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--- plugins:barcode_reader [2015/03/26 10:51]
octazid created
+++ plugins:barcode_reader [2015/03/26 10:53]
octazid [Sample App]
@@ Line 115: / Line 115: @@
 <code javascript>
+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();
+}
 </code>

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