startstop.qml Example File

particles/system/content/startstop.qml
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 import QtQuick 2.0
 import QtQuick.Particles 2.0

 Rectangle {
     width: 360
     height: 540
     color: "black"
     Text {
         text: "Left click to start/stop\nRight click to pause/unpause"
         color: "white"
         font.pixelSize: 24
     }
     MouseArea {
         anchors.fill: parent
         acceptedButtons: Qt.LeftButton | Qt.RightButton
         onClicked: {
             if (mouse.button == Qt.LeftButton)
                 particles.running = !particles.running
             else
                 particles.paused = !particles.paused;
         }
     }

     ParticleSystem {
         id: particles
         running: false
     }

     ImageParticle {
         anchors.fill: parent
         system: particles
         source: "qrc:///particleresources/star.png"
         sizeTable: "../../images/sparkleSize.png"
         alpha: 0
         colorVariation: 0.6
     }

     Emitter {
         anchors.fill: parent
         system: particles
         emitRate: 2000
         lifeSpan: 2000
         size: 30
         sizeVariation: 10
     }
 }