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16 package org.joda.example.time;
17
18 import java.awt.Component  ;
19 import java.awt.Container ;
20 import java.awt.Dimension ;
21 import java.awt.GridBagConstraints ;
22 import java.awt.GridBagLayout ;
23 import java.awt.event.ActionEvent ;
24 import java.awt.event.ActionListener ;
25 import java.awt.event.ItemEvent ;
26 import java.awt.event.ItemListener ;
27
28 import javax.swing.BorderFactory ;
29 import javax.swing.Box ;
30 import javax.swing.BoxLayout ;
31 import javax.swing.JCheckBox ;
32 import javax.swing.JComboBox ;
33 import javax.swing.JComponent ;
34 import javax.swing.JFrame ;
35 import javax.swing.JLabel ;
36 import javax.swing.JPanel ;
37 import javax.swing.JTextField ;
38 import javax.swing.Timer ;
39 import javax.swing.event.DocumentEvent ;
40 import javax.swing.event.DocumentListener ;
41 import javax.swing.text.Document ;
42
43 import org.joda.time.Chronology;
44 import org.joda.time.DateTime;
45 import org.joda.time.DateTimeZone;
46 import org.joda.time.DurationField;
47 import org.joda.time.chrono.ISOChronology;
48
49
56 public class AgeCalculator extends JFrame {
57 static final int
58 YEARS = 1,
59 MONTHS = 2,
60 DAYS = 3,
61 WEEKYEARS = 4,
62 WEEKS = 5,
63 HOURS = 101,
64 MINUTES = 102,
65 SECONDS = 103;
66
67 public static void main(String [] args) throws Exception {
68 new AgeCalculator().show();
69 }
70
71 static JComponent fixedSize(JComponent component) {
72 component.setMaximumSize(component.getPreferredSize());
73 return component;
74 }
75
76 static JComponent fixedHeight(JComponent component) {
77 Dimension dim = component.getMaximumSize();
78 dim.height = component.getPreferredSize().height;
79 component.setMaximumSize(dim);
80 return component;
81 }
82
83 Chronology iChronology;
84
85 private String iBirthdateStr;
86 private FieldSet[] iFieldSets;
87 private Timer iTimer;
88
89 public AgeCalculator() {
90 super();
91
92 iChronology = ISOChronology.getInstance();
93 iBirthdateStr = "1970-01-01T00:00:00";
94
95 setTitle("Age Calculator");
96 setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
97 addMainArea(getContentPane());
98 addNotify();
99 Dimension size = getPreferredSize();
100 setSize(size);
101 Dimension screenSize = getToolkit().getScreenSize();
102 setLocation(screenSize.width / 2 - size.width / 2,
103 screenSize.height / 2 - size.height / 2);
104
105 iTimer = new Timer (500, new ActionListener () {
106 public void actionPerformed(ActionEvent e) {
107 updateResults();
108 }
109 });
110
111 iTimer.setInitialDelay(0);
112 iTimer.start();
113 }
114
115 private void addMainArea(Container container) {
116 JPanel panel = new JPanel ();
117 panel.setLayout(new BoxLayout (panel, BoxLayout.Y_AXIS));
118
119 addTopArea(panel);
120 panel.add(Box.createVerticalStrut(10));
121 addBottomArea(panel);
122 panel.add(Box.createVerticalGlue());
123
124 panel.setBorder(BorderFactory.createEmptyBorder(10, 10, 10, 10));
125
126 container.add(panel);
127 }
128
129 private void addTopArea(Container container) {
130 JPanel panel = new JPanel ();
131 panel.setLayout(new BoxLayout (panel, BoxLayout.X_AXIS));
132
133 panel.add(fixedHeight(new JLabel ("Birthdate")));
134 panel.add(Box.createHorizontalStrut(10));
135
136 final JTextField birthdateField = new JTextField (iBirthdateStr + ' ');
137 Document doc = birthdateField.getDocument();
138 doc.addDocumentListener(new DocumentListener () {
139 public void insertUpdate(DocumentEvent e) {
140 update(e);
141 }
142 public void removeUpdate(DocumentEvent e) {
143 update(e);
144 }
145 public void changedUpdate(DocumentEvent e) {
146 update(e);
147 }
148 private void update(DocumentEvent e) {
149 iBirthdateStr = birthdateField.getText();
150 updateResults();
151 }
152 });
153 panel.add(fixedHeight(birthdateField));
154
155 panel.add(Box.createHorizontalStrut(10));
156
157 Object [] ids = DateTimeZone.getAvailableIDs().toArray();
158 final JComboBox zoneSelector = new JComboBox (ids);
159 zoneSelector.setSelectedItem(DateTimeZone.getDefault().getID());
160 panel.add(fixedSize(zoneSelector));
161
162 zoneSelector.addActionListener(new ActionListener () {
163 public void actionPerformed(ActionEvent e) {
164 String id = (String )zoneSelector.getSelectedItem();
165 iChronology = ISOChronology.getInstance(DateTimeZone.forID(id));
166 updateResults();
167 }
168 });
169
170 container.add(fixedHeight(panel));
171 }
172
173 private void addBottomArea(Container container) {
174 JPanel panel = new JPanel ();
175 panel.setLayout(new BoxLayout (panel, BoxLayout.X_AXIS));
176
177 ItemListener listener = new ItemListener () {
178 public void itemStateChanged(ItemEvent e) {
179 updateResults();
180 }
181 };
182
183 iFieldSets = new FieldSet[] {
