Cache QAccessibleInterfaces.

Since there already is a one-to-one relationship
between QObject and QAccessibleInterface it makes
little sense to create and destroy the interfaces
on each call to queryAccessibleInterface.

Add a cache and keep created interfaces around for
the lifetime of the corresponding QObject.

This changes the memory management rules: accessible
interfaces must no longer be deleted. If you get an
QAccessibleIntrface pointer that pointer will stay
valid as long as the corresponding QObject is not
deleted.

This also re-enables accessibility for Mac.

We limit the range of the IDs so that they are
useable for Windows directly.
That means we can get rid of the event cache there.

This is based on: Iebf2f374916fc70a9dd29e95f45a6444b85f6cee

Change-Id: I9fe6531812c0dbc5b41101ac05830a6dd75e13a3
Reviewed-by: Morten Johan Sørvig <morten.sorvig@digia.com>

1 files changed, 68 insertions, 105 deletions

diff --git a/src/plugins/platforms/windows/accessible/qwindowsmsaaaccessible.cpp b/src/plugins/platforms/windows/accessible/qwindowsmsaaaccessible.cpp
index 9958615d45..7eb1bd30c0 100644
--- a/src/plugins/platforms/windows/accessible/qwindowsmsaaaccessible.cpp
+++ b/src/plugins/platforms/windows/accessible/qwindowsmsaaaccessible.cpp
@@ -186,21 +186,6 @@ HRESULT STDMETHODCALLTYPE QWindowsEnumerate::Skip(unsigned long celt)
     return S_OK;
 }
 
-static bool compareAccessible(QAccessibleInterface *one, QAccessibleInterface *other)
-{
-    if (one == other) return true;
-    if (!one || !other) return false;
-
-    if (one->object() && other->object() && (one->object() == other->object()))
-        return true;
-    QAIPointer onePar(one->parent());
-    QAIPointer otherPar(other->parent());
-
-    if (compareAccessible(onePar.data(), otherPar.data()))
-        return onePar->indexOfChild(one) == otherPar->indexOfChild(other);
-    return false;
-}
-
 #ifndef QT_NO_DEBUG
 bool debug_accessibility()
 {
@@ -232,7 +217,9 @@ HRESULT STDMETHODCALLTYPE QWindowsMsaaAccessible::QueryInterface(REFIID id, LPVO
 
     QByteArray strIID = IIDToString(id);
     if (!strIID.isEmpty()) {
-        QString ss; QDebug dbg(&ss); dbg << accessible;
+        QString ss;
+        QDebug dbg(&ss);
+        dbg << accessibleInterface();
         accessibleDebug("QWindowsIA2Accessible::QI() - IID:%s, iface:%s ", strIID.constData(), qPrintable(ss));
     }
     if (id == IID_IUnknown) {
@@ -533,8 +520,9 @@ IAccessible::accHitTest documents the value returned in pvarID like this:
 */
 HRESULT STDMETHODCALLTYPE QWindowsMsaaAccessible::accHitTest(long xLeft, long yTop, VARIANT *pvarID)
 {
+    QAccessibleInterface *accessible = accessibleInterface();
     accessibleDebugClientCalls(accessible);
-    if (!accessible->isValid())
+    if (!accessible)
         return E_FAIL;
 
     QAccessibleInterface *child = accessible->childAt(xLeft, yTop);
@@ -571,14 +559,15 @@ HRESULT STDMETHODCALLTYPE QWindowsMsaaAccessible::accHitTest(long xLeft, long yT
 // moz: [important]
 HRESULT STDMETHODCALLTYPE QWindowsMsaaAccessible::accLocation(long *pxLeft, long *pyTop, long *pcxWidth, long *pcyHeight, VARIANT varID)
 {
+    QAccessibleInterface *accessible = accessibleInterface();
     accessibleDebugClientCalls(accessible);
-    if (!accessible->isValid())
+    if (!accessible)
         return E_FAIL;
 
