QStyleHints: Add menuSelectionWraps

This lifts QStyle::SH_Menu_SelectionWrap to Qt GUI so it
can also be honored from Qt Quick Controls.

Change-Id: I78eb2dd9fe6ad9329d40f7962bf7ad5f07dd4685
Reviewed-by: Richard Moe Gustavsen <richard.gustavsen@qt.io>

src/gui/kernel/qplatformtheme.cpp

@@ -122,6 +122,11 @@ QT_BEGIN_NAMESPACE
 
     \value ContextMenuOnMouseRelease (bool) Whether the context menu should be shown on mouse release.
 
+    \value MenuSelectionWraps (bool) Determines whether menu selection wraps. That is, whether key navigation moves
+                                     the selection to the first menu item again after the last menu item has been
+                                     reached, and vice versa.
+                                     This enum value was added in Qt 6.10.
+
     \value TouchDoubleTapDistance (int) The maximum distance in logical pixels which a touchpoint can travel
                         between taps in order for the tap sequence to be handled as a double tap.
                         The default value is double the MouseDoubleClickDistance, or 10 logical pixels
@@ -684,6 +689,8 @@ QVariant QPlatformTheme::defaultThemeHint(ThemeHint hint)
         return true;
     case PreferFileIconFromTheme:
         return false;
+    case MenuSelectionWraps:
+        return true;
     }
 
     return QVariant();

src/gui/kernel/qplatformtheme.h

@@ -99,6 +99,7 @@ public:
         UnderlineShortcut,
         ShowIconsInMenus,
         PreferFileIconFromTheme,
+        MenuSelectionWraps,
     };
     Q_ENUM(ThemeHint)
 

src/gui/kernel/qstylehints.cpp

@@ -476,6 +476,20 @@ void QStyleHints::setContextMenuTrigger(Qt::ContextMenuTrigger contextMenuTrigge
         emit contextMenuTriggerChanged(contextMenuTrigger);
 }
 
+/*!
+    \property QStyleHints::menuSelectionWraps
+    \since 6.10
+    \brief menu selection wraps around.
+
+    Returns \c true if menu selection wraps. That is, whether key navigation moves
+    the selection to the first menu item again after the last menu item has been
+    reached, and vice versa.
+*/
+bool QStyleHints::menuSelectionWraps() const
+{
+    return themeableHint(QPlatformTheme::MenuSelectionWraps).toBool();
+}
+
 /*!
     \property QStyleHints::passwordMaskDelay
     \brief the time, in milliseconds, a typed letter is displayed unshrouded

src/gui/kernel/qstylehints.h

@@ -56,6 +56,7 @@ class Q_GUI_EXPORT QStyleHints : public QObject
     Q_PROPERTY(int touchDoubleTapDistance READ touchDoubleTapDistance STORED false CONSTANT FINAL)
     Q_PROPERTY(Qt::ColorScheme colorScheme READ colorScheme WRITE setColorScheme
                RESET unsetColorScheme NOTIFY colorSchemeChanged FINAL)
+    Q_PROPERTY(bool menuSelectionWraps READ menuSelectionWraps STORED false CONSTANT FINAL REVISION(6, 10))
 
 public:
     void setMouseDoubleClickInterval(int mouseDoubleClickInterval);
@@ -84,6 +85,7 @@ public:
     void setShowShortcutsInContextMenus(bool showShortcutsInContextMenus);
     Qt::ContextMenuTrigger contextMenuTrigger() const;
     void setContextMenuTrigger(Qt::ContextMenuTrigger contextMenuTrigger);
+    bool menuSelectionWraps() const;
     int passwordMaskDelay() const;
     QChar passwordMaskCharacter() const;
     qreal fontSmoothingGamma() const;

src/plugins/platforms/cocoa/qcocoatheme.mm

@@ -466,6 +466,8 @@ QVariant QCocoaTheme::themeHint(ThemeHint hint) const
         return 1.0 / NSEvent.keyRepeatInterval;
     case QPlatformTheme::ShowIconsInMenus:
         return false;
+    case QPlatformTheme::MenuSelectionWraps:
+        return false;
     default:
         break;
     }

src/plugins/styles/mac/qmacstyle_mac.mm

@@ -2526,9 +2526,6 @@ int QMacStyle::styleHint(StyleHint sh, const QStyleOption *opt, const QWidget *w
     case SH_DialogButtonBox_ButtonsHaveIcons:
         ret = 0;
         break;
-    case SH_Menu_SelectionWrap:
-        ret = false;
-        break;
     case SH_Menu_KeyboardSearch:
         ret = true;
         break;

src/widgets/styles/qcommonstyle.cpp

@@ -5192,9 +5192,12 @@ int QCommonStyle::styleHint(StyleHint sh, const QStyleOption *opt, const QWidget
         ret = 75;
         break;
 
-    case SH_Menu_SelectionWrap:
-        ret = true;
+    case SH_Menu_SelectionWrap: {
+        const QPlatformTheme *theme = QGuiApplicationPrivate::platformTheme();
+        ret = theme ? theme->themeHint(QPlatformTheme::MenuSelectionWraps).toInt()
+                    : QPlatformTheme::defaultThemeHint(QPlatformTheme::MenuSelectionWraps).toInt();
         break;
+    }
 
     case SH_Menu_FillScreenWithScroll:
         ret = true;