Qt 5.8 | Qt Quick | Qt Quick Particles Examples - Emitters | burstandpulse.qml Example File

Qt 5.8.0 Reference Documentation

# burstandpulse.qml Example File

particles/emitters/content/burstandpulse.qml

      /****************************************************************************
      **
      ** Copyright (C) 2015 The Qt Company Ltd.
      ** Contact: http://www.qt.io/licensing/
      **
      ** This file is part of the examples of the Qt Toolkit.
      **
      ** $QT_BEGIN_LICENSE:BSD$
      ** You may use this file under the terms of the BSD license as follows:
      **
      ** "Redistribution and use in source and binary forms, with or without
      ** modification, are permitted provided that the following conditions are
      ** met:
      **   * Redistributions of source code must retain the above copyright
      **     notice, this list of conditions and the following disclaimer.
      **   * Redistributions in binary form must reproduce the above copyright
      **     notice, this list of conditions and the following disclaimer in
      **     the documentation and/or other materials provided with the
      **     distribution.
      **   * Neither the name of The Qt Company Ltd nor the names of its
      **     contributors may be used to endorse or promote products derived
      **     from this software without specific prior written permission.
      **
      **
      ** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
      ** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
      ** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
      ** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
      ** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
      ** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
      ** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
      ** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
      ** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
      ** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
      ** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
      **
      ** $QT_END_LICENSE$
      **
      ****************************************************************************/

      import QtQuick 2.0
      import QtQuick.Particles 2.0

      Rectangle {
          width: 320
          height: 480
          color: "black"
          property bool lastWasPulse: false
          Timer {
              interval: 3500
              triggeredOnStart: true
              running: true
              repeat: true
              onTriggered: {
                  if (lastWasPulse) {
                      burstEmitter.burst(500);
                      lastWasPulse = false;
                  } else {
                      pulseEmitter.pulse(500);
                      lastWasPulse = true;
                  }
              }
          }
          ParticleSystem {
              id: particles
              anchors.fill: parent
              ImageParticle {
                  source: "qrc:///particleresources/star.png"
                  alpha: 0
                  colorVariation: 0.6
              }

              Emitter {
                  id: burstEmitter
                  x: parent.width/2
                  y: parent.height/3
                  emitRate: 1000
                  lifeSpan: 2000
                  enabled: false
                  velocity: AngleDirection{magnitude: 64; angleVariation: 360}
                  size: 24
                  sizeVariation: 8
                  Text {
                      anchors.centerIn: parent
                      color: "white"
                      font.pixelSize: 18
                      text: "Burst"
                  }
              }
              Emitter {
                  id: pulseEmitter
                  x: parent.width/2
                  y: 2*parent.height/3
                  emitRate: 1000
                  lifeSpan: 2000
                  enabled: false
                  velocity: AngleDirection{magnitude: 64; angleVariation: 360}
                  size: 24
                  sizeVariation: 8
                  Text {
                      anchors.centerIn: parent
                      color: "white"
                      font.pixelSize: 18
                      text: "Pulse"
                  }
              }
          }
      }