     QRect rect;
     if (varID.lVal) {
-        QAIPointer child(childPointer(varID));
-        if (!child)
+        QAccessibleInterface *child = accessible->child(varID.lVal - 1);
+        if (!child || !child->isValid())
             return E_FAIL;
         rect = child->rect();
     } else {
@@ -596,8 +585,9 @@ HRESULT STDMETHODCALLTYPE QWindowsMsaaAccessible::accLocation(long *pxLeft, long
 // moz: [important, but no need to implement up/down/left/right]
 HRESULT STDMETHODCALLTYPE QWindowsMsaaAccessible::accNavigate(long navDir, VARIANT varStart, VARIANT *pvarEnd)
 {
+    QAccessibleInterface *accessible = accessibleInterface();
     accessibleDebugClientCalls(accessible);
-    if (!accessible->isValid())
+    if (!accessible)
         return E_FAIL;
 
     QAccessibleInterface *acc = 0;
@@ -617,7 +607,6 @@ HRESULT STDMETHODCALLTYPE QWindowsMsaaAccessible::accNavigate(long navDir, VARIA
                 index += (navDir == NAVDIR_NEXT) ? 1 : -1;
                 if (index >= 0 && index < parent->childCount())
                     acc = parent->child(index);
-                delete parent;
             }
         } else {
             int index = varStart.lVal;
@@ -646,7 +635,6 @@ HRESULT STDMETHODCALLTYPE QWindowsMsaaAccessible::accNavigate(long navDir, VARIA
                 Q_ASSERT(sibling);
                 if (i == indexOfOurself || sibling->state().invisible) {
                     //ignore ourself and invisible siblings
-                    delete sibling;
                     continue;
                 }
 
@@ -660,7 +648,6 @@ HRESULT STDMETHODCALLTYPE QWindowsMsaaAccessible::accNavigate(long navDir, VARIA
                     startp = QPoint(startg.left(), startg.top() + startg.height() / 2);
                     sibp = QPoint(sibg.right(), sibg.top() + sibg.height() / 2);
                     if (QPoint(sibc - startc).x() >= 0) {
-                        delete sibling;
                         continue;
                     }
                     distp = sibp - startp;
@@ -669,7 +656,6 @@ HRESULT STDMETHODCALLTYPE QWindowsMsaaAccessible::accNavigate(long navDir, VARIA
                     startp = QPoint(startg.right(), startg.top() + startg.height() / 2);
                     sibp = QPoint(sibg.left(), sibg.top() + sibg.height() / 2);
                     if (QPoint(sibc - startc).x() <= 0) {
-                        delete sibling;
                         continue;
                     }
                     distp = sibp - startp;
@@ -678,7 +664,6 @@ HRESULT STDMETHODCALLTYPE QWindowsMsaaAccessible::accNavigate(long navDir, VARIA
                     startp = QPoint(startg.left() + startg.width() / 2, startg.top());
                     sibp = QPoint(sibg.left() + sibg.width() / 2, sibg.bottom());
                     if (QPoint(sibc - startc).y() >= 0) {
-                        delete sibling;
                         continue;
                     }
                     distp = sibp - startp;
@@ -687,7 +672,6 @@ HRESULT STDMETHODCALLTYPE QWindowsMsaaAccessible::accNavigate(long navDir, VARIA
                     startp = QPoint(startg.left() + startg.width() / 2, startg.bottom());
                     sibp = QPoint(sibg.left() + sibg.width() / 2, sibg.top());
                     if (QPoint(sibc - startc).y() <= 0) {
-                        delete sibling;
                         continue;
                     }
                     distp = sibp - startp;
@@ -700,14 +684,10 @@ HRESULT STDMETHODCALLTYPE QWindowsMsaaAccessible::accNavigate(long navDir, VARIA
                 // squared distance, (thus, no need to take the sqrt()).
                 unsigned dist = distp.x() * distp.x() + distp.y() * distp.y();
                 if (dist < mindist) {
-                    delete candidate;
                     candidate = sibling;
                     mindist = dist;
-                } else {
-                    delete sibling;
                 }
             }
-            delete pIface;
             acc = candidate;
         }
     }
@@ -724,9 +704,6 @@ HRESULT STDMETHODCALLTYPE QWindowsMsaaAccessible::accNavigate(long navDir, VARIA
         (*pvarEnd).vt = VT_DISPATCH;
         (*pvarEnd).pdispVal = iface;
         return S_OK;
-    } else {
-        if (acc != accessible)
-            delete acc;
     }
 
