如何将 CheckBox 添加到 JavaFX 中的 TableView 中

checkbox java javafx-2 tableview tablecell

2022-09-01 04:46:07

在我的Java桌面应用程序中，我有一个TableView，我希望在其中有一个带有CheckBox的列。

我确实找到了 http://www.jonathangiles.net/javafx/2.0/CellFactories/ 完成此操作的地方，但是由于下载不可用，并且因为我不知道乔纳森贾尔斯多久会回复我的电子邮件，我想我会问...

如何将复选框放在 TableView 的单元格中？

答案 1

使用javafx.scene.control.cell.CheckBoxTableCell<S，T>工作就完成了！

  ObservableList< TableColumn< RSSReader, ? >> columns =
     _rssStreamsView.getColumns();
  [...]
  TableColumn< RSSReader, Boolean > loadedColumn = new TableColumn<>( "Loaded" );
  loadedColumn.setCellValueFactory(
    new Callback<CellDataFeatures<RSSReader,Boolean>,ObservableValue<Boolean>>(){
        @Override public
        ObservableValue<Boolean> call( CellDataFeatures<RSSReader,Boolean> p ){
           return p.getValue().getCompleted(); }});
  loadedColumn.setCellFactory(
     new Callback<TableColumn<RSSReader,Boolean>,TableCell<RSSReader,Boolean>>(){
        @Override public
        TableCell<RSSReader,Boolean> call( TableColumn<RSSReader,Boolean> p ){
           return new CheckBoxTableCell<>(); }});
  [...]
  columns.add( loadedColumn );

更新：使用 Java 8 lambda 表达式的相同代码

  ObservableList< TableColumn< RSSReader, ? >> columns =
     _rssStreamsView.getColumns();
  [...]
  TableColumn< RSSReader, Boolean > loadedColumn = new TableColumn<>( "Loaded" );
  loadedColumn.setCellValueFactory( f -> f.getValue().getCompleted());
  loadedColumn.setCellFactory( tc -> new CheckBoxTableCell<>());
  [...]
  columns.add( loadedColumn );

行数除以两！（16 ==> 8）

更新：相同的代码使用Java 10“var”上下文词

  var columns = _rssStreamsView.getColumns();
  [...]
  var loadedColumn = new TableColumn<RSSReader, Boolean>( "Loaded" );
  loadedColumn.setCellValueFactory( f -> f.getValue().getCompleted());
  loadedColumn.setCellFactory( tc -> new CheckBoxTableCell<>());
  [...]
  columns.add( loadedColumn );

EDIT 以添加全功能可编辑示例（Java 8）

public class Os {

   private final StringProperty  name   = new SimpleStringProperty();
   private final BooleanProperty delete = new SimpleBooleanProperty();

   public Os( String nm, boolean del ) {
      name  .set( nm  );
      delete.set( del );
   }

   public StringProperty  nameProperty  () { return name;   }
   public BooleanProperty deleteProperty() { return delete; }
}

public class FxEditableCheckBox extends Application {

   @Override
   public void start( Stage stage ) throws Exception {
      final TableView<Os> view = new TableView<>();
      final ObservableList<TableColumn<Os, ?>> columns = view.getColumns();

      final TableColumn<Os, Boolean> nameColumn = new TableColumn<>( "Name" );
      nameColumn.setCellValueFactory( new PropertyValueFactory<>( "name" ));
      columns.add(  nameColumn );

      final TableColumn<Os, Boolean> loadedColumn = new TableColumn<>( "Delete" );
      loadedColumn.setCellValueFactory( new PropertyValueFactory<>( "delete" ));
      loadedColumn.setCellFactory( tc -> new CheckBoxTableCell<>());
      columns.add( loadedColumn );

      final ObservableList<Os> items =
         FXCollections.observableArrayList(
            new Os( "Microsoft Windows 3.1"    , true  ),
            new Os( "Microsoft Windows 3.11"   , true  ),
            new Os( "Microsoft Windows 95"     , true  ),
            new Os( "Microsoft Windows NT 3.51", true  ),
            new Os( "Microsoft Windows NT 4"   , true  ),
            new Os( "Microsoft Windows 2000"   , true  ),
            new Os( "Microsoft Windows Vista"  , true  ),
            new Os( "Microsoft Windows Seven"  , false ),
            new Os( "Linux all versions :-)"   , false ));
      view.setItems( items );
      view.setEditable( true );

      final Button delBtn = new Button( "Delete" );
      delBtn.setMaxWidth( Double.MAX_VALUE );
      delBtn.setOnAction( e -> {
         final Set<Os> del = new HashSet<>();
         for( final Os os : view.getItems()) {
            if( os.deleteProperty().get()) {
               del.add( os );
            }
         }
         view.getItems().removeAll( del );
      });
      stage.setScene( new Scene( new BorderPane( view, null, null, delBtn, null )));
      BorderPane.setAlignment( delBtn, Pos.CENTER );
      stage.show();
   }

