How to set the Volume on the media player in QML

Hello

I would like to adjust the volume of my QML Media Player object. According to the documentation:

http://developer.BlackBerry.com/native/reference/Cascades/bb__multimedia__mediaplayer.html

MediaPlayer class has a setVolume method, but I get:

TypeError: Result of expression 'myPlayer.setVolume' [undefined] is not a function.

How can I adjust the volume in QML?

Hi burakk,

Here are the steps that you must follow to adjust the volume by QML programming:

(1) define a signal myVolumeChanged to the main control QML

(2) define a slot that handles the signal preceding once it is triggered by the volume control of the MediaPlayer with the new volume

(3) fire this signal into the slots of the buttons onClicked two volume

I tried the above using the nowplaying waterfalls sample app and were able to achieve what you're trying to do, which is affecting the volume of the MediaPlayer using two buttons volume QML. Here's the code I added in the file main.qml from the sample application for your reference:

import bb.cascades 1.2
import bb.multimedia 1.0

Page {
    property double newVolume: 4
    signal myVolumeChanged()

    onMyVolumeChanged: {
        player.setVolume(newVolume);
    }

    Container {
        layout: DockLayout {}

        ImageView {
            ...
        }

        Label {
            ...
        }

        //! [1]
        ProgressBar {
               ....
        }
        //! [1]

        Container {
            layout: StackLayout {
                orientation: LayoutOrientation.LeftToRight
            }

            Button {
                text: "Increase Volume"
                onClicked: {
                    newVolume = newVolume + 1
                    myVolumeChanged();
                }
            }
            Button {
                text: "Decrease Volume"
                onClicked: {
                    newVolume = newVolume - 1
                    myVolumeChanged();
                }
            }
        }
    }

    attachedObjects: [
        //! [2]
        MediaPlayer {
            id: player

            sourceUrl: "music/song.mp3"
        },
        //! [2]

        //! [3]
        NowPlayingConnection {
            id: nowPlaying
            ...

        }
        //! [3]
    ]
}

Tags: BlackBerry Developers

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