如何使ListView可选但不可编辑

3 回答

• 0

  所以在打破了我的脑袋，大量的研究和API阅读之后，我想出了一个解决方案 . 这完全是我想要做的 . 这是演示，如果有人需要它;）所以我的想法是，每当我们想要选择行的内容时，我们需要选择行，获取textField并将编辑设置为true或false（每次） . 因此，在我制作的演示中，我放置了一个按钮，以便您可以将编辑切换为true或false，以确保它正在工作，以及如何工作 .

  干杯 .

  我评论了一些代码以便更好地理解，如果您对此有任何疑问，请告诉我 .

  package sample;
  
  import com.sun.javafx.scene.control.skin.VirtualFlow;
  import javafx.application.Application;
  import javafx.application.Platform;
  import javafx.collections.FXCollections;
  import javafx.scene.Group;
  import javafx.scene.Scene;
  import javafx.scene.control.*;
  import javafx.scene.control.cell.TextFieldListCell;
  import javafx.scene.layout.StackPane;
  import javafx.stage.Stage;
  
  import java.util.ArrayList;
  import java.util.Arrays;
  import java.util.List;
  
  
  public class Main extends Application {
  private boolean editable = false;
  
  public static  IndexedCell getCell(final Control control, final int index) {
      return getVirtualFlow(control).getCell(index);
  }
  
  public static VirtualFlow<?> getVirtualFlow(Control control) {
      Group group = new Group();
      Scene scene = new Scene(group);
      Stage stage = new Stage();
  
      if(control.getScene() == null) {
          group.getChildren().setAll(control);
          stage.setScene(scene);
          stage.show();
      }
  
      VirtualFlow<?>flow = (VirtualFlow<?>) control.lookup("#virtual-flow");
      return flow;
  }
  
  public void setEditable(ListView contactsList){
          //this needs to be done since we need to run our code after the text field was rendered
          //so we need to invoke our code after this happens, if not it will throw a null pointer...
          Platform.runLater(() -> {
              //this is one of the most important guys because javafx api says that
              //TextFieldListCell.forListView() allows editing of the cell content when the cell is double-clicked,
              // or when {@link ListView#edit(int)} is called.
              int rowIndex = contactsList.getSelectionModel().getSelectedIndex();
              contactsList.edit(rowIndex);
              ListCell rootCell = (ListCell) getCell(contactsList, rowIndex);
              TextField textField = (TextField) rootCell.getGraphic();
              textField.setEditable(editable);
          });
  }
  
  @Override
  public void start(Stage primaryStage) throws Exception{
      List<String> contacts = new ArrayList<>(Arrays.asList("968787522","3424234234","2343234324"));
      ListView<String> contactsList = new ListView();
      contactsList.setItems(FXCollections.observableArrayList(contacts));
      contactsList.setEditable(true);
  
      //this gives me the ability to edit the row as text field but I want this text field to not be editable
      contactsList.setCellFactory(TextFieldListCell.forListView());
      contactsList.setOnEditStart(e -> {
          setEditable(contactsList);
      });
  
      StackPane pane = new StackPane();
      Button editBtn = new Button("Toggle edit");
      editBtn.setOnAction(event -> {
          editable = !editable;
          editBtn.setText("Editing = " + editable);
          //to cancel any editing that might be occuring
          contactsList.getSelectionModel().clearSelection();
      });
      pane.getChildren().addAll(contactsList,editBtn);
      primaryStage.setScene(new Scene(pane, 300, 275));
      primaryStage.show();
  }
  
  public static void main(String[] args) {
      launch(args);
  }
  }
  

  回复于 2024-05-01T22:40:36+08:00
• 0

  如果我理解正确，则没有必要将列表视图设置为“不可编辑”，因为默认行为应该足以满足您的需要 . 看看这段代码，例如：

  import javafx.application.Application;
  import javafx.event.EventHandler;
  import javafx.scene.Scene;
  import javafx.scene.control.ListView;
  import javafx.scene.input.MouseEvent;
  import javafx.scene.layout.StackPane;
  import javafx.stage.Stage;
  
  public class NewFXMain extends Application {
  
      @Override
      public void start(Stage primaryStage) {
          ListView listView = new ListView();
          listView.getItems().addAll("one","two","three","four");
  
          listView.setOnMouseClicked(new EventHandler<MouseEvent>() {
              @Override
              public void handle(MouseEvent event) {
                  System.out.println(listView.getSelectionModel().getSelectedItem());
              }
          });
  
          StackPane root = new StackPane();
          root.getChildren().add(listView);
          Scene scene = new Scene(root, 300, 250);
  
          primaryStage.setTitle("ListView Example");
          primaryStage.setScene(scene);
          primaryStage.show();
      }
  
      public static void main(String[] args) {
          launch(args);
      }
  
  }
  

  我没有改变ListView的可编辑属性，但我可以选择每个项目，而无法编辑它（从更改其值的意义上说） . 您可以轻松地将EventHandler添加到ListView以执行您要执行的任何操作 . 您还可以通过操作CellFactory将ListHandler添加到ListView的每个单元格，如下面的答案所示：How to handle ListView item clicked action?

  回复于 2024-05-01T22:40:36+08:00
• 1

  这对我有用：

  TableView<DataBean> table = new TableView<>();
      table.setItems(...); // list of some DataBean objects with dataBeanField proprty
      table.setEditable(true);
  
      TableColumn<DataBean, String> column = new TableColumn<>("SomeData");
      column.setCellValueFactory(new PropertyValueFactory<DataBean, String>("dataBeanField"));
      column.setCellFactory(new Callback<TableColumn<DataBean, String>, TableCell<DataBean, String>>() {
          @Override
          public TableCell<DataBean, String> call(TableColumn<DataBean, String> param) {
              return new TextFieldTableCell<>(new DefaultStringConverter() {
                  private String defaultValue = "";
  
                  @Override
                  public String fromString(String newValue) {
                      return super.fromString(defaultValue);
                  }
  
                  @Override
                  public String toString(String value) {
                      return defaultValue = super.toString(value);
                  }
              });
          }
      });
  

  回复于 2024-05-01T22:40:36+08:00