|
1
30
31 package rcm.awt;
32
33 import java.awt.*;
34 import java.awt.event.*;
35 import java.util.Vector  ;
36 import rcm.util.Win;
37
38
42 public class PopupDialog extends Dialog {
43
44 public static final int YES = 0;
45 public static final int OK = 0;
46 public static final int NO = 1;
47 public static final int CANCEL = 2;
48
49 Component parent;
50 int answer = -1;
51 String text;
52
53 TextField textfield;
54 Button okButton, noButton, cancelButton;
55
56 public static String ask (Component comp, String topic, String question, String defaultAnswer) {
57 PopupDialog d = new PopupDialog (comp, topic, true,
58 question, defaultAnswer,
59 "OK", null, "Cancel");
60 d.show ();
61 switch (d.getAnswer ()) {
62 case OK:
63 return d.getText ();
64 default:
65 return null;
66 }
67 }
68
69 public static String ask (Component comp, String topic, String question) {
70 return ask (comp, topic, question, "");
71 }
72
73 public static boolean okcancel (Component comp, String topic, String question) {
74 PopupDialog d = new PopupDialog (comp, topic, true,
75 question, null,
76 "OK", null, "Cancel");
77 d.show ();
78 return (d.getAnswer () == OK);
79 }
80
81 public static boolean yesno (Component comp, String topic, String question) {
82 PopupDialog d = new PopupDialog (comp, topic, true,
83 question, null,
84 "Yes", "No", null);
85 d.show ();
86 return (d.getAnswer () == YES);
87 }
88
89 public static int yesnocancel (Component comp, String topic, String question) {
90 PopupDialog d = new PopupDialog (comp, topic, true,
91 question, null,
92 "Yes", "No", "Cancel");
93 d.show ();
94 return d.getAnswer ();
95 }
96
97 public static void warn (Component comp, String topic, String message) {
98 PopupDialog d = new PopupDialog (comp, topic, true,
99 message, null,
100 "OK", null, null);
101 d.show ();
102 }
103
104 public static String currentDirectory = "";
105
106 public static String askFilename (Component comp, String topic,
107 String defaultFilename, boolean loading) {
108 try {
109 FileDialog fd = new FileDialog (Win.findFrame(comp),
110 topic,
111 loading ? FileDialog.LOAD : FileDialog.SAVE);
112
113 if (currentDirectory != null)
114 fd.setDirectory (currentDirectory);
115 if (defaultFilename != null)
116 fd.setFile (defaultFilename);
117
118 fd.show ();
119
120 String dir = fd.getDirectory();
121 String file = fd.getFile ();
122
123 if (dir == null || file == null)
124 return null;
125
126 currentDirectory = dir;
127 return dir + file;
128 } catch (AWTError e) {
129 return ask (comp, topic, "Filename:", defaultFilename);
130 }
131 }
132
133 public static String askDirectory (Component comp, String topic,
134 String defaultFilename, boolean loading) {
135 try {
136 FileDialog fd = new FileDialog (Win.findFrame(comp),
137 topic,
138 loading ? FileDialog.LOAD : FileDialog.SAVE);
139
140 if (currentDirectory != null)
141 fd.setDirectory (currentDirectory);
142 if (defaultFilename != null)
143 fd.setFile (defaultFilename);
144
145 fd.show ();
146
147 String dir = fd.getDirectory();
148
149 if (dir != null)
150 currentDirectory = dir;
151
152 return dir;
153 } catch (AWTError e) {
154 return ask (comp, topic, "Directory:", defaultFilename);
155 }
156 }
157
158
159 public PopupDialog (Component parent, String title, boolean modal) {
160 super (Win.findFrameOrMakeFrame (parent), title, modal);
161 this.parent = parent;
162 }
163
164 public PopupDialog (Component parent, String title, boolean modal,
165 String question, String initialEntry,
166 String okOrYes, String no, String cancel) {
167 this (parent, title, modal);
168
169 if (parent != null)
170 setFont (parent.getFont ());
171
172 Panel middle = new Panel ();
173 add ("Center", BorderPanel.wrap (middle, 10, 10, 10, 5));
174 middle.setLayout (new BorderLayout ());
175 MultiLineLabel questionLabel = new MultiLineLabel (question, Label.LEFT);
176 middle.add ("Center", questionLabel);
177 if (initialEntry != null) {
