JavaFX 2.0 WebView / webengine renders web pages to images

I'm looking for a way to load the page and save the rendering as an image, just as you did with cutycapt (QT WebKit exe)

At present and without JavaFX, I call an external process to render from Java to a file instead of loading the file into an imagebuffer... Which is neither very optimized nor practical, or even less cross platform

Using javafx2, I tried WebView & webengine:

public class WebComponentTrial extends Application {
    private Scene scene;

    @Override
    public void start(final Stage primaryStage) throws Exception {
        primaryStage.setTitle("Web View");
        final Browser browser = new Browser();
        scene = new Scene(browser,1180,800,Color.web("#666970"));
        primaryStage.setScene(scene);
        scene.getStylesheets().add("webviewsample/BrowserToolbar.css");
        primaryStage.show();
    }

    public static void main(final String[] args) {
        launch(args);
    }
}
class Browser extends Region {
    static { // use system proxy settings when standalone application
    // System.setProperty("java.net.useSystemProxies","true");
    }

    final WebView browser = new WebView();
    final WebEngine webEngine = browser.getEngine();

    public Browser() {
        getStyleClass().add("browser");
        webEngine.load("http://www.google.com/");
        getChildren().add(browser);
    }

    @Override
    protected void layoutChildren() {
        final double w = getWidth();
        final double h = getHeight();
        layoutInArea(browser,w,h,HPos.CENTER,VPos.CENTER);
    }

    @Override
    protected double computePrefWidth(final double height) {
        return 800;
    }

    @Override
    protected double computePrefHeight(final double width) {
        return 600;
    }
}

There is an obsolete method: rendertoimage in scene (see the link below), which will do something close, and I can use it, but it has been deprecated... Its deprecation in JavaFX seems to mean that there is no Javadoc advertising replacement method, because I can't access the code, and I can't see how it is done

There are several websites here. I found some information, but nothing can present the web page to the image:

http://tornorbye.blogspot.com/2010/02/how-to-render-javafx-node-into-image.html

Canvasimage and saveimage (canvasimage, FC. Getselectedfile()) from this one:

http://javafx.com/samples/EffectsPlayground/src/Main.fx.html

other:

http://download.oracle.com/javafx/2.0/webview/jfxpub-webview.htm
http://download.oracle.com/javafx/2.0/get_started/jfxpub-get_started.htm

  

  
 
 
 

  
   
 
   Maps in JavaFX 2.0 

  
 
 
 

Solution

I do this by launching JavaFX WebView on swing JFrame and jfxpanel Then, when the webengine status is succeeded, I use the paint () method on jfxpanel

You can follow this tutorial to create WebView: integrating JavaFX into swing applications

The following code demonstrates how to capture a rendered screen from jfxpanel

public static void main(String args[]) {
jFrame = new JFrame("Demo Browser");
jfxPanel = new JFXPanel();
jFrame.add(jfxPanel);
jFrame.setVisible(true);
jFrame.setDefaultCloSEOperation(JFrame.EXIT_ON_CLOSE);

SwingUtilities.invokelater(new Runnable() {
    @Override
    public void run() {
        Platform.runLater(new Runnable() {
            @Override
            public void run() {
                browser = new FXBrowser();
                jfxPanel.setScene(browser.getScene());
                jFrame.setSize((int)browser.getWebView().getWidth(),(int)browser.getWebView().getHeight());

                browser.getWebEngine().getLoadWorker().stateproperty().addListener(
                        new changelistener() {
                            @Override
                            public void changed(ObservableValue observable,Object oldValue,Object newValue) {
                                State oldState = (State)oldValue;
                                State newState = (State)newValue;
                                if (State.SUCCEEDED == newValue) {
                                    captureView();
                                }
                            }
                        });
            }
        });
    }
});}


private static void captureView() {
BufferedImage bi = new BufferedImage(jfxPanel.getWidth(),jfxPanel.getHeight(),BufferedImage.TYPE_INT_ARGB);
Graphics graphics = bi.createGraphics();
jfxPanel.paint(graphics);
try {
    ImageIO.write(bi,"PNG",new File("demo.png"));
} catch (IOException e) {
    e.printStackTrace();
}
graphics.dispose();
bi.flush();}