Details
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Bug
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Resolution: Done
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Not Evaluated
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6.5
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None
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Debian testing, qtbase self-compiled from dev branch as of commit 0131dbd2f95449c09758208d8b190c9238a5c46a
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Linux/X11
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0c0eadc484 (qt/qtbase/dev) 0c0eadc484 (qt/tqtc-qtbase/dev) e3de89533b (qt/qtbase/6.4) e3de89533b (qt/tqtc-qtbase/6.4), 442e347f5 (dev), 012dfa9d0 (6.5), 7b669203b (6.4), cc7e5a7f4 (6.4.3)
Description
When creating a QAccessibleEvent using the constructor taking a QAccessibleInterface* parameter, calling the setChild method on it results in QAccessibleEvent::accessibleInterface() returning nullptr instead of an actual QAccessibleInterface*, i.e. it is no not possible to retrieve the associated interface.
It works as expected when using the QAccessibleEvent constructor that takes a QObject* instead, even if the underlying object is just the same in both cases.
Sample to reproduce:
(I'll also submit that as a test case along with a suggested fix):
QWidget widget;
QWidget childWidget(&widget);
// QAccessibleEvent constructor called with the QObject*
QAccessibleEvent event1(&widget, QAccessible::Focus);
// QAccessibleEvent constructor called with the QAccessibleInterface* for the same QObject*
QAccessibleInterface *iface = QAccessible::queryAccessibleInterface(&widget);
QAccessibleEvent event2(iface, QAccessible::Focus);
// all fine here before calling QAccessibleEvent::setChild
assert(event1.accessibleInterface() != nullptr);
assert(event2.accessibleInterface() != nullptr);
assert(event1.accessibleInterface(), event2.accessibleInterface());
// set same child for both
event1.setChild(0);
event2.setChild(0);
// this is still OK, case where the ctor taking QObject* was used
assert(event1.accessibleInterface() != nullptr);
// these two fail
assert(event2.accessibleInterface() != nullptr);
assert(event1.accessibleInterface(), event2.accessibleInterface());
(The original scenario where I ran into this was with the Qt 6 based UI variant of LibreOffice where QAccessibleEvent_s e.g. of type _QAccessible::SelectionAdd did not trigger any AT-SPI events when created with the ctor taking QAccessibleInterface.)