Cocoa: added queryKeyboardModifiers() in platform plugin

Task-number: QTBUG-37181
Change-Id: I9256d0c9b83d6e5982864dc747586cbe2322b60c
Reviewed-by: Morten Johan Sørvig <morten.sorvig@digia.com>

src/plugins/platforms/cocoa/qcocoaintegration.h

@@ -129,6 +129,7 @@ public:
     QCocoaServices *services() const;
     QVariant styleHint(StyleHint hint) const;
 
+    Qt::KeyboardModifiers queryKeyboardModifiers() const;
     QList<int> possibleKeys(const QKeyEvent *event) const;
 
     void updateScreens();

src/plugins/platforms/cocoa/qcocoaintegration.mm

@@ -464,6 +464,11 @@ QVariant QCocoaIntegration::styleHint(StyleHint hint) const
     return QPlatformIntegration::styleHint(hint);
 }
 
+Qt::KeyboardModifiers QCocoaIntegration::queryKeyboardModifiers() const
+{
+    return QCocoaKeyMapper::queryKeyboardModifiers();
+}
+
 QList<int> QCocoaIntegration::possibleKeys(const QKeyEvent *event) const
 {
     return mKeyboardMapper->possibleKeys(event);

src/plugins/platforms/cocoa/qcocoakeymapper.h

@@ -83,6 +83,7 @@ class QCocoaKeyMapper
 public:
     QCocoaKeyMapper();
     ~QCocoaKeyMapper();
+    static Qt::KeyboardModifiers queryKeyboardModifiers();
     QList<int> possibleKeys(const QKeyEvent *event) const;
     bool updateKeyboard();
     void deleteLayouts();

src/plugins/platforms/cocoa/qcocoakeymapper.mm

@@ -346,6 +346,11 @@ QCocoaKeyMapper::~QCocoaKeyMapper()
     deleteLayouts();
 }
 
+Qt::KeyboardModifiers QCocoaKeyMapper::queryKeyboardModifiers()
+{
+    return qt_mac_get_modifiers(GetCurrentEventKeyModifiers());
+}
+
 bool QCocoaKeyMapper::updateKeyboard()
 {
     const UCKeyboardLayout *uchrData = 0;