Problem
I want to add data dynamically to a TableView and scroll to the new data's position. But when the rows in the TableView reach the ViewPort size, I get this in the console:
Apr 18, 2015 9:14:34 AM com.sun.javafx.scene.control.skin.VirtualFlow addTrailingCells INFO: index exceeds maxCellCount. Check size calculations for class javafx.scene.control.TableRow
So I guess I did something wrong. All I did was using the Oracle TableView example and add this:
// button to add new data
Button bt = new Button( "Add");
bt.setOnAction(e -> {
// insert new item
int i = data.size() + 1;
Person person = new Person( "Name " + i, "Name " + i, "Mail " + i);
data.add( person);
// scroll to new item
table.scrollTo( person);
});
The same happens when you use
table.getItems().add( person);
instead of modifying the list.
The culprit is the scrollTo method. The same info/error occurs when you use the row index with the scrollTo method.
Question
How do you add new items correctly to a TableView, so that the info/error doesn't show up?
Code
Here's a full example. The table is pre-filled. If you hit the Add button the viewport size is reached and the info (or error?) is displayed in the console.
public class TableViewSample extends Application {
private TableView<Person> table = new TableView<Person>();
private final ObservableList<Person> data = FXCollections.observableArrayList();
public static void main(String[] args) {
launch(args);
}
@Override
public void start(Stage stage) {
Scene scene = new Scene(new Group());
stage.setTitle("Table View Sample");
stage.setWidth(450);
stage.setHeight(500);
table.setEditable(true);
TableColumn firstNameCol = new TableColumn("First Name");
firstNameCol.setMinWidth(100);
firstNameCol.setCellValueFactory(
new PropertyValueFactory<Person, String>("firstName"));
TableColumn lastNameCol = new TableColumn("Last Name");
lastNameCol.setMinWidth(100);
lastNameCol.setCellValueFactory(
new PropertyValueFactory<Person, String>("lastName"));
TableColumn emailCol = new TableColumn("Email");
emailCol.setMinWidth(200);
emailCol.setCellValueFactory(
new PropertyValueFactory<Person, String>("email"));
table.setItems(data);
table.getColumns().addAll(firstNameCol, lastNameCol, emailCol);
// -------------------------------
// dynamically add data
// -------------------------------
// fill table with data
for( int i=0; i < 14; i++) {
Person person = new Person( "Name " + i, "Name " + i, "Mail " + i);
data.add( person);
}
// button to add new data
Button bt = new Button( "Add");
bt.setOnAction(e -> {
// insert new item
int i = data.size() + 1;
Person person = new Person( "Name " + i, "Name " + i, "Mail " + i);
data.add( person);
// scroll to new item
table.scrollTo( person);
});
// -------------------------------
final VBox vbox = new VBox();
vbox.setSpacing(5);
vbox.getChildren().addAll(table, bt);
((Group) scene.getRoot()).getChildren().addAll(vbox);
stage.setScene(scene);
stage.show();
}
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);
}
}
}
