Respond with a sound for certain message boxes on windows

This was a regression (it worked in 4.8) that was probably introduced
by the refactoring of the accessibility framework in Qt 5.

Now, QPlatformAccessibility::notifyAccessibilityUpdate() is called
regardless of isActive(), so its the responsibility of each
implementation of notifyAccessibilityUpdate() to check for isActive()
where it matters.

Task-number: QTBUG-33303
Change-Id: I0d18f8c1890ef679460408b05e704712b886bf7c
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@theqtcompany.com>
Reviewed-by: Andy Shaw <andy.shaw@theqtcompany.com>

src/gui/accessible/qaccessible.cpp

@@ -852,18 +852,17 @@ void QAccessible::updateAccessibility(QAccessibleEvent *event)
     // during construction of widgets. If you see cases where the
     // cache seems wrong, this call is "to blame", but the code that
     // caches dynamic data should be updated to handle change events.
-    if (!isActive() || !event->accessibleInterface())
-        return;
+    QAccessibleInterface *iface = event->accessibleInterface();
+    if (isActive() && iface) {
+        if (event->type() == QAccessible::TableModelChanged) {
+            if (iface->tableInterface())
+                iface->tableInterface()->modelChange(static_cast<QAccessibleTableModelChangeEvent*>(event));
+        }
 
-    if (event->type() == QAccessible::TableModelChanged) {
-        QAccessibleInterface *iface = event->accessibleInterface();
-        if (iface && iface->tableInterface())
-            iface->tableInterface()->modelChange(static_cast<QAccessibleTableModelChangeEvent*>(event));
-    }
-
-    if (updateHandler) {
-        updateHandler(event);
-        return;
+        if (updateHandler) {
+            updateHandler(event);
+            return;
+        }
     }
 
     if (QPlatformAccessibility *pfAccessibility = platformAccessibility())

src/platformsupport/linuxaccessibility/bridge.cpp

@@ -99,7 +99,7 @@ void QSpiAccessibleBridge::notifyAccessibilityUpdate(QAccessibleEvent *event)
 {
     if (!dbusAdaptor)
         return;
-    if (isActive())
+    if (isActive() && event->accessibleInterface())
         dbusAdaptor->notify(event);
 }
 

src/plugins/platforms/cocoa/qcocoaaccessibility.mm

@@ -51,6 +51,8 @@ QCocoaAccessibility::~QCocoaAccessibility()
 
 void QCocoaAccessibility::notifyAccessibilityUpdate(QAccessibleEvent *event)
 {
+    if (!isActive() || !event->accessibleInterface())
+        return;
     QMacAccessibilityElement *element = [QMacAccessibilityElement elementWithId: event->uniqueId()];
     if (!element) {
         qWarning() << "QCocoaAccessibility::notifyAccessibilityUpdate: invalid element";

src/plugins/platforms/ios/qiosplatformaccessibility.mm

@@ -66,6 +66,8 @@ void invalidateCache(QAccessibleInterface *iface)
 
 void QIOSPlatformAccessibility::notifyAccessibilityUpdate(QAccessibleEvent *event)
 {
+    if (!isActive() || !event->accessibleInterface())
+        return;
     switch (event->type()) {
     case QAccessible::ObjectCreated:
     case QAccessible::ObjectShow:

src/plugins/platforms/windows/accessible/qwindowsaccessibility.cpp

@@ -151,7 +151,7 @@ void QWindowsAccessibility::notifyAccessibilityUpdate(QAccessibleEvent *event)
     // 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 = event->accessibleInterface();
-    if (!iface || !iface->isValid())
+    if (!isActive() || !iface || !iface->isValid())
         return;
     QWindow *window = QWindowsAccessibility::windowHelper(iface);