SetOnKey

You can use SetOnKey for receiving and handling all key events fired in the application.

app.SetOnKey( callback )

You may want to use it with DisableKeys - i.e. for defining a custom ENTER command for automatic control focussing.

You can find the complete list of keys and their codes on the Android Developer Page.

See Also: SimulateKey

Example - Demonstration click to expand contents

app.DisableKeys( 'VOLUME_DOWN,VOLUME_UP,BACK' );

function OnStart()
{
    lay = app.CreateLayout( "linear", "VCenter,FillXY" );

    txt = app.CreateText( "", -1, -1, "multiline,left,monospace" );
    lay.AddChild( txt );

    edt = app.CreateTextEdit( "", .8, .1 );
    lay.AddChild( edt );

    app.AddLayout( lay );

    app.SetOnKey( OnKey );

    edt.Focus();
    app.ShowKeyboard( edt )
    edt.Gone();
}

function OnKey(action, name, code, extra) {
    var text =
        "action:" + action +
        "\nname :" + name +
        "\ncode :" + code +
        "\nextra :" + extra;

    txt.SetText( text );
}

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Example - Surprise click to expand contents

var prev;

function OnStart()
{
    app.DisableKeys( "VOLUME_DOWN,VOLUME_UP" );
    app.ShowPopup( "Press the volume keys!" );

    lay = app.CreateLayout( "Linear", "FillX" );
    lay.SetPadding( 0, .85 );
    lay.Hide();

    img = app.CreateImage( "/Sys/Img/Hello.png", -1, .3 );
    lay.AddChild( img );

    app.AddLayout( lay );

    app.SetOnKey( OnKey );
}

function OnKey(action, name, code, extra)
{
    if( action != prev ) {
        if( action == "Down" ) lay.Animate( "SlideFromBottom", null, 300 );
        if( action == "Up" ) lay.Animate( "SlideToBottom" , null, 300 );
    }
    prev = action;
}

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Example - Demonstration click to expand contents

Example - Surprise click to expand contents

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