JavaFX datepicker不更新值

Question

有点奇怪，我正在使用JavaFX 8，并且在Jubulahtml" target="_blank">测试期间发现了一些奇怪的行为。

我有一个使用以下代码创建的datepicker控件：

public DatePicker getDatePicker(DtDate defaultDate, int width){
    DatePicker dtpckr = new DatePicker();
    dtpckr.setMaxWidth(width);
    dtpckr.setMinWidth(width);
    dtpckr.setConverter(new StringConverter<LocalDate>() {
        private DateTimeFormatter dateTimeFormatter=DateTimeFormatter.ofPattern("yyyy/MM/dd");
        @Override
        public String toString(LocalDate localDate) {
            if(localDate==null)
                return "";
            return dateTimeFormatter.format(localDate);
        }
        @Override
        public LocalDate fromString(String dateString) {
            if(dateString==null || dateString.trim().isEmpty())
                return null;
            return LocalDate.parse(dateString,dateTimeFormatter);
        }
    });
    dtpckr.setPromptText("yyyy/MM/dd");
    dtpckr.setValue(LocalDate.parse(defaultDate.toString(), DateTimeFormatter.ofPattern("yyyy/MM/dd")));
    return dtpckr;
}

效果很好，控件在窗体上创建并按预期工作。如果我使用日历来选择日期，则值会更新。

现在，对于奇怪的部分，如果我输入日期选择器并在（例如2017/10/11）中手动键入日期，然后通过制表符或单击表单上的下一个文本框来退出控件，则日期选择器localdate值不会不会更新。更新日期的唯一方法是按Enter键，以迫使日期选择器意识到存在一个新值。这会导致另一个问题，因为我有以下代码：

public void createSetDateAndTimeControls(){
    DtDateAndTime currentDateAndTime;
    try {
        currentDateAndTime = systemstateController.getServerDateTime();
        /*
         * Creating controls to be used on the form
         */
        int width = 150;
        DatePicker dtpckr = getDatePicker(currentDateAndTime.date, width);
        Label lblDate = new Label("Date:");
        Label lblTimeHour = new Label("Hour:");
        Label lblTimeMinute = new Label("Minute:");
        Label lblTimeSecond = new Label("Second:");
        TextField txtfldCurrentSetSecond = new TextField();
        TextField txtfldCurrentSetMinute = new TextField();
        TextField txtfldCurrentSetHour = new TextField();
        Slider sldrHourPicker = getSlider(width, SliderType.Hour, txtfldCurrentSetHour, currentDateAndTime.time);
        Slider sldrMinutePicker = getSlider(width, SliderType.Minute, txtfldCurrentSetMinute, currentDateAndTime.time);
        Slider sldrSecondPicker = getSlider(width, SliderType.Second, txtfldCurrentSetSecond, currentDateAndTime.time);
        /*
         * Adding a grid pane to keep controls in correct place and aligned correctly
         */
        GridPane grdpn = new GridPane();
        grdpn.add(lblDate, 1, 1);
        grdpn.add(dtpckr, 2, 1, 2,1);
        grdpn.add(lblTimeHour, 1, 2);
        grdpn.add(sldrHourPicker, 2, 2, 2 ,1);
        grdpn.add(txtfldCurrentSetHour, 4, 2);
        grdpn.add(lblTimeMinute, 1, 3);
        grdpn.add(sldrMinutePicker, 2, 3, 2, 1);
        grdpn.add(txtfldCurrentSetMinute, 4, 3);
        grdpn.add(lblTimeSecond, 1, 4);
        grdpn.add(sldrSecondPicker, 2, 4, 2, 1);
        grdpn.add(txtfldCurrentSetSecond, 4, 4);
        /*
         * Creating buttons for user to press
         */
        Button bttnOK = new Button("Change date and time");
        bttnOK.setOnAction(new EventHandler<ActionEvent>() {
            @Override
            public void handle(ActionEvent event) {
                try {
                    if (checkIfAllDialogHasBeenFilledIn(grdpn)){
                        LocalDate test = dtpckr.getValue();
                        if (systemstateController.oeSetClock(ICrashUtils.setDateAndTime(dtpckr.getValue().getYear(), dtpckr.getValue().getMonthValue(), dtpckr.getValue().getDayOfMonth(),
                                (int)Math.floor(sldrHourPicker.getValue()), (int)Math.floor(sldrMinutePicker.getValue()), (int)Math.floor(sldrSecondPicker.getValue()))).getValue())
                            showOKMessage("Updated", "Date and time was updated successfully");
                        else
                            showErrorMessage("Error", "There was an error updating the date and time");
                    }
                    else
                        showUserCancelledActionPopup();
                } catch (ServerOfflineException | ServerNotBoundException e) {
                    showExceptionErrorMessage(e);
                }
            }
        });
        bttnOK.setDefaultButton(true);
        grdpn.add(bttnOK, 2, 5, 3, 1);
        Button bttnSetNow = new Button("Now");
        bttnSetNow.setOnAction(new EventHandler<ActionEvent>() {
            @Override
            public void handle(ActionEvent event) {
                dtpckr.setValue(LocalDate.now());
                LocalTime time = LocalTime.now();
                sldrHourPicker.setValue(time.getHour());
                sldrMinutePicker.setValue(time.getMinute());
                sldrSecondPicker.setValue(time.getSecond());
            }
        });

