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1 package demo.notification.whiteboard;
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5 import java.io.File  ;
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7 import java.awt.Canvas ;
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9 import java.awt.Toolkit ;
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11 import java.awt.MediaTracker ;
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13 import java.awt.Dimension ;
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15 import java.awt.Image ;
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17 import java.awt.Graphics ;
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27 public class PicView extends Canvas {
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29 private Toolkit toolkit;
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31 private MediaTracker mediaTracker;
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33 private Image image;
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37 public PicView(String filename) {
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39 super();
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41 toolkit = Toolkit.getDefaultToolkit();
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43 mediaTracker = new MediaTracker (this);
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45 image = loadImage(filename);
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47 setSize(getDim() );
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49 }
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53 private Dimension getDim() {
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55 Dimension d = new Dimension (0, 0);
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57 if (image != null) {
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59 d.width = image.getWidth (this);
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61 d.height = image.getHeight (this);
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63 }
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65 return d;
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67 }
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71 Image loadImage(String filename) {
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73 if ( !new File (filename).exists ()) {
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75 System.out.println("File "+filename+" not Found !");
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77 System.exit(1);
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79 }
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83 Image imageData = toolkit.getImage(filename);
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85 mediaTracker.addImage(imageData,0);
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87
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89 try {
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91 mediaTracker.waitForID(0);
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93 } catch (InterruptedException ie) {}
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97 return imageData;
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99 }
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103 public void paint(Graphics g) {
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105 g.clearRect (0, 0, getDim().width, getDim().height);
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107 g.drawImage(image,0,0,null);
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109 }
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111 }
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