/** Download actual file */
public void download() {
StreamResource resource = new StreamResource(source, fileName);
resource
.getStream()
.setParameter("Content-Disposition", "attachment;filename=\"" + fileName + "\"");
resource.setMIMEType("application/octet-stream");
resource.setCacheTime(0);
FileDownloader downloader = new FileDownloader(resource);
downloader.extend(ui);
}
private void showNonMobileNotification() {
try {
URL appUrl = Page.getCurrent().getLocation().toURL();
String myIp = Inet4Address.getLocalHost().getHostAddress();
final String qrCodeUrl = appUrl.toString().replaceAll("localhost", myIp);
Label info =
new Label(
"You appear to be running this demo on a non-portable device. "
+ "Parking is intended for touch devices primarily. "
+ "Please read the QR code on your touch device to access the demo.");
info.setWidth("310px");
Image qrCode = new Image();
qrCode.addStyleName("qrcode-image");
StreamResource resource =
new StreamResource(
new StreamSource() {
@Override
public InputStream getStream() {
InputStream result = null;
try {
final Map<EncodeHintType, ErrorCorrectionLevel> hintMap = Maps.newHashMap();
hintMap.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.L);
final QRCodeWriter qrCodeWriter = new QRCodeWriter();
final BitMatrix byteMatrix =
qrCodeWriter.encode(qrCodeUrl, BarcodeFormat.QR_CODE, 150, 150, hintMap);
final int width = byteMatrix.getWidth();
final BufferedImage image =
new BufferedImage(width, width, BufferedImage.TYPE_INT_RGB);
image.createGraphics();
final Graphics2D graphics = (Graphics2D) image.getGraphics();
graphics.setColor(Color.WHITE);
graphics.fillRect(0, 0, width, width);
graphics.setColor(Color.BLACK);
for (int i = 0; i < width; i++) {
for (int j = 0; j < width; j++) {
if (byteMatrix.get(i, j)) {
graphics.fillRect(i, j, 1, 1);
}
}
}
final ByteArrayOutputStream baos = new ByteArrayOutputStream();
try {
ImageIO.write(image, "png", baos);
} catch (final IOException e) {
e.printStackTrace();
}
result = new ByteArrayInputStream(baos.toByteArray());
} catch (WriterException e) {
e.printStackTrace();
}
return result;
}
},
"qrcode-" + new Date().getTime() + ".png");
resource.setCacheTime(0);
qrCode.setSource(resource);
CssLayout qrCodeLayout = new CssLayout(qrCode, info);
qrCodeLayout.setSizeFull();
Window window = new Window(null, qrCodeLayout);
window.setWidth(500.0f, Unit.PIXELS);
window.setHeight(200.0f, Unit.PIXELS);
window.addStyleName("qr-code");
window.setModal(true);
window.setResizable(false);
window.setDraggable(false);
addWindow(window);
window.center();
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (UnknownHostException e) {
e.printStackTrace();
}
}