demo.qml Example File | Qt Quick 5.5

- Qt 5.5
- Qt Quick
- QQuickRenderControl Example
- demo.qml Example File
- Qt 5.5.1 Reference Documentation

# demo.qml Example File

rendercontrol/demo.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.
    **
    ** $QT_BEGIN_LICENSE:LGPL21$
    ** Commercial License Usage
    ** Licensees holding valid commercial Qt licenses may use this file in
    ** accordance with the commercial license agreement provided with the
    ** Software or, alternatively, in accordance with the terms contained in
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    ** information use the contact form at http://www.qt.io/contact-us.
    **
    ** GNU Lesser General Public License Usage
    ** Alternatively, this file may be used under the terms of the GNU Lesser
    ** General Public License version 2.1 or version 3 as published by the Free
    ** Software Foundation and appearing in the file LICENSE.LGPLv21 and
    ** LICENSE.LGPLv3 included in the packaging of this file. Please review the
    ** following information to ensure the GNU Lesser General Public License
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    ** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
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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
        }
    }