我刚开始使用新的
JavaFX 8控件DatePicker.在
DatePicker User Experience Documentation中,它声称它有我想在GUI应用程序中使用的一些很酷的功能:
>我想将格式从mm / dd / yyyy更改为dd / mm / yyyy.
>我想限制可以选择的日期.用户只能从今天开始选择,直到明年的同一天.
>显示除原始日期之外的Hijri日期:
如何实现这些功能? JavaDoc并没有对它们说太多.
解决方法
这是完整的实现:
import java.net.URL; import java.time.LocalDate; import java.time.chrono.HijrahChronology; import java.time.format.DateTimeFormatter; import java.util.ResourceBundle; import javafx.application.Platform; import javafx.fxml.FXML; import javafx.fxml.Initializable; import javafx.scene.control.DateCell; import javafx.scene.control.DatePicker; import javafx.scene.control.Label; import javafx.scene.input.MouseEvent; import javafx.util.Callback; import javafx.util.StringConverter; /** * * @author Fouad */ public class FXMLDocumentController implements Initializable { @FXML private DatePicker dpDate; @Override public void initialize(URL url,ResourceBundle rb) { dpDate.setValue(LocalDate.now()); dpDate.setChronology(HijrahChronology.INSTANCE); Callback<DatePicker,DateCell> dayCellFactory = dp -> new DateCell() { @Override public void updateItem(LocalDate item,boolean empty) { super.updateItem(item,empty); if(item.isBefore(LocalDate.now()) || item.isAfter(LocalDate.now().plusYears(1))) { setStyle("-fx-background-color: #ffc0cb;"); Platform.runLater(() -> setDisable(true)); /* When Hijri Dates are shown,setDisable() doesn't work. Here is a workaround */ //addEventFilter(MouseEvent.MOUSE_CLICKED,e -> e.consume()); } } }; StringConverter<LocalDate> converter = new StringConverter<LocalDate>() { final DateTimeFormatter dateFormatter = DateTimeFormatter.ofPattern("dd/MM/yyyy"); @Override public String toString(LocalDate date) { if(date != null) return dateFormatter.format(date); else return ""; } @Override public LocalDate fromString(String string) { if(string != null && !string.isEmpty()) { LocalDate date = LocalDate.parse(string,dateFormatter); if(date.isBefore(LocalDate.now()) || date.isAfter(LocalDate.now().plusYears(1))) { return dpDate.getValue(); } else return date; } else return null; } }; dpDate.setDayCellFactory(dayCellFactory); dpDate.setConverter(converter); dpDate.setPromptText("dd/MM/yyyy"); } }