函数setOnKeyPressed在Javafx中的DatePicker上不起作用？ [英] Function setOnKeyPressed is not working on DatePicker in Javafx?

问题描述

函数setOnKeyPressed在DatePicker上不起作用。我想在按下Enter或Down键时将焦点从第一个datepicker（startYear）更改为第二个datepicker（endyear），但它不起作用。
我试过以下代码。请帮帮我...... !!

Function setOnKeyPressed is not working on DatePicker. I want to change the focus from first datepicker(startYear) to second datepicker(endyear) whenever Enter or Down key is pressed, but its not working. I'hv tried the following code. Please help me out...!!

package datedemo;

import com.sun.javafx.robot.FXRobot;
import com.sun.javafx.robot.FXRobotFactory;
import java.time.LocalDate;
import java.time.format.DateTimeFormatter;
import java.util.Calendar;
import javafx.application.Application;
import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.DatePicker;
import javafx.scene.control.Label;
import javafx.scene.input.KeyCode;
import javafx.scene.input.KeyEvent;
import javafx.scene.layout.Priority;
import javafx.scene.layout.StackPane;
import javafx.scene.layout.VBox;
import javafx.stage.Stage;

/**
 *
 * @author vikassingh
 */
public class DateDemo extends Application {

    DatePicker startYear = new DatePicker();
    DatePicker endYear = new DatePicker();

    @Override
    public void start(Stage primaryStage) {
        /* Button btn = new Button();
         btn.setText("Say 'Hello World'");
         btn.setOnAction(new EventHandler<ActionEvent>() {

         @Override
         public void handle(ActionEvent event) {
         System.out.println("Hello World!");
         }
         }); */

        // Year Start and END 
        int start_year = 0;
        int end_year = 0;
        Calendar cal = Calendar.getInstance();
        int year = cal.get(cal.YEAR);
        int month = cal.get(cal.MONTH) + 1; //zero-based
        System.out.println("year = " + year + "\nmonth = " + month);
        if (month < 4) {
            start_year = year - 1;
            end_year = year;
        } else {
            start_year = year;
            end_year = year + 1;
        }

        String start_year_date = "01/04/" + start_year;
        String end_year_date = "31/03/" + end_year;

        //Get Start & End Date;
        DateTimeFormatter formatter = DateTimeFormatter.ofPattern("dd/MM/yyyy");
        LocalDate startDate = LocalDate.parse(start_year_date, formatter);
        LocalDate endDate = LocalDate.parse(end_year_date, formatter);

        VBox box = new VBox();
        VBox.setVgrow(box, Priority.ALWAYS);

        Label startYearLabel = new Label("Start Year * :");
        box.getChildren().add(startYearLabel);

        startYear.setValue(startDate);
        startYear.setPromptText("DD/MM/YYYY");
        box.getChildren().add(startYear);
        Label endYearLabel = new Label("End Year * :");
        box.getChildren().add(endYearLabel);
        endYear.setValue(endDate);
        endYear.setPromptText("DD/MM/YYYY");
        box.getChildren().add(endYear);

        StackPane root = new StackPane();
        root.getChildren().add(box);

        Scene scene = new Scene(root, 300, 250);

        primaryStage.setTitle("Date Demo");
        primaryStage.setScene(scene);
        primaryStage.show();

        // Listner
        startYear.setOnKeyPressed(new EventHandler<KeyEvent>() {
            public void handle(KeyEvent event) {
                if (event.getCode() == KeyCode.ENTER || event.getCode() == KeyCode.TAB || event.getCode() == KeyCode.DOWN) {
                    endYear.requestFocus();
                    event.consume();
                }
                if (event.getCode() == KeyCode.UP) {
                    // do something
                    event.consume();
                }
            }
        });

        endYear.setOnKeyPressed(new EventHandler<KeyEvent>() {
            public void handle(KeyEvent event) {
                if (event.getCode() == KeyCode.ENTER || event.getCode() == KeyCode.TAB || event.getCode() == KeyCode.DOWN) {
                   // do something
                    event.consume();
                }
                if (event.getCode() == KeyCode.UP) {
                    startYear.requestFocus();
                    event.consume();
                }
            }
        });
    }

    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {
        launch(args);
    }

}

推荐答案

使用 EventFilter ，i。 e。

startYear.addEventFilter(KeyEvent.KEY_PRESSED, event -> {
...
});

endYear.addEventFilter(KeyEvent.KEY_PRESSED, event -> {
...
});

i。 e。

startYear.addEventFilter(KeyEvent.KEY_PRESSED, event -> {

        if (event.getCode() == KeyCode.ENTER || event.getCode() == KeyCode.TAB || event.getCode() == KeyCode.DOWN) {
            endYear.requestFocus();
            event.consume();
        }
        if (event.getCode() == KeyCode.UP) {
            // do something
            event.consume();
        }
});

endYear.addEventFilter(KeyEvent.KEY_PRESSED, event -> {
        if (event.getCode() == KeyCode.ENTER || event.getCode() == KeyCode.TAB || event.getCode() == KeyCode.DOWN) {
           // do something
            event.consume();
        }
        if (event.getCode() == KeyCode.UP) {
            startYear.requestFocus();
            event.consume();
        }
});

这篇关于函数setOnKeyPressed在Javafx中的DatePicker上不起作用？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！