我目前正在尝试使用TableView过滤CheckComboBox。作为参考，我使用here.的源代码问题是CheckComboBox的值（或属性）是ArrayList，不像普通的ComboBox，所以我不能使用绑定+ valueProperty()etc。在选择或更改某些内容时更新我的TableView。
我想要实现的是，如果我从genderFilterCheckCombo中选择一个（或多个）性别，那么TableView将仅显示所有具有第一性别（或两者）的人。如果在那之后我在nameFilter上键入“Jacob”，那么TableView现在会显示所有名字为Jacob的人，并且有性别Male或Male和Female。如果您有更好的方法来实现这一目标，请告诉我。
这是代码，你需要一个来自here.的ControlsFX的JAR文件
import java.time.LocalDate;
import java.util.Arrays;
import java.util.List;
import java.util.function.Function;
import java.util.function.Predicate;
import javafx.application.Application;
import javafx.beans.binding.Bindings;
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.collections.FXCollections;
import javafx.collections.transformation.FilteredList;
import javafx.geometry.Insets;
import javafx.scene.Scene;
import javafx.scene.control.*;
import javafx.scene.layout.BorderPane;
import javafx.scene.layout.HBox;
import javafx.stage.Stage;
import org.controlsfx.control.CheckComboBox;
public class MainApp extends Application {
@Override
public void start(Stage primaryStage) {
TableView<Person> table = new TableView<>();
table.getColumns().add(column("Name", Person::nameProperty));
table.getColumns().add(column("Email", Person::emailProperty));
table.getColumns().add(column("Gender", Person::genderProperty));
table.getColumns().add(column("Birthday",Person::birthdayProperty));
ComboBox<Person.Gender> genderFilterCombo = new ComboBox<>();
genderFilterCombo.getItems().addAll(Person.Gender.values());
CheckComboBox<Person.Gender> genderFilterCheckCombo= new CheckComboBox<>();
genderFilterCheckCombo.getItems().addAll(Person.Gender.values());
TextField nameFilterField = new TextField();
DatePicker datefromFilterField = new DatePicker();
DatePicker dateuntilFilterField = new DatePicker();
ObjectProperty<Predicate<Person>> nameFilter = new SimpleObjectProperty<>();
ObjectProperty<Predicate<Person>> genderFilter = new SimpleObjectProperty<>();
ObjectProperty<Predicate<Person>> gender2Filter = new SimpleObjectProperty<>();
ObjectProperty<Predicate<Person>> datefromFilter = new SimpleObjectProperty<>();
ObjectProperty<Predicate<Person>> dateuntilFilter = new SimpleObjectProperty<>();
// ArrayList arr = java.util.Arrays.asList(Person.Gender.values());
nameFilter.bind(Bindings.createObjectBinding(() ->
person -> person.getName().toLowerCase().contains(nameFilterField.getText().toLowerCase()),
nameFilterField.textProperty()));
genderFilter.bind(Bindings.createObjectBinding(() ->
person -> genderFilterCombo.getValue() == null || genderFilterCombo.getValue() == person.getGender(),
genderFilterCombo.valueProperty()));
////////////HERE//////////////
gender2Filter.bind(Bindings.createObjectBinding(() ->
person -> genderFilterCheckCombo.getCheckModel().getCheckedItems().isEmpty() ||
genderFilterCheckCombo.getCheckModel().getCheckedItems().contains(Person.Gender.MALE)||
genderFilterCheckCombo.getCheckModel().getCheckedItems().contains(Person.Gender.FEMALE),
genderFilterCheckCombo.checkModelProperty()));
datefromFilter.bind(Bindings.createObjectBinding(() ->
person -> datefromFilterField.getValue() == null || datefromFilterField.getValue().isBefore(person.getBirthday())
|| datefromFilterField.getValue().isEqual(person.getBirthday()),
datefromFilterField.valueProperty()));
dateuntilFilter.bind(Bindings.createObjectBinding(() ->
person -> dateuntilFilterField.getValue() == null || dateuntilFilterField.getValue().isAfter(person.getBirthday())
|| dateuntilFilterField.getValue().isEqual(person.getBirthday()),
dateuntilFilterField.valueProperty()));
FilteredList<Person> filteredItems = new FilteredList<>(FXCollections.observableList(createData()));
table.setItems(filteredItems);
filteredItems.predicateProperty().bind(Bindings.createObjectBinding(
() -> nameFilter.get().and(genderFilter.get().and(gender2Filter.get().and(datefromFilter.get().and(dateuntilFilter.get())))),
nameFilter, genderFilter, gender2Filter, datefromFilter, dateuntilFilter));
Button clear = new Button("Clear Filters");
clear.setOnAction(e -> {
genderFilterCombo.setValue(null);
// genderFilterCheckCombo.getCheckModel().clearChecks();
