Enemy.qml Example File

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 import QtQuick 1.0

 Image {
     id: enemy
     objectName: "enemy"
     smooth:true
     opacity: 0 // 0=hidden by default
     fillMode:Image.PreserveAspectFit
     source:"file:/"+LevelPlugin.pictureRootPath()+"enemy1.png"

     property int enemySpeed: LevelPlugin.enemySpeed()

     function pause(doPause) {
         if (doPause) {
             upToDownAnim.pause()
             rightLeftAnim.pause()
         } else {
             upToDownAnim.resume()
             rightLeftAnim.resume()
         }
     }

     function startMovingAnim() {
         upToDownAnim.restart()
         rightLeftAnim.restart()
     }

     // Right-left animation
     SequentialAnimation {
     id: rightLeftAnim
     loops: Animation.Infinite
     NumberAnimation { target:enemy; property:"x";
     to:gameArea.width - enemy.width; easing.type: Easing.OutQuad; duration: 3000 }
     NumberAnimation { target:enemy; property:"x"; to:0; easing.type: Easing.OutQuad; duration: 3000 }
     }

     // Up to down animation
     SequentialAnimation {
     id: upToDownAnim
     PropertyAnimation { target:enemy; property:"y"; to: gameArea.height;
         easing.type: Easing.Linear; duration: enemy.enemySpeed }
     PropertyAction { target: enemy; properties: "opacity"; value: 0 }
     }
 }