bug/src/com/google/zxing/client/bug/app/BugBarcodeApp.java

   1 /*
   2  * Copyright 2008 ZXing authors
   3  *
   4  * Licensed under the Apache License, Version 2.0 (the "License");
   5  * you may not use this file except in compliance with the License.
   6  * You may obtain a copy of the License at
   7  *
   8  *      http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an "AS IS" BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  */
  16
  17 package com.google.zxing.client.bug.app;
  18
  19 import com.buglabs.bug.module.camera.pub.ICameraDevice;
  20 import com.buglabs.bug.module.camera.pub.ICameraModuleControl;
  21 import com.buglabs.device.ButtonEvent;
  22 import com.buglabs.device.IButtonEventListener;
  23 import com.buglabs.device.IButtonEventProvider;
  24 import com.google.zxing.MonochromeBitmapSource;
  25 import com.google.zxing.MultiFormatReader;
  26 import com.google.zxing.Reader;
  27 import com.google.zxing.ReaderException;
  28 import com.google.zxing.Result;
  29 import com.google.zxing.client.bug.AWTImageMonochromeBitmapSource;
  30 import com.google.zxing.client.bug.ImageCanvas;
  31
  32 import java.awt.BorderLayout;
  33 import java.awt.Color;
  34 import java.awt.Frame;
  35 import java.awt.Image;
  36 import java.awt.Label;
  37 import java.awt.Toolkit;
  38 import java.awt.image.ImageObserver;
  39 import java.io.IOException;
  40
  41 /**
  42  * @author David Albert
  43  */
  44 public final class BugBarcodeApp implements IButtonEventListener, ImageObserver {
  45
  46         private final ICameraDevice camera;
  47   private final ICameraModuleControl cameraControl;
  48         private final Frame frame;
  49         private Image image;
  50         private ImageCanvas imageCanvas;
  51         private Label barcodeLabel;
  52         private boolean pictureTaken;
  53         private final Reader reader;
  54
  55   public BugBarcodeApp(Frame frame,
  56                        ICameraDevice camera,
  57                        ICameraModuleControl cameraControl,
  58                        IButtonEventProvider buttonProvider) {
  59                 this.frame = frame;
  60                 this.camera = camera;
  61                 this.reader = new MultiFormatReader();
  62                 this.cameraControl = cameraControl;
  63                 pictureTaken = false;
  64                 buttonProvider.addListener(this);
  65                 createUI();
  66         }
  67
  68         private void createUI() {
  69                 frame.setTitle("BugBarcode");
  70                 frame.setBackground(Color.WHITE);
  71                 frame.setLayout(new BorderLayout());
  72                 barcodeLabel = new Label("Take a picture of a barcode!", Label.CENTER);
  73                 frame.add(barcodeLabel, BorderLayout.SOUTH);
  74                 imageCanvas = new ImageCanvas(null);
  75                 frame.setVisible(true);
  76         }
  77
  78         private void shoot() throws IOException {
  79                 // get image from camera for use with physical bug
  80           cameraControl.setLEDFlash(true);
  81                 image = Toolkit.getDefaultToolkit().createImage(camera.getImage()).getScaledInstance(400, 300, Image.SCALE_FAST);
  82           cameraControl.setLEDFlash(false);
  83                 if (Toolkit.getDefaultToolkit().prepareImage(image, -1, -1, this)) {
  84                         drawAndScan();
  85                 }
  86         }
  87
  88         private void drawAndScan() {
  89                 imageCanvas.setImage(image.getScaledInstance(216, 150, Image.SCALE_FAST));
  90                 if (!pictureTaken) {
  91                         frame.add(imageCanvas, BorderLayout.CENTER);
  92                         pictureTaken = true;
  93                         frame.setVisible(true);
  94                 }
  95                 imageCanvas.repaint();
  96                 try {
  97       MonochromeBitmapSource source = new AWTImageMonochromeBitmapSource(image);
  98       Result result = reader.decode(source);
  99                         barcodeLabel.setText(result.getText());
 100                 } catch (ReaderException re) {
 101                         barcodeLabel.setText("I can't find a barcode here");
 102                 }
 103         }
 104
 105         public void buttonEvent(ButtonEvent event) {
 106                 if (event.getButton() == ButtonEvent.BUTTON_HOTKEY_1 && event.getAction() == 0) {
 107       try {
 108         shoot();
 109       } catch (IOException ioe) {
 110         // continue
 111       }
 112     }
 113         }
 114
 115         public boolean imageUpdate(Image img, int infoflags, int x, int y, int width, int height) {
 116                 if ((infoflags & ALLBITS) != 0) {
 117       drawAndScan();
 118       return false;
 119                 }
 120                 return true;
 121         }
 122 }