我正在尝试编写一个程序，您可以在其中浏览选项卡，然后在选项卡中具有多个TitledPane，其中具有一些功能。 对于其中一些，有一些字段要填写。我希望询问用户是否要在更改TitledPane或Tabs时保存在字段中写的内容。
这就是为什么我想在我创建的手风琴的方法“ getExpandedPane”上添加侦听器的原因。这样我就知道哪个TitledPane当前处于活动状态。
也许您知道该怎么做，或者是另一种解决方案...
预先感谢
<?xml version="1.0" encoding="UTF-8"?>
<?import javafx.geometry.Insets?>
<?import javafx.scene.control.Accordion?>
<?import javafx.scene.control.Button?>
<?import javafx.scene.control.Label?>
<?import javafx.scene.control.Tab?>
<?import javafx.scene.control.TabPane?>
<?import javafx.scene.control.TextField?>
<?import javafx.scene.control.TitledPane?>
<?import javafx.scene.image.Image?>
<?import javafx.scene.image.ImageView?>
<?import javafx.scene.layout.AnchorPane?>
<?import javafx.scene.layout.BorderPane?>
<?import javafx.scene.layout.ColumnConstraints?>
<?import javafx.scene.layout.GridPane?>
<?import javafx.scene.layout.HBox?>
<?import javafx.scene.layout.RowConstraints?>
<?import javafx.scene.layout.VBox?>
<?import javafx.scene.text.Font?>
<?import javafx.scene.text.Text?>
<BorderPane maxHeight="1.7976931348623157E308" maxWidth="1.7976931348623157E308" minHeight="-Infinity" minWidth="-Infinity" prefHeight="500.0" prefWidth="800.0" xmlns="http://javafx.com/javafx/10.0.1" xmlns:fx="http://javafx.com/fxml/1" fx:controller="javafxclinic.MainViewController">
<center>
<TabPane fx:id="tabPaneFunctions" maxHeight="1.7976931348623157E308" maxWidth="1.7976931348623157E308" minHeight="-Infinity" minWidth="-Infinity" prefHeight="374.0" prefWidth="800.0" tabClosingPolicy="UNAVAILABLE" tabMaxHeight="150.0" tabMinHeight="10.0" tabMinWidth="150.0" BorderPane.alignment="CENTER">
<tabs>
<Tab fx:id="appointmen" text="Appointments">
<content>
<Accordion fx:id="appointmentsAccordion" maxWidth="1.7976931348623157E308" minHeight="-Infinity" prefHeight="78.0" prefWidth="800.0">
<panes>
<TitledPane fx:id="addAppointment" animated="false" maxWidth="1.7976931348623157E308" text="Add an appointment">
<content>
<AnchorPane minHeight="0.0" minWidth="0.0" prefHeight="180.0" prefWidth="200.0" />
</content>
</TitledPane>
<TitledPane fx:id="deletePatient" animated="false" maxWidth="1.7976931348623157E308" text="Delete patient">
<content>
<AnchorPane minHeight="0.0" minWidth="0.0" prefHeight="180.0" prefWidth="200.0" />
</content>
</TitledPane>
<TitledPane fx:id="searchPatient" animated="false" maxWidth="1.7976931348623157E308" text="Search for patient informations">
<content>
<AnchorPane minHeight="0.0" minWidth="0.0" prefHeight="180.0" prefWidth="200.0" />
</content>
</TitledPane>
</panes>
</Accordion>
</content>
<graphic>
<ImageView fitHeight="50.0" fitWidth="50.0" pickOnBounds="true" preserveRatio="true">
<image>
<Image url="@../img/appointment.png" />
</image>
</ImageView>
</graphic>
</Tab>
<Tab text="Doctors">
<content>
<Accordion fx:id="doctorsAccordion" maxWidth="1.7976931348623157E308" prefHeight="78.0" prefWidth="800.0">
<panes>
<TitledPane fx:id="listDoctors" animated="false" text="Show the list of doctors">
<content>
<AnchorPane minHeight="0.0" minWidth="0.0" prefHeight="180.0" prefWidth="200.0" />
</content>
</TitledPane>
<TitledPane fx:id="addDoctor" animated="false" text="Add a doctor">
<content>
<AnchorPane minHeight="0.0" minWidth="0.0" prefHeight="180.0" prefWidth="200.0" />
</content>
</TitledPane>
<TitledPane fx:id="deleteDoctor" animated="false" text="Delete a doctor">
<content>
<AnchorPane minHeight="0.0" minWidth="0.0" prefHeight="180.0" prefWidth="200.0" />
</content>
</TitledPane>
</panes>
</Accordion>
</content>
<graphic>
<ImageView fitHeight="50.0" fitWidth="50.0" pickOnBounds="true" preserveRatio="true">
<image>
<Image url="@../img/doctor.png" />
</image>
</ImageView>
</graphic>
</Tab>
<Tab text="Patients">
