fix(InvertedMouseArea): use coding conventions

tests/ui/components/invertedMouseArea/InvertedMouseArea.qml

@@ -5,16 +5,18 @@ import QtQuick 2.0
 // ===================================================================
 
 Item {
-    property var mouseArea
+    id: item
+
+    property var _mouseArea
 
     signal pressed
 
-    function createMouseArea () {
-        if (mouseArea == null) {
-            mouseArea = builder.createObject(this)
+    function _createMouseArea () {
+        if (_mouseArea == null) {
+            _mouseArea = builder.createObject(this)
         }
 
-        mouseArea.parent = (function () {
+        _mouseArea.parent = (function () {
             // Search root.
             var p = item
 
@@ -26,14 +28,14 @@ Item {
         })()
     }
 
-    function deleteMouseArea () {
-        if (mouseArea != null) {
-            mouseArea.destroy()
-            mouseArea = null
+    function _deleteMouseArea () {
+        if (_mouseArea != null) {
+            _mouseArea.destroy()
+            _mouseArea = null
         }
     }
 
-    function isInItem (point) {
+    function _isInItem (point) {
         return (
             point.x >= item.x &&
             point.y >= item.y &&
@@ -42,13 +44,21 @@ Item {
         )
     }
 
-    id: item
+    // It's necessary to use a `enabled` variable.
+    // See: http://doc.qt.io/qt-5/qml-qtqml-component.html#completed-signal
+    //
+    // The creation order of components in a view is undefined,
+    // so the mouse area mustt be created only when `enabled == true`.
+    //
+    // In the first view render, `enabled` must equal false.
+    Component.onCompleted: enabled && _createMouseArea()
+    Component.onDestruction: _deleteMouseArea()
 
     onEnabledChanged: {
-        deleteMouseArea()
+        _deleteMouseArea()
 
         if (enabled) {
-            createMouseArea()
+            _createMouseArea()
         }
     }
 
@@ -64,7 +74,7 @@ Item {
                 // Propagate event.
                 mouse.accepted = false
 
-                if (!isInItem(
+                if (!_isInItem(
                     mapToItem(item.parent, mouse.x, mouse.y)
                 )) {
                     // Outside!!!
@@ -73,14 +83,4 @@ Item {
             }
         }
     }
-
-    // It's necessary to use a `enabled` variable.
-    // See: http://doc.qt.io/qt-5/qml-qtqml-component.html#completed-signal
-    //
-    // The creation order of components in a view is undefined,
-    // so the mouse area mustt be created only when `enabled == true`.
-    //
-    // In the first view render, `enabled` must equal false.
-    Component.onCompleted: enabled && createMouseArea()
-    Component.onDestruction: deleteMouseArea()
 }