE, 846 accessible, nsnull); 847 } 848 #endif

Would like to test with http://www.mozilla.org/access/dhtml/slider

Comment on attachment 226690 [details] [diff] [review] Having trouble testing this because of AT poke freezes, but looks right r=me