Fix some duplication between QGuiApplication and QApplication,

for the mouseButtons and keyboardModifiers vars and methods.
Implement queryKeyboardModifiers with a new virtual in
QPlatformIntegration.

Task-number: QTBUG-11243
Change-Id: I9e95841542ac61c73ff72d7682ad962ea8aada42
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@nokia.com>
Reviewed-by: Samuel Rødal <samuel.rodal@nokia.com>

src/gui/kernel/qguiapplication.cpp

@@ -753,7 +753,17 @@ static QClipboard *clipboard();
 #endif
 
 /*!
-    Returns the currently held keyboard modifiers.
+    Returns the current state of the modifier keys on the keyboard. The current
+    state is updated sychronously as the event queue is emptied of events that
+    will spontaneously change the keyboard state (QEvent::KeyPress and
+    QEvent::KeyRelease events).
+
+    It should be noted this may not reflect the actual keys held on the input
+    device at the time of calling but rather the modifiers as last reported in
+    one of the above events. If no keys are being held Qt::NoModifier is
+    returned.
+
+    \sa mouseButtons(), queryKeyboardModifiers()
 */
 Qt::KeyboardModifiers QGuiApplication::keyboardModifiers()
 {
@@ -761,7 +771,39 @@ Qt::KeyboardModifiers QGuiApplication::keyboardModifiers()
 }
 
 /*!
-    Returns the currently held mouse buttons.
+    \fn Qt::KeyboardModifiers QApplication::queryKeyboardModifiers()
+
+    Queries and returns the state of the modifier keys on the keyboard.
+    Unlike keyboardModifiers, this method returns the actual keys held
+    on the input device at the time of calling the method.
+
+    It does not rely on the keypress events having been received by this
+    process, which makes it possible to check the modifiers while moving
+    a window, for instance. Note that in most cases, you should use
+    keyboardModifiers(), which is faster and more accurate since it contains
+    the state of the modifiers as they were when the currently processed
+    event was received.
+
+    \sa keyboardModifiers()
+*/
+Qt::KeyboardModifiers QGuiApplication::queryKeyboardModifiers()
+{
+    QPlatformIntegration *pi = QGuiApplicationPrivate::platformIntegration();
+    return pi->queryKeyboardModifiers();
+}
+
+/*!
+    Returns the current state of the buttons on the mouse. The current state is
+    updated syncronously as the event queue is emptied of events that will
+    spontaneously change the mouse state (QEvent::MouseButtonPress and
+    QEvent::MouseButtonRelease events).
+
+    It should be noted this may not reflect the actual buttons held on the
+    input device at the time of calling but rather the mouse buttons as last
+    reported in one of the above events. If no mouse buttons are being held
+    Qt::NoButton is returned.
+
+    \sa keyboardModifiers()
 */
 Qt::MouseButtons QGuiApplication::mouseButtons()
 {

src/gui/kernel/qguiapplication.h

@@ -113,6 +113,7 @@ public:
     static void setPalette(const QPalette &pal);
 
     static Qt::KeyboardModifiers keyboardModifiers();
+    static Qt::KeyboardModifiers queryKeyboardModifiers();
     static Qt::MouseButtons mouseButtons();
 
     static void setLayoutDirection(Qt::LayoutDirection direction);

src/gui/kernel/qplatformintegration_qpa.cpp

@@ -291,6 +291,11 @@ QVariant QPlatformIntegration::styleHint(StyleHint hint) const
     return 0;
 }
 
+Qt::KeyboardModifiers QPlatformIntegration::queryKeyboardModifiers() const
+{
+    return QGuiApplication::keyboardModifiers();
+}
+
 /*!
   Should be called by the implementation whenever a new screen is added.
 

src/gui/kernel/qplatformintegration_qpa.h

@@ -124,6 +124,8 @@ public:
 
     virtual QVariant styleHint(StyleHint hint) const;
 
