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<h1 class="title">audioengine.qml Example File</h1>
<span class="subtitle">multimedia/audioengine/qml/audioengine.qml</span>
<!-- $$$multimedia/audioengine/qml/audioengine.qml-description -->
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<pre class="qml">
/****************************************************************************
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** Copyright (C) 2017 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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import QtAudioEngine 1.0
import QtQuick 2.0
import "content"
Rectangle {
color:"white"
id: root
width: 300
height: 500
property int radius : 100
property real twoPi : Math.PI + Math.PI
MyAudioEngine {
id:audioEngine
listener.position : Qt.vector3d(observer.x, observer.y, 0);
}
Item {
id: circle
x: root.width / 2
y: root.height / 2
property real percent: 0
SequentialAnimation on percent {
id: circleAnim1
loops: Animation.Infinite
running: true
NumberAnimation {
duration: 12000
from: 0
to: 1
}
}
}
Item {
id: holder
x: circle.x - Math.sin(circle.percent * root.twoPi) * root.radius - 50
y: circle.y + Math.cos(circle.percent * root.twoPi) * root.radius + 50
}
Rectangle {
color:"green"
id: observer
width: 16
height: 16
x: circle.x - width / 2
y: circle.y - height / 2
}
Rectangle {
color:"red"
id: starship
width: 32
height: 32
x: holder.x - width / 2
y: holder.y - height / 2
}
MouseArea {
anchors.fill: parent
onClicked: {
audioEngine.sounds["effects"].play(Qt.vector3d(holder.x, holder.y, 0));
}
}
SoundInstance {
id: shipSound
engine:audioEngine
sound:"shipengine"
position: Qt.vector3d(holder.x, holder.y, 0)
direction: {
var a = (starship.rotation / 360) * root.twoPi;
return Qt.vector3d(Math.sin(a), -Math.cos(a), 0);
}
velocity: {
var speed = root.twoPi * root.radius / 4;
return shipSound.direction.times(speed);
}
Component.onCompleted: shipSound.play()
}
//Category Volume Control
Rectangle {
property variant volumeCtrl: audioEngine.categories["sfx"];
id: volumeBar
x: 10
y: 10
width: 280
height: 22
color: "darkgray"
Rectangle {
id: volumeTracker
x: 0
y: 0
width: volumeBar.volumeCtrl.volume * parent.width;
height: parent.height
color: "lightgreen"
}
Text {
text: " volume:" + Math.round(volumeBar.volumeCtrl.volume * 100) +"%";
font.pointSize: 16;
font.italic: true;
color: "black"
anchors.fill: parent
}
MouseArea {
anchors.fill: parent
property bool m:false
onPressed: {
m = true;
updateVolume(mouse);
}
onReleased: {
m = false;
}
onPositionChanged: {
if (m) {
updateVolume(mouse);
}
}
function updateVolume(mouse) {
volumeBar.volumeCtrl.volume = Math.min(1, Math.max(0, mouse.x / (volumeBar.width - 1)));
}
}
}
//Information display
Item {
x:10
y:32
Text {
text: " [live instances] = " + audioEngine.liveInstances;
font.pointSize: 14;
font.italic: true;
color: "black"
anchors.fill: parent
}
}
Item {
x:10
y:60
Text {
text: " [loading]=" + (audioEngine.loading ? "true" : "false");
font.pointSize: 16;
font.italic: true;
color: "black"
anchors.fill: parent
}
}
}
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