AXDescription set in nib cannot be accessed in code
Originator: | motownavi | ||
Number: | rdar://7496255 | Date Originated: | 12/23/09 |
Status: | Open | Resolved: | |
Product: | Mac OS X | Product Version: | 10.6 |
Classification: | Serious Bug | Reproducible: | Always |
If a button (or other UI element) has an AXDescription set via a nib, it is set using -[NSAccessibility accessibilitySetOverrideValue:forAttribute:]. This is a problem because it's just about impossible to retrieve that value programatically (you can use the AX APIs but they don't work if the view is not on-screen). As a specific example, I set a description in IB for a cell: <ClickHoldButtonCell: 0x1797d0> (ClickHoldButtonCell is a subclass of NSButtonCell.) (gdb) po (id)[0x1797d0 accessibilityAttributeNames] <NSCFArray 0x1837b0>( AXRole, AXRoleDescription, AXHelp, AXEnabled, AXFocused, AXParent, AXWindow, AXTopLevelUIElement, AXPosition, AXSize, AXTitle ) (gdb) po (id)[0x1797d0 accessibilityAttributeValue:@"AXDescription"] 2009-12-22 16:19:12.294 Chromium[17058:813] "AXDescription" attribute unsupported by: <ClickHoldButtonCell: 0x1797d0> This bug makes it impossible to write view localizers that handle accessibility. Please either extend the current API to access overriding values, or introduce new API to allow it.
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