javafx CheckListView与自定义对象一起显示特定属性

Question

我的应用程序中有controlsfx CheckListView.我正在显示我的自定义对象(例如:Employee).我已经创建并包装在可观察列表中的员工对象列表.现在我将可观察列表设置为我的CheckListView.

checkListView.setItems(employeesObservableList);

直到这里一切正常.

由于我绑定了雇员对象,因此在列表视图中,每个复选框值都是我的Employee对象的toString().我不想在那里使用toString()值,而是希望显示employee(eno)的其他属性.

我在这里看不到cellValueFactory,我不知道如何利用cellFactory来完成我的任务,因为CheckListView已经设置了自己的cellFactory.

所以我的问题是我想要一个带有我选择的复选框值的CheckListView.

提前致谢!

Answer 1

由使用的清单电池CheckListView是标准CheckBoxListCell的javafx.scene.control.cell.所以你可以覆盖以下内容cellFactory:

checkListView.setCellFactory(listView -> new CheckBoxListCell(checkListView::getItemBooleanProperty) {
    @Override
    public void updateItem(Employee employee, boolean empty) {
        super.updateItem(employee, empty);
        setText(employee == null ? "" : employee.getEno());
    }
});

注意,CheckBoxListCell<T>有一个构造函数Callback<T, BooleanProperty>指定显示该项的复选框的boolean属性; CheckListView定义一个getItemBooleanProperty(T item)完全返回此值的方法,因此可以使用方法引用将其直接传递给构造函数.

这是一个SSCCE:

import org.controlsfx.control.CheckListView;

import javafx.application.Application;
import javafx.beans.property.IntegerProperty;
import javafx.beans.property.SimpleIntegerProperty;
import javafx.beans.property.SimpleStringProperty;
import javafx.beans.property.StringProperty;
import javafx.collections.FXCollections;
import javafx.collections.ListChangeListener;
import javafx.collections.ObservableList;
import javafx.scene.Scene;
import javafx.scene.control.cell.CheckBoxListCell;
import javafx.stage.Stage;

public class CheckListViewTest extends Application {


    @Override
    public void start(Stage primaryStage) {
        primaryStage.setTitle("Test");

        CheckListView<Employee> checkListView = new CheckListView<Employee>();

        ObservableList<Employee> oblist = FXCollections.observableArrayList();
        for (int i = 1; i <= 40; i++) {
            oblist.add(new Employee("Employee " + i, i));
        }
        checkListView.setItems(oblist);

        checkListView.setCellFactory(lv -> new CheckBoxListCell<Employee>(checkListView::getItemBooleanProperty) {
            @Override
            public void updateItem(Employee employee, boolean empty) {
                super.updateItem(employee, empty);
                setText(employee == null ? "" : String.format("Employee number: %04d", employee.getEno()));
            }
        });

        checkListView.getCheckModel().getCheckedIndices().addListener(new ListChangeListener<Integer>() {
            @Override
            public void onChanged(javafx.collections.ListChangeListener.Change<? extends Integer> c) {
                while (c.next()) {
                    if (c.wasAdded()) {
                        for (int i : c.getAddedSubList()) {
                            System.out.println(checkListView.getItems().get(i).getName() + " selected");
                        }
                    }
                    if (c.wasRemoved()) {
                        for (int i : c.getRemoved()) {
                            System.out.println(checkListView.getItems().get(i).getName() + " deselected");
                        }
                    }
                }
            }
        });


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

    public static class Employee {
        private final StringProperty name = new SimpleStringProperty();
        private final IntegerProperty eno = new SimpleIntegerProperty();
        public Employee(String name, int eno) {
            setName(name) ;
            setEno(eno);
        }
        public final StringProperty nameProperty() {
            return this.name;
        }

        public final String getName() {
            return this.nameProperty().get();
        }

        public final void setName(final String name) {
            this.nameProperty().set(name);
        }

        public final IntegerProperty enoProperty() {
            return this.eno;
        }

        public final int getEno() {
            return this.enoProperty().get();
        }

        public final void setEno(final int eno) {
            this.enoProperty().set(eno);
        }


    }

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

结果如何