JavaFX，如果有人选中 Tableview 中的复选框，如何触发事件

Question

我在 JavaFX 中遇到了一个大问题。我创建了一个 TableView，并向 TableView 添加了一些复选框。如果有人选中 TableView 中的复选框，我想触发一个事件。我尝试了一些不同的方法，但总是遇到同样的问题。我启动程序，“CheckBox 触发事件”在显示 GUI 之前运行五次。之后我可以单击复选框，但什么也没发生。这是我的代码，希望你能帮助我。谢谢!

Controller 类

package GUI;

import java.io.IOException;
import java.util.ArrayList;

import javafx.beans.value.ObservableValue;
import ExternalRessources.TrafficVolume;
import javafx.collections.FXCollections;
import javafx.collections.ObservableList;
import javafx.event.ActionEvent;
import javafx.fxml.FXML;
import javafx.scene.control.Button;
import javafx.scene.control.CheckBox;
import javafx.scene.control.MenuBar;
import javafx.scene.control.MenuItem;
import javafx.scene.control.TableColumn;
import javafx.scene.control.TableView;
import javafx.scene.control.cell.CheckBoxTableCell;
import javafx.scene.control.cell.PropertyValueFactory;
import javafx.scene.layout.AnchorPane;
import javafx.scene.layout.GridPane;
import javafx.stage.Stage;
import javafx.util.Callback;

public class TVIDSelectionPanelController {


    @FXML
    private Button BACKBUTTON;
    @FXML
    private Button TEST;
    @FXML
    private MenuItem MENUITEMSETTINGS;
    @FXML
    private MenuBar MENUBAR;
    @FXML
    private GridPane GRIDPANETVID;
    @FXML
    private TableView<TrafficVolume> TABLETVID;
    @FXML
    private TableColumn<TrafficVolume, String> TABLECOLTVID;
    @FXML
    private TableColumn<TrafficVolume, String> TABLECOLFLIGHTLVL;
    @FXML
    private TableColumn<TrafficVolume, CheckBox> TABLECOLCHECKBOX;
    @FXML
    private AnchorPane TABLEPANE;

    private ExchangeController exchange;
    public ObservableList<TrafficVolume> list = FXCollections.observableArrayList();

    @FXML
    private void handleBACKBUTTON(ActionEvent event) throws IOException
    {         


    }

    public void init(ExchangeController ex)
    {
        this.exchange =ex;
    }

    @FXML   
    public void initalize() throws IOException
    {
        this.ChooseData();
    }

    @FXML
    private void ChooseData()
    {
        switch(exchange.getSelectedEBG())
        {
            case "Central":
            {
                this.createTable(exchange.getCentralTVID());
            }
            case "West":
            {
                this.createTable(exchange.getWestTVID());
            }
            case "East":
            {
                this.createTable(exchange.getEastTVID());
            }
            case "North":
            {
                this.createTable(exchange.getNorthTVID());
            }
            case "South":
            {
                this.createTable(exchange.getSouthTVID());
            }
        }
    }


    private void createTable(ArrayList<ArrayList<String>> ListTVID)
    {
        for(int i=0;i<ListTVID.size();i++)
        {
            list.add(new TrafficVolume(ListTVID.get(i).get(0),ListTVID.get(i).get(1)));
        }
        TableColumn<TrafficVolume, String> TVIDs = new TableColumn<TrafficVolume, String>("TV-ID");
        TableColumn<TrafficVolume, String> FLVL = new TableColumn<TrafficVolume, String>("Flight Level");   
        TableColumn<TrafficVolume, Boolean> checkedCol = new TableColumn<TrafficVolume, Boolean>("Active");
        TABLETVID.setItems(list);
        TABLETVID.getColumns().addAll(TVIDs,FLVL,checkedCol);
        TVIDs.setCellValueFactory(new PropertyValueFactory<TrafficVolume, String>("name"));
        FLVL.setCellValueFactory(new PropertyValueFactory<TrafficVolume, String>("flightLVL"));
        checkedCol.setCellValueFactory(new PropertyValueFactory<TrafficVolume, Boolean>("check"));
        checkedCol.setCellFactory(CheckBoxTableCell.forTableColumn(checkedCol));
        checkedCol.setEditable(true);
        TABLETVID.setEditable(true);

        checkedCol.setCellFactory(CheckBoxTableCell.forTableColumn(new Callback<Integer, ObservableValue<Boolean>>()
        {
            @Override
            public ObservableValue<Boolean> call(Integer param)
            {

                return list.get(param).checkedProperty();
            }
        }));


        for (TrafficVolume trafficVolume : list) {
            trafficVolume.checkedProperty().addListener((obs, wasChecked,isNowChecked) -> {
                  System.out.println("Checked property for " + trafficVolume.getName() +
                            " changed from "+wasChecked + " to " + isNowChecked);
            });
        }

