问题
Hi I am trying in the spirit of the example in http://code.makery.ch/java/javafx-2-tutorial-intro/ to make a similar application where the TableView values can be edited by a series of TextFields instead of a popup form. The reason why I would wannt do it like that is that I am having many fields in a similar application I want to develop and I would like to avoid the user editing them on the TableView
The TableView shows a list of Persons where for each I record name, surname and country. I have tried to create a bidirectionalBinding between the name property of the Person bean and the textProperty() of the TextField but this doesn't work.
I also tried to add to the textProperty a ChangeListener so when it changes to update the ObservableList of propoerties and this also didn't work
Apparently I am doing something wrong and so far I have the following code:
FXDocumentController.java
public class FXMLDocumentController implements Initializable {
private static final Logger logger = Logger.getLogger(FXMLDocumentController.class.getName());
private ObservableList<Person> data;
@FXML
private TableView<Person> tableview;
@FXML
private TableColumn<Person, String> colName;
@FXML
private TableColumn<Person, String> colSurname;
@FXML
private TableColumn<Person, String> colCountry;
@FXML
private TextField name;
@Override
public void initialize(URL url, ResourceBundle rb) {
assert tableview != null : "fx:id=\"tableview\" was not injected: check your FXML file 'UserMaster.fxml'.";
colName.setCellValueFactory(
new PropertyValueFactory<Person,String>("name"));
colSurname.setCellValueFactory(
new PropertyValueFactory<Person,String>("surname"));
colCountry.setCellValueFactory(
new PropertyValueFactory<Person,String>("country"));
DBClass objDbClass = new DBClass();
try{
con = objDbClass.getConnection();
buildData();
tableview.setOnMouseClicked(new EventHandler<MouseEvent>() {
@Override
public void handle(MouseEvent mouseEvent) {
if (mouseEvent.getButton().equals(MouseButton.PRIMARY)) {
if (mouseEvent.getClickCount() == 1) {
Person p = tableview.getSelectionModel().getSelectedItem();
//name.textProperty().setValue(p.getName());
name.textProperty().bindBidirectional(p.name);
//name.textProperty().bind(p.name);
}
}
}
});
name.textProperty().addListener(new ChangeListener(){
@Override
public void changed(ObservableValue ov, Object t, Object t1) {
System.out.println("Value changed!");
/** Tried also this but this wont work
name.textProperty().setValue((String)t1);
int index = tableview.getSelectionModel().getSelectedIndex();
data.get(index).name.setValue( (String) t1);
tableview.setItems(data);
* */
}
}
);
}
catch(ClassNotFoundException ce){
logger.info(ce.toString());
}
catch(SQLException ce){
logger.info(ce.toString());
}
} //initialize
private void buildData() {
data = FXCollections.observableArrayList();
try{
data.add(new Person("Jon", "Doe", "USA"));
data.add(new Person("Lars", "Andersson", "Sweden"));
tableview.setItems(data);
}
catch(Exception e){
e.printStackTrace();
System.out.println("Error on Building Data");
}
}
}
Person.java
public class Person {
public SimpleStringProperty name = new SimpleStringProperty();
public SimpleStringProperty surname = new SimpleStringProperty();
public SimpleStringProperty country = new SimpleStringProperty();
public Person(String name, String surname, String country){
this.name.set(name);
this.surname.set(surname);
this.country.set(country);
}
public String getName(){
return name.get();
}
public String getSurname(){
return surname.get();
}
public String getCountry(){
return country.get();
}
}
And for the sake of completeness I am giving the fxml file (very ugly but I am experimenting with the functionality;)) and the launcher
FXMLDocument.fxml
<?xml version="1.0" encoding="UTF-8"?>
<?import java.lang.*?>
<?import java.util.*?>
<?import javafx.scene.*?>
<?import javafx.scene.control.*?>
<?import javafx.scene.layout.*?>
<AnchorPane id="AnchorPane" blendMode="SRC_OVER" cache="false" disable="false" focusTraversable="false" prefHeight="576.0" prefWidth="1024.0" xmlns:fx="http://javafx.com/fxml/1" xmlns="http://javafx.com/javafx/2.2" fx:controller="javafxdemoproject.FXMLDocumentController">
<children>
<SplitPane dividerPositions="0.3336594911937378" focusTraversable="true" layoutX="0.0" layoutY="55.0" prefHeight="521.0" prefWidth="1024.0">