     (*pvarEnd).vt = VT_EMPTY;
@@ -736,8 +713,9 @@ HRESULT STDMETHODCALLTYPE QWindowsMsaaAccessible::accNavigate(long navDir, VARIA
 // moz: [important]
 HRESULT STDMETHODCALLTYPE QWindowsMsaaAccessible::get_accChild(VARIANT varChildID, IDispatch** ppdispChild)
 {
+    QAccessibleInterface *accessible = accessibleInterface();
     accessibleDebugClientCalls(accessible);
-    if (!accessible->isValid())
+    if (!accessible)
         return E_FAIL;
 
     if (varChildID.vt != VT_I4)
@@ -745,38 +723,18 @@ HRESULT STDMETHODCALLTYPE QWindowsMsaaAccessible::get_accChild(VARIANT varChildI
 
 
     int childIndex = varChildID.lVal;
+
     QAccessibleInterface *acc = 0;
 
-    if (childIndex < 0) {
-        const int entry = childIndex;
-        QPair<QObject*, int> ref = QWindowsAccessibility::getCachedObject(entry);
-        if (ref.first) {
-            acc = QAccessible::queryAccessibleInterface(ref.first);
-            if (acc && ref.second >= 0) {
-                QAccessibleInterface *res = acc->child(ref.second);
-                delete acc;
-                if (!res)
-                    return E_INVALIDARG;
-                acc = res;
-            }
-        } else {
-            qWarning("get_accChild got a negative varChildID (%d), but did not find it in cache", childIndex);
-        }
+
+    if (childIndex == 0) {
+        // Yes, some AT clients (Active Accessibility Object Inspector)
+        // actually ask for the same object. As a consequence, we need to clone ourselves:
+        acc = accessible;
+    } else if (childIndex < 0) {
+        acc = QAccessible::accessibleInterface((QAccessible::Id)childIndex);
     } else {
-        if (childIndex) {
-            acc = accessible->child(childIndex - 1);
-        } else {
-            // Yes, some AT clients (Active Accessibility Object Inspector)
-            // actually ask for the same object. As a consequence, we need to clone ourselves:
-            if (QAccessibleInterface *par = accessible->parent()) {
-                const int indexOf = par->indexOfChild(accessible);
-                if (indexOf == -1)
-                    qWarning() << "inconsistent hierarchy, parent:" << par << "child:" << accessible;
-                else
-                    acc = par->child(indexOf);
-                delete par;
-            }
-        }
+        acc = accessible->child(childIndex - 1);
     }
 
     if (acc) {
@@ -790,8 +748,9 @@ HRESULT STDMETHODCALLTYPE QWindowsMsaaAccessible::get_accChild(VARIANT varChildI
 // moz: [important]
 HRESULT STDMETHODCALLTYPE QWindowsMsaaAccessible::get_accChildCount(long* pcountChildren)
 {
+    QAccessibleInterface *accessible = accessibleInterface();
     accessibleDebugClientCalls(accessible);
-    if (!accessible->isValid())
+    if (!accessible)
         return E_FAIL;
 
     *pcountChildren = accessible->childCount();
@@ -801,8 +760,9 @@ HRESULT STDMETHODCALLTYPE QWindowsMsaaAccessible::get_accChildCount(long* pcount
 // moz: [important]
 HRESULT STDMETHODCALLTYPE QWindowsMsaaAccessible::get_accParent(IDispatch** ppdispParent)
 {
+    QAccessibleInterface *accessible = accessibleInterface();
     accessibleDebugClientCalls(accessible);
-    if (!accessible->isValid())
+    if (!accessible)
         return E_FAIL;
 
     QAccessibleInterface *acc = accessible->parent();
@@ -810,8 +770,6 @@ HRESULT STDMETHODCALLTYPE QWindowsMsaaAccessible::get_accParent(IDispatch** ppdi
         if (IAccessible *iface = QWindowsAccessibility::wrap(acc)) {
             *ppdispParent = iface;
             return S_OK;
-        } else {
-            delete acc;
         }
     }
 
