Qt Reference Documentation

Dial.qml Example File

declarative/ui-components/dialcontrol/content/Dial.qml
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 import Qt 4.7

 Item {
     id: root
     property real value : 0

     width: 210; height: 210

     Image { source: "background.png" }

     Image {
         x: 96
         y: 35
         source: "needle_shadow.png"
         transform: Rotation {
             origin.x: 9; origin.y: 67
             angle: needleRotation.angle
         }
     }
     Image {
         id: needle
         x: 98; y: 33
         smooth: true
         source: "needle.png"
         transform: Rotation {
             id: needleRotation
             origin.x: 5; origin.y: 65
             //! [needle angle]
             angle: Math.min(Math.max(-130, root.value*2.6 - 130), 133)
             Behavior on angle {
                 SpringAnimation {
                     spring: 1.4
                     damping: .15
                 }
             }
             //! [needle angle]
         }
     }
     Image { x: 21; y: 18; source: "overlay.png" }
 }
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