Export Stage into PDF - javafx

Question

IS there any way to export Stage or some other component like BorderPane with visual components into PDF file? I want when I click a button to export the component into PDF file? IS there any example?

Answer 1

You can use PDFBox libreries in your javafx project . this code take a snapshot from a node , make an image file , then create a pdf file and insert the image in the pdf file . you need this .jar http://www-us.apache.org/dist/pdfbox/2.0.8/pdfbox-app-2.0.8.jar . with pdfbox you can pass strings of javafx to text in pdf , you can do many things ( change font , size .... )
import java.io.File;
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.Scene;
import javafx.scene.SnapshotParameters;
import javafx.scene.chart.BarChart;
import javafx.scene.chart.CategoryAxis;
import javafx.scene.chart.NumberAxis;
import javafx.scene.control.Button;
import javafx.scene.image.WritableImage;
import javafx.scene.layout.StackPane;
import javafx.stage.Stage;
import javax.imageio.ImageIO;
import org.apache.pdfbox.pdmodel.PDDocument;
import org.apache.pdfbox.pdmodel.PDPage;
import org.apache.pdfbox.pdmodel.PDPageContentStream;
import org.apache.pdfbox.pdmodel.graphics.image.PDImageXObject;
public class NodeToPdf extends Application {
#Override
public void start(Stage primaryStage) {
CategoryAxis xAxis = new CategoryAxis();
xAxis.setLabel("x");
NumberAxis yAxis = new NumberAxis();
yAxis.setLabel("y");
BarChart bar = new BarChart(xAxis, yAxis);
bar.setMaxSize(300, 300);
bar.setTitle("Bar node" );
bar.setTranslateY(-100);
Button btn = new Button();
btn.setTranslateY(100);
btn.setText("To Pdf'");
btn.setOnAction(new EventHandler<ActionEvent>() {
#Override
public void handle(ActionEvent event) {
WritableImage nodeshot = bar.snapshot(new SnapshotParameters(), null);
File file = new File("chart.png");
try {
ImageIO.write(SwingFXUtils.fromFXImage(nodeshot, null), "png", file);
} catch (IOException e) {
}
PDDocument doc = new PDDocument();
PDPage page = new PDPage();
PDImageXObject pdimage;
PDPageContentStream content;
try {
pdimage = PDImageXObject.createFromFile("chart.png",doc);
content = new PDPageContentStream(doc, page);
content.drawImage(pdimage, 100, 100);
content.close();
doc.addPage(page);
doc.save("pdf_file.pdf");
doc.close();
file.delete();
} catch (IOException ex) {
Logger.getLogger(NodeToPdf.class.getName()).log(Level.SEVERE, null, ex);
}
}
});
StackPane root = new StackPane();
root.getChildren().add(btn);
root.getChildren().add(bar);
Scene scene = new Scene(root, 600, 600);
primaryStage.setScene(scene);
primaryStage.show();
}
public static void main(String[] args) {
launch(args);
}
}

Answer 2

you can send a node to a printer and save it as pdf with a virtual printer
public class PrinterNodetExample extends Application {
#Override
public void start(Stage primaryStage) {
Button btn = new Button();
StackPane root = new StackPane();
root.getChildren().add(btn);
Scene scene = new Scene(root, 300, 250);
btn.setText("Say 'Hello World'");
btn.setOnAction(new EventHandler<ActionEvent>() {
#Override
public void handle(ActionEvent event) {
System.out.println("To Printer!");
PrinterJob job = PrinterJob.createPrinterJob();
if(job != null){
job.showPrintDialog(primaryStage);
job.printPage(root);
job.endJob();
}
}
});
primaryStage.setTitle("Printer");
primaryStage.setScene(scene);
primaryStage.show();
}
public static void main(String[] args) {
launch(args);
}}

Answer 3

First guess is that you could simply save the Scene root to the image and then include it to the PDF. See Node#snapshot method for details.