@@ -825,8 +783,9 @@ HRESULT STDMETHODCALLTYPE QWindowsMsaaAccessible::get_accParent(IDispatch** ppdi
 HRESULT STDMETHODCALLTYPE QWindowsMsaaAccessible::accDoDefaultAction(VARIANT varID)
 {
     Q_UNUSED(varID);
+    QAccessibleInterface *accessible = accessibleInterface();
     accessibleDebugClientCalls(accessible);
-    if (!accessible->isValid())
+    if (!accessible)
         return E_FAIL;
 
     if (QAccessibleActionInterface *actionIface = accessible->actionInterface()) {
@@ -842,8 +801,9 @@ HRESULT STDMETHODCALLTYPE QWindowsMsaaAccessible::accDoDefaultAction(VARIANT var
 HRESULT STDMETHODCALLTYPE QWindowsMsaaAccessible::get_accDefaultAction(VARIANT varID, BSTR* pszDefaultAction)
 {
     Q_UNUSED(varID);
+    QAccessibleInterface *accessible = accessibleInterface();
     accessibleDebugClientCalls(accessible);
-    if (!accessible->isValid())
+    if (!accessible)
         return E_FAIL;
 
     *pszDefaultAction = 0;
@@ -857,14 +817,15 @@ HRESULT STDMETHODCALLTYPE QWindowsMsaaAccessible::get_accDefaultAction(VARIANT v
 
 HRESULT STDMETHODCALLTYPE QWindowsMsaaAccessible::get_accDescription(VARIANT varID, BSTR* pszDescription)
 {
+    QAccessibleInterface *accessible = accessibleInterface();
     accessibleDebugClientCalls(accessible);
-    if (!accessible->isValid())
+    if (!accessible)
         return E_FAIL;
 
 
     QString descr;
     if (varID.lVal) {
-        QAIPointer child = childPointer(varID);
+        QAccessibleInterface *child = childPointer(varID);
         if (!child)
             return E_FAIL;
         descr = child->text(QAccessible::Description);
@@ -882,13 +843,14 @@ HRESULT STDMETHODCALLTYPE QWindowsMsaaAccessible::get_accDescription(VARIANT var
 
 HRESULT STDMETHODCALLTYPE QWindowsMsaaAccessible::get_accHelp(VARIANT varID, BSTR *pszHelp)
 {
+    QAccessibleInterface *accessible = accessibleInterface();
     accessibleDebugClientCalls(accessible);
-    if (!accessible->isValid())
+    if (!accessible)
         return E_FAIL;
 
     QString help;
     if (varID.lVal) {
-        QAIPointer child = childPointer(varID);
+        QAccessibleInterface *child = childPointer(varID);
         if (!child)
             return E_FAIL;
         help = child->text(QAccessible::Help);
@@ -912,8 +874,9 @@ HRESULT STDMETHODCALLTYPE QWindowsMsaaAccessible::get_accHelpTopic(BSTR *, VARIA
 HRESULT STDMETHODCALLTYPE QWindowsMsaaAccessible::get_accKeyboardShortcut(VARIANT varID, BSTR *pszKeyboardShortcut)
 {
     Q_UNUSED(varID);
+    QAccessibleInterface *accessible = accessibleInterface();
     accessibleDebugClientCalls(accessible);
-    if (!accessible->isValid())
+    if (!accessible)
         return E_FAIL;
 
     *pszKeyboardShortcut = 0;
@@ -933,29 +896,26 @@ static QAccessibleInterface *relatedInterface(QAccessibleInterface *iface, QAcce
     typedef QPair<QAccessibleInterface *, QAccessible::Relation> RelationPair;
     QVector<RelationPair> rels = iface->relations(flag);
 
-    for (int i = 1; i < rels.count(); ++i)
-        delete rels.at(i).first;
-
     return rels.value(0).first;
 }
 
 // moz: [important]
 HRESULT STDMETHODCALLTYPE QWindowsMsaaAccessible::get_accName(VARIANT varID, BSTR* pszName)
 {
+    QAccessibleInterface *accessible = accessibleInterface();
     accessibleDebugClientCalls(accessible);
-    if (!accessible->isValid())
+    if (!accessible)
         return E_FAIL;
 
