Qt Code: 
  1. import QtQuick 2.0
  2.  
  3. Item
  4. {
  5.     width: 660
  6.     height: 660
  7.  
  8.     Rectangle
  9.     {
  10.         id : dial
  11.         width: 360
  12.         height: 360
  13.  
  14.         color: "gray"
  15.  
  16.         Rectangle
  17.         {
  18.             id: dot
  19.             height: 5
  20.             width: 5
  21.             color: "red"
  22.             x: dial.x + (dial.width/2);
  23.             y: dial.y + (dial.height/2);
  24.         }
  25.  
  26.         Image
  27.         {
  28.             id: line
  29.             source: "/home/.../documents/test/straightLine.jpg"
  30.             height: 50
  31.             width: 50
  32.             anchors.horizontalCenter: parent.horizontalCenter
  33.             anchors.verticalCenter: parent.verticalCenter
  34.             transform: Rotation
  35.             {
  36.                 origin.x: dial.x + (dial.width/2);
  37.                 origin.y: dial.y + (dial.height/2);
  38.                 angle: 40
  39.             }
  40.         }
  41.     }
  42. }
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The dot is a representation of the origin point. The line's center point should stay at that origin.

When I apply the angle : 40, the line moves away from its origin.

How to tell it to say at that origin while rotating?