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

EDIT 以添加全功能可编辑示例（Java 10）

public class Os {

   private final StringProperty  name   = new SimpleStringProperty();
   private final BooleanProperty delete = new SimpleBooleanProperty();

   public Os( String nm, boolean del ) {
      name  .set( nm  );
      delete.set( del );
   }

   public StringProperty  nameProperty  () { return name;   }
   public BooleanProperty deleteProperty() { return delete; }
}

public class FxEditableCheckBoxJava10 extends Application {

   @Override
   public void start( Stage stage ) throws Exception {
      final var view       = new TableView<Os>();
      final var columns    = view.getColumns();
      final var nameColumn = new TableColumn<Os, Boolean>( "Name" );
      nameColumn.setCellValueFactory( new PropertyValueFactory<>( "name" ));
      columns.add(  nameColumn );
      final var loadedColumn = new TableColumn<Os, Boolean>( "Delete" );
      loadedColumn.setCellValueFactory( new PropertyValueFactory<>( "delete" ));
      loadedColumn.setCellFactory( tc -> new CheckBoxTableCell<>());
      columns.add( loadedColumn );
      final var items = FXCollections.observableArrayList(
         new Os( "Microsoft Windows 3.1"    , true  ),
         new Os( "Microsoft Windows 3.11"   , true  ),
         new Os( "Microsoft Windows 95"     , true  ),
         new Os( "Microsoft Windows NT 3.51", true  ),
         new Os( "Microsoft Windows NT 4"   , true  ),
         new Os( "Microsoft Windows 2000"   , true  ),
         new Os( "Microsoft Windows Vista"  , true  ),
         new Os( "Microsoft Windows Seven"  , false ),
         new Os( "Linux all versions :-)"   , false ));
      view.setItems( items );
      view.setEditable( true );
      final var delBtn = new Button( "Delete" );
      delBtn.setMaxWidth( Double.MAX_VALUE );
      delBtn.setOnAction( e -> {
         final var del = new HashSet<Os>();
         for( final var os : view.getItems()) {
            if( os.deleteProperty().get()) {
               del.add( os );
            }
         }
         view.getItems().removeAll( del );
      });
      stage.setScene( new Scene( new BorderPane( view, null, null, delBtn, null )));
      BorderPane.setAlignment( delBtn, Pos.CENTER );
      stage.show();
   }

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

答案 2

您需要在 TableColumn 上设置一个 CellFactory。

例如：

Callback<TableColumn<TableData, Boolean>, TableCell<TableData, Boolean>> booleanCellFactory = 
            new Callback<TableColumn<TableData, Boolean>, TableCell<TableData, Boolean>>() {
            @Override
                public TableCell<TableData, Boolean> call(TableColumn<TableData, Boolean> p) {
                    return new BooleanCell();
            }
        };
        active.setCellValueFactory(new PropertyValueFactory<TableData,Boolean>("active"));
        active.setCellFactory(booleanCellFactory);

class BooleanCell extends TableCell<TableData, Boolean> {
        private CheckBox checkBox;
        public BooleanCell() {
            checkBox = new CheckBox();
            checkBox.setDisable(true);
            checkBox.selectedProperty().addListener(new ChangeListener<Boolean> () {
                public void changed(ObservableValue<? extends Boolean> observable, Boolean oldValue, Boolean newValue) {
                    if(isEditing())
                        commitEdit(newValue == null ? false : newValue);
                }
            });
            this.setGraphic(checkBox);
            this.setContentDisplay(ContentDisplay.GRAPHIC_ONLY);
            this.setEditable(true);
        }
        @Override
        public void startEdit() {
            super.startEdit();
            if (isEmpty()) {
                return;
            }
            checkBox.setDisable(false);
            checkBox.requestFocus();
        }
        @Override
        public void cancelEdit() {
            super.cancelEdit();
            checkBox.setDisable(true);
        }
        public void commitEdit(Boolean value) {
            super.commitEdit(value);
            checkBox.setDisable(true);
        }
        @Override
        public void updateItem(Boolean item, boolean empty) {
            super.updateItem(item, empty);
            if (!isEmpty()) {
                checkBox.setSelected(item);
            }
        }
    }