     QString name;
     if (varID.lVal) {
-        QAIPointer child = childPointer(varID);
+        QAccessibleInterface *child = childPointer(varID);
         if (!child)
             return E_FAIL;
         name = child->text(QAccessible::Name);
         if (name.isEmpty()) {
-            if (QAccessibleInterface *labelInterface = relatedInterface(child.data(), QAccessible::Label)) {
+            if (QAccessibleInterface *labelInterface = relatedInterface(child, QAccessible::Label)) {
                 name = labelInterface->text(QAccessible::Name);
-                delete labelInterface;
             }
         }
     } else {
@@ -963,7 +923,6 @@ HRESULT STDMETHODCALLTYPE QWindowsMsaaAccessible::get_accName(VARIANT varID, BST
         if (name.isEmpty()) {
             if (QAccessibleInterface *labelInterface = relatedInterface(accessible, QAccessible::Label)) {
                 name = labelInterface->text(QAccessible::Name);
-                delete labelInterface;
             }
         }
     }
@@ -978,6 +937,7 @@ HRESULT STDMETHODCALLTYPE QWindowsMsaaAccessible::get_accName(VARIANT varID, BST
 
 HRESULT STDMETHODCALLTYPE QWindowsMsaaAccessible::put_accName(VARIANT, BSTR)
 {
+    QAccessibleInterface *accessible = accessibleInterface();
     accessibleDebugClientCalls(accessible);
     return DISP_E_MEMBERNOTFOUND;
 }
@@ -985,13 +945,14 @@ HRESULT STDMETHODCALLTYPE QWindowsMsaaAccessible::put_accName(VARIANT, BSTR)
 // moz: [important]
 HRESULT STDMETHODCALLTYPE QWindowsMsaaAccessible::get_accRole(VARIANT varID, VARIANT *pvarRole)
 {
+    QAccessibleInterface *accessible = accessibleInterface();
     accessibleDebugClientCalls(accessible);
-    if (!accessible->isValid())
+    if (!accessible)
         return E_FAIL;
 
     QAccessible::Role role;
     if (varID.lVal) {
-        QAIPointer child = childPointer(varID);
+        QAccessibleInterface *child = childPointer(varID);
         if (!child)
             return E_FAIL;
         role = child->role();
@@ -1019,14 +980,15 @@ HRESULT STDMETHODCALLTYPE QWindowsMsaaAccessible::get_accRole(VARIANT varID, VAR
 // moz: [important]
 HRESULT STDMETHODCALLTYPE QWindowsMsaaAccessible::get_accState(VARIANT varID, VARIANT *pvarState)
 {
+    QAccessibleInterface *accessible = accessibleInterface();
     accessibleDebugClientCalls(accessible);
-    if (!accessible->isValid())
+    if (!accessible)
         return E_FAIL;
 
     QAccessible::State state;
     if (varID.lVal) {
-        QAIPointer child = childPointer(varID);
-        if (!child.data())
+        QAccessibleInterface *child = childPointer(varID);
+        if (!child)
             return E_FAIL;
         state = child->state();
     } else {
@@ -1095,11 +1057,12 @@ HRESULT STDMETHODCALLTYPE QWindowsMsaaAccessible::get_accState(VARIANT varID, VA
 // moz: [important]
 HRESULT STDMETHODCALLTYPE QWindowsMsaaAccessible::get_accValue(VARIANT varID, BSTR* pszValue)
 {
+    QAccessibleInterface *accessible = accessibleInterface();
     accessibleDebugClientCalls(accessible);
     if (varID.vt != VT_I4)
         return E_INVALIDARG;
 
-    if (!accessible->isValid() || varID.lVal) {
+    if (!accessible || !accessible->isValid() || varID.lVal) {
         return E_FAIL;
     }
 
@@ -1121,6 +1084,7 @@ HRESULT STDMETHODCALLTYPE QWindowsMsaaAccessible::get_accValue(VARIANT varID, BS
 
 HRESULT STDMETHODCALLTYPE QWindowsMsaaAccessible::put_accValue(VARIANT, BSTR)
 {
+    QAccessibleInterface *accessible = accessibleInterface();
     accessibleDebugClientCalls(accessible);
     return DISP_E_MEMBERNOTFOUND;
 }
@@ -1130,8 +1094,9 @@ HRESULT STDMETHODCALLTYPE QWindowsMsaaAccessible::accSelect(long flagsSelect, VA
 {
     Q_UNUSED(flagsSelect);
     Q_UNUSED(varID);
+    QAccessibleInterface *accessible = accessibleInterface();
     accessibleDebugClientCalls(accessible);
-    if (!accessible->isValid())
+    if (!accessible)
         return E_FAIL;
 
     bool res = false;
@@ -1141,17 +1106,17 @@ HRESULT STDMETHODCALLTYPE QWindowsMsaaAccessible::accSelect(long flagsSelect, VA
 
