Dear Sirs and Madams!

I have following custom QML Button, named UeButton (in file UeButton.qml):
Qt Code: 
  1. import QtQuick.Controls 1.4
  2. import QtQuick.Controls.Styles 1.4
  3. import QtQuick 2.5
  4.  
  5. Button
  6. {
  7.     id: ueButton
  8.  
  9.     property string ueText
  10.  
  11.     signal ueSignalButtonClicked
  12.  
  13.     text: ueText
  14.  
  15.     style: ButtonStyle
  16.     {
  17.         background: Rectangle
  18.         {
  19.             antialiasing: true
  20.             smooth: true
  21.             gradient: Gradient
  22.             {
  23.                 GradientStop
  24.                 {
  25.                     id: ueButtonGradientStopPosition0
  26.  
  27.                     position: 0
  28.                     color: "#ffffff"
  29.                 }   // GradientStop
  30.  
  31.                 GradientStop
  32.                 {
  33.                     id: ueButtonGradientStopPosition1
  34.  
  35.                     position: 0.418
  36.                     color: "#000000"
  37.                 }   // GradientStop
  38.             }   // Gradient
  39.  
  40.             border.color: "steelblue"
  41.             border.width: 1
  42.             radius: 4
  43.         }   // background
  44.  
  45.         label: Text
  46.         {
  47.             color: "#ffffff"
  48.             font.bold: true
  49.             verticalAlignment: Text.AlignVCenter
  50.             horizontalAlignment: Text.AlignHCenter
  51.             font.pointSize: 16
  52.  
  53.             text: control.text
  54.         }   // label
  55.     }   // ButtonStyle
  56.  
  57.     MouseArea
  58.     {
  59.         id: ueButtonMouseArea
  60.  
  61.         anchors.fill: parent
  62.  
  63.         onClicked:
  64.         {
  65.             parent.clicked()
  66.             ueButton.ueSignalButtonClicked()
  67.         }
  68.     }   // MouseArea
  69. }   // ueButton
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Now, what I want is when user clicks on button, the GradientStop points gets reversed. How do I achieve this?

Sincerely,
Marko