JavaFX TableView Paginator

Question

如何在TableView paginator中使用。？。这个例子......

public class SampleController implements Initializable {

    @FXML private TableView<Student> table;
    @FXML private TableColumn<Student, Integer> id;
    @FXML private TableColumn<Student, String> name;
    @FXML private ObservableList<Student> list = FXCollections.observableArrayList();
    //  @FXML private Pagination pagination;
    // 
    private StudentSQL ssql = new StudentSQL();
    private Stage stage = new Stage();
    private String row;

    @Override
    public void initialize(URL url, ResourceBundle rb) {
        id.setCellValueFactory(new PropertyValueFactory<Student, Integer>("id"));
        name.setCellValueFactory(new PropertyValueFactory<Student, String>("name"));
        list = ssql.students();
        table.setItems(list);
    }
}

Answer 1

您必须使用Pagination控件并实现页面工厂。为每个应显示的页面调用工厂，您可以使用其参数pageIndex为TableView提供项目的子列表：

TableView table = ...

private Node createPage(int pageIndex) {

    int fromIndex = pageIndex * rowsPerPage;
    int toIndex = Math.min(fromIndex + rowsPerPage, data.size());
    table.setItems(FXCollections.observableArrayList(data.subList(fromIndex, toIndex)));

    return new BorderPane(table);
}


@Override
public void start(final Stage stage) throws Exception {

    Pagination pagination = new Pagination((data.size() / rowsPerPage + 1), 0);
    pagination.setPageFactory(this::createPage);
    ...
}

可在此处找到完整的可运行示例： https://gist.github.com/timbuethe/7becdc4556225e7c5b7b

Answer 2

以下是将TableView与Pagination控件集成的示例代码。

代码来自Shakir Quasaroff对Oracle {@ {}}控件的Oracle JavaFX论坛请求的回答。示例代码是纯Java解决方案，而不是原始问题中的Java Code / FXML混合。

import java.util.List;
import javafx.application.Application;
import javafx.beans.property.SimpleStringProperty;
import javafx.collections.FXCollections;
import javafx.collections.ObservableList;
import javafx.scene.Scene;
import javafx.scene.control.Pagination;
import javafx.scene.Node;
import javafx.scene.control.TableColumn;
import javafx.scene.control.TableView;
import javafx.scene.control.TextArea;
import javafx.scene.control.cell.PropertyValueFactory;
import javafx.scene.layout.AnchorPane;
import javafx.scene.layout.VBox;
import javafx.stage.Stage;
import javafx.util.Callback;

public class TablePager extends Application {

    final ObservableList<Person> data = FXCollections.observableArrayList(
            new Person("1", "Joe", "Pesci"),
            new Person("2", "Audrey", "Hepburn"),
            new Person("3", "Gregory", "Peck"),
            new Person("4", "Cary", "Grant"),
            new Person("5", "De", "Niro"),
            new Person("6", "Katharine", "Hepburn"),
            new Person("7", "Jack", "Nicholson"),
            new Person("8", "Morgan", "Freeman"),
            new Person("9", "Elizabeth", "Taylor"),
            new Person("10", "Marcello", "Mastroianni"),
            new Person("11", "Innokenty", "Smoktunovsky"),
            new Person("12", "Sophia", "Loren"),
            new Person("13", "Alexander", "Kalyagin"),
            new Person("14", "Peter", "OToole"),
            new Person("15", "Gene", "Wilder"),
            new Person("16", "Evgeny", "Evstegneev"),
            new Person("17", "Michael", "Caine"),
            new Person("18", "Jean-Paul", "Belmondo"),
            new Person("19", " Julia", "Roberts"),
            new Person("20", "James", "Stewart"),
            new Person("21", "Sandra", "Bullock"),
            new Person("22", "Paul", "Newman"),
            new Person("23", "Oleg", "Tabakov"),
            new Person("24", "Mary", "Steenburgen"),
            new Person("25", "Jackie", "Chan"),
            new Person("26", "Rodney", "Dangerfield"),
            new Person("27", "Betty", "White"),
            new Person("28", "Eddie", "Murphy"),
            new Person("29", "Amitabh", "Bachchan"),
            new Person("30", "Nicole", "Kidman"),
            new Person("31", "Adriano", "Celentano"),
            new Person("32", "Rhonda", " Fleming's"),
            new Person("32", "Humphrey", "Bogart"));
    private Pagination pagination;

