demo.qml Example File | Qt Quick 5.9

Qt 5.9 | Qt Quick | QQuickRenderControl Example | demo.qml Example File

Qt 5.9.2 Reference Documentation

# demo.qml Example File

rendercontrol/demo.qml

      /****************************************************************************
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      ** Copyright (C) 2016 The Qt Company Ltd.
      ** Contact: https://www.qt.io/licensing/
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      ** This file is part of the examples of the Qt Toolkit.
      **
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      ** Alternatively, you may use this file under the terms of the BSD license
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      import QtQuick 2.0
      import QtQuick.Particles 2.0

      Rectangle {
          id: root

          gradient: Gradient {
              GradientStop { position: 0; color: mouse.pressed ? "lightsteelblue" : "steelblue" }
              GradientStop { position: 1; color: "black" }
          }

          Text {
              anchors.centerIn: parent
              text: "Qt Quick in a texture"
              font.pointSize: 40
              color: "white"

              SequentialAnimation on rotation {
                  PauseAnimation { duration: 2500 }
                  NumberAnimation { from: 0; to: 360; duration: 5000; easing.type: Easing.InOutCubic }
                  loops: Animation.Infinite
              }
          }

          ParticleSystem {
              id: particles
              anchors.fill: parent

              ImageParticle {
                  id: smoke
                  system: particles
                  anchors.fill: parent
                  groups: ["A", "B"]
                  source: "qrc:///particleresources/glowdot.png"
                  colorVariation: 0
                  color: "#00111111"
              }
              ImageParticle {
                  id: flame
                  anchors.fill: parent
                  system: particles
                  groups: ["C", "D"]
                  source: "qrc:///particleresources/glowdot.png"
                  colorVariation: 0.1
                  color: "#00ff400f"
              }

              Emitter {
                  id: fire
                  system: particles
                  group: "C"

                  y: parent.height
                  width: parent.width

                  emitRate: 350
                  lifeSpan: 3500

                  acceleration: PointDirection { y: -17; xVariation: 3 }
                  velocity: PointDirection {xVariation: 3}

                  size: 24
                  sizeVariation: 8
                  endSize: 4
              }

              TrailEmitter {
                  id: fireSmoke
                  group: "B"
                  system: particles
                  follow: "C"
                  width: root.width
                  height: root.height - 68

                  emitRatePerParticle: 1
                  lifeSpan: 2000

                  velocity: PointDirection {y:-17*6; yVariation: -17; xVariation: 3}
                  acceleration: PointDirection {xVariation: 3}

                  size: 36
                  sizeVariation: 8
                  endSize: 16
              }

              TrailEmitter {
                  id: fireballFlame
                  anchors.fill: parent
                  system: particles
                  group: "D"
                  follow: "E"

                  emitRatePerParticle: 120
                  lifeSpan: 180
                  emitWidth: TrailEmitter.ParticleSize
                  emitHeight: TrailEmitter.ParticleSize
                  emitShape: EllipseShape{}

                  size: 16
                  sizeVariation: 4
                  endSize: 4
              }

              TrailEmitter {
                  id: fireballSmoke
                  anchors.fill: parent
                  system: particles
                  group: "A"
                  follow: "E"

                  emitRatePerParticle: 128
                  lifeSpan: 2400
                  emitWidth: TrailEmitter.ParticleSize
                  emitHeight: TrailEmitter.ParticleSize
                  emitShape: EllipseShape{}

                  velocity: PointDirection {yVariation: 16; xVariation: 16}
                  acceleration: PointDirection {y: -16}

                  size: 24
                  sizeVariation: 8
                  endSize: 8
              }

              Emitter {
                  id: balls
                  system: particles
                  group: "E"

                  y: parent.height
                  width: parent.width

                  emitRate: 2
                  lifeSpan: 7000

                  velocity: PointDirection {y:-17*4*2; xVariation: 6*6}
                  acceleration: PointDirection {y: 17*2; xVariation: 6*6}

                  size: 8
                  sizeVariation: 4
              }

              Turbulence { //A bit of turbulence makes the smoke look better
                  anchors.fill: parent
                  groups: ["A","B"]
                  strength: 32
                  system: particles
              }
          }

          onWidthChanged: particles.reset()
          onHeightChanged: particles.reset()

          MouseArea {
              id: mouse
              anchors.fill: parent
          }
      }