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1
36
37
40
41 import java.awt.Graphics  ;
42 import java.util.StringTokenizer ;
43 import java.awt.Image ;
44 import java.net.URL ;
45 import java.net.MalformedURLException ;
46
47
56 class AniArea extends ImageMapArea {
57
58 Image sourceImage;
59 int nFrames;
60 int coords[];
61 int currentFrame = 0;
62
63 public void handleArg(String s) {
64 StringTokenizer st = new StringTokenizer (s, ", ");
65 int i;
66 String imgName;
67
68 imgName = st.nextToken();
69 try {
70 sourceImage = parent.getImage(new URL (parent.getDocumentBase(),
71 imgName));
72 parent.addImage(sourceImage);
73 } catch (MalformedURLException e) {}
74
75 nFrames = 0;
76 coords = new int[40];
77
78 while (st.hasMoreTokens()) {
79 coords[nFrames*2] = Integer.parseInt(st.nextToken());
80 coords[(nFrames*2)+1] = Integer.parseInt(st.nextToken());
81 nFrames++;
82 if (nFrames > 19)
83 break;
84 }
85 }
86
87 public boolean animate() {
88 if (entered) {
89 repaint();
90 }
91 return entered;
92 }
93
94 public void enter() {
95 currentFrame = 0;
96 parent.startAnimation();
97 }
98
99 public void highlight(Graphics g) {
100 if (entered) {
101 drawImage(g, sourceImage,
102 X-coords[currentFrame*2], Y-coords[(currentFrame*2)+1],
103 X, Y, W, H);
104 currentFrame++;
105 if (currentFrame >= nFrames)
106 currentFrame = 0;
107 }
108 }
109 public String getAppletInfo() {
110 return "Title: AniArea \nAuthor: Chuck McManis \nThis ImageMapArea subclass provides for a button that animates when the mouse is over it. The animation is specifed as a base image that contains all of the animation frames and then a series of X,Y coordinate pairs that define the top left corner of each new frame.";
111 }
112 }
113
114
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Java API By Example, From Geeks To Geeks.