System.out.println(genderFilterCombo.valueProperty());
System.out.println(genderFilterCheckCombo.checkModelProperty());
System.out.println(genderFilterCheckCombo.getCheckModel().getCheckedItems());
System.out.println(genderFilterCheckCombo.getCheckModel().getCheckedItems().isEmpty());
System.out.println(genderFilterCheckCombo.getCheckModel().getCheckedItems().contains(Person.Gender.MALE) ||
genderFilterCheckCombo.getCheckModel().getCheckedItems().contains(Person.Gender.FEMALE) );
nameFilterField.clear();
datefromFilterField.setValue(null);
dateuntilFilterField.setValue(null);
});
HBox filters = new HBox(5, nameFilterField, genderFilterCombo, datefromFilterField, dateuntilFilterField, genderFilterCheckCombo, clear);
filters.setPadding(new Insets(5));
BorderPane root = new BorderPane(table, filters, null, null, null);
Scene scene = new Scene(root, 800, 600);
primaryStage.setScene(scene);
primaryStage.show();
}
private List<Person> createData() {
return Arrays.asList(
new Person("Jacob Smith", "[email protected]", Person.Gender.MALE, LocalDate.parse("2018-08-25")),
new Person("Jacob Smith", "[email protected]", Person.Gender.MALE, LocalDate.parse("2018-08-26")),
new Person("Jacob Smith", "[email protected]", Person.Gender.FEMALE, LocalDate.parse("2018-08-26")),
new Person("Jacob Smith", "[email protected]", Person.Gender.MALE, LocalDate.parse("2018-08-25")),
new Person("Isabella Johnson", "[email protected]", Person.Gender.FEMALE, LocalDate.parse("2018-08-21")),
new Person("Ethan Williams", "[email protected]", Person.Gender.MALE, LocalDate.parse("2018-08-21")),
new Person("Emma Jones", "[email protected]", Person.Gender.FEMALE, LocalDate.parse("2018-08-29")),
new Person("Michael Brown", "[email protected]", Person.Gender.MALE, LocalDate.parse("2018-08-05"))
);
}
private static <S,T> TableColumn<S,T> column(String title, Function<S, ObservableValue<T>> property) {
TableColumn<S,T> col = new TableColumn<>(title);
col.setCellValueFactory(cellData -> property.apply(cellData.getValue()));
return col ;
}
public static class Person {
// List<Gender> abc = Arrays.asList(Person.Gender.values());
public enum Gender {MALE, FEMALE }
private final StringProperty name = new SimpleStringProperty();
private final StringProperty email = new SimpleStringProperty() ;
private final ObjectProperty<Gender> gender = new SimpleObjectProperty<>();
private final ObjectProperty<LocalDate> birthday = new SimpleObjectProperty<>();
public Person(String name, String email, Gender gender, LocalDate birthday) {
setName(name);
setEmail(email);
setGender(gender);
setBirthday(birthday);
}
public final ObjectProperty<LocalDate> birthdayProperty(){
return this.birthday;
}
public final LocalDate getBirthday() {
return this.birthdayProperty().get();
}
public final void setBirthday(final LocalDate birthday) {
this.birthdayProperty().set(birthday);
}
public final StringProperty emailProperty() {
return this.email;
}
public final String getEmail() {
return this.emailProperty().get();
}
public final void setEmail(final String email) {
this.emailProperty().set(email);
}
public final ObjectProperty<Gender> genderProperty() {
return this.gender;
}
public final Gender getGender() {
return this.genderProperty().get();
}
public final void setGender(final Gender gender) {
this.genderProperty().set(gender);
}
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 static void main(String[] args) {
launch(args);
}
}
为此目的使用CheckModel's checkedItems
gender2Filter.bind(Bindings.createObjectBinding(() -> genderFilterCheckCombo.getCheckModel().getCheckedItems().isEmpty()
? null
: person -> genderFilterCheckCombo.getCheckModel().getCheckedItems().contains(person.getGender()),
genderFilterCheckCombo.getCheckModel().getCheckedItems()));
上述绑定适用于predicate的FilteredList属性。由于您以不同的方式创建该绑定，因此需要从绑定返回非null对象：
gender2Filter.bind(Bindings.createObjectBinding(() -> genderFilterCheckCombo.getCheckModel().getCheckedItems().isEmpty()
? person -> true
: person -> genderFilterCheckCombo.getCheckModel().getCheckedItems().contains(person.getGender()),
genderFilterCheckCombo.getCheckModel().getCheckedItems()));