如何在JavaFX中从TabPane添加/删除选项卡？

如何在JavaFX中从TabPane添加/删除选项卡

我试图在JavaFX中的一个窗格中使用TabPane来添加和删除TabPane中的选项卡。我使用的是基于FXML的布局，如下所示：

<?xml version="1.0" encoding="UTF-8"?>

<?import javafx.scene.control.*?>
<?import java.lang.*?>
<?import javafx.scene.layout.*?>
<?import javafx.scene.layout.VBox?>


<Pane id="pane" maxHeight="-Infinity" maxWidth="-Infinity" minHeight="-Infinity" minWidth="-Infinity" prefHeight="400.0" prefWidth="600.0" xmlns="http://javafx.com/javafx/8" xmlns:fx="http://javafx.com/fxml/1" fx:controller="controller.Controller">
 <children>
  <TabPane id="tabPane" prefHeight="328.0" prefWidth="600.0" tabClosingPolicy="ALL_TABS">
    <tabs>
      <Tab text="Tab1">
        <content>
          <AnchorPane minHeight="0.0" minWidth="0.0" prefHeight="320.0" prefWidth="600.0" />
        </content>
      </Tab>
      <Tab text="Tab2">
        <content>
          <AnchorPane minHeight="0.0" minWidth="0.0" prefHeight="180.0" prefWidth="200.0" />
        </content>
      </Tab>
    </tabs>
  </TabPane>
  <Button id="tabButton" layoutX="274.0" layoutY="361.0" mnemonicParsing="false" onAction="#handleTabButton" text="Button" />
</children>
</Pane>

package src;

import controller.Controller;
import javafx.application.Application;
import javafx.fxml.FXMLLoader;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.stage.Stage;

public class MainApp extends Application{

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

@Override
public void start(Stage primaryStage) throws Exception {
    FXMLLoader loader = new FXMLLoader(getClass().getResource("LMainApp.fxml"));
    Parent root = loader.load();

    Controller controller = loader.getController();
    controller.setStage(primaryStage);

    primaryStage.setTitle("TestTabs");

    primaryStage.setScene(new Scene(root));
    primaryStage.show();
}

}

package controller;

import java.net.URL;
import java.util.ResourceBundle;

import javafx.event.ActionEvent;
import javafx.fxml.FXML;
import javafx.fxml.Initializable;
import javafx.scene.control.SingleSelectionModel;
import javafx.scene.control.Tab;
import javafx.scene.control.TabPane;
import javafx.stage.Stage;

public class Controller implements Initializable{

Stage stage;

@FXML
private TabPane tabPane;

private Tab tab = new Tab();
private SingleSelectionModel<Tab> selectionModel;

@Override
public void initialize(URL location, ResourceBundle resources) {
    selectionModel = tabPane.getSelectionModel();
}

public void setStage(Stage stage){
    this.stage = stage;
}

@FXML
private void handleTabButton(ActionEvent event){
    tab.setText("New Tab");
    tab.setId("newTab");
    tab.setClosable(true);
    tabPane.getTabs().add(tab);
    selectionModel.selectLast();
}

}

我的控制器如下所示：

<?xml version="1.0" encoding="UTF-8"?>

<?import javafx.scene.control.*?>
<?import java.lang.*?>
<?import javafx.scene.layout.*?>
<?import javafx.scene.layout.VBox?>


<Pane id="pane" maxHeight="-Infinity" maxWidth="-Infinity" minHeight="-Infinity" minWidth="-Infinity" prefHeight="400.0" prefWidth="600.0" xmlns="http://javafx.com/javafx/8" xmlns:fx="http://javafx.com/fxml/1" fx:controller="controller.Controller">
 <children>
  <TabPane id="tabPane" prefHeight="328.0" prefWidth="600.0" tabClosingPolicy="ALL_TABS">
    <tabs>
      <Tab text="Tab1">
        <content>
          <AnchorPane minHeight="0.0" minWidth="0.0" prefHeight="320.0" prefWidth="600.0" />
        </content>
      </Tab>
      <Tab text="Tab2">
        <content>
          <AnchorPane minHeight="0.0" minWidth="0.0" prefHeight="180.0" prefWidth="200.0" />
        </content>
      </Tab>
    </tabs>
  </TabPane>
  <Button id="tabButton" layoutX="274.0" layoutY="361.0" mnemonicParsing="false" onAction="#handleTabButton" text="Button" />
</children>
</Pane>

package src;

import controller.Controller;
import javafx.application.Application;
import javafx.fxml.FXMLLoader;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.stage.Stage;

public class MainApp extends Application{

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

@Override
public void start(Stage primaryStage) throws Exception {
    FXMLLoader loader = new FXMLLoader(getClass().getResource("LMainApp.fxml"));
    Parent root = loader.load();

    Controller controller = loader.getController();
    controller.setStage(primaryStage);

    primaryStage.setTitle("TestTabs");

    primaryStage.setScene(new Scene(root));
    primaryStage.show();
}

}

package controller;

import java.net.URL;
import java.util.ResourceBundle;

import javafx.event.ActionEvent;
import javafx.fxml.FXML;
import javafx.fxml.Initializable;
import javafx.scene.control.SingleSelectionModel;
import javafx.scene.control.Tab;
import javafx.scene.control.TabPane;
import javafx.stage.Stage;

public class Controller implements Initializable{

Stage stage;

@FXML
private TabPane tabPane;

private Tab tab = new Tab();
private SingleSelectionModel<Tab> selectionModel;

@Override
public void initialize(URL location, ResourceBundle resources) {
    selectionModel = tabPane.getSelectionModel();
}

public void setStage(Stage stage){
    this.stage = stage;
}

@FXML
private void handleTabButton(ActionEvent event){
    tab.setText("New Tab");
    tab.setId("newTab");
    tab.setClosable(true);
    tabPane.getTabs().add(tab);
    selectionModel.selectLast();
}

}

有谁能建议如何解决这个问题吗？此外，如果有人能帮助我-如何访问/使用FXML文件中的元素。

---

提前感谢。

您在fxml中使用的是

id

而不是

fx:id

。将

选项卡窗格的声明更改为

<TabPane fx:id="tabPane" prefHeight="328.0" prefWidth="600.0" tabClosingPolicy="ALL_TABS">



有关更多信息：




您在fxml中使用的是
id
而不是
fx:id
。将
选项卡窗格的声明更改为

<TabPane fx:id="tabPane" prefHeight="328.0" prefWidth="600.0" tabClosingPolicy="ALL_TABS">



有关更多信息：




能否在问题中添加异常的stacktrace？Hi@ItachiUchiha，我已添加stacktrace。能否在问题中添加异常的stacktrace？Hi@ItachiUchiha，我已添加stacktrace。