JavaFX - 按钮编辑树视图节点文本

1 回答

• 3

  只需使用选择模型来获取所选的 TreeItem 并更改它的 value 属性 .

  示例

  @Override
  public void start(Stage primaryStage) throws IOException {
      TreeView<String> treeView = new TreeView<>();
  
      // create data
      TreeItem<String> root = new TreeItem<>("root");
  
      TreeItem<String> child1 = new TreeItem<>("child1");
      TreeItem<String> child2 = new TreeItem<>("child2");
      root.getChildren().addAll(child1, child2);
  
      child1.getChildren().addAll(
              new TreeItem<>("child1-1"),
              new TreeItem<>("child1-2"));
  
      child2.getChildren().addAll(
              new TreeItem<>("child2-1"),
              new TreeItem<>("child2-2"));
  
      treeView.setRoot(root);
  
      Button button = new Button("Change");
      button.disableProperty().bind(treeView.getSelectionModel().selectedItemProperty().isNull());
      TextField textField = new TextField();
  
      button.setOnAction(evt -> {
          // set text of selected item to TextField text
          TreeItem<String> item = treeView.getSelectionModel().getSelectedItem();
          String text = textField.getText();
          item.setValue(text);
      });
  
      Scene scene = new Scene(new VBox(treeView, textField, button));
  
      primaryStage.setScene(scene);
      primaryStage.show();
  }
  

  回复于 2024-04-29T12:03:44+08:00