/****************************************************************************
**
** Copyright (C) 2012 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:
**
** "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 Digia Plc and its Subsidiary(-ies) 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
import "../../../shared" as UI //Has a shared UI element

Rectangle {
    width: 360
    height: 540
    ParticleSystem { id: particles }
    ImageParticle {
        system: particles
        sprites: Sprite {
            name: "snow"
            source: "../../images/snowflake.png"
            frameCount: 51
            frameDuration: 40
            frameDurationVariation: 8
        }
    }

    //! [0]
    Wander { 
        id: wanderer
        system: particles
        anchors.fill: parent
        xVariance: 360/(wanderer.affectedParameter+1);
        pace: 100*(wanderer.affectedParameter+1);
    }
    //! [0]

    Emitter {
        system: particles
        emitRate: 20
        lifeSpan: 7000
        velocity: PointDirection { y:80; yVariation: 40; }
        acceleration: PointDirection { y: 4 }
        size: 20
        sizeVariation: 10
        width: parent.width
        height: 100
    }
    Row {
        anchors.bottom: parent.bottom
        anchors.horizontalCenter: parent.horizontalCenter
        spacing: 4
        GreyButton {
            text:"dx/dt"
            onClicked: wanderer.affectedParameter = Wander.Position;
        }
        GreyButton {
            text:"dv/dt"
            onClicked: wanderer.affectedParameter = Wander.Velocity;
        }
        GreyButton {
            text:"da/dt"
            onClicked: wanderer.affectedParameter = Wander.Acceleration;
        }
    }
}