JavaFX 分页

JavaFX教程 - 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);

/*
 * Copyright (c) 2008, 2014, Oracle and/or its affiliates.
 * All rights reserved. Use is subject to license terms.
 *
 * This file is available and licensed under the following license:
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 *  - Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *  - Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the distribution.
 *  - Neither the name of Oracle nor the names of its
 *    contributors may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
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();
  }
}

上面的代码生成以下结果。

将分段文本添加到分页控件

/*
 * Copyright (c) 2008, 2014, Oracle and/or its affiliates.
 * All rights reserved. Use is subject to license terms.
 *
 * This file is available and licensed under the following license:
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 *  - Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *  - Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the distribution.
 *  - Neither the name of Oracle nor the names of its
 *    contributors may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
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();
    }
}

上面的代码生成以下结果。

添加未确定大小的内容

/*
 * Copyright (c) 2008, 2014, Oracle and/or its affiliates.
 * All rights reserved. Use is subject to license terms.
 *
 * This file is available and licensed under the following license:
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 *  - Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *  - Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the distribution.
 *  - Neither the name of Oracle nor the names of its
 *    contributors may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
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();
    }
}

上面的代码生成以下结果。