feat(settings/touchpad): add natural scrolling

settings-daemon/touchpad/com.cutefish.Touchpad.xml

@@ -4,6 +4,7 @@
     <property name="available" type="b" access="read"/>
     <property name="enabled" type="b" access="read"/>
     <property name="tapToClick" type="b" access="read"/>
+    <property name="naturalScroll" type="b" access="read"/>
     <property name="pointerAcceleration" type="d" access="read"/>
 
     <method name="setEnabled">
@@ -14,6 +15,10 @@
       <arg name="enabled" type="b" direction="in"/>
     </method>
 
+    <method name="setNaturalScroll">
+      <arg name="enabled" type="b" direction="in"/>
+    </method>
+
     <method name="setPointerAcceleration">
       <arg name="value" type="d" direction="in"/>
     </method>

settings-daemon/touchpad/touchpadmanager.cpp

@@ -42,6 +42,17 @@ void TouchpadManager::setTapToClick(bool value)
     m_backend->applyConfig();
 }
 
+bool TouchpadManager::naturalScroll() const
+{
+    return m_backend->naturalScroll();
+}
+
+void TouchpadManager::setNaturalScroll(bool naturalScroll)
+{
+    m_backend->setNaturalScroll(naturalScroll);
+    m_backend->applyConfig();
+}
+
 qreal TouchpadManager::pointerAcceleration() const
 {
     return m_backend->pointerAcceleration();

settings-daemon/touchpad/touchpadmanager.h

@@ -10,6 +10,7 @@ class TouchpadManager : public QObject
     Q_PROPERTY(bool available READ available CONSTANT)
     Q_PROPERTY(bool enabled READ enabled WRITE setEnabled CONSTANT)
     Q_PROPERTY(bool tapToClick READ tapToClick WRITE setTapToClick CONSTANT)
+    Q_PROPERTY(bool naturalScroll READ naturalScroll WRITE setNaturalScroll CONSTANT)
     Q_PROPERTY(qreal pointerAcceleration READ pointerAcceleration WRITE setPointerAcceleration CONSTANT)
 
 public:
@@ -23,6 +24,9 @@ public:
     bool tapToClick() const;
     void setTapToClick(bool value);
 
+    bool naturalScroll() const;
+    void setNaturalScroll(bool naturalScroll);
+
     qreal pointerAcceleration() const;
     void setPointerAcceleration(qreal value);
 

settings-daemon/touchpad/x11/xlibbackend.cpp

@@ -225,6 +225,26 @@ void XlibBackend::setTapToClick(bool enabled)
     object->setTapToClick(enabled);
 }
 
+bool XlibBackend::naturalScroll()
+{
+    LibinputTouchpad *object = dynamic_cast<LibinputTouchpad *>(m_device.data());
+
+    if (!object)
+        return false;
+
+    return object->isNaturalScroll();
+}
+
+void XlibBackend::setNaturalScroll(bool value)
+{
+    LibinputTouchpad *object = dynamic_cast<LibinputTouchpad *>(m_device.data());
+
+    if (!object)
+        return;
+
+    object->setNaturalScroll(value);
+}
+
 qreal XlibBackend::pointerAcceleration()
 {
     LibinputTouchpad *object = dynamic_cast<LibinputTouchpad *>(m_device.data());

settings-daemon/touchpad/x11/xlibbackend.h

@@ -73,6 +73,9 @@ public:
     bool tapToClick();
     void setTapToClick(bool enabled);
 
+    bool naturalScroll();
+    void setNaturalScroll(bool value);
+
     qreal pointerAcceleration();
     void setPointerAcceleration(qreal value);