Add QStyleHints::setMousePressAndHoldInterval()

Allows speeding up press & hold auto tests in qtquick core & controls.

Change-Id: I66717b581996977e894e3c386880ab90379abaef
Reviewed-by: Liang Qi <liang.qi@theqtcompany.com>

src/gui/kernel/qstylehints.cpp

@@ -65,13 +65,15 @@ class QStyleHintsPrivate : public QObjectPrivate
 public:
     inline QStyleHintsPrivate()
         : m_mouseDoubleClickInterval(-1)
+        , m_mousePressAndHoldInterval(-1)
         , m_startDragDistance(-1)
         , m_startDragTime(-1)
         , m_keyboardInputInterval(-1)
         , m_cursorFlashTime(-1)
         {}
 
     int m_mouseDoubleClickInterval;
+    int m_mousePressAndHoldInterval;
     int m_startDragDistance;
     int m_startDragTime;
     int m_keyboardInputInterval;
@@ -128,6 +130,21 @@ int QStyleHints::mouseDoubleClickInterval() const
            themeableHint(QPlatformTheme::MouseDoubleClickInterval, QPlatformIntegration::MouseDoubleClickInterval).toInt();
 }
 
+/*!
+    Sets the \a mousePressAndHoldInterval.
+    \internal
+    \sa mousePressAndHoldInterval()
+    \since 5.7
+*/
+void QStyleHints::setMousePressAndHoldInterval(int mousePressAndHoldInterval)
+{
+    Q_D(QStyleHints);
+    if (d->m_mousePressAndHoldInterval == mousePressAndHoldInterval)
+        return;
+    d->m_mousePressAndHoldInterval = mousePressAndHoldInterval;
+    emit mousePressAndHoldIntervalChanged(mousePressAndHoldInterval);
+}
+
 /*!
     \property QStyleHints::mousePressAndHoldInterval
     \brief the time limit in milliseconds that activates
@@ -137,7 +154,10 @@ int QStyleHints::mouseDoubleClickInterval() const
 */
 int QStyleHints::mousePressAndHoldInterval() const
 {
-    return themeableHint(QPlatformTheme::MousePressAndHoldInterval, QPlatformIntegration::MousePressAndHoldInterval).toInt();
+    Q_D(const QStyleHints);
+    return d->m_mousePressAndHoldInterval >= 0 ?
+           d->m_mousePressAndHoldInterval :
+           themeableHint(QPlatformTheme::MousePressAndHoldInterval, QPlatformIntegration::MousePressAndHoldInterval).toInt();
 }
 
 /*!

src/gui/kernel/qstylehints.h

@@ -51,7 +51,7 @@ class Q_GUI_EXPORT QStyleHints : public QObject
     Q_PROPERTY(int keyboardAutoRepeatRate READ keyboardAutoRepeatRate STORED false CONSTANT FINAL)
     Q_PROPERTY(int keyboardInputInterval READ keyboardInputInterval NOTIFY keyboardInputIntervalChanged FINAL)
     Q_PROPERTY(int mouseDoubleClickInterval READ mouseDoubleClickInterval NOTIFY mouseDoubleClickIntervalChanged FINAL)
-    Q_PROPERTY(int mousePressAndHoldInterval READ mousePressAndHoldInterval STORED false CONSTANT FINAL)
+    Q_PROPERTY(int mousePressAndHoldInterval READ mousePressAndHoldInterval NOTIFY mousePressAndHoldIntervalChanged FINAL)
     Q_PROPERTY(QChar passwordMaskCharacter READ passwordMaskCharacter STORED false CONSTANT FINAL)
     Q_PROPERTY(int passwordMaskDelay READ passwordMaskDelay STORED false CONSTANT FINAL)
     Q_PROPERTY(bool setFocusOnTouchRelease READ setFocusOnTouchRelease STORED false CONSTANT FINAL)
@@ -66,6 +66,7 @@ class Q_GUI_EXPORT QStyleHints : public QObject
 public:
     void setMouseDoubleClickInterval(int mouseDoubleClickInterval);
     int mouseDoubleClickInterval() const;
+    void setMousePressAndHoldInterval(int mousePressAndHoldInterval);
     int mousePressAndHoldInterval() const;
     void setStartDragDistance(int startDragDistance);
     int startDragDistance() const;
@@ -90,6 +91,7 @@ class Q_GUI_EXPORT QStyleHints : public QObject
     void cursorFlashTimeChanged(int cursorFlashTime);
     void keyboardInputIntervalChanged(int keyboardInputInterval);
     void mouseDoubleClickIntervalChanged(int mouseDoubleClickInterval);
+    void mousePressAndHoldIntervalChanged(int mousePressAndHoldInterval);
     void startDragDistanceChanged(int startDragDistance);
     void startDragTimeChanged(int startDragTime);