JavaFX Label truncated, see https://github.com/openjdk/jfx/pull/1389/

TableViewExampleTruncated.java

import javafx.application.Application;
import javafx.beans.binding.Bindings;
import javafx.beans.property.ReadOnlyBooleanProperty;
import javafx.beans.property.ReadOnlyBooleanWrapper;
import javafx.beans.property.SimpleStringProperty;
import javafx.beans.property.StringProperty;
import javafx.collections.FXCollections;
import javafx.collections.ObservableList;
import javafx.scene.Scene;
import javafx.scene.control.*;
import javafx.scene.control.cell.TextFieldTableCell;
import javafx.scene.layout.BorderPane;
import javafx.scene.layout.VBox;
import javafx.stage.Stage;
import javafx.util.converter.DefaultStringConverter;

public class TableViewExampleTruncated extends Application {

    private final TableView<Person> table = new TableView<>();
    private final ObservableList<Person> data =
            FXCollections.observableArrayList(
                    new Person("[email protected]"),
                    new Person("[email protected]"),
                    new Person("[email protected]"),
                    new Person("[email protected]"),
                    new Person("[email protected]"));

    public static void main(String[] args) {
        launch(args);
    }

    static void changeTooltip(Labeled labeled, boolean b) {
        System.out.println("Tooltip for '" + labeled.getText() + "' --> " + b);
        if (b) {
            labeled.setTooltip(new Tooltip(labeled.getText()));
        } else {
            labeled.setTooltip(null);
        }
    }

    @Override
    public void start(Stage stage) {
        stage.setTitle("Table View Sample");
        stage.setWidth(450);
        stage.setHeight(550);

        // TableView
        table.setEditable(true);

        TableColumn<Person, String> emailCol = new TableColumn<>("Email");
        emailCol.setCellValueFactory(param -> param.getValue().emailProperty());
        // emailCol.setCellFactory(TextFieldTableCell.forTableColumn());
        emailCol.setCellFactory((tableColumn) -> new TextFieldTableCell<>(new DefaultStringConverter()) {
//            ReadOnlyBooleanWrapper tableCellTextTruncated;

            @Override
            public void updateItem(String item, boolean empty) {
                super.updateItem(item, empty);

                System.out.println("Recalculating for TableCell: " + this.getText());
                if (isWrapText()) {
                    boolean b1 = (getHeight() < prefHeight(getWidth()));
                    System.out.println("\tTable-Email-Cell isWrapText: " + getHeight() + " < " + prefHeight(getWidth()) + " --> " + b1);
                    changeTooltip(this, b1);
                    return;
                }
                boolean b2 = (getWidth() < prefWidth(-1));
                System.out.println("\tTable-Email-Cell !isWrapText: " + getWidth() + " < " + prefWidth(-1) + " --> " + b2);
                changeTooltip(this, b2);

//                // Note: can not re-use a ReadOnlyBooleanWrapper since TableCells are re-used in JavaFX heavily
//                if (tableCellTextTruncated == null) {
//                    tableCellTextTruncated = new ReadOnlyBooleanWrapper(this, "textTruncated");
//                    tableCellTextTruncated.bind(Bindings.createBooleanBinding(() -> {
//                                System.out.println("Recalculating for TableCell: " + this.getText());
//                                if (isWrapText()) {
//                                    boolean b1 = (getHeight() < prefHeight(getWidth()));
//                                    System.out.println("\tTable-Email-Cell isWrapText: " + getHeight() + " < " + prefHeight(getWidth()) + " --> " + b1);
//                                    return b1;
//                                }
//                                boolean b2 = (getWidth() < prefWidth(-1));
//                                System.out.println("\tTable-Email-Cell !isWrapText: " + getWidth() + " < " + prefWidth(-1) + " --> " + b2);
//                                return b2;
//                            },
//                            ellipsisStringProperty(),
//                            fontProperty(),
//                            heightProperty(),
//                            textProperty(),
//                            widthProperty(),
//                            wrapTextProperty()
//                    ));
//                }
            }
        });
        emailCol.setOnEditCommit(t -> t.getTableView().getItems().get(t.getTablePosition().getRow()).emailProperty().set(t.getNewValue()));

        table.setItems(data);
        table.getColumns().addAll(emailCol);


        // Label Test
        final MyLabel label = new MyLabel("A text which can be extended");
        label.textTruncatedProperty().addListener((observableValue, aBoolean, t1) -> changeTooltip(label, t1));
        final Button bAdd = new Button("Add text to label above");
        bAdd.setOnAction(event -> label.setText(label.getText() + " " + System.currentTimeMillis()));
        final Button bReset = new Button("Reset text");
        bReset.setOnAction(event -> label.setText("A text which can be extended"));

        // Layout
        BorderPane pb = new BorderPane();
        pb.setCenter(table);
        pb.setBottom(new VBox(new Label(" - - - - - - - - "), label, bAdd, bReset));

        Scene scene = new Scene(pb);
        stage.setScene(scene);
        stage.show();
    }

    static class MyLabel extends Label {

        private ReadOnlyBooleanWrapper textTruncated;

        public MyLabel(String text) {
            super(text);
        }

        public final ReadOnlyBooleanProperty textTruncatedProperty() {
            if (textTruncated == null) {
                textTruncated = new ReadOnlyBooleanWrapper(this, "textTruncated");
                textTruncated.bind(Bindings.createBooleanBinding(() -> {
                            if (isWrapText()) {
                                return (getHeight() < prefHeight(getWidth()));
                            }
                            return (getWidth() < prefWidth(-1));
                        },
                        ellipsisStringProperty(),
                        fontProperty(),
                        heightProperty(),
                        textProperty(),
                        widthProperty(),
                        wrapTextProperty()
                ));
            }
            return textTruncated.getReadOnlyProperty();
        }

        public final boolean isTextTruncated() {
            return textTruncatedProperty().get();
        }
    }

    public static class Person {
        private final StringProperty email;

        private Person(String email) {
            this.email = new SimpleStringProperty(email);
        }

        public StringProperty emailProperty() {
            return email;
        }
    }
}