From c1b619559487bf3e76ecb0a91515fb9cdf6d3548 Mon Sep 17 00:00:00 2001
From: Volker Hilsheimer <volker.hilsheimer@qt.io>
Date: Tue, 18 Apr 2023 22:05:36 +0200
Subject: [PATCH 23/31] Accessibility: respect value in attached Accessible in
 controls
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QQuickItemPrivate::accessibleRole is virtual and called by the framework
to determine the role of an item. The default implementation checks and
respects a possible Accessible attached object. However, subclasses that
override the virtual don't, so the attached properties are ignored, and
the class-specific implementation wins. This makes it impossible to
change the role of e.g. a checkable button.

To fix that, move the code respecting the attached object into a non-
virtual function that the framework calls instead, and only call the
virtual member if there is no attached object, or if that object is not
initialized with a role. Replace calls to the virtual from the
framework with calls to the non-virtual wrapper.

Do this for both QQuickItem and for QQuickPopup, and adjust the logic
in QQuickControl types that create an attached object and initialize
it's role when accessibility becomes active. Use the non-overridable
effective role value for that as well.

Add a test case, and to avoid any new framework calls to the virtual,
make it private.

Fixes: QTBUG-110114
Pick-to: 6.5 6.2
Change-Id: Ia709cecbd181b6d8ee3297a4af60c1e7db9a2c51
Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org>
Reviewed-by: Jan Arve Sæther <jan-arve.saether@qt.io>
(cherry picked from commit 3c08d08ae2bbd449cc0579a1b3cb499383c7a60c)
---
 src/quick/accessible/qaccessiblequickitem.cpp |  2 +-
 src/quick/items/qquickitem.cpp                | 17 ++++++++++++-----
 src/quick/items/qquickitem_p.h                |  3 +++
 3 files changed, 16 insertions(+), 6 deletions(-)

diff --git a/src/quick/accessible/qaccessiblequickitem.cpp b/src/quick/accessible/qaccessiblequickitem.cpp
index a8df58d450..99e6eff7c3 100644
--- a/src/quick/accessible/qaccessiblequickitem.cpp
+++ b/src/quick/accessible/qaccessiblequickitem.cpp
@@ -230,7 +230,7 @@ QAccessible::Role QAccessibleQuickItem::role() const
 
     QAccessible::Role role = QAccessible::NoRole;
     if (item())
-        role = QQuickItemPrivate::get(item())->accessibleRole();
+        role = QQuickItemPrivate::get(item())->effectiveAccessibleRole();
     if (role == QAccessible::NoRole) {
         if (qobject_cast<QQuickText*>(const_cast<QQuickItem *>(item())))
             role = QAccessible::StaticText;
diff --git a/src/quick/items/qquickitem.cpp b/src/quick/items/qquickitem.cpp
index c370d6e5c3..9e8b289376 100644
--- a/src/quick/items/qquickitem.cpp
+++ b/src/quick/items/qquickitem.cpp
@@ -2400,7 +2400,7 @@ bool QQuickItemPrivate::canAcceptTabFocus(QQuickItem *item)
         return true;
 
 #if QT_CONFIG(accessibility)
-    QAccessible::Role role = QQuickItemPrivate::get(item)->accessibleRole();
+    QAccessible::Role role = QQuickItemPrivate::get(item)->effectiveAccessibleRole();
     if (role == QAccessible::EditableText || role == QAccessible::Table || role == QAccessible::List) {
         return true;
     } else if (role == QAccessible::ComboBox || role == QAccessible::SpinBox) {
@@ -9000,13 +9000,20 @@ QQuickItemPrivate::ExtraData::ExtraData()
 
 
 #if QT_CONFIG(accessibility)
-QAccessible::Role QQuickItemPrivate::accessibleRole() const
+QAccessible::Role QQuickItemPrivate::effectiveAccessibleRole() const
 {
     Q_Q(const QQuickItem);
-    QQuickAccessibleAttached *accessibleAttached = qobject_cast<QQuickAccessibleAttached *>(qmlAttachedPropertiesObject<QQuickAccessibleAttached>(q, false));
-    if (accessibleAttached)
-        return accessibleAttached->role();
+    auto *attached = qmlAttachedPropertiesObject<QQuickAccessibleAttached>(q, false);
+    auto role = QAccessible::NoRole;
+    if (auto *accessibleAttached = qobject_cast<QQuickAccessibleAttached *>(attached))
+        role = accessibleAttached->role();
+    if (role == QAccessible::NoRole)
+        role = accessibleRole();
+    return role;
+}
 
+QAccessible::Role QQuickItemPrivate::accessibleRole() const
+{
     return QAccessible::NoRole;
 }
 #endif
diff --git a/src/quick/items/qquickitem_p.h b/src/quick/items/qquickitem_p.h
index ade8fb61f2..6f329bd119 100644
--- a/src/quick/items/qquickitem_p.h
+++ b/src/quick/items/qquickitem_p.h
@@ -575,7 +575,10 @@ public:
     virtual void implicitHeightChanged();
 
 #if QT_CONFIG(accessibility)
+    QAccessible::Role effectiveAccessibleRole() const;
+private:
     virtual QAccessible::Role accessibleRole() const;
+public:
 #endif
 
     void setImplicitAntialiasing(bool antialiasing);
-- 
2.43.0