1 /*
2 * Copyright (c) 2013, 2016, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26 package javafx.scene.control;
27
28 // editor and converter code in sync with ComboBox 4858:e60e9a5396e6
29
30 import java.time.LocalDate;
31 import java.time.DateTimeException;
32 import java.time.chrono.Chronology;
33 import java.time.chrono.IsoChronology;
34 import java.time.format.FormatStyle;
35 import java.util.ArrayList;
36 import java.util.Collections;
37 import java.util.List;
38 import java.util.Locale;
39
40 import com.sun.javafx.scene.control.FakeFocusTextField;
41
42 import javafx.beans.property.BooleanProperty;
43 import javafx.beans.property.ObjectProperty;
44 import javafx.beans.property.ReadOnlyObjectProperty;
45 import javafx.beans.property.ReadOnlyObjectWrapper;
46 import javafx.beans.property.SimpleObjectProperty;
47 import javafx.beans.value.WritableValue;
48 import javafx.css.CssMetaData;
49 import javafx.css.Styleable;
50 import javafx.css.StyleableBooleanProperty;
51 import javafx.css.StyleableProperty;
52 import javafx.scene.AccessibleAttribute;
53 import javafx.scene.AccessibleRole;
54 import javafx.util.Callback;
55 import javafx.util.StringConverter;
56 import javafx.util.converter.LocalDateStringConverter;
57
58 import javafx.css.converter.BooleanConverter;
59 import javafx.scene.control.skin.DatePickerSkin;
60 import com.sun.javafx.scene.control.skin.resources.ControlResources;
61
62
63 /**
64 * The DatePicker control allows the user to enter a date as text or
65 * to select a date from a calendar popup. The calendar is based on
66 * either the standard ISO-8601 chronology or any of the other
67 * chronology classes defined in the java.time.chrono package.
68 *
69 * <p>The {@link #valueProperty() value} property represents the
70 * currently selected {@link java.time.LocalDate}. An initial date can
71 * be set via the {@link #DatePicker(java.time.LocalDate) constructor}
72 * or by calling {@link #setValue(java.time.LocalDate) setValue()}. The
73 * default value is null.
74 *
75 * <pre><code>
76 * final DatePicker datePicker = new DatePicker();
77 * datePicker.setOnAction(new EventHandler() {
78 * public void handle(Event t) {
79 * LocalDate date = datePicker.getValue();
80 * System.err.println("Selected date: " + date);
81 * }
82 * });
83 * </code></pre>
84 *
85 * The {@link #chronologyProperty() chronology} property specifies a
86 * calendar system to be used for parsing, displaying, and choosing
87 * dates.
88 * The {@link #valueProperty() value} property is always defined in
89 * the ISO calendar system, however, so applications based on a
90 * different chronology may use the conversion methods provided in the
91 * {@link java.time.chrono.Chronology} API to get or set the
92 * corresponding {@link java.time.chrono.ChronoLocalDate} value. For
93 * example:
94 *
95 * <pre><code>
96 * LocalDate isoDate = datePicker.getValue();
97 * ChronoLocalDate chronoDate =
98 * ((isoDate != null) ? datePicker.getChronology().date(isoDate) : null);
99 * System.err.println("Selected date: " + chronoDate);
100 * </code></pre>
101 *
102 *
103 * @since JavaFX 8.0
104 */
105 public class DatePicker extends ComboBoxBase<LocalDate> {
106
107 private LocalDate lastValidDate = null;
108 private Chronology lastValidChronology = IsoChronology.INSTANCE;
109
110 /**
111 * Creates a default DatePicker instance with a <code>null</code> date value set.
112 */
113 public DatePicker() {
114 this(null);
115
116 valueProperty().addListener(observable -> {
117 LocalDate date = getValue();
118 Chronology chrono = getChronology();
119
120 if (validateDate(chrono, date)) {
121 lastValidDate = date;
122 } else {
123 System.err.println("Restoring value to " +
124 ((lastValidDate == null) ? "null" : getConverter().toString(lastValidDate)));
125 setValue(lastValidDate);
126 }
127 });
128
129 chronologyProperty().addListener(observable -> {
130 LocalDate date = getValue();
131 Chronology chrono = getChronology();
132
133 if (validateDate(chrono, date)) {
134 lastValidChronology = chrono;
135 defaultConverter = new LocalDateStringConverter(FormatStyle.SHORT, null, chrono);
136 } else {
137 System.err.println("Restoring value to " + lastValidChronology);
138 setChronology(lastValidChronology);
139 }
140 });
141 }
142
143 private boolean validateDate(Chronology chrono, LocalDate date) {
144 try {
145 if (date != null) {
146 chrono.date(date);
147 }
148 return true;
149 } catch (DateTimeException ex) {
150 System.err.println(ex);
151 return false;
152 }
153 }
154
155 /**
156 * Creates a DatePicker instance and sets the
157 * {@link #valueProperty() value} to the given date.
158 *
159 * @param localDate to be set as the currently selected date in the DatePicker. Can be null.
160 */
161 public DatePicker(LocalDate localDate) {
162 setValue(localDate);
163 getStyleClass().add(DEFAULT_STYLE_CLASS);
164 setAccessibleRole(AccessibleRole.DATE_PICKER);
165 setEditable(true);
166 }
167
168
169 /***************************************************************************
170 * *
171 * Properties *
172 * *
173 **************************************************************************/
174
175
176 /**
177 * A custom cell factory can be provided to customize individual
178 * day cells in the DatePicker popup. Refer to {@link DateCell}
179 * and {@link Cell} for more information on cell factories.
180 * Example:
181 *
182 * <pre><code>
183 * final Callback<DatePicker, DateCell> dayCellFactory = new Callback<DatePicker, DateCell>() {
184 * public DateCell call(final DatePicker datePicker) {
185 * return new DateCell() {
186 * @Override public void updateItem(LocalDate item, boolean empty) {
187 * super.updateItem(item, empty);
188 *
189 * if (MonthDay.from(item).equals(MonthDay.of(9, 25))) {
190 * setTooltip(new Tooltip("Happy Birthday!"));
191 * setStyle("-fx-background-color: #ff4444;");
192 * }
193 * if (item.equals(LocalDate.now().plusDays(1))) {
194 * // Tomorrow is too soon.
195 * setDisable(true);
196 * }
197 * }
198 * };
199 * }
200 * };
201 * datePicker.setDayCellFactory(dayCellFactory);
202 * </code></pre>
203 *
204 * @defaultValue null
205 */
206 private ObjectProperty<Callback<DatePicker, DateCell>> dayCellFactory;
207 public final void setDayCellFactory(Callback<DatePicker, DateCell> value) {
208 dayCellFactoryProperty().set(value);
209 }
210 public final Callback<DatePicker, DateCell> getDayCellFactory() {
211 return (dayCellFactory != null) ? dayCellFactory.get() : null;
212 }
213 public final ObjectProperty<Callback<DatePicker, DateCell>> dayCellFactoryProperty() {
214 if (dayCellFactory == null) {
215 dayCellFactory = new SimpleObjectProperty<Callback<DatePicker, DateCell>>(this, "dayCellFactory");
216 }
217 return dayCellFactory;
218 }
219
220
221
222 /**
223 * The calendar system used for parsing, displaying, and choosing
224 * dates in the DatePicker control.
225 *
226 * <p>The default value is returned from a call to
227 * {@code Chronology.ofLocale(Locale.getDefault(Locale.Category.FORMAT))}.
228 * The default is usually {@link java.time.chrono.IsoChronology} unless
229 * provided explicitly in the {@link java.util.Locale} by use of a
230 * Locale calendar extension.
231 *
232 * Setting the value to <code>null</code> will restore the default
233 * chronology.
234 * @return the calendar system
235 */
236 public final ObjectProperty<Chronology> chronologyProperty() {
237 return chronology;
238 }
239 private ObjectProperty<Chronology> chronology =
240 new SimpleObjectProperty<Chronology>(this, "chronology", null);
241 public final Chronology getChronology() {
242 Chronology chrono = chronology.get();
243 if (chrono == null) {
244 try {
245 chrono = Chronology.ofLocale(Locale.getDefault(Locale.Category.FORMAT));
246 } catch (Exception ex) {
247 System.err.println(ex);
248 }
249 if (chrono == null) {
250 chrono = IsoChronology.INSTANCE;
251 }
252 //System.err.println(chrono);
253 }
254 return chrono;
255 }
256 public final void setChronology(Chronology value) {
257 chronology.setValue(value);
258 }
259
260
261 /**
262 * Whether the DatePicker popup should display a column showing
263 * week numbers.
264 *
265 * <p>The default value is specified in a resource bundle, and
266 * depends on the country of the current locale.
267 * @return true if popup should display a column showing
268 * week numbers
269 */
270 public final BooleanProperty showWeekNumbersProperty() {
271 if (showWeekNumbers == null) {
272 String country = Locale.getDefault(Locale.Category.FORMAT).getCountry();
273 boolean localizedDefault =
274 (!country.isEmpty() &&
275 ControlResources.getNonTranslatableString("DatePicker.showWeekNumbers").contains(country));
276 showWeekNumbers = new StyleableBooleanProperty(localizedDefault) {
277 @Override public CssMetaData<DatePicker,Boolean> getCssMetaData() {
278 return StyleableProperties.SHOW_WEEK_NUMBERS;
279 }
280
281 @Override public Object getBean() {
282 return DatePicker.this;
283 }
284
285 @Override public String getName() {
286 return "showWeekNumbers";
287 }
288 };
289 }
290 return showWeekNumbers;
291 }
292 private BooleanProperty showWeekNumbers;
293 public final void setShowWeekNumbers(boolean value) {
294 showWeekNumbersProperty().setValue(value);
295 }
296 public final boolean isShowWeekNumbers() {
297 return showWeekNumbersProperty().getValue();
298 }
299
300
301 // --- string converter
302 /**
303 * Converts the input text to an object of type LocalDate and vice
304 * versa.
305 *
306 * <p>If not set by the application, the DatePicker skin class will
307 * set a converter based on a {@link java.time.format.DateTimeFormatter}
308 * for the current {@link java.util.Locale} and
309 * {@link #chronologyProperty() chronology}. This formatter is
310 * then used to parse and display the current date value.
311 *
312 * Setting the value to <code>null</code> will restore the default
313 * converter.
314 *
315 * <p>Example using an explicit formatter:
316 * <pre><code>
317 * datePicker.setConverter(new StringConverter<LocalDate>() {
318 * String pattern = "yyyy-MM-dd";
319 * DateTimeFormatter dateFormatter = DateTimeFormatter.ofPattern(pattern);
320 *
321 * {
322 * datePicker.setPromptText(pattern.toLowerCase());
323 * }
324 *
325 * {@literal @Override public String toString(LocalDate date) {
326 * if (date != null) {
327 * return dateFormatter.format(date);
328 * } else {
329 * return "";
330 * }
331 * }}
332 *
333 * {@literal @Override public LocalDate fromString(String string) {
334 * if (string != null && !string.isEmpty()) {
335 * return LocalDate.parse(string, dateFormatter);
336 * } else {
337 * return null;
338 * }
339 * }}
340 * });
341 * </code></pre>
342 * <p>Example that wraps the default formatter and catches parse exceptions:
343 * <pre><code>
344 * final StringConverter<LocalDate> defaultConverter = datePicker.getConverter();
345 * datePicker.setConverter(new StringConverter<LocalDate>() {
346 * @Override public String toString(LocalDate value) {
347 * return defaultConverter.toString(value);
348 * }
349 *
350 * @Override public LocalDate fromString(String text) {
351 * try {
352 * return defaultConverter.fromString(text);
353 * } catch (DateTimeParseException ex) {
354 * System.err.println("HelloDatePicker: "+ex.getMessage());
355 * throw ex;
356 * }
357 * }
358 * });
359 * </code></pre>
360 *
361 * <p>The default base year for parsing input containing only two digits for
362 * the year is 2000 (see {@link java.time.format.DateTimeFormatter}). This
363 * default is not useful for allowing a person's date of birth to be typed.
364 * The following example modifies the converter's fromString() method to
365 * allow a two digit year for birth dates up to 99 years in the past.
366 * <pre><code>
367 * {@literal @Override public LocalDate fromString(String text) {
368 * if (text != null && !text.isEmpty()) {
369 * Locale locale = Locale.getDefault(Locale.Category.FORMAT);
370 * Chronology chrono = datePicker.getChronology();
371 * String pattern =
372 * DateTimeFormatterBuilder.getLocalizedDateTimePattern(FormatStyle.SHORT,
373 * null, chrono, locale);
374 * String prePattern = pattern.substring(0, pattern.indexOf("y"));
375 * String postPattern = pattern.substring(pattern.lastIndexOf("y")+1);
376 * int baseYear = LocalDate.now().getYear() - 99;
377 * DateTimeFormatter df = new DateTimeFormatterBuilder()
378 * .parseLenient()
379 * .appendPattern(prePattern)
380 * .appendValueReduced(ChronoField.YEAR, 2, 2, baseYear)
381 * .appendPattern(postPattern)
382 * .toFormatter();
383 * return LocalDate.from(chrono.date(df.parse(text)));
384 * } else {
385 * return null;
386 * }
387 * }}
388 * </code></pre>
389 *
390 * @return the string converter of type LocalDate
391 * @see javafx.scene.control.ComboBox#converterProperty
392 */
393 public final ObjectProperty<StringConverter<LocalDate>> converterProperty() { return converter; }
394 private ObjectProperty<StringConverter<LocalDate>> converter =
395 new SimpleObjectProperty<StringConverter<LocalDate>>(this, "converter", null);
396 public final void setConverter(StringConverter<LocalDate> value) { converterProperty().set(value); }
397 public final StringConverter<LocalDate> getConverter() {
398 StringConverter<LocalDate> converter = converterProperty().get();
399 if (converter != null) {
400 return converter;
401 } else {
402 return defaultConverter;
403 }
404 }
405
406 // Create a symmetric (format/parse) converter with the default locale.
407 private StringConverter<LocalDate> defaultConverter =
408 new LocalDateStringConverter(FormatStyle.SHORT, null, getChronology());
409
410
411 // --- Editor
412 /**
413 * The editor for the DatePicker.
414 *
415 * @see javafx.scene.control.ComboBox#editorProperty
416 */
417 private ReadOnlyObjectWrapper<TextField> editor;
418 public final TextField getEditor() {
419 return editorProperty().get();
420 }
421 public final ReadOnlyObjectProperty<TextField> editorProperty() {
422 if (editor == null) {
423 editor = new ReadOnlyObjectWrapper<>(this, "editor");
424 editor.set(new FakeFocusTextField());
425 }
426 return editor.getReadOnlyProperty();
427 }
428
429 /** {@inheritDoc} */
430 @Override protected Skin<?> createDefaultSkin() {
431 return new DatePickerSkin(this);
432 }
433
434
435 /***************************************************************************
436 * *
437 * Stylesheet Handling *
438 * *
439 **************************************************************************/
440
441 private static final String DEFAULT_STYLE_CLASS = "date-picker";
442
443 private static class StyleableProperties {
444 private static final String country =
445 Locale.getDefault(Locale.Category.FORMAT).getCountry();
446 private static final CssMetaData<DatePicker, Boolean> SHOW_WEEK_NUMBERS =
447 new CssMetaData<DatePicker, Boolean>("-fx-show-week-numbers",
448 BooleanConverter.getInstance(),
449 (!country.isEmpty() &&
450 ControlResources.getNonTranslatableString("DatePicker.showWeekNumbers").contains(country))) {
451 @Override public boolean isSettable(DatePicker n) {
452 return n.showWeekNumbers == null || !n.showWeekNumbers.isBound();
453 }
454
455 @Override public StyleableProperty<Boolean> getStyleableProperty(DatePicker n) {
456 return (StyleableProperty<Boolean>)(WritableValue<Boolean>)n.showWeekNumbersProperty();
457 }
458 };
459
460 private static final List<CssMetaData<? extends Styleable, ?>> STYLEABLES;
461
462 static {
463 final List<CssMetaData<? extends Styleable, ?>> styleables =
464 new ArrayList<CssMetaData<? extends Styleable, ?>>(Control.getClassCssMetaData());
465 Collections.addAll(styleables,
466 SHOW_WEEK_NUMBERS
467 );
468 STYLEABLES = Collections.unmodifiableList(styleables);
469 }
470 }
471
472 /**
473 * @return The CssMetaData associated with this class, which may include the
474 * CssMetaData of its superclasses.
475 */
476 public static List<CssMetaData<? extends Styleable, ?>> getClassCssMetaData() {
477 return StyleableProperties.STYLEABLES;
478 }
479
480 /**
481 * {@inheritDoc}
482 * @since JavaFX 8.0
483 */
484 @Override
485 public List<CssMetaData<? extends Styleable, ?>> getControlCssMetaData() {
486 return getClassCssMetaData();
487 }
488
489 /***************************************************************************
490 * *
491 * Accessibility handling *
492 * *
493 **************************************************************************/
494
495 @Override
496 public Object queryAccessibleAttribute(AccessibleAttribute attribute, Object... parameters) {
497 switch (attribute) {
498 case DATE: return getValue();
499 case TEXT: {
500 String accText = getAccessibleText();
501 if (accText != null && !accText.isEmpty()) return accText;
502
503 LocalDate date = getValue();
504 StringConverter<LocalDate> c = getConverter();
505 if (date != null && c != null) {
506 return c.toString(date);
507 }
508 return "";
509 }
510 default: return super.queryAccessibleAttribute(attribute, parameters);
511 }
512 }
513
514 }