178 textfield = new TextField (Math.max (40, initialEntry.length()+1));
179 middle.add ("South", textfield);
180 textfield.setText (initialEntry);
181 textfield.selectAll ();
182 textfield.addActionListener (new ActionListener () {
183 public void actionPerformed (ActionEvent event) {
184 answer = OK;
185 close ();
186 }
187 });
188 }
189
190 Panel bottom = new Panel ();
191 add ("South", bottom);
192
193 if (okOrYes != null) {
194 okButton = new Button (okOrYes);
195 okButton.addActionListener (new ActionListener () {
196 public void actionPerformed (ActionEvent event) {
197 answer = OK;
198 close ();
199 }
200 });
201 bottom.add (okButton);
202 }
203
204 if (no != null) {
205 noButton = new Button (no);
206 noButton.addActionListener (new ActionListener () {
207 public void actionPerformed (ActionEvent event) {
208 answer = NO;
209 close ();
210 }
211 });
212 bottom.add (noButton);
213 }
214
215 if (cancel != null) {
216 cancelButton = new Button (cancel);
217 cancelButton.addActionListener (new ActionListener () {
218 public void actionPerformed (ActionEvent event) {
219 answer = CANCEL;
220 close ();
221 }
222 });
223 bottom.add (cancelButton);
224 }
225
226 addWindowListener (new WindowAdapter () {
227 public void windowClosing (WindowEvent event) {
228 if (cancelButton != null) {
229 answer = CANCEL;
230 close ();
231 }
232 else if (noButton == null && cancelButton == null) {
233 answer = OK;
234 close ();
235 }
236 }
237 });
238
239 pack ();
246 }
247
248 public static void centerWindow (Window window, Component ref) {
249 Dimension size = window.getSize();
250 Dimension refSize = (ref != null) ? ref.getSize() : Toolkit.getDefaultToolkit().getScreenSize();
251 Point origin = (ref != null) ? ref.getLocationOnScreen () : new Point (0, 0);
252
253 if (refSize != null) {
254 int x = Math.max (0, origin.x + (refSize.width - size.width) / 2);
255 int y = Math.max (0, origin.y + (refSize.height - size.height) / 2);
256 window.setLocation (x, y);
257 }
258 }
259
260 public void show () {
261 centerWindow (this, parent);
262 super.show ();
263 if (textfield != null)
264 textfield.requestFocus ();
265 }
266
267 public int getAnswer () {
268 return answer;
269 }
270
271 public void setAnswer (int answer) {
272 this.answer = answer;
273 }
274
275 public String getText () {
276 return text;
277 }
278
279 Vector listeners = new Vector ();
280
281 public synchronized void addPopupListener (PopupListener listener) {
282 listeners.addElement (listener);
283 }
284
285 public synchronized void removePopupListener (PopupListener listener) {
286 listeners.removeElement (listener);
287 }
288
289 public synchronized void close () {
290 text = (answer == OK && textfield != null)
291 ? textfield.getText () : null;
292
293 dispose ();
294 if (parent == null)
295 ((Frame)getParent()).dispose ();
296 else
297 parent.requestFocus ();
298
299 if (answer != -1) {
300 PopupEvent e = new PopupEvent (answer, text);
301 for (int i=0; i<listeners.size (); ++i) {
302 PopupListener p = (PopupListener) (listeners.elementAt (i));
303 switch (e.getID ()) {
304 case YES:
305 p.yes (e);
306 break;
307 case NO:
308 p.no (e);
309 break;
310 case CANCEL:
311 p.cancel (e);
312 break;
313 }
314 }
315 }
316
317 try {
318 finalize ();
319 } catch (Throwable t) {
320 throw new RuntimeException (t.toString());
321 }
322 }
323
324
325
329 public static void main (String [] args) {
330 String name = ask (null, "Enter Name", "Enter your full name:");
331
332 if (name != null) {
333 switch (yesnocancel (null, "Confirm",
334 "Hello, " + name + ".\nIs this your name?")) {
335 case PopupDialog.YES:
336 if (okcancel (null, "Thanks",
337 "Great!\nDo you want to play a game?")) {
338 warn (null, "Sorry", "Too bad, my mommy won't let me out of the house.");
339 }
340 break;
341
342 case PopupDialog.NO:
343 warn (null, "D'oh", "Oops. My bad.");
344 break;
345 }
346 }
347
348 System.exit (0);
349 }
350
351 }
352 |
Popular Tags |
Java API By Example, From Geeks To Geeks.