audioengine.qml Example File

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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
          }
      }
  }