        grdpn.add(bttnSetNow, 4, 1);
        /*
         * End of creating controls to be used on the form
         */
        anchrpnActivator.getChildren().add(grdpn);
        AnchorPane.setTopAnchor(grdpn, 0.0);
        AnchorPane.setRightAnchor(grdpn, 0.0);
        AnchorPane.setLeftAnchor(grdpn, 0.0);
        AnchorPane.setBottomAnchor(grdpn, 0.0);
    } catch (ServerOfflineException | ServerNotBoundException e) {
        showExceptionErrorMessage(e);
    }
}

其中包含以下行：

bttnOK.setDefaultButton(true);

这意味着，如果用户在日期选择器控件上的文本输入过程中按Enter键，则会onaction在用户将数据放入其他控件中之前触发该事件，我并不特别希望这样做。

所以问题是，dtpckr.getValue()如果用户在框中输入文本然后不按Enter就离开框，为什么不做更改？我找不到要离开用户的日期选择器框或日期选择器属性的事件来获取控件的文本值并将其与的值进行比较dtpckr.getValue()。我在这里想念什么吗？

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[编辑]

看来这可能是JavaFX当前datepicker设置中的错误

我可能必须删除默认按钮，并在Jubula测试中放入回车键，以使其正常工作。除非有人有其他选择？

Answer 1

我在上面添加的错误日志给出了答案。您可以通过以下代码访问文本框的字符串值：

datePicker.getEditor().getText();

因此，可以通过以下方式设置文本框的值：

datePicker.setValue(datePicker.getConverter()
    .fromString(datePicker.getEditor().getText()));

我向失焦事件添加了一个事件，这将强制更新datepicker值

和工作代码：

public DatePicker getDatePicker(DtDate defaultDate, int width){
    DatePicker dtpckr = new DatePicker();
    dtpckr.setMaxWidth(width);
    dtpckr.setMinWidth(width);
    dtpckr.setConverter(new StringConverter<LocalDate>() {
        private DateTimeFormatter dateTimeFormatter=DateTimeFormatter.ofPattern("yyyy/MM/dd");
        @Override
        public String toString(LocalDate localDate) {
            if(localDate==null)
                return "";
            return dateTimeFormatter.format(localDate);
        }
        @Override
        public LocalDate fromString(String dateString) {
            if(dateString==null || dateString.trim().isEmpty())
                return null;
            try{
                return LocalDate.parse(dateString,dateTimeFormatter);
            }
            catch(Exception e){
                //Bad date value entered
                return null;
            }
        }
    });
    dtpckr.setPromptText("yyyy/MM/dd");
    dtpckr.setValue(LocalDate.parse(defaultDate.toString(), DateTimeFormatter.ofPattern("yyyy/MM/dd")));
    //This deals with the bug located here where the datepicker value is not updated on focus lost
    //https://bugs.openjdk.java.net/browse/JDK-8092295?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
    dtpckr.focusedProperty().addListener(new ChangeListener<Boolean>() {
        @Override
        public void changed(ObservableValue<? extends Boolean> observable, Boolean oldValue, Boolean newValue) {
            if (!newValue){
                dtpckr.setValue(dtpckr.getConverter().fromString(dtpckr.getEditor().getText()));
            }
        }
    });
    return dtpckr;
}