    }




    //Switch the Scene
    @FXML
    private void handleSettings(ActionEvent event) throws IOException
    {       
        exchange.setTVIDSelectionPanelScene(MENUBAR.getParent().getScene());
        exchange.setTVIDSelectionPanelStage((Stage) MENUBAR.getParent().getScene().getWindow());
        exchange.setLastScene(exchange.getTVIDSelectionPanelScene());
        exchange.setLastStage(exchange.getTVIDSelectionPanelStage());
        exchange.initalizeStageOptions(event, MENUBAR);  

    }


}

交通量.class

    package ExternalRessources;

import javafx.beans.property.BooleanProperty;
import javafx.beans.property.SimpleBooleanProperty;
import javafx.beans.property.SimpleStringProperty;
import javafx.beans.value.ObservableBooleanValue;

public class TrafficVolume {
    private  SimpleStringProperty name;
    private  SimpleStringProperty flightLVL;
    private  BooleanProperty check;

    public TrafficVolume(String name, String flightLVL) 
    {
        this.name = new SimpleStringProperty(name);
        this.flightLVL = new SimpleStringProperty(flightLVL);
        this.check = new SimpleBooleanProperty(false);
    }

    public String getName() {
        return name.get();
    }

    public String getFlightLVL() {
        return flightLVL.get();
    }

    public Boolean getCheck() {
        return check.get();
    }

    public BooleanProperty checkedProperty()
    {
        System.out.println("test");
        return check;
    }

    public void setCheck(Boolean checked)
    {
        this.check.set(checked);
    }

    public ObservableBooleanValue isChecked()
    {
        System.out.println("test");
        return check;
    }

}

控制台输出

Checked property for EDUCNTR changed from false to true
Checked property for EDUCNTR changed from false to true
Checked property for EDUCNTR changed from false to true
Checked property for EDUCNTR changed from false to true
Checked property for EDUCNTR changed from false to true
Checked property for EDUFFM1F changed from false to true
Checked property for EDUFFM1F changed from false to true
Checked property for EDUFFM1F changed from false to true
Checked property for EDUFFM1F changed from false to true
Checked property for EDUFFM1F changed from false to true
Checked property for EDUFFM14 changed from false to true
Checked property for EDUFFM14 changed from false to true
Checked property for EDUFFM14 changed from false to true
Checked property for EDUFFM14 changed from false to true
Checked property for EDUFFM14 changed from false to true
Checked property for EDUFFM24 changed from false to true
Checked property for EDUFFM24 changed from false to true
Checked property for EDUFFM24 changed from false to true
Checked property for EDUFFM24 changed from false to true
Checked property for EDUFFM24 changed from false to true
Checked property for EDUFFM34 changed from false to true
Checked property for EDUFFM34 changed from false to true
Checked property for EDUFFM34 changed from false to true
Checked property for EDUFFM34 changed from false to true
Checked property for EDUFFM34 changed from false to true

Answer 1

将监听器添加到项目的 checkedProperty() 中:

@FXML   
public void initalize() throws IOException
    {

    TableColumn<TrafficVolume, String> TVIDs = new TableColumn<TrafficVolume, String>("TV-ID");
    TableColumn<TrafficVolume, String> FLVL = new TableColumn<TrafficVolume, String>("Flight Level");   
    TableColumn<TrafficVolume, Boolean> checkedCol = new TableColumn<TrafficVolume, Boolean>("Active");
    TABLETVID.setItems(list);

    for (TrafficVolume trafficVolume : list) {
        trafficVolume.checkedProperty().addListener((obs, wasChecked, isNowChecked) -> {
            System.out.println("Checked property for " + trafficVolume.getName() +
                " changed from "+wasChecked + " to " + isNowChecked);
        }
    }

    // ...
}