Slider.qml Example File

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 import QtQuick 2.0

 Item {
     id: slider; width: 400; height: 16

     // value is read/write.
     property real value
     onValueChanged: { handle.x = 2 + (value - minimum) * slider.xMax / (maximum - minimum); }
     property real maximum: 1
     property real minimum: 1
     property int xMax: slider.width - handle.width - 4

     Rectangle {
         anchors.fill: parent
         border.color: "white"; border.width: 0; radius: 8
         gradient: Gradient {
             GradientStop { position: 0.0; color: "#66343434" }
             GradientStop { position: 1.0; color: "#66000000" }
         }
     }

     Rectangle {
         id: handle; smooth: true
         x: slider.width / 2 - handle.width / 2; y: 2; width: 30; height: slider.height-4; radius: 6
         gradient: Gradient {
             GradientStop { position: 0.0; color: "lightgray" }
             GradientStop { position: 1.0; color: "gray" }
         }

         MouseArea {
             anchors.fill: parent; drag.target: parent
             drag.axis: Drag.XAxis; drag.minimumX: 2; drag.maximumX: slider.xMax+2
             onPositionChanged: { value = (maximum - minimum) * (handle.x-2) / slider.xMax + minimum; }
         }
     }
 }