Qt 5.6 | Qt Quick | QML Advanced Tutorial 4 - Finishing Touches | BoomBlock.qml Example File

Qt 5.6.2 Reference Documentation

# BoomBlock.qml Example File

tutorials/samegame/samegame4/content/BoomBlock.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
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      **     from this software without specific prior written permission.
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      import QtQuick 2.0
      import QtQuick.Particles 2.0

      Item {
          id: block

          property int type: 0
          property bool dying: false

          property bool spawned: false

          Behavior on x {
              enabled: spawned;
              SpringAnimation{ spring: 2; damping: 0.2 }
          }
          Behavior on y {
              SpringAnimation{ spring: 2; damping: 0.2 }
          }

          Image {
              id: img

              anchors.fill: parent
              source: {
                  if (type == 0)
                      return "../../shared/pics/redStone.png";
                  else if (type == 1)
                      return "../../shared/pics/blueStone.png";
                  else
                      return "../../shared/pics/greenStone.png";
              }
              opacity: 0

              Behavior on opacity {
                  NumberAnimation { properties:"opacity"; duration: 200 }
              }
          }

          ParticleSystem {
              id: sys
              anchors.centerIn: parent
              ImageParticle {
                  // ![0]
                  source: {
                      if (type == 0)
                          return "../../shared/pics/redStar.png";
                      else if (type == 1)
                          return "../../shared/pics/blueStar.png";
                      else
                          return "../../shared/pics/greenStar.png";
                  }
                  rotationVelocityVariation: 360
                  // ![0]
              }

              Emitter {
                  id: particles
                  anchors.centerIn: parent
                  emitRate: 0
                  lifeSpan: 700
                  velocity: AngleDirection {angleVariation: 360; magnitude: 80; magnitudeVariation: 40}
                  size: 16
              }
          }

          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 }
                  StateChangeScript { script: block.destroy(1000); }
              }
          ]
      }