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

    public int itemsPerPage() {
        return 1;
    }

    public int rowsPerPage() {
        return 5;
    }

    public VBox createPage(int pageIndex) {
        int lastIndex = 0;
        int displace = data.size() % rowsPerPage();
        if (displace > 0) {
            lastIndex = data.size() / rowsPerPage();
        } else {
            lastIndex = data.size() / rowsPerPage() - 1;

        }

        VBox box = new VBox(5);
        int page = pageIndex * itemsPerPage();

        for (int i = page; i < page + itemsPerPage(); i++) {
            TableView<Person> table = new TableView<Person>();
            TableColumn numCol = new TableColumn("ID");
            numCol.setCellValueFactory(
                    new PropertyValueFactory<Person, String>("num"));

            numCol.setMinWidth(20);

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


            firstNameCol.setMinWidth(160);

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

            lastNameCol.setMinWidth(160);

            table.getColumns().addAll(numCol, firstNameCol, lastNameCol);
            if (lastIndex == pageIndex) {
                table.setItems(FXCollections.observableArrayList(data.subList(pageIndex * rowsPerPage(), pageIndex * rowsPerPage() + displace)));
            } else {
                table.setItems(FXCollections.observableArrayList(data.subList(pageIndex * rowsPerPage(), pageIndex * rowsPerPage() + rowsPerPage())));
            }


            box.getChildren().add(table);
        }
        return box;
    }

    @Override
    public void start(final Stage stage) throws Exception {

        pagination = new Pagination((data.size() / rowsPerPage() + 1), 0);
        //   pagination = new Pagination(20 , 0);
        pagination.setStyle("-fx-border-color:red;");
        pagination.setPageFactory(new Callback<Integer, Node>() {
            @Override
            public Node call(Integer pageIndex) {
                if (pageIndex > data.size() / rowsPerPage() + 1) {
                    return null;
                } else {
                    return createPage(pageIndex);
                }
            }
        });

        AnchorPane anchor = new AnchorPane();
        AnchorPane.setTopAnchor(pagination, 10.0);
        AnchorPane.setRightAnchor(pagination, 10.0);
        AnchorPane.setBottomAnchor(pagination, 10.0);
        AnchorPane.setLeftAnchor(pagination, 10.0);
        anchor.getChildren().addAll(pagination);
        Scene scene = new Scene(anchor, 400, 250);
        stage.setScene(scene);
        stage.setTitle("Table pager");
        stage.show();
    }

    public static class Person {

        private final SimpleStringProperty num;
        private final SimpleStringProperty firstName;
        private final SimpleStringProperty lastName;

        private Person(String id, String fName, String lName) {
            this.firstName = new SimpleStringProperty(fName);
            this.lastName = new SimpleStringProperty(lName);
            this.num = new SimpleStringProperty(id);
        }

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

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

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

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

        public String getNum() {
            return num.get();
        }

        public void setNum(String id) {
            num.set(id);
        }
    }
}   

示例程序输出：

---

此外，第三方lgpl license PaginatedTableView为TableView提供了高级功能（包括分页）。

Answer 3

在测试此线程上生成的分页代码时，我发现了一个小问题。当数据的大小==到一个页面中设置的行数时，就会出现混乱（页面内）。在这种情况下，会创建一个附加（空白）页面，并且数据拒绝显示在任何页面上。我相信以下片段应解决该问题（如果其他人遇到与我相同的问题）。这个片段应该在声明分页变量之前出现。

int numOfPages = 1;
if (data.size() % rowsPerPage == 0) {
  numOfPages = data.size() / rowsPerPage;
} else if (data.size() > rowsPerPage) {
  numOfPages = data.size() / rowsPerPage + 1;
}
Pagination pagination = new Pagination((numOfPages), 0);
pagination.setPageFactory(this::createPage);

希望它有所帮助！