184 new FieldSet("Month Based", new FieldGroup[] {
185 new FieldGroup(listener, "Years", YEARS),
186 new FieldGroup(listener, "Months", MONTHS),
187 new FieldGroup(listener, "Days", DAYS),
188 new FieldGroup(listener, "Hours", HOURS),
189 new FieldGroup(listener, "Minutes", MINUTES),
190 new FieldGroup(listener, "Seconds", SECONDS)
191 })
192 ,
193 new FieldSet("Week Based", new FieldGroup[] {
194 new FieldGroup(listener, "Weekyears", WEEKYEARS),
195 new FieldGroup(listener, "Weeks", WEEKS),
196 new FieldGroup(listener, "Days", DAYS),
197 new FieldGroup(listener, "Hours", HOURS),
198 new FieldGroup(listener, "Minutes", MINUTES),
199 new FieldGroup(listener, "Seconds", SECONDS)
200 })
201 };
202
203 for (int i=0; i<iFieldSets.length; i++) {
204 if (i > 0) {
205 panel.add(Box.createHorizontalStrut(10));
206 }
207 iFieldSets[i].addTo(panel);
208 }
209 panel.add(Box.createVerticalGlue());
210
211 container.add(fixedHeight(panel));
212 }
213
214 private void updateResults() {
215 try {
216 DateTime dt = new DateTime(iBirthdateStr.trim(), iChronology);
217
218 long minuend = System.currentTimeMillis();
219 long subtrahend = dt.getMillis();
220
221 for (int i=0; i<iFieldSets.length; i++) {
222 iFieldSets[i].updateResults(minuend, subtrahend);
223 }
224 }
225 catch (IllegalArgumentException e) {
226 for (int i=0; i<iFieldSets.length; i++) {
227 iFieldSets[i].setResultsText("");
228 }
229 }
230 }
231
232 private class FieldGroup {
233 public final JCheckBox iCheckbox;
234 public final JTextField iResult;
235 public final int iFieldType;
236
237 FieldGroup(ItemListener listener, String checkboxText, int fieldType) {
238 iCheckbox = new JCheckBox (checkboxText, true);
239 iCheckbox.addItemListener(listener);
240 iResult = new JTextField ();
241 iResult.setEditable(false);
242 iFieldType = fieldType;
243 }
244
245 public long updateResult(long minuend, long subtrahend) {
246
249 DurationField field;
250 switch (iFieldType) {
251 case YEARS:
252 field = iChronology.years();
253 break;
254 case MONTHS:
255 field = iChronology.months();
256 break;
257 case DAYS:
258 field = iChronology.days();
259 break;
260 case WEEKYEARS:
261 field = iChronology.weekyears();
262 break;
263 case WEEKS:
264 field = iChronology.weeks();
265 break;
266 case HOURS:
267 field = iChronology.hours();
268 break;
269 case MINUTES:
270 field = iChronology.minutes();
271 break;
272 case SECONDS: default:
273 field = iChronology.seconds();
274 break;
275 }
276
277 String textToSet = "";
278
279 if (iCheckbox.isSelected()) {
280 long difference = field.getDifferenceAsLong(minuend, subtrahend);
281 textToSet = Long.toString(difference);
282 subtrahend = field.add(subtrahend, difference);
283 }
284
285 if (!iResult.getText().equals(textToSet)) {
286 iResult.setText(textToSet);
287 }
288
289 return subtrahend;
290 }
291
292 public void setResultText(String text) {
293 iResult.setText(text);
294 }
295 }
296
297 private static class FieldSet {
298 private final String iTitle;
299 private final FieldGroup[] iGroups;
300
301 FieldSet(String title, FieldGroup[] groups) {
302 iTitle = title;
303 iGroups = groups;
304 }
305
306 private long updateResults(long minuend, long subtrahend) {
307 for (int i=0; i<iGroups.length; i++) {
308 subtrahend = iGroups[i].updateResult(minuend, subtrahend);
309 }
310 return subtrahend;
311 }
312
313 public void setResultsText(String text) {
314 for (int i=0; i<iGroups.length; i++) {
315 iGroups[i].setResultText(text);
316 }
317 }
318
319 private void addTo(Container container) {
320 JPanel panel = new JPanel ();
321 GridBagLayout layout = new GridBagLayout ();
322 panel.setLayout(layout);
323
324 panel.setBorder(BorderFactory.createTitledBorder(iTitle));
325
326 for (int i=0; i<iGroups.length; i++) {
327 FieldGroup fg = iGroups[i];
328 panel.add(fg.iCheckbox);
329 setCheckboxConstraints(layout, fg.iCheckbox, 0, i);
330 panel.add(fg.iResult);
331 setResultConstraints(layout, fg.iResult, 1, i);
332 }
333
334 container.add(fixedHeight(panel));
335 }
336
337 private void setCheckboxConstraints(GridBagLayout layout, Component c,
338 int x, int y)
339 {
340 GridBagConstraints cons = new GridBagConstraints ();
341 cons.gridx = x;
342 cons.gridy = y;
343 cons.weightx = 0.1;
344 cons.anchor = GridBagConstraints.WEST;
345 layout.setConstraints(c, cons);
346 }
347
348 private void setResultConstraints(GridBagLayout layout, Component c,
349 int x, int y)
350 {
351 GridBagConstraints cons = new GridBagConstraints ();
352 cons.gridx = x;
353 cons.gridy = y;
354 cons.weightx = 1.0;
355 cons.anchor = GridBagConstraints.WEST;
356 cons.fill = GridBagConstraints.HORIZONTAL;
357 layout.setConstraints(c, cons);
358 }
359 }
360 }
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