Tuesday, April 2, 2013

Display images on JavaFX Pagination Control

Last post demonstrate a basic example of using Pagination Control of JavaFX. Now, it's modified to display images on Pagination.

Display images on JavaFX Pagination Control
Display images on JavaFX Pagination Control


package javafx_pagination;

import java.awt.image.BufferedImage;
import java.io.File;
import java.io.FilenameFilter;
import java.io.IOException;
import java.util.logging.Level;
import java.util.logging.Logger;
import javafx.application.Application;
import javafx.embed.swing.SwingFXUtils;
import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.scene.Node;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.Pagination;
import javafx.scene.image.Image;
import javafx.scene.image.ImageView;
import javafx.scene.layout.AnchorPane;
import javafx.scene.layout.StackPane;
import javafx.scene.layout.VBox;
import javafx.stage.DirectoryChooser;
import javafx.stage.Stage;
import javafx.util.Callback;
import javax.imageio.ImageIO;

/**
 * @web http://java-buddy.blogspot.com/
 */
public class JavaFX_Pagination extends Application {

    private Pagination pagination;
    File filesJpg[];

    @Override
    public void start(final Stage primaryStage) {

        Button btn = new Button();
        btn.setText("Open a New Window");
        btn.setOnAction(new EventHandler<ActionEvent>() {
            @Override
            public void handle(ActionEvent event) {
                openDirectoryChooser(primaryStage);
            }
        });

        StackPane root = new StackPane();
        root.getChildren().add(btn);

        Scene scene = new Scene(root, 300, 250);

        primaryStage.setTitle("java-buddy.blogspot.com");
        primaryStage.setScene(scene);
        primaryStage.show();
    }

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

    private void openDirectoryChooser(Stage parent) {
        DirectoryChooser directoryChooser = new DirectoryChooser();
        File selectedDirectory =
                directoryChooser.showDialog(parent);

        if (selectedDirectory != null) {
            FilenameFilter filterJpg = new FilenameFilter() {
                @Override
                public boolean accept(File dir, String name) {
                    return name.toLowerCase().endsWith(".jpg");
                }
            };

            filesJpg = selectedDirectory.listFiles(filterJpg);
            openPageWindow();
        }
    }

    private void openPageWindow() {
        int numOfPage = filesJpg.length;

        Stage pageStage = new Stage();
        pagination = new Pagination(numOfPage);
        pagination.setPageFactory(new Callback<Integer, Node>() {
            @Override
            public Node call(Integer pageIndex) {
                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().add(pagination);

        Scene scene = new Scene(anchor, 400, 300);

        pageStage.setTitle("Image View Pages");
        pageStage.setScene(scene);
        pageStage.show();
    }

    public VBox createPage(int index) {

        ImageView imageView = new ImageView();

        File file = filesJpg[index];
        try {
            BufferedImage bufferedImage = ImageIO.read(file);
            Image image = SwingFXUtils.toFXImage(bufferedImage, null);
            imageView.setImage(image);
            imageView.setFitWidth(400);
            imageView.setPreserveRatio(true);
            imageView.setSmooth(true);
            imageView.setCache(true);
        } catch (IOException ex) {
            Logger.getLogger(JavaFX_Pagination.class.getName()).log(Level.SEVERE, null, ex);
        }
        
        VBox pageBox = new VBox();
        pageBox.getChildren().add(imageView);
        return pageBox;
    }
}




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