JavaFx：ComboBox textWrap

Question

我试图将文本包装在ComboBox中，但我无法真正管理它。

我需要在编辑器部分中包装文本，而不是在comboBox的下拉部分。我看到编辑器是一个TextField，它的文字不能真正包装或？

是否有任何技巧或解决方案有一个很好的包装文本，所以如果我有一个很长的文本，我每次都可以看到它？

因此，我希望显示整个文本，而不是显示...。

代码部分我不知道我是否应该添加，因为它是非常简单的表格单元格，并且ComboBox设置为Graphics，但如果它有帮助我将编辑问题。

注意：将列设置得更宽以使文本适合，不是解决方案！

这是一个截图：

Answer 1

我对这个问题感到有点困惑。您希望在编辑时或在非编辑模式下显示包装的文本。？因为如果您处于编辑模式，则无法在文本框中看到...因此，我假设您要求从弹出列表中选择并且组合未处于编辑模式时显示包装文本。我们可以使用buttonCell修复它。

如果这是你不想要的，那么Minimal, Complete, and Verifiable example可以帮助我调查实际问题。

请参阅以下代码，了解如何显示包装文本。

import javafx.application.Application;
import javafx.beans.property.SimpleStringProperty;
import javafx.collections.FXCollections;
import javafx.collections.ObservableList;
import javafx.geometry.Insets;
import javafx.scene.Scene;
import javafx.scene.control.*;
import javafx.scene.control.cell.PropertyValueFactory;
import javafx.scene.layout.StackPane;
import javafx.scene.layout.VBox;
import javafx.scene.text.Font;
import javafx.scene.text.Text;
import javafx.stage.Stage;
import javafx.util.Callback;

public class TableViewComboBoxCell extends Application {

    private TableView<Person> table = new TableView<Person>();

    private final ObservableList<Person> data = FXCollections
            .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]"));


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

    private final ObservableList<String> comboList = FXCollections.observableArrayList("First big sentence with very long text to check the text wrap",
            "Second big sentence with very long text to check the text wrap",
            "Third big sentence with very long text to check the text wrap",
            "Fourth big sentence with very long text to check the text wrap");

    @Override
    public void start(Stage stage) {
        for (int i = 0; i < 50; i++) {
            if(i%5==0){
                data.add(new Person("Name " + i, "Last " + i, "Mail " + i, comboList.get(0)));
            }else {
                data.add(new Person("Name " + i, "Last " + i, "Mail " + i));
            }
        }
        Scene scene = new Scene(new StackPane());
        stage.setTitle("Table View Sample");
        stage.setWidth(650);
        stage.setHeight(500);

        final Label label = new Label("Address Book");
        label.setFont(new Font("Arial", 20));

        TableColumn<Person, String> firstNameCol = new TableColumn<>("First Name");
        firstNameCol.setMinWidth(100);
        firstNameCol
                .setCellValueFactory(new PropertyValueFactory<Person, String>(
                        "firstName"));

        TableColumn<Person, String> lastNameCol = new TableColumn<>("Last Name");
        lastNameCol.setMinWidth(100);
        lastNameCol
                .setCellValueFactory(new PropertyValueFactory<Person, String>(
                        "lastName"));

        TableColumn<Person, String> emailCol = new TableColumn<>("Email");
        emailCol.setMinWidth(200);
        emailCol.setCellValueFactory(new PropertyValueFactory<Person, String>(
                "email"));

        TableColumn<Person, String> comboCol = new TableColumn<>("Combo");
        comboCol.setMinWidth(200);
        comboCol.setCellValueFactory(new PropertyValueFactory<Person, String>(
                "combo"));
        comboCol.setCellFactory(new Callback<TableColumn<Person, String>, TableCell<Person, String>>() {
            @Override
            public TableCell<Person, String> call(TableColumn<Person, String> param) {
                return new TableCell<Person, String>() {
                    private ComboBox<String> combo;

                    @Override
                    protected void updateItem(String item, boolean empty) {
                        super.updateItem(item, empty);
                        getCombo().getSelectionModel().clearSelection();
                        if (!empty) {
                            getCombo().setValue(item);
                            setGraphic(getCombo());
                        } else {
                            setGraphic(null);
                        }
                    }

                    private ComboBox<String> getCombo() {
                        if (combo == null) {
                            combo = new ComboBox<>();
                            combo.setItems(comboList);
                            combo.getSelectionModel().selectedItemProperty().addListener((obs, old, newVal) -> {
                                ((Person) getTableRow().getItem()).setCombo(newVal);
                            });
                            combo.setButtonCell(new ListCell<String>() {
                                private Text textLbl;
                                @Override
                                protected void updateItem(String item, boolean empty) {
                                    super.updateItem(item, empty);
                                    setGraphic(null);
                                    if (!empty) {
                                        getTextLbl().setText(item);
                                        setGraphic(getTextLbl());
                                    }
                                }

                                private Text getTextLbl(){
                                    if(textLbl ==null){
                                        textLbl = new Text();
                                        textLbl.wrappingWidthProperty().bind(this.widthProperty().subtract(10));
                                    }
                                    return textLbl;
                                }
                            });
                        }
                        return combo;
                    }
                };
            }
        });
        table.setItems(data);
        table.getColumns().addAll(firstNameCol, lastNameCol, emailCol, comboCol);

        final VBox vbox = new VBox();
        vbox.setSpacing(5);
        vbox.setPadding(new Insets(10, 0, 0, 10));
        vbox.getChildren().addAll(label, table);
        ((StackPane) 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 final SimpleStringProperty combo;

        private Person(String fName, String lName, String email) {
            this(fName,lName,email,null);
        }

        private Person(String fName, String lName, String email, String comboStr) {
            this.firstName = new SimpleStringProperty(fName);
            this.lastName = new SimpleStringProperty(lName);
            this.email = new SimpleStringProperty(email);
            this.combo = new SimpleStringProperty(comboStr);
        }

        public String getFirstName() {
            return firstName.get();
        }

        public SimpleStringProperty firstNameProperty() {
            return firstName;
        }

        public void setFirstName(String firstName) {
            this.firstName.set(firstName);
        }

        public String getLastName() {
            return lastName.get();
        }

        public SimpleStringProperty lastNameProperty() {
            return lastName;
        }

        public void setLastName(String lastName) {
            this.lastName.set(lastName);
        }

        public String getEmail() {
            return email.get();
        }

        public SimpleStringProperty emailProperty() {
            return email;
        }

        public void setEmail(String email) {
            this.email.set(email);
        }

        public String getCombo() {
            return combo.get();
        }

        public SimpleStringProperty comboProperty() {
            return combo;
        }

        public void setCombo(String combo) {
            this.combo.set(combo);
        }
    }
}

输出如下：