var txtSize = 22;

//Called when application is started.
function OnStart()
{
    lay = app.CreateLayout( "linear", "FillXY" ); 
    lay.SetBackground( "/Sys/Img/BlueBack.png" );
 
    //Create a layout to hold the search controls
    laySearch = app.CreateLayout( "Linear", "Horizontal, FillX, VCenter" ); 
    laySearch.SetBackColor( "#000000" );
    laySearch.SetPadding( 0, 0.01, 0, 0.01 );
 
    //Create a TextEdit control for entering search text
    txeSearch = app.CreateTextEdit( "", 0.85 );
    txeSearch.SetTextSize( txtSize );
 
    //Create a search button
    btnSearch = app.CreateText( "[fa-search]", 0.1, -1, "FontAwesome" );
    btnSearch.SetTextSize( txtSize );
    btnSearch.SetOnTouch( btnSearch_OnTouch );
 
    laySearch.AddChild( txeSearch );
    laySearch.AddChild( btnSearch );
    lay.AddChild( laySearch );
 
    //Add layout to app. 
    app.AddLayout( lay );
}

//Called when the search button is pressed
function btnSearch_OnTouch( ev )
{
    if( ev.action=="Down" )
    {
        this.SetTextSize( txtSize-4 );
    }
    else if( ev.action=="Up" ) 
    {
        this.SetTextSize( txtSize );
    
        var searchText = txeSearch.GetText();
        app.ShowPopup( "Search: " + searchText );
    }
}