Question

我正在尝试将文本包装在ComboBox中，但我无法真正对其进行管理。

我需要在编辑器部分而不是comboBox的下拉部分中包装文本。我看到编辑器是TextField，并且它的文本不能真正包装或？

是否有任何技巧或解决方案来使文本包装好，所以如果我的文本太长，每次都能看到它？

因此，我不想显示...，而是希望显示整个文本。

我不知道是否应该添加代码部分，因为它是非常简单的表格单元，并且ComboBox设置为Graphics，但是如果有帮助，我将编辑问题。

注意：不能将列的宽度设置得更宽一些，这不是解决方案！

这是屏幕截图：

Answer 1

我对这个问题感到困惑。您要在编辑时还是在非编辑模式下显示换行的文本？因为如果您处于编辑模式，则在文本框中看不到...。因此，我假设您要在从弹出列表中选择后要求显示换行的文本，并且该组合不处于编辑模式。我们可以使用buttonCell进行修复。

如果这不是您要的，那么Minimal, Complete, and Verifiable example可以帮助我研究实际问题。

请参考以下代码以显示包装文本。

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", "jacob.smith@example.com"),
                    new Person("Isabella", "Johnson",
                            "isabella.johnson@example.com"),
                    new Person("Ethan", "Williams",
                            "ethan.williams@example.com"),
                    new Person("Emma", "Jones", "emma.jones@example.com"),
                    new Person("Michael", "Brown", "michael.brown@example.com"));


    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：

JavaFx：ComboBox textWrap

1 个答案: