javafx2 日期控件

package datecontrol; import java.text.DateFormat; import java.text.ParseException; import java.text.SimpleDateFormat; import java.util.Date; import java.util.Locale; import java.util.Timer; import java.util.TimerTask; import javafx.application.Platform; import javafx.beans.InvalidationListener; import javafx.beans.Observable; import javafx.beans.binding.StringBinding; import javafx.beans.property.BooleanProperty; import javafx.beans.property.ObjectProperty; import javafx.beans.property.ReadOnlyBooleanProperty; import javafx.beans.property.SimpleBooleanProperty; import javafx.beans.property.SimpleObjectProperty; import javafx.beans.property.SimpleStringProperty; import javafx.beans.property.StringProperty; import javafx.beans.value.ChangeListener; import javafx.beans.value.ObservableValue; import javafx.event.ActionEvent; import javafx.event.EventHandler; import javafx.geometry.Bounds; import javafx.scene.control.Button; import javafx.scene.control.TextField; import javafx.scene.effect.DropShadow; import javafx.scene.input.KeyCode; import javafx.scene.input.KeyEvent; import javafx.scene.input.MouseEvent; import javafx.scene.layout.HBox; import javafx.scene.layout.Priority; import javafx.stage.Popup; /** * @author Chain */ public class DatePicker extends HBox { private static final String CSS_DATE_PICKER_VALID = "datepicker-valid"; private static final String CSS_DATE_PICKER_INVALID = "datepicker-invalid"; /** * Initializes the date picker with the default locale. */ public DatePicker() { this(Locale.getDefault()); } private Timer timer; /** * Initializes the date picker with the given locale. * * @param locale * The locale. */ public DatePicker(Locale locale) { calendarView = new CalendarView(locale); textField = new TextField(); this.locale.set(locale); calendarView.setEffect(new DropShadow()); // Use the same locale. calendarView.localeProperty().bind(localeProperty()); // Bind the current date of the calendar view with the selected date, so // that the calendar shows up with the same month as in the text field. calendarView.currentDateProperty().bind(selectedDateProperty()); // When the user selects a date in the calendar view, hide it. calendarView.selectedDateProperty().addListener( new InvalidationListener() { @Override public void invalidated(Observable observable) { selectedDate.set(calendarView.selectedDateProperty() .get()); hidePopup(); } }); // Let the prompt text property listen to locale or date format changes. textField.promptTextProperty().bind(new StringBinding() { { super.bind(localeProperty(), promptTextProperty(), dateFormatProperty()); } @Override protected String computeValue() { // First check, if there is a custom prompt text. if (promptTextProperty().get() != null) { return promptTextProperty().get(); } // If not, use the the date format's pattern. DateFormat dateFormat = getActualDateFormat(); if (dateFormat instanceof SimpleDateFormat) { return ((SimpleDateFormat) dateFormat).toPattern(); } return ""; } }); // Change the CSS styles, when this control becomes invalid. invalid.addListener(new InvalidationListener() { @Override public void invalidated(Observable observable) { if (invalid.get()) { textField.getStyleClass().add(CSS_DATE_PICKER_INVALID); textField.getStyleClass().remove(CSS_DATE_PICKER_VALID); } else { textField.getStyleClass().remove(CSS_DATE_PICKER_INVALID); textField.getStyleClass().add(CSS_DATE_PICKER_VALID); } } }); // When the text field no longer has the focus, try to parse the date. textField.addEventHandler(MouseEvent.MOUSE_PRESSED, new EventHandler<MouseEvent>() { @Override public void handle(MouseEvent event) { if (!textField.focusedProperty().get()) { if (!textField.getText().equals("")) { tryParse(true); } } else { showPopup(); } } }); // Listen to user input. textField.textProperty().addListener(new ChangeListener<String>() { @Override public void changed( ObservableValue<? extends String> observableValue, String s, String s1) { // Only evaluate the input, it it wasn't set programmatically. if (textSetProgrammatically) { return; } if (timer != null) { timer.cancel(); } // If the user clears the text field, set the date to null and // the field to valid. if (s1.equals("")) { selectedDate.set(null); invalid.set(false); } else { // Start a timer, so that the user input is not evaluated // immediately, but after a second. // This way, input like 01/01/1 is not immediately parsed as // 01/01/01. // The user gets one second time, to complete his date, // maybe his intention was to enter 01/01/12. timer = new Timer(); timer.schedule(new TimerTask() { @Override public void run() { Platform.runLater(new Runnable() { @Override public void run() { tryParse(false); } }); } }, 1000); } } }); selectedDateProperty().addListener(new InvalidationListener() { @Override public void invalidated(Observable observable) { updateTextField(); invalid.set(false); } }); localeProperty().addListener(new InvalidationListener() { @Override public void invalidated(Observable observable) { updateTextField(); } }); textField.addEventHandler(KeyEvent.KEY_PRESSED, new EventHandler<KeyEvent>() { @Override public void handle(KeyEvent keyEvent) { if (keyEvent.getCode() == KeyCode.DOWN) { showPopup(); } } }); Button button = new Button(">"); button.setFocusTraversable(false); button.setOnAction(new EventHandler<ActionEvent>() { @Override public void handle(ActionEvent actionEvent) { showPopup(); } }); getChildren().add(textField); // getChildren().add(button); // ////////////////////////////////////////////////////////// // Lines added by Marco Jakob // ////////////////////////////////////////////////////////// HBox.setHgrow(textField, Priority.ALWAYS); // Pass style sheet changes to underlying CalendarView getStylesheets().addListener(new InvalidationListener() { @Override public void invalidated(Observable observable) { calendarView.getStylesheets().setAll(getStylesheets()); } }); } private void hidePopup() { if (popup != null) { popup.hide(); } } /** * Tries to parse the text field for a valid date. * * @param setDateToNullOnException * True, if the date should be set to null, when a * {@link ParseException} occurs. This is the case, when the text * field loses focus. */ private void tryParse(boolean setDateToNullOnException) { if (timer != null) { timer.cancel(); } try { // Double parse the date here, since e.g. 01.01.1 is parsed as year // 1, and then formatted as 01.01.01 and then parsed as year 2001. // This might lead to an undesired date. DateFormat dateFormat = getActualDateFormat(); Date parsedDate = dateFormat.parse(textField.getText()); parsedDate = dateFormat.parse(dateFormat.format(parsedDate)); if (selectedDate.get() == null || selectedDate.get() != null && parsedDate.getTime() != selectedDate.get().getTime()) { selectedDate.set(parsedDate); } invalid.set(false); updateTextField(); } catch (ParseException e) { invalid.set(true); if (setDateToNullOnException) { selectedDate.set(null); } }