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/Users/lyon/j4p/src/ip/gui/frames/SimpleImageFrame.java
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1 package ip.gui.frames;
2
3 import java.awt.*;
4 import java.awt.event.ActionEvent;
5 import java.awt.event.ActionListener;
6 import java.awt.image.ColorModel;
7 import java.awt.image.MemoryImageSource;
8 import java.awt.image.PixelGrabber;
9 import java.io.File;
10
11 public class SimpleImageFrame
12 extends Frame
13 implements ActionListener {
14
15
16 private Image image;
17 private ColorModel cm = ColorModel.getRGBdefault();
18 private boolean imageComesFromFile = false;
19
20 public short r[][];
21 public short g[][];
22 public short b[][];
23
24 public int width = 128;
25 public int height = 128;
26
27 // A default file name..set to null
28 // to start with file open dialog.
29 // Set to string to start with an image.
30 // Use a fully qualified path name, in quotes.
31 private String fileName = null;
32
33 private MenuBar menuBar = new MenuBar();
34 Menu fileMenu = new Menu("File");
35
36 Menu openMenu = new Menu("Open");
37 MenuItem openGif_mi = addMenuItem(openMenu, "ip.gif or jpeg");
38 MenuItem revert_mi = addMenuItem(openMenu, "revert");
39 MenuItem fitScreen_mi = addMenuItem(openMenu, "fitScreen");
40
41
42 public void fitScreen() {
43 Toolkit tk = Toolkit.getDefaultToolkit();
44 Dimension d
45 = tk.getScreenSize();
46 setSize(d.width, d.height);
47 }
48
49 public MenuItem addMenuItem(Menu aMenu, String itemName) {
50 MenuItem mi = new MenuItem(itemName);
51 aMenu.add(mi);
52 mi.addActionListener(this);
53 return (mi);
54 }
55
56 public void actionPerformed(ActionEvent e) {
57 Object o = e.getSource();
58
59 if (o == fitScreen_mi) {
60 fitScreen();
61 return;
62 }
63 if (o == openGif_mi) {
64 openGif();
65 return;
66 }
67 if (o == revert_mi) {
68 revert();
69 return;
70 }
71 }
72
73 public SimpleImageFrame(String title) {
74 super(title);
75 initialize();
76 }
77
78
79 private void initialize() {
80 initMenu();
81 show();
82 setSize(width, height);
83 repaint();
84 }
85
86
87 private void initMenu() {
88 fileMenu.add(openMenu);
89 menuBar.add(fileMenu);
90 setMenuBar(menuBar);
91 }
92
93 protected String getReadFileName() {
94 FileDialog fd = new
95 FileDialog(this, "select a file");
96 fd.show();
97 String file_name = fd.getFile();
98 if (fd.getFile() == null) return null;
99 String path_name = fd.getDirectory();
100 String file_string = path_name + file_name;
101 System.out.println("Opening file: " + file_string);
102 fd.dispose();
103 return file_string;
104 }
105
106 public void setImageResize(Image i) {
107 setImage(i);
108
109 setSize(width, height);
110 setVisible(true);
111 repaint();
112 }
113
114 public void setImage(Image i) {
115 image = i;
116 waitForImage(this, i);
117 width = i.getWidth(this);
118 height = i.getHeight(this);
119 image2Short();
120 }
121
122 public void setImageNoShort(Image i) {
123 image = i;
124 waitForImage(this, i);
125 width = i.getWidth(this);
126 height = i.getHeight(this);
127 }
128
129 public Image getImage() {
130 waitForImage(this, image);
131 return image;
132 }
133
134 public String getFileName() {
135 return fileName;
136 }
137
138 /**
139 short2Image - turn 3 short arrays, r, g and b into an image.