<content>
<Accordion fx:id="patientsAccordion" maxWidth="1.7976931348623157E308" prefHeight="78.0" prefWidth="800.0">
<panes>
<TitledPane fx:id="addPatient" animated="false" text="Add a patient">
<content>
<GridPane>
<columnConstraints>
<ColumnConstraints hgrow="SOMETIMES" minWidth="10.0" prefWidth="100.0" />
<ColumnConstraints hgrow="SOMETIMES" minWidth="10.0" prefWidth="100.0" />
<ColumnConstraints hgrow="SOMETIMES" minWidth="10.0" prefWidth="100.0" />
<ColumnConstraints hgrow="SOMETIMES" minWidth="10.0" prefWidth="100.0" />
<ColumnConstraints hgrow="SOMETIMES" minWidth="10.0" prefWidth="100.0" />
</columnConstraints>
<rowConstraints>
<RowConstraints minHeight="10.0" prefHeight="30.0" vgrow="SOMETIMES" />
<RowConstraints minHeight="10.0" prefHeight="30.0" vgrow="SOMETIMES" />
<RowConstraints minHeight="10.0" prefHeight="30.0" vgrow="SOMETIMES" />
<RowConstraints minHeight="10.0" prefHeight="30.0" vgrow="SOMETIMES" />
<RowConstraints minHeight="10.0" prefHeight="30.0" vgrow="SOMETIMES" />
<RowConstraints minHeight="10.0" prefHeight="30.0" vgrow="SOMETIMES" />
<RowConstraints minHeight="10.0" prefHeight="30.0" vgrow="SOMETIMES" />
</rowConstraints>
<children>
<TextField GridPane.columnIndex="1" GridPane.rowIndex="1" />
<Label text="Identification number" GridPane.rowIndex="1" />
<Label text="First name" GridPane.rowIndex="2" />
<Label text="Surname" GridPane.rowIndex="3" />
<Label text="Phone Number" GridPane.rowIndex="4" />
<TextField GridPane.columnIndex="1" GridPane.rowIndex="2" />
<TextField GridPane.columnIndex="1" GridPane.rowIndex="3" />
<TextField GridPane.columnIndex="1" GridPane.rowIndex="4" />
<VBox prefHeight="200.0" prefWidth="100.0" GridPane.columnIndex="3" GridPane.halignment="CENTER" GridPane.rowIndex="2" GridPane.rowSpan="2" GridPane.valignment="CENTER">
<children>
<ImageView fitHeight="117.0" fitWidth="112.0" pickOnBounds="true" preserveRatio="true">
<image>
<Image url="@../img/addportrait_patient.png" />
</image>
</ImageView>
<Label alignment="CENTER" contentDisplay="CENTER" prefHeight="18.0" prefWidth="113.0" text="Photo" textAlignment="CENTER" />
</children>
</VBox>
<HBox prefHeight="100.0" prefWidth="200.0" GridPane.columnIndex="2" GridPane.halignment="CENTER" GridPane.rowIndex="6" GridPane.valignment="CENTER">
<children>
<Button alignment="CENTER" contentDisplay="CENTER" mnemonicParsing="false" prefHeight="26.0" prefWidth="59.0" text="Clean">
<HBox.margin>
<Insets />
</HBox.margin>
</Button>
<Button alignment="CENTER" contentDisplay="CENTER" defaultButton="true" mnemonicParsing="false" prefHeight="26.0" prefWidth="60.0" text="Save">
<HBox.margin>
<Insets left="20.0" />
</HBox.margin>
</Button>
</children>
</HBox>
</children>
<padding>
<Insets bottom="10.0" left="10.0" right="10.0" top="10.0" />
</padding>
</GridPane>
</content>
</TitledPane>
<TitledPane fx:id="deletePatient" animated="false" text="Delete patient">
<content>
<AnchorPane minHeight="0.0" minWidth="0.0" prefHeight="180.0" prefWidth="200.0" />
</content>
</TitledPane>
<TitledPane fx:id="searchPatient" animated="false" text="Search for patient informations">
<content>
<AnchorPane minHeight="0.0" minWidth="0.0" prefHeight="180.0" prefWidth="200.0" />
</content>
</TitledPane>
</panes>
</Accordion>
</content>
<graphic>
<ImageView fitHeight="50.0" fitWidth="50.0" pickOnBounds="true" preserveRatio="true">
<image>
<Image url="@../img/patient.png" />
</image>
</ImageView>
</graphic>
</Tab>
</tabs>
</TabPane>
</center>
<top>
<Text fx:id="clinicName" fill="#008dff" strokeType="OUTSIDE" strokeWidth="0.0" textAlignment="CENTER" BorderPane.alignment="CENTER">
<font>
<Font name="Arial" size="20.0" />
</font>
</Text>
</top>
</BorderPane>