dynamiccomparison.qml Example File

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  import QtQuick 2.0
  import QtQuick.Particles 2.0

  Rectangle {
      id: root
      color: "black"
      width: 640
      height: 480
      ParticleSystem {
          id: sys
      }

      ImageParticle {
          system: sys
          source: "qrc:///particleresources/glowdot.png"
          color: "white"
          colorVariation: 1.0
          alpha: 0.1
          entryEffect: ImageParticle.None
      }

      Emitter {
          id: emitter
          system: sys
          width: parent.width/2
          velocity: PointDirection {y: 72; yVariation: 24}
          lifeSpan: 10000
          emitRate: 1000
          enabled: false
          size: 32
      }

      Item {
          id: fakeEmitter
          function burst(number) {
              while (number > 0) {
                  var item = fakeParticle.createObject(root);
                  item.lifeSpan = Math.random() * 5000 + 5000;
                  item.x = Math.random() * (root.width/2) + (root.width/2);
                  item.y = 0;
                  number--;
              }
          }

          Component {
              id: fakeParticle
              Image {
                  id: container
                  property int lifeSpan: 10000
                  width: 32
                  height: 32
                  source: "qrc:///particleresources/glowdot.png"
                  y: 0
                  PropertyAnimation on y {from: -16; to: root.height-16; duration: container.lifeSpan; running: true}
                  SequentialAnimation on opacity {
                      running: true
                      NumberAnimation { from:0; to: 1; duration: 500}
                      PauseAnimation { duration: container.lifeSpan - 1000}
                      NumberAnimation { from:1; to: 0; duration: 500}
                      ScriptAction { script: container.destroy(); }
                  }
              }
          }
      }

      //Hooked to a timer, but click for extra bursts that really stress performance
      Timer {
          interval: 10000
          triggeredOnStart: true
          repeat: true
          running: true
          onTriggered: {
              emitter.burst(1000);
              fakeEmitter.burst(1000);
          }
      }
      Text {
          anchors.left: parent.left
          anchors.bottom: parent.bottom
          text: "1000 particles"
          color: "white"
          MouseArea {
              anchors.fill: parent
              onClicked: emitter.burst(1000);
          }
      }
      Text {
          anchors.right: parent.right
          anchors.bottom: parent.bottom
          text: "1000 items"
          color: "white"
          MouseArea {
              anchors.fill: parent
              onClicked: fakeEmitter.burst(1000);
          }
      }
  }