Question

有点奇怪，我正在使用JavaFX 8，并且在我的Jubula测试过程中遇到了一些奇怪的行为。

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;
}

工作正常，控件在表单上创建并按预期工作。如果我使用日历来选择日期，则会更新该值。

现在，对于奇数部分，如果我输入日期选择器并手动输入日期（例如2017/10/11），然后通过选项卡或单击表单上的下一个文本框退出控件，日期选择器localdate值未更新。更新日期的唯一方法是按Enter键强制datepicker实现新值。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);
    }
}

其中包含以下内容：

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期间按Enter键，则会在用户将数据输入其他控件之前触发onaction事件，并且我不特别注意想要那个。

所以问题是，如果用户在框中输入文本然后离开框而不按Enter，为什么dtpckr.getValue()不会改变？我找不到一个事件来调用用户离开datepicker框或datepicker的属性来获取控件的文本值，并将其与dtpckr.getValue()的值进行比较。我有什么东西在这里缺席吗？

如果您需要更多信息，请与我们联系！

的 [编辑]

It appears this might be a bug in the current datepicker setup in JavaFX

我可能必须删除默认按钮并在Jubula测试中输入回车按钮才能使其正常工作。除非有人有其他选择吗？

Answer 1

我上面添加的错误日志有答案。您可以通过以下代码访问文本框的字符串值：

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

所以它是保存当前文本框详细信息的datepicker.getEditor().getText()。我正在向丢失的焦点事件添加一个事件，这将强制更新datepicker值

[编辑]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;
}

Answer 2

我遇到了同样的问题。这个技巧解决了它：

Date date = DateConverter.toDate(datePicker.getEditor().getText());

其中DateConverter.toDate()是将字符串转换为日期的方法。

Answer 3

@Draken的答案需要一点额外的东西。如果用户键入无效的日期，则代码将引发DateTimeParseException。您可以这样模拟DatePicker的行为：

dtpckr.getEditor().focusedProperty().addListener((obj, wasFocused, isFocused)->{
      if (!isFocused) {
         try {
             dtpckr.setValue(dtpckr.getConverter().fromString(dtpckr.getEditor().getText()));
         } catch (DateTimeParseException e) {
                dtpckr.getEditor().setText(dtpckr.getConverter().toString(dtpckr.getValue()));
         }
      }
});

JavaFX datepicker没有更新值

的 [编辑]

3 个答案: