For instance, QAccessibleWidget reimplements this and returns
the windowHandle() of the QWidget.
- The default implementation returns the window() of the parent interface.
-
It is used on some platforms to be able to notify the AT client about
state changes.
+ The backend will traverse up all ancestors until it finds a window.
+ (This means that at least one interface among the ancestors should
+ return a valid QWindow pointer).
+
+ The default implementation of this returns 0.
\preliminary
*/
QWindow *QAccessibleInterface::window() const
{
- QAccessibleInterface *par = parent();
- QWindow *w = par ? par->window() : 0;
- delete par;
- return w;
+ return 0;
}
/*!
return S_OK;
}
+static QWindow *window_helper(const QAccessibleInterface *iface)
+{
+ QWindow *window = iface->window();
+ if (!window) {
+ QAccessibleInterface *acc = iface->parent();
+ while (acc && !window) {
+ window = acc->window();
+ QAccessibleInterface *par = acc->parent();
+ delete acc;
+ acc = par;
+ }
+ }
+ return window;
+}
+
HRESULT STDMETHODCALLTYPE QWindowsAccessible::GetWindow(HWND *phwnd)
{
*phwnd = 0;
if (!accessible->isValid())
return E_UNEXPECTED;
- QWindow *window = accessible->window();
+ QWindow *window = window_helper(accessible);
if (!window)
return E_FAIL;
// An event has to be associated with a window,
// so find the first parent that is a widget and that has a WId
QAccessibleInterface *iface = QAccessible::queryAccessibleInterface(o);
- QWindow *window = iface->window();
+ QWindow *window = window_helper(iface);
if (!window) {
window = QGuiApplication::activeWindow();