JavaFx如何在TableView中设置特定行的行背景颜色 [英] JavaFx How to set row background color of specifics rows in TableView

问题描述

我正在使用带有2列的TabelView：

I'm using TabelView with 2 columns:

@FXML
private TableView<Person> personTable;
@FXML
private TableColumn<Person, String> firstNameColumn;
@FXML
private TableColumn<Person, String> lastNameColumn;


public class Person {

    private final StringProperty firstName;
    private final StringProperty lastName;


    /**
     * Default constructor.
     */
    public Person() {
        this(null, null);
    }

    /**
     * Constructor with some initial data.
     * 
     * @param firstName
     * @param lastName
     */
    public Person(String firstName, String lastName) {
        this.firstName = new SimpleStringProperty(firstName);
        this.lastName = new SimpleStringProperty(lastName);        
    }

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

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

    public StringProperty firstNameProperty() {
        return firstName;
    }

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

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

    public StringProperty lastNameProperty() {
        return lastName;
    }


}

我有一个计算行号的逻辑，我需要将此行的背景设置为红色（每隔几秒钟我计算一行，我需要将caculcated行背景设置为红色。

I have a logic which calculate row number, and I need to set the background of this row to red (every several seconds I'm calculating the row and I need to set the caculcated row background to red.

我检查那些Q：

JavaFX中的着色表行

但它确实有帮助。
所以我可以设置一个随机行，它是背景颜色吗？ / p>

But it does help. So I can I set a random row, it's background color ?

推荐答案

根据您的需要，您可以这样做：

Depending on exactly what you need, you can do:

ObjectProperty<Person> criticalPerson = new SimpleObjectProperty<>();

personTable.setRowFactory(tv -> {
    TableRow<Person> row = new TableRow<>();
    BooleanBinding critical = row.itemProperty().isEqualTo(criticalPerson);
    row.styleProperty().bind(Bindings.when(critical)
        .then("-fx-background-color: red ;")
        .otherwise(""));
    return row ;
});

这是一个SSCCE：

import java.util.function.Function;

import javafx.application.Application;
import javafx.beans.binding.Bindings;
import javafx.beans.binding.BooleanBinding;
import javafx.beans.property.ObjectProperty;
import javafx.beans.property.SimpleObjectProperty;
import javafx.beans.property.SimpleStringProperty;
import javafx.beans.property.StringProperty;
import javafx.beans.value.ObservableValue;
import javafx.geometry.Insets;
import javafx.geometry.Pos;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.TableColumn;
import javafx.scene.control.TableRow;
import javafx.scene.control.TableView;
import javafx.scene.layout.BorderPane;
import javafx.scene.layout.HBox;
import javafx.stage.Stage;

public class HighlightTableRows extends Application {

    @Override
    public void start(Stage primaryStage) {


        TableView<Person> table = new TableView<>();
        table.getColumns().add(column("First Name", Person::firstNameProperty));
        table.getColumns().add(column("Last Name", Person::lastNameProperty));

        for (int i = 1 ; i <=50 ; i++) {
            table.getItems().add(new Person("Person"+i, "McPerson"+i));
        }

        ObjectProperty<Person> criticalPerson = new SimpleObjectProperty<>();


        table.setRowFactory(tv -> {
            TableRow<Person> row = new TableRow<>();
            BooleanBinding critical = row.itemProperty().isEqualTo(criticalPerson).and(row.itemProperty().isNotNull());
            row.styleProperty().bind(Bindings.when(critical)
                .then("-fx-background-color: red ;")
                .otherwise(""));
            return row ;
        });

        BorderPane root = new BorderPane(table);

        Button apply = new Button("Make critical");
        apply.setOnAction(e -> criticalPerson.set(table.getSelectionModel().getSelectedItem()));
        apply.disableProperty().bind(table.getSelectionModel().selectedItemProperty().isNull());
        Button clear = new Button("Clear");
        clear.setOnAction(e -> criticalPerson.set(null));

        HBox controls = new HBox(5, apply, clear);
        controls.setAlignment(Pos.CENTER);
        controls.setPadding(new Insets(5));
        root.setBottom(controls);

        Scene scene = new Scene(root);
        primaryStage.setScene(scene);
        primaryStage.show();
    }

    private <S,T> TableColumn<S,T> column(String text, Function<S, ObservableValue<T>> prop) {
        TableColumn<S,T> col = new TableColumn<>(text);
        col.setCellValueFactory(cellData -> prop.apply(cellData.getValue()));
        return col ;
    }

    public class Person {

        private final StringProperty firstName;
        private final StringProperty lastName;

        /**
         * Default constructor.
         */
        public Person() {
            this(null, null);
        }

        /**
         * Constructor with some initial data.
         * 
         * @param firstName
         * @param lastName
         */
        public Person(String firstName, String lastName) {
            this.firstName = new SimpleStringProperty(firstName);
            this.lastName = new SimpleStringProperty(lastName);
        }

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

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

        public StringProperty firstNameProperty() {
            return firstName;
        }

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

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

        public StringProperty lastNameProperty() {
            return lastName;
        }

    }

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

如果多行可能需要同时为红色时间，使用 ObservableList 进行明显的修改，其中包含行应为红色等的项目。您还可以考虑添加 BooleanProperty 到模型类并让表行观察它。

If multiple rows might need to be red at the same time, make the obvious modifications with an ObservableList containing the items whose rows should be red, etc. You might also consider adding a BooleanProperty to the model class and letting the table row observe it.

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