Index: sources/gui/qml/components/RangeRect.qml
===================================================================
diff -u -r905fde2f9211f492828b746b615750b5ae84d4de -r43ffdd5ca0998f06d28b6adeee231a6eec7e7150
--- sources/gui/qml/components/RangeRect.qml	(.../RangeRect.qml)	(revision 905fde2f9211f492828b746b615750b5ae84d4de)
+++ sources/gui/qml/components/RangeRect.qml	(.../RangeRect.qml)	(revision 43ffdd5ca0998f06d28b6adeee231a6eec7e7150)
@@ -41,7 +41,8 @@
 
     property string unit    : ""
 
-    property real   touchMargin: 0
+    property real   touchMargin         : 0
+    property real   leftRightTouchMargin: 0
 
     width   : parent.width
     height  : parent.height
@@ -84,10 +85,15 @@
     }
 
     MouseArea { id: _mouseArea
-        // Expand the touch area by all edges of the _root item
-        anchors.margins    : -touchMargin
+        anchors.bottomMargin    : -touchMargin
+        anchors.topMargin       : -touchMargin
 
+        anchors.leftMargin      : -leftRightTouchMargin
+        anchors.rightMargin     : -leftRightTouchMargin
+
+        anchors.centerIn: parent
         anchors.fill: parent
+
         onPositionChanged: {
             _root.dragged(mouse)
         }