JavaFX 分页

分页控件用于浏览多个页面。 我们典型地使用对网页的分页控制，例如博客。 在博客页面的底部，我们可以看到一个矩形区域，作为一个数字列表来指示页面索引，以及一个下一个/上一个按钮来链接到下一个/上一个页面。

创建分页控件

分页控件由页面内容和页面导航区域组成。
创建具有不确定页计数和当前页索引等于零的分页控件

Pagination pagination1 = new Pagination();

要创建一个5页的分页控件，当前页索引等于零

Pagination pagination2 = new Pagination(5);

要创建一个5页的分页控件，当前所选索引等于2

Pagination pagination3 = new Pagination(5, 2);

import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.control.Pagination;
import javafx.scene.control.Hyperlink;
import javafx.scene.control.Label;
import javafx.scene.layout.AnchorPane;
import javafx.scene.layout.VBox;
import javafx.stage.Stage;
public class Main extends Application {
    private Pagination pagination;
    public static void main(String[] args) throws Exception {
        launch(args);
    }
    public int itemsPerPage() {
        return 8;
    }
    public VBox createPage(int pageIndex) {
        VBox box = new VBox(5);
        int page = pageIndex * itemsPerPage();
        for (int i = page; i < page + itemsPerPage(); i++) {
            VBox element = new VBox();
            Hyperlink link = new Hyperlink("Item " + (i + 1));
            link.setVisited(true);
            Label text = new Label("Search results\nfor " + link.getText());
            element.getChildren().addAll(link, text);
            box.getChildren().add(element);
        }
        return box;
    }
    @Override
    public void start(final Stage stage) throws Exception {
        pagination = new Pagination(28, 0);
        pagination.setStyle("-fx-border-color:red;");
        pagination.setPageFactory((Integer pageIndex) -> 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);
        stage.setScene(scene);
        stage.setTitle("PaginationSample");
        stage.show();
    }
}

将分段文本添加到分页控件

import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.control.Pagination;
import javafx.scene.control.TextArea;
import javafx.scene.layout.AnchorPane;
import javafx.scene.layout.VBox;
import javafx.stage.Stage;
public class Main extends Application {
    private Pagination pagination;
    final String[] textPages = new String[]{
        "this is a test 1",
        "this is a test 2",
        "this is a test 3",
        "this is a test 4",
        "this is a test 5",
        "this is a test 6",
        "this is a test 7",
        "this is a test 8",
        "this is a test 8",
    };
    public static void main(String[] args) throws Exception {
        launch(args);
    }
    public int itemsPerPage() {
        return 1;
    }
    public VBox createPage(int pageIndex) {
        VBox box = new VBox(5);
        int page = pageIndex * itemsPerPage();
        for (int i = page; i < page + itemsPerPage(); i++) {
            TextArea text = new TextArea(textPages[i]);
            text.setWrapText(true);
            box.getChildren().add(text);
        }
        return box;
    }
    @Override
    public void start(final Stage stage) throws Exception {
        pagination = new Pagination(28, 0);
        pagination.setPageFactory((Integer pageIndex) -> {
            if (pageIndex >= textPages.length) {
                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("PaginationSample");
        stage.show();
    }
}

添加未确定大小的内容

import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.control.Pagination;
import javafx.scene.control.Label;
import javafx.scene.layout.AnchorPane;
import javafx.scene.layout.VBox;
import javafx.scene.text.Font;
import javafx.stage.Stage;
public class Main extends Application {
    private Pagination pagination;
    String[] fonts = new String[]{};
    public static void main(String[] args) throws Exception {
        launch(args);
    }
    public int itemsPerPage() {
        return 15;
    }
    public VBox createPage(int pageIndex) {        
        VBox box = new VBox(5);
        int page = pageIndex * itemsPerPage();
        for (int i = page; i < page + itemsPerPage(); i++) {
            Label font = new Label(fonts[i]);
            box.getChildren().add(font);
        }
        return box;
    }
    @Override
    public void start(final Stage stage) throws Exception {
        fonts = Font.getFamilies().toArray(fonts);
        pagination = new Pagination(fonts.length/itemsPerPage(), 0);
        pagination.setPageFactory((Integer pageIndex) -> 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, 450);
        stage.setScene(scene);
        stage.show();
    }
}