JavaFx:ComboBox编辑器的文本 [英] JavaFx: ComboBox editor's text

问题描述

我正在使用此答案中建议的comboBox: JavaFx:显示DatePicker ，但我无法显示正确的文本.如果我从DatePicker中选择一个日期，则尝试设置编辑器的文本，但是什么也没发生.这是我尝试过的:

I am using the comboBox suggested in this answer: JavaFx: show DatePicker, but I have a problem displaying the correct text. If I chose a date from DatePicker I tried to set the editor's text but it happens nothing. This is what I have tried:

getSelectionModel().selectedItemProperty().addListener((observable, oldValue, newValue) ->{
    if (newValue != null) {
        if (MyTupe.DATE.equals(newValue.getType())) {
            initDatePicker();
            datePicker.valueProperty().addListener((obs, oldDate, newDate) -> {
                newValue.setValue(newDate);
                getEditor().setText(newDate.toString());
                datePopOver.hide();
            });
            StackPane stackPane = new StackPane(datePicker);
            stackPane.setPadding(new Insets(10, 10, 10, 10));

            datePopOver.setContentNode(stackPane);
            datePopOver.show(this);
        } else {
            datePopOver.hide();
        }
    }
});

经过大量实验后，我将两个事件添加到编辑器的textProperty和setOnMouseClicked中，如下所示:

After experimenting a lot I added two events to the editor's textProperty and setOnMouseClicked like this:

getEditor().textProperty().addListener((observable, oldValue, newValue) -> {
    System.out.println("Text changed");
});
setOnMouseClicked(event -> {
    System.out.println(getEditor().getText());
});

如果不手动设置 getEditor().setText(); ，则不会触发First，即使我更改了comboBox的值，这对我来说还是有点奇怪，因为我以为这个textField可以保存comboBox的文本.(也许我错了吗?).如果删除该行，则每次显示一个空字符串时都会显示mouseClick事件.如果 getEditor().setText(); 行存在，则编辑器的getText()返回正确的文本，但不会显示在comboBox中.

First is not triggered if I don't set manually getEditor().setText(); even if I change the value of the comboBox, that is a little bit weird for me, because I thought this textField holds the text of the comboBox.(maybe am I wrong??). The mouseClick event displays every time an empty string if that line is removed. If the getEditor().setText(); line is there the editor's getText() returns the correct text but it is not displayed in comboBox.

问题:

• comboBox的文本存储在哪里?
• 如何更改selectedItemProperty的侦听器中的文本?

我认为也许我在某个地方犯了一个错误，所以这就是为什么它不起作用，但是我不知道该怎么办，您能帮我吗?

I assume that maybe I did somewhere a mistake so that's why this is not working, but I have no idea what, can you help me?

推荐答案

在链接的代码中

替换:

items.set(0, new ComboBoxNode(newDate, DATE_TYPE));

具有:

items.set(customComboBox.getSelectionModel().getSelectedIndex(), new ComboBoxNode(newDate, DATE_TYPE));

链接的代码仅更改零位置的日期.在此新代码中，相应位置的日期已更改.

The linked code only changes the date at location zero. In this new code, the date in the appropriate location is changed.

完整代码:

import java.time.LocalDate;
import java.time.Month;
import java.util.Objects;
import javafx.application.Application;
import javafx.collections.FXCollections;
import javafx.collections.ObservableList;
import javafx.geometry.Insets;
import javafx.scene.Scene;
import javafx.scene.control.ComboBox;
import javafx.scene.control.DatePicker;
import javafx.scene.layout.FlowPane;
import javafx.scene.layout.StackPane;
import javafx.stage.Stage;
import org.controlsfx.control.PopOver;

/**
 *
 * @author blj0011
 */
public class JavaFXApplication155 extends Application
{

    private static final String DATE_TYPE = "DATE";

    private class ComboBoxNode {
        private final Object value;
        private final String type;

        private ComboBoxNode(final Object value, final String type) {
            this.value = value;
            this.type = type;
        }

        @Override
        public String toString() {
            return Objects.toString(value);
        }
    }

    public static void main(String[] args) {
        launch(args);
    }

    @Override
    public void start(Stage primaryStage) {
        final ObservableList<ComboBoxNode> items =
                FXCollections.observableArrayList(
                        new ComboBoxNode(LocalDate.now(), DATE_TYPE),
                        new ComboBoxNode(LocalDate.of(2017, Month.APRIL, 15), DATE_TYPE),//Added new date to ComboBox
                        new ComboBoxNode("11:35AM", "TIME"));

        final PopOver datePopOver = new PopOver();
        datePopOver.setTitle("Enter new date");
        datePopOver.setCornerRadius(10);
        datePopOver.setHeaderAlwaysVisible(true);
        //datePopOver.set(true);
        datePopOver.setAutoHide(true);

        final ComboBox<ComboBoxNode> customComboBox = new ComboBox<>(items);


        customComboBox.getSelectionModel().selectedItemProperty().addListener((o, old, newNode) -> {
            if (newNode != null) {
                if (newNode.type.equals(DATE_TYPE)) {
                    final DatePicker datePicker = new DatePicker((LocalDate) newNode.value);
                    datePicker.valueProperty().addListener((obs, oldDate, newDate) -> {
                        items.set(customComboBox.getSelectionModel().getSelectedIndex(), new ComboBoxNode(newDate, DATE_TYPE));//Fixed this line of code
                        datePopOver.hide();
                    });

                    final StackPane stackPane = new StackPane(datePicker);
                    stackPane.setPadding(new Insets(10, 10, 10, 10));

                    datePopOver.setContentNode(stackPane);
                    datePopOver.show(customComboBox);
                } else {
                    datePopOver.hide();
                }
            }
        });

        final FlowPane pane = new FlowPane(customComboBox);
        pane.setPadding(new Insets(10, 10, 10, 10));
        pane.setPrefWidth(400);
        pane.setPrefHeight(300);

        // Show Scene
        final Scene scene = new Scene(pane);
        primaryStage.setTitle("Popup calendar");
        primaryStage.setScene(scene);
        primaryStage.show();
    }
}

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