<items>
<AnchorPane minHeight="0.0" minWidth="0.0" prefHeight="410.0" prefWidth="297.0">
<children>
<TableView fx:id="tableview" editable="true" prefHeight="520.0" prefWidth="338.0" tableMenuButtonVisible="true" AnchorPane.bottomAnchor="178.0" AnchorPane.leftAnchor="0.0" AnchorPane.rightAnchor="0.0" AnchorPane.topAnchor="0.0">
<columns>
<TableColumn prefWidth="75.0" text="Name" fx:id="colName" />
<TableColumn maxWidth="5000.0" minWidth="10.0" prefWidth="154.0" text="Surname" fx:id="colSurname" />
<TableColumn maxWidth="5000.0" minWidth="10.0" prefWidth="112.0" text="Country" fx:id="colCountry" />
</columns>
</TableView>
</children>
</AnchorPane>
<AnchorPane minHeight="0.0" minWidth="0.0" prefHeight="404.0" prefWidth="460.0">
<children>
<Accordion layoutX="0.0" layoutY="0.0" prefHeight="520.0" prefWidth="262.0">
<expandedPane>
<TitledPane fx:id="personalTp" animated="false" text="Personal Details">
<content>
<AnchorPane id="Content" minHeight="0.0" minWidth="0.0" prefHeight="180.0" prefWidth="200.0">
<children>
<TextField fx:id="name" layoutX="44.0" layoutY="27.0" prefWidth="200.0" />
</children>
</AnchorPane>
</content>
</TitledPane>
</expandedPane>
<panes>
<fx:reference source="personalTp" />
<TitledPane fx:id="x2" animated="false" text="Positions held">
<content>
<AnchorPane id="Content" minHeight="0.0" minWidth="0.0" prefHeight="180.0" prefWidth="200.0">
<children>
<ListView prefHeight="621.0" prefWidth="454.0" AnchorPane.bottomAnchor="-2.0" AnchorPane.leftAnchor="0.0" AnchorPane.rightAnchor="0.0" AnchorPane.topAnchor="74.0" />
</children>
</AnchorPane>
</content>
</TitledPane>
</panes>
</Accordion>
</children>
</AnchorPane>
</items>
</SplitPane>
<MenuBar layoutY="0.0" AnchorPane.rightAnchor="908.0">
<menus>
<Menu mnemonicParsing="false" text="File">
<items>
<MenuItem mnemonicParsing="false" text="Close" />
</items>
</Menu>
<Menu mnemonicParsing="false" text="Edit">
<items>
<MenuItem mnemonicParsing="false" text="Delete" />
</items>
</Menu>
<Menu mnemonicParsing="false" text="Help">
<items>
<MenuItem mnemonicParsing="false" text="About" />
</items>
</Menu>
</menus>
</MenuBar>
<ToolBar layoutY="24.0" AnchorPane.leftAnchor="0.0">
<items>
<Button mnemonicParsing="false" text="Button" />
</items>
</ToolBar>
</children>
</AnchorPane>
JavaFXDemoProject.java
public class JavaFXDemoProject extends Application {
@Override
public void start(Stage stage) throws Exception {
Parent root = FXMLLoader.load(getClass().getResource("FXMLDocument.fxml"));
Scene scene = new Scene(root);
stage.setScene(scene);
stage.show();
}
/**
* @param args the command line arguments
*/
public static void main(String[] args) {
launch(args);
}
}
Questions
1) Is it at all possible what I am trying to do?
2) Why isn't this working with bidirectionalBinding
Any help appreciated
回答1:
I changed your controller class like this
public void initialize(URL url, ResourceBundle rb) {
assert tableview != null : "fx:id=\"tableview\" was not injected: check your FXML file 'UserMaster.fxml'.";
colName.setCellValueFactory(
new PropertyValueFactory<Person,String>("name"));
colSurname.setCellValueFactory(
new PropertyValueFactory<Person,String>("surname"));
colCountry.setCellValueFactory(
new PropertyValueFactory<Person,String>("country"));
buildData();
tableview.getSelectionModel().selectedItemProperty().addListener(new ChangeListener<Person>() {
@Override
public void changed(ObservableValue<? extends Person> observable, Person oldValue, Person newValue) {
if (oldValue !=null) name.textProperty().unbindBidirectional(oldValue.nameProperty());
if (newValue !=null) name.textProperty().bindBidirectional(newValue.nameProperty());
}
});
} //initialize
and your person class a bit
public class Person {
private StringProperty name = new SimpleStringProperty();
private StringProperty surname = new SimpleStringProperty();
private StringProperty country = new SimpleStringProperty();
public Person(String name, String surname, String country){
this.name.set(name);
this.surname.set(surname);
this.country.set(country);
}
public StringProperty nameProperty(){return name;}
public StringProperty surnameProperty(){return surname;}
public StringProperty countryProperty(){return country;}
}
Now the TextField can bind to the property in Person
来源：https://stackoverflow.com/questions/23014569/edit-the-values-of-the-tableview-from-textfield