问题
i hava a big problem in JavaFX. I created a TableView an i added some CheckBoxes to the TableView. I want to trigger an event if someone check the Checkbox in the TableView. I tried some different ways but I always have the same problem. I start the program and the "CheckBox trigger event" runs five times before showing the GUI. After that I can click on the Checkboxes but nothing happened. This is my code and I hope u can help me. Thx!
Controller.class
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);
}
}
TrafficVolume.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;
}
}
Console Output
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
回答1:
Add listeners to the item's checkedProperty()s:
@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);
}
}
// ...
}
来源：https://stackoverflow.com/questions/43274939/javafx-how-do-i-trigger-an-event-if-someone-check-a-checkbox-in-tableview