检测Tableview中多列标题的选择

Question

我正在尝试检测tableview中多个列标题的选择。

但是，当选择tableview的列标题时，附加到tableview中所选单元格的侦听器内的代码永远不会被调用。

下面的代码选择显示了一个完整的小示例应用程序的源代码。它包含两个ListChangeListeners。第一个侦听器附加到包含表数据的ObservableList。每次点击标题时都会调用它。第二个侦听器附加到表的选定单元格。但是，当选择tableview列标题时，永远不会调用此侦听器。

    package TableViewHeaderListener;

    import java.util.ArrayList;
    import java.util.Arrays;
    import java.util.List;

    import javafx.application.Application;
    import javafx.beans.property.SimpleStringProperty;
    import javafx.beans.value.ObservableValue;
    import javafx.collections.FXCollections;
    import javafx.collections.ListChangeListener;
    import javafx.collections.ObservableList;

    import javafx.scene.Scene;

    import javafx.scene.control.TableColumn;
    import javafx.scene.control.TablePosition;
    import javafx.scene.control.TableView;
    import javafx.scene.control.TableColumn.CellDataFeatures;
    import javafx.scene.layout.Pane;
    import javafx.stage.Stage;
    import javafx.util.Callback;

    public class TableViewExample extends Application {

      final TableView<String[]> table = new TableView<String[]>();
      ObservableList<String []> data = FXCollections.observableArrayList();

      @Override
      public void start(Stage stage) {

        Pane pane = new Pane();

        String[][] dat = new String[][]{    {"C1","C2","C3"},
                {"1","1","0"},
                {"0","0","1"},
                {"1","1","1"}};


        data.addAll(Arrays.asList(dat));
        data.remove(0); 


        for (int i = 0; i <  dat[0].length; i++) {
             TableColumn tc = new  TableColumn(dat[0][i]);
             final int colNo = i;

            //Adds data to table and calls updateItem, which also colors heatmap 
            tc.setCellValueFactory(new Callback<CellDataFeatures<String[], String>, ObservableValue<String>>() {
                public ObservableValue<String> call(CellDataFeatures<String[], String> p) {
                     return new SimpleStringProperty((p.getValue()[colNo]));
                 }  
             });

             table.getColumns().add(tc); 
          }


        table.setItems(data); 
        table.setVisible(false);
        table.setVisible(true);

        pane.getChildren().add(table);


        data.addListener(new ListChangeListener<String []>() {
          @Override
          public void onChanged(Change change) {
              System.out.println("data: ListChangeListener");
              //This prints when a column header is clicked
          }     
        });

        table.getSelectionModel().setCellSelectionEnabled(true);
        ObservableList<TablePosition> selectedCells = table.getSelectionModel().getSelectedCells();
        selectedCells.addListener(new ListChangeListener<TablePosition>() {
            @Override
            public void onChanged(Change change) {
            List<Integer> selectedRowIndices = new ArrayList<Integer>();
                    List<Integer> selectedColumnIndices = new ArrayList<Integer>();
                    try{ 
                selectedRowIndices.clear();
                selectedColumnIndices.clear();

                   for (TablePosition pos : selectedCells) {
                    selectedRowIndices.add(pos.getRow());
                    selectedColumnIndices.add(pos.getColumn());
                   }
            }catch(Exception e){
                System.err.println(e.getMessage()+e.getCause());
            }
            System.out.println("ListChangeListener<TablePosition>: selectedRows: "+selectedRowIndices+"selectedColumns "+selectedColumnIndices);
            //This never prints even when a column header is selected or deselected
          }
       });

        stage.setScene(new Scene(pane));
        stage.show();
      }

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