140 */
141 public void short2Image() {
142 width = r.length;
143 height = r[0].length;
144 Toolkit tk = Toolkit.getDefaultToolkit();
145 int pels[] = new int[width * height];
146 for (int x = 0; x < width; x++)
147 for (int y = 0; y < height; y++) {
148 pels[x + y * width] =
149 0xff000000
150 | (r[x][y] << 16)
151 | (g[x][y] << 8)
152 | b[x][y];
153 }
154 Image i = tk.createImage(
155 new MemoryImageSource(
156 width,
157 height,
158 cm,
159 pels, 0,
160 width));
161 setImageNoShort(i);
162 Rectangle r = getBounds();
163 repaint(0, 0, r.width, r.height);
164 }
165
166 public void pels2Image(int pels[]) {
167 width = r.length;
168 height = r[0].length;
169 Toolkit tk = Toolkit.getDefaultToolkit();
170 Image i = tk.createImage(
171 new MemoryImageSource(
172 width,
173 height,
174 cm,
175 pels, 0,
176 width));
177 setImageNoShort(i);
178 Rectangle r = getBounds();
179 repaint(0, 0, r.width, r.height);
180 }
181
182 /**
183 image2Short - takes the private Image instance and
184 makes 3 short arrays, r, g and b.
185 */
186 public void image2Short() {
187 r = new short[width][height];
188 g = new short[width][height];
189 b = new short[width][height];
190
191 int pels[] = new int[width * height];
192 cm = ColorModel.getRGBdefault();
193
194 PixelGrabber grabber =
195 new PixelGrabber(
196 image, 0, 0,
197 width, height, pels, 0, width);
198
199 try {
200 grabber.grabPixels();
201 } catch (InterruptedException e) {
202 }
203 ;
204 int i = 0;
205 for (int x = 0; x < width; x++)
206 for (int y = 0; y < height; y++) {
207 i = x + y * width;
208 b[x][y] = (short) cm.getBlue(pels[i]);
209 g[x][y] = (short) cm.getGreen(pels[i]);
210 r[x][y] = (short) cm.getRed(pels[i]);
211 }
212 }
213
214
215 static void waitForImage(Component component,
216 Image image) {
217 MediaTracker tracker = new MediaTracker(component);
218 try {
219 tracker.addImage(image, 0);
220 tracker.waitForID(0);
221 if (!tracker.checkID(0))
222 System.out.println("Load failure!");
223 } catch (InterruptedException e) {
224 }
225 }
226
227 public void openGif() {
228 String fn = getReadFileName();
229 if (fn == null) return;
230 openGif(fn);
231 }
232
233 public void setFileName(String _fn) {
234 File f = new File(_fn);
235 if (f.exists()) {
236 fileName = _fn;
237 System.out.println(
238 "File:" + fileName +
239 "\nis " + f.length() + " bytes long");
240 }
241 imageComesFromFile = true;
242
243 }
244
245 public void openGif(String fn) {
246 File f = new File(fn);
247
248 fileName = fn;
249 image = Toolkit.getDefaultToolkit().getImage(
250 fileName);
251 setImageResize(image);
252 imageComesFromFile = true;
253 }
254
255 public void revert() {
256 Toolkit tk = Toolkit.getDefaultToolkit();
257 if (fileName == null)
258 openGif();
259 else {
260 image =
261 tk.getImage(fileName);
262 setImageResize(image);
263 }
264
265 }
266
267 public void revertNoResize() {
268 Toolkit tk = Toolkit.getDefaultToolkit();
269 if (fileName == null)
270 openGif();
271 else {
272 image =
273 tk.getImage(fileName);
274 setImage(image);
275 }
276
277 }
278
279 // Takes a packed RGB model and makes
280 // the short arrays
281 public void int2Short(int pels[]) {
282 System.out.println("The width and height are"
283 + width + "," + height);
284 r = new short[width][height];
285 g = new short[width][height];
286 b = new short[width][height];
287
288 cm = ColorModel.getRGBdefault();
289 int i = 0;
290 for (int x = 0; x < width; x++)
291 for (int y = 0; y < height; y++) {
292 i = x + y * width;
293 b[x][y] = (short) cm.getBlue(pels[i]);
294 g[x][y] = (short) cm.getGreen(pels[i]);
295 r[x][y] = (short) cm.getRed(pels[i]);
296 }
297 }
298
299
300 public static void main(String args[]) {
301 SimpleImageFrame imgFrm =
302 new SimpleImageFrame("SimpleImageFrame");
303 imgFrm.openGif();
304 }
305
306 public void paint(Graphics g) {
307 if (image != null) {
308 Rectangle r = getBounds();
309 g.drawImage(image, 0, 0, r.width, r.height,
310 this);
311 }
312 }
313 }