+    virtual Qt::KeyboardModifiers queryKeyboardModifiers() const;
+
     virtual QPlatformTheme *platformTheme() const;
 
 protected:

src/widgets/kernel/qapplication.cpp

@@ -371,9 +371,6 @@ void qt_init(QApplicationPrivate *priv, int type
    );
 void qt_cleanup();
 
-Qt::MouseButtons QApplicationPrivate::mouse_buttons = Qt::NoButton;
-Qt::KeyboardModifiers QApplicationPrivate::modifier_buttons = Qt::NoModifier;
-
 QStyle *QApplicationPrivate::app_style = 0;        // default application style
 QString QApplicationPrivate::styleOverride;        // style override
 
@@ -2665,68 +2662,6 @@ QDesktopWidget *QApplication::desktop()
     return qt_desktopWidget;
 }
 
-/*!
-    Returns the current state of the modifier keys on the keyboard. The current
-    state is updated sychronously as the event queue is emptied of events that
-    will spontaneously change the keyboard state (QEvent::KeyPress and
-    QEvent::KeyRelease events).
-
-    It should be noted this may not reflect the actual keys held on the input
-    device at the time of calling but rather the modifiers as last reported in
-    one of the above events. If no keys are being held Qt::NoModifier is
-    returned.
-
-    \sa mouseButtons(), queryKeyboardModifiers()
-*/
-
-Qt::KeyboardModifiers QApplication::keyboardModifiers()
-{
-    return QApplicationPrivate::modifier_buttons;
-}
-
-/*!
-    \fn Qt::KeyboardModifiers QApplication::queryKeyboardModifiers()
-
-    Queries and returns the state of the modifier keys on the keyboard.
-    Unlike keyboardModifiers, this method returns the actual keys held
-    on the input device at the time of calling the method.
-
-    It does not rely on the keypress events having been received by this
-    process, which makes it possible to check the modifiers while moving
-    a window, for instance. Note that in most cases, you should use
-    keyboardModifiers(), which is faster and more accurate since it contains
-    the state of the modifiers as they were when the currently processed
-    event was received.
-
-    \sa keyboardModifiers()
-
-    \since 4.8
-*/
-
-Qt::KeyboardModifiers QApplication::queryKeyboardModifiers()
-{
-    qWarning("queryKeyboardModifiers() doesn't have a QPA implementation");
-    return QApplicationPrivate::modifier_buttons;
-}
-
-/*!
-    Returns the current state of the buttons on the mouse. The current state is
-    updated syncronously as the event queue is emptied of events that will
-    spontaneously change the mouse state (QEvent::MouseButtonPress and
-    QEvent::MouseButtonRelease events).
-
-    It should be noted this may not reflect the actual buttons held on the
-    input device at the time of calling but rather the mouse buttons as last
-    reported in one of the above events. If no mouse buttons are being held
-    Qt::NoButton is returned.
-
-    \sa keyboardModifiers()
-*/
-
-Qt::MouseButtons QApplication::mouseButtons()
-{
-    return QApplicationPrivate::mouse_buttons;
-}
 
 /*!
     \fn bool QApplication::isSessionRestored() const

src/widgets/kernel/qapplication.h

@@ -150,10 +150,6 @@ public:
     static void beep();
     static void alert(QWidget *widget, int duration = 0);
 
-    static Qt::KeyboardModifiers keyboardModifiers();
-    static Qt::KeyboardModifiers queryKeyboardModifiers();
-    static Qt::MouseButtons mouseButtons();
-
     static void setCursorFlashTime(int);
     static int cursorFlashTime();
 

src/widgets/kernel/qapplication_p.h

@@ -247,9 +247,6 @@ public:
     QPoint toolTipPos, toolTipGlobalPos, hoverGlobalPos;
     QPointer<QWidget> toolTipWidget;
 
-    static Qt::MouseButtons mouse_buttons;
-    static Qt::KeyboardModifiers modifier_buttons;
-
     static QSize app_strut;
     static QWidgetList *popupWidgets;
     static QStyle *app_style;