   ### and if there are no ia2 interfaces we should do nothing??
     if (flagsSelect & SELFLAG_TAKEFOCUS)
-        res = accessible->doAction(SetFocus, varID.lVal, QVariantList());
+        res = accessible()->doAction(SetFocus, varID.lVal, QVariantList());
     if (flagsSelect & SELFLAG_TAKESELECTION) {
-        accessible->doAction(ClearSelection, 0, QVariantList());
-        res = accessible->doAction(AddToSelection, varID.lVal, QVariantList());
+        accessible()->doAction(ClearSelection, 0, QVariantList());
+        res = accessible()->doAction(AddToSelection, varID.lVal, QVariantList());
     }
     if (flagsSelect & SELFLAG_EXTENDSELECTION)
-        res = accessible->doAction(ExtendSelection, varID.lVal, QVariantList());
+        res = accessible()->doAction(ExtendSelection, varID.lVal, QVariantList());
     if (flagsSelect & SELFLAG_ADDSELECTION)
-        res = accessible->doAction(AddToSelection, varID.lVal, QVariantList());
+        res = accessible()->doAction(AddToSelection, varID.lVal, QVariantList());
     if (flagsSelect & SELFLAG_REMOVESELECTION)
-        res = accessible->doAction(RemoveSelection, varID.lVal, QVariantList());
+        res = accessible()->doAction(RemoveSelection, varID.lVal, QVariantList());
 */
     return res ? S_OK : S_FALSE;
 }
@@ -1174,15 +1139,15 @@ HRESULT STDMETHODCALLTYPE QWindowsMsaaAccessible::accSelect(long flagsSelect, VA
 */
 HRESULT STDMETHODCALLTYPE QWindowsMsaaAccessible::get_accFocus(VARIANT *pvarID)
 {
+    QAccessibleInterface *accessible = accessibleInterface();
     accessibleDebugClientCalls(accessible);
-    if (!accessible->isValid())
+    if (!accessible)
         return E_FAIL;
 
     if (QAccessibleInterface *acc = accessible->focusChild()) {
-        if (compareAccessible(acc, accessible)) {
+        if (acc == accessible) {
             (*pvarID).vt = VT_I4;
             (*pvarID).lVal = CHILDID_SELF;
-            delete acc;
             return S_OK;
         } else {
             if (IAccessible *iface = QWindowsAccessibility::wrap(acc)) {
@@ -1191,7 +1156,6 @@ HRESULT STDMETHODCALLTYPE QWindowsMsaaAccessible::get_accFocus(VARIANT *pvarID)
                 return S_OK;
             }
         }
-        delete acc;
     }
     (*pvarID).vt = VT_EMPTY;
     return S_FALSE;
@@ -1199,8 +1163,9 @@ HRESULT STDMETHODCALLTYPE QWindowsMsaaAccessible::get_accFocus(VARIANT *pvarID)
 
 HRESULT STDMETHODCALLTYPE QWindowsMsaaAccessible::get_accSelection(VARIANT *pvarChildren)
 {
+    QAccessibleInterface *accessible = accessibleInterface();
     accessibleDebugClientCalls(accessible);
-    if (!accessible->isValid())
+    if (!accessible)
         return E_FAIL;
 
     int cc = accessible->childCount();
@@ -1211,7 +1176,6 @@ HRESULT STDMETHODCALLTYPE QWindowsMsaaAccessible::get_accSelection(VARIANT *pvar
         QAccessibleInterface *child = accessible->child(i);
         if (child) {
             isSelected = child->state().selected;
-            delete child;
         }
         if (isSelected)
             sel[selIndex++] = i+1;
@@ -1241,11 +1205,10 @@ HRESULT STDMETHODCALLTYPE QWindowsMsaaAccessible::get_accSelection(VARIANT *pvar
 HRESULT STDMETHODCALLTYPE QWindowsMsaaAccessible::GetWindow(HWND *phwnd)
 {
     *phwnd = 0;
+    QAccessibleInterface *accessible = accessibleInterface();
     accessibleDebugClientCalls(accessible);
-    if (!accessible->isValid())
+    if (!accessible)
         return E_FAIL;
-    if (!accessible->isValid())
-        return E_UNEXPECTED;
 
     QWindow *window = QWindowsAccessibility::windowHelper(accessible);
     if (!window)