BarcodeReader

app.LoadPlugin( "BarcodeReader" );

function OnStart()
{
  app.SetOrientation( "Landscape" );

  lay = app.CreateLayout( "Linear", "FillXY" );

  reader = app.CreateObject( "BarcodeReader" );

  cam = app.CreateCameraView( 0.8, 1, "VGA, UseYUV" );
  cam.SetOnReady( cam_OnReady );
  lay.AddChild( cam );

  app.AddLayout( lay );
}

function cam_OnReady()
{
  cam.StartPreview();
  cam.SetFocusMode( "macro" );
  DecodeFromCamera();
}

function DecodeFromCamera()
{
  var result = reader.Decode( cam );

  if( result != null )
  {
    app.ShowPopup( result.barcodeType + ": " + result.content );
  }

  setTimeout( DecodeFromCamera, 200 );
}

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app.LoadPlugin( "BarcodeReader" );

//Called when application is started.
function OnStart()
{
  //Fix orientation to landscape.
  app.SetOrientation( "Landscape" );
  
  //Stop screen turning off.
  app.PreventScreenLock( true );

  //Create a layout to fill the screen.
  lay = app.CreateLayout( "Absolute", "FillXY" );

  //Create the barcode reader.
  reader = app.CreateObject( "BarcodeReader" );

  //Create camera view control
  //(UseYUV is required for use with BarcodeReader)
  cam = app.CreateCameraView( 0.8, 1.0, "VGA, UseYUV" );
  cam.SetPosition( 0.1, 0 );
  cam.SetOnReady( cam_OnReady );
  lay.AddChild( cam );

  //Add main layout to app.
  app.AddLayout( lay );
}

//Called when camera is ready.
function cam_OnReady()
{
  //Create an image control over the top of the
  //camera view with transparency (alpha) so
  //we can show a framed area.
  img = app.CreateImage( null, 1.0, 1.0 );
  img.SetAlpha( 0.5 );
  lay.AddChild( img );
  img.SetPaintColor( "#ff0000" );
  img.SetPaintStyle( "Line" );
  img.SetLineWidth( 2.5 );
  img.DrawRectangle( 0.2, 0.2, 0.8, 0.8 );

  //Create a layout for instruction text
  //and flash checkbox.
  overlay = app.CreateLayout( "Linear", "FillXY" );
  lay.AddChild(overlay);

  //Create the instruction text.
  txt = app.CreateText( "Position a barcode in the frame to read it" );
  txt.SetMargins( 0,0.05,0,0 );
  txt.SetPadding( 0.01,0,0.01,0 );
  txt.SetTextColor( "#ffffff" );
  txt.SetBackColor( "#44000000" );
  txt.SetTextSize( 18 );
  overlay.AddChild( txt );

  //Create Use Flash check box.
  chkFlash = app.CreateCheckBox( "Use Flash" );
  chkFlash.SetMargins( 0,0.75,0,0 );
  chkFlash.SetPadding( 0.01,0,0.01,0 );
  chkFlash.SetTextColor( "#ffffff" );
  chkFlash.SetBackColor( "#44000000" );
  chkFlash.SetTextSize( 18 );
  chkFlash.SetOnTouch( chkFlash_OnTouch );
  overlay.AddChild( chkFlash );

  //Start preview.
  cam.StartPreview();

  //Macro focus mode works best for
  //reading barcodes.
  cam.SetFocusMode( "macro" );

  //Start decoding the camera preview.
  DecodeFromCamera();
}

//Handle Use Flash checkbox touch
function chkFlash_OnTouch( value )
{
cam.SetFlash( value );
}

function DecodeFromCamera()
{
  //Attempt to detect a barcode in the
  //camera preview.
  var result = reader.Decode( cam );

  //If result is not null, a barcode
  //was detected.
  if( result != null )
  {
    //Vibrate and show result dialog.
    app.Vibrate( "0,100,30,100,50,300" );
    ShowResult( result );
  }
  else
  {
    //Decode again in 200 milliseconds.
    setTimeout( DecodeFromCamera, 200 );
  }
}

function ShowResult( result )
{
  //Create dialog window.
  resultDlg = app.CreateDialog( result.barcodeType, "NoCancel" );

  //Create a layout for dialog.
  layDlg = app.CreateLayout( "Linear", "Vertical, FillXY" );
  layDlg.SetPadding( 0.02, 0, 0.02, 0.02 );
  resultDlg.AddLayout( layDlg );

  //Create text for the content type name.
  txtDlg = app.CreateText( result.contentType );
  txtDlg.SetTextSize( 22 );
  txtDlg.SetTextColor( "#0099CC" );
  layDlg.AddChild( txtDlg );

  //Create a scroller for the content.
  scrDlg = app.CreateScroller( 0.4, 0.45 );
  scrDlg.SetMargins( 0, 0.01, 0, 0 );
  layDlg.AddChild( scrDlg );

  //Create text for the content.
  txtDlg = app.CreateText( result.content, 0.4, -1, "Multiline" );
  txtDlg.SetTextSize( 18 );
  scrDlg.AddChild( txtDlg );

  //Create an Ok button to dismiss the dialog.
  btnDlg = app.CreateButton( "Ok" );
  btnDlg.SetOnTouch( resultDlg_OnOk );
  layDlg.AddChild( btnDlg );

  //Show dialog.
  resultDlg.Show();
}

//Called when the result dialog Ok button is pressed
function resultDlg_OnOk()
{
  resultDlg.Dismiss();

  //Start decoding again.
  DecodeFromCamera();
}

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