/****************************************************************************
**
** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** 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:
**
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** modification, are permitted provided that the following conditions are
** met:
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**     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.
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**     of its contributors may be used to endorse or promote products derived
**     from this software without specific prior written permission.
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** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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import QtQuick 2.0
import QtQuick.Particles 2.0

Rectangle {
    id: root
    color: "black"
    width: 640
    height: 480
    ParticleSystem {
        id: sys
    }
    ImageParticle {
        system: sys
        source: "qrc:///particleresources/glowdot.png"
        color: "white"
        colorVariation: 1.0
        alpha: 0.1
    }

    Component {
        id: emitterComp
        Emitter {
            id: container
            Emitter {
                id: emitMore
                system: sys
                emitRate: 128
                lifeSpan: 600
                size: 16
                endSize: 8
                velocity: AngleDirection {angleVariation:360; magnitude: 60}
            }

            property int life: 2600
            property real targetX: 0
            property real targetY: 0
            function go() {
                xAnim.start();
                yAnim.start();
                container.enabled = true
            }
            system: sys
            emitRate: 32
            lifeSpan: 600
            size: 24
            endSize: 8
            NumberAnimation on x {
                id: xAnim;
                to: targetX
                duration: life
                running: false
            }
            NumberAnimation on y {
                id: yAnim;
                to: targetY
                duration: life
                running: false
            }
            Timer {
                interval: life
                running: true
                onTriggered: container.destroy();
            }
        }
    }

    function customEmit(x,y) {
        for (var i=0; i<8; i++) {
            var obj = emitterComp.createObject(root);
            obj.x = x
            obj.y = y
            obj.targetX = Math.random() * 240 - 120 + obj.x
            obj.targetY = Math.random() * 240 - 120 + obj.y
            obj.life = Math.round(Math.random() * 2400) + 200
            obj.emitRate = Math.round(Math.random() * 32) + 32
            obj.go();
        }
    }

    Timer {
        interval: 10000
        triggeredOnStart: true
        running: true
        repeat: true
        onTriggered: customEmit(Math.random() * 320, Math.random() * 480)
    }
    MouseArea {
        anchors.fill: parent
        onClicked: customEmit(mouse.x, mouse.y);
    }

    Text {
        anchors.horizontalCenter: parent.horizontalCenter
        text: "Click Somewhere"
        color: "white"
        font.pixelSize: 24
    }
}