Qt Reference Documentation

Link.qml Example File

demos/declarative/snake/content/Link.qml
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 import Qt 4.7
 import Qt.labs.particles 1.0

 Item { id:link
     property bool dying: false
     property bool spawned: false
     property int type: 0
     property int row: 0
     property int column: 0
     property int rotation;

     width: 40;
     height: 40

     x: margin - 3 + gridSize * column
     y: margin - 3 + gridSize * row
     Behavior on x { NumberAnimation { duration: spawned ? heartbeatInterval : 0} }
     Behavior on y { NumberAnimation { duration: spawned ? heartbeatInterval : 0 } }

     Item {
         id: img
         anchors.fill: parent
         Image {
             source: {
                 if(type == 1) {
                     "pics/blueStone.png";
                 } else if (type == 2) {
                     "pics/head.png";
                 } else {
                     "pics/redStone.png";
                 }
             }

             transform: Rotation {
                 id: actualImageRotation
                 origin.x: width/2; origin.y: height/2;
                 angle: rotation * 90
                 Behavior on angle { NumberAnimation { duration: spawned ? 200 : 0} }
             }
         }

         Image {
             source: "pics/stoneShadow.png"
         }

         opacity: 0
         Behavior on opacity { NumberAnimation { duration: 200 } }
     }

     Particles { id: particles
         width:1; height:1; anchors.centerIn: parent;
         emissionRate: 0;
         lifeSpan: 700; lifeSpanDeviation: 600;
         angle: 0; angleDeviation: 360;
         velocity: 100; velocityDeviation:30;
         source: {
             if(type == 1){
                 "pics/blueStar.png";
             } else {
                 "pics/redStar.png";
             }
         }
     }

     states: [
         State{ name: "AliveState"; when: spawned == true && dying == false
             PropertyChanges { target: img; opacity: 1 }
         },
         State{ name: "DeathState"; when: dying == true
             StateChangeScript { script: particles.burst(50); }
             PropertyChanges { target: img; opacity: 0 }
         }
     ]
 }
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