Problem
How should a selectedItemProperty reflect a multi row selection? It can't, because it was intended to use with SelectionMode.SINGLE.
Solution
You can use a ListChangeListener on your TableView or ListView instead. It's the recommended way in multiple selection models. With this you be able to know which row(-s) where deleted, updated, removed, etc. to the selection.
I've made an example based on the Table View Tutorial from Oracle. Don't be scared, it's a bit huge, but this lies in nature of Lists and Tables. I've marked the interesting sections with a comment.
Example
Here is a Minimal, Complete, and Verifiable example
import javafx.application.Application;
import javafx.beans.property.SimpleStringProperty;
import javafx.collections.FXCollections;
import javafx.collections.ListChangeListener;
import javafx.collections.ObservableList;
import javafx.geometry.Insets;
import javafx.scene.Group;
import javafx.scene.Scene;
import javafx.scene.control.Label;
import javafx.scene.control.SelectionMode;
import javafx.scene.control.TableColumn;
import javafx.scene.control.TableView;
import javafx.scene.control.cell.PropertyValueFactory;
import javafx.scene.layout.VBox;
import javafx.scene.text.Font;
import javafx.stage.Stage;
public class TableViewDemo extends Application {
private final TableView<Person> table = new TableView<>();
private final ObservableList<Person> data
= FXCollections.<Person>observableArrayList(
new Person("Jacob", "Smith", "[email protected]"),
new Person("Isabella", "Johnson", "[email protected]"),
new Person("Ethan", "Williams", "[email protected]"),
new Person("Emma", "Jones", "[email protected]"),
new Person("Michael", "Brown", "[email protected]")
);
@Override
public void start(Stage primaryStage) {
Scene scene = new Scene(new Group());
primaryStage.setTitle("Table View Sample");
primaryStage.setWidth(450);
primaryStage.setHeight(500);
final Label label = new Label("Address Book");
label.setFont(new Font("Arial", 20));
table.setEditable(true);
table.getSelectionModel().setSelectionMode(SelectionMode.MULTIPLE);
// begin of interesting code
table.getSelectionModel().getSelectedIndices().addListener(new ListChangeListener<Integer>() {
@Override
public void onChanged(ListChangeListener.Change<? extends Integer> c) {
while (c.next()) {
System.out.println("#######- Indicies -#######");
if (c.wasAdded()) {
c.getAddedSubList().stream().forEach((item) -> {
System.out.println("Added: " + item);
System.out.println("--------------------------");
});
}
if (c.wasRemoved()) {
c.getRemoved().stream().forEach((item) -> {
System.out.println("Removed: " + item);
System.out.println("--------------------------");
});
}
//c.wasPermutated();
//c.wasReplaced();
}
}
});
table.getSelectionModel().getSelectedItems().addListener(new ListChangeListener<Person>() {
@Override
public void onChanged(ListChangeListener.Change<? extends Person> c) {
while (c.next()) {
System.out.println("######- Items -########");
if (c.wasAdded()) {
c.getAddedSubList().stream().forEach((item) -> {
System.out.println("Added: " + item);
System.out.println("--------------------------");
});
}
if (c.wasRemoved()) {
c.getRemoved().stream().forEach((item) -> {
System.out.println("Removed: " + item);
System.out.println("--------------------------");
});
}
//c.wasPermutated();
//c.wasReplaced();
}
}
});
// end of interesting code
TableColumn<Person, String> firstNameCol = new TableColumn<>("First Name");
firstNameCol.setMinWidth(100);
firstNameCol.setCellValueFactory(
new PropertyValueFactory<>("firstName"));
TableColumn<Person, String> lastNameCol = new TableColumn<>("Last Name");
lastNameCol.setMinWidth(100);
lastNameCol.setCellValueFactory(
new PropertyValueFactory<>("lastName"));
TableColumn<Person, String> emailCol = new TableColumn<>("Email");
emailCol.setMinWidth(200);
emailCol.setCellValueFactory(
new PropertyValueFactory<>("email"));
table.setItems(data);
// I know this could be done by invoking addAll, but Xlint will give warning
table.getColumns().add(firstNameCol);
table.getColumns().add(lastNameCol);
table.getColumns().add(emailCol);
final VBox vbox = new VBox();
vbox.setSpacing(5);
vbox.setPadding(new Insets(10, 0, 0, 10));
vbox.getChildren().addAll(label, table);
((Group) scene.getRoot()).getChildren().addAll(vbox);
primaryStage.setScene(scene);
primaryStage.show();
}
public static void main(String[] args) {
launch(args);
}
public static class Person {
private final SimpleStringProperty firstName;
private final SimpleStringProperty lastName;
private final SimpleStringProperty email;
private Person(String fName, String lName, String email) {
this.firstName = new SimpleStringProperty(fName);
this.lastName = new SimpleStringProperty(lName);
this.email = new SimpleStringProperty(email);
}
public String getFirstName() {
return firstName.get();
}
public void setFirstName(String fName) {
firstName.set(fName);
}
public String getLastName() {
return lastName.get();
}
public void setLastName(String fName) {
lastName.set(fName);
}
public String getEmail() {
return email.get();
}
public void setEmail(String fName) {
email.set(fName);
}
@Override
public String toString() {
return "Person{" + "first name=" + firstName.get()
+ ", last name=" + lastName.get()
+ ", email=" + email.get() + '}';
}
}
}
Example output to console
######- Items -########
Added: Person{first name=Michael, last name=Brown, [email protected]}
--------------------------
Removed: Person{first name=Isabella, last name=Johnson, [email protected]}
--------------------------
Removed: Person{first name=Ethan, last name=Williams, [email protected]}
--------------------------
Removed: Person{first name=Emma, last name=Jones, [email protected]}
--------------------------
Removed: Person{first name=Jacob, last name=Smith, [email protected]}
--------------------------
#######- Indicies -#######
Added: 4
--------------------------
Removed: 1
--------------------------
Removed: 2
--------------------------
Removed: 3
--------------------------
Removed: 0
--------------------------
ListChangeListenersand wondered about the naming ofselectedItemProperty. It is quite error-prone since many code examples with changelisteners on selectedItemProperties are around and they seem to work at first sight. - Hans Huckebein