MathJax in WebView.

I'd like to use MathJax in WebView.
It's possible to show math expression, but too slow and throws a lot of NPEs.
Also, I can't use MathJax by loadContent().
Thank you in advance.
h3. MathJaxTest.java
import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.web.WebView;
import javafx.stage.Stage;
public class MathJaxTest extends Application {
     @Override
     public void start(Stage primaryStage) throws Exception {
          WebView view = new WebView();
          // Doesn't work.
//          view.getEngine().loadContent(
//                    FileUtils.readFileToString(new File("MathTest.html")));//use Apched Commons IO Library
          // Got a lot of NPE
          view.getEngine().load("file:///path/to/MathTest.html");
          primaryStage.setScene(new Scene(view));
          primaryStage.show();
     public static void main(String[] args) {
          launch(args);
}h3. MathTest.html
<html>
<head>
<script type="text/javascript" src="http://cdn.mathjax.org/mathjax/latest/MathJax.js?config=TeX-AMS_HTML"></script>
</head>
<body>
<p>
This is a test.$a^b$
a = \sqrt{b}
</p>
</body>
</html>h3. Exceptions
java.lang.NullPointerException
     at com.sun.webpane.webkit.network.CookieManager.canonicalize(CookieManager.java:228)
     at com.sun.webpane.webkit.network.CookieManager.get(CookieManager.java:74)
     at com.sun.webpane.webkit.network.CookieManager.get(CookieManager.java:55)
     at com.sun.webpane.webkit.network.CookieJar.fwkGet(CookieJar.java:62)
     at com.sun.webpane.webkit.network.URLLoader.twkDidFinishLoading(Native Method)
     at com.sun.webpane.webkit.network.URLLoader.access$1300(URLLoader.java:40)
     at com.sun.webpane.webkit.network.URLLoader$6.run(URLLoader.java:638)
     at com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
     at com.sun.glass.ui.win.WinApplication.access$100(WinApplication.java:29)
     at com.sun.glass.ui.win.WinApplication$2$1.run(WinApplication.java:62)
     at java.lang.Thread.run(Thread.java:722)
java.lang.NullPointerException
     at com.sun.webpane.webkit.network.CookieManager.canonicalize(CookieManager.java:228)
     at com.sun.webpane.webkit.network.CookieManager.get(CookieManager.java:74)
     at com.sun.webpane.webkit.network.CookieManager.get(CookieManager.java:55)
     at com.sun.webpane.webkit.network.CookieJar.fwkGet(CookieJar.java:62)
     at com.sun.webpane.webkit.Timer.twkFireTimerEvent(Native Method)
     at com.sun.webpane.webkit.Timer.fireTimerEvent(Timer.java:66)
     at com.sun.webpane.webkit.Timer.notifyTick(Timer.java:47)
     at javafx.scene.web.WebEngine$PulseTimer$2.pulse(WebEngine.java:773)
     at com.sun.javafx.tk.Toolkit.firePulse(Toolkit.java:357)
     at com.sun.javafx.tk.quantum.QuantumToolkit.pulse(QuantumToolkit.java:458)
     at com.sun.javafx.tk.quantum.QuantumToolkit$8.run(QuantumToolkit.java:325)
     at com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
     at com.sun.glass.ui.win.WinApplication.access$100(WinApplication.java:29)
     at com.sun.glass.ui.win.WinApplication$2$1.run(WinApplication.java:62)
     at java.lang.Thread.run(Thread.java:722)
java.lang.NullPointerException
     at com.sun.webpane.webkit.network.CookieManager.canonicalize(CookieManager.java:228)
     at com.sun.webpane.webkit.network.CookieManager.get(CookieManager.java:74)
     at com.sun.webpane.webkit.network.CookieManager.get(CookieManager.java:55)
     at com.sun.webpane.webkit.network.CookieJar.fwkGet(CookieJar.java:62)
     at com.sun.webpane.webkit.Timer.twkFireTimerEvent(Native Method)
     at com.sun.webpane.webkit.Timer.fireTimerEvent(Timer.java:66)
     at com.sun.webpane.webkit.Timer.notifyTick(Timer.java:47)
     at javafx.scene.web.WebEngine$PulseTimer$2.pulse(WebEngine.java:773)
     at com.sun.javafx.tk.Toolkit.firePulse(Toolkit.java:357)
     at com.sun.javafx.tk.quantum.QuantumToolkit.pulse(QuantumToolkit.java:458)
     at com.sun.javafx.tk.quantum.QuantumToolkit$8.run(QuantumToolkit.java:325)
     at com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
     at com.sun.glass.ui.win.WinApplication.access$100(WinApplication.java:29)
     at com.sun.glass.ui.win.WinApplication$2$1.run(WinApplication.java:62)
     at java.lang.Thread.run(Thread.java:722)
....... many NPEs

I'd like to use MathJax in WebView.I ran your test code loading from file and it worked fine for me - rendering was good and there were no null pointers.
When loading the file into a String then trying to load via loadContent - the page also rendered, but only with ascii symbols, not with correct math symbols. Again no null pointer exceptions were observed. Not sure of the reason for the difference in rendering the loadContent vs load case - perhaps due with differences on how relative paths are resolved for each case or cross domain rules or something.
A lot of the MathJax demos work and render OK for me (winXPsp3).
java.runtime.version=1.7.0_06-ea-b17
javafx.runtime.version=2.2.0-beta-b16
import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.web.WebView;
import javafx.stage.Stage;
public class MathJaxSite extends Application {
public static void main(String[] args) { launch(args); }
@Override public void start(Stage primaryStage) {
    final WebView webView = new WebView();
    webView.getEngine().load("http://www.mathjax.org/demos/");
    System.getProperties().list(System.out);
    primaryStage.setScene(new Scene(webView));
    primaryStage.show();
}Some MathML expressions end up with boxes instead of symbols (probably because of missing or JavaFX incompatible fonts - though it could be another issue).
However MathJax doesn't need to use MathML, and has rendering modes using svg, and html/css with either custom loaded fonts or some kind of image library.
When I access the MathJax website, I also do not get the CookieManager exceptions.
When I load up the html/css demo from the MathJax website, it shows up a message that the custom font loading didn't work, and it falls back to the image based rendering - which still looks fine to me.
There is some delay in some of the samples as it loads up and parses all of the JavaScript, attempts to load the Webfonts, works out it can't and then falls back. During the delay the math symbols are shown in ascii format in a gray text which is pretty incomprehensible, but once MathJax has worked out what it needs to do, it converts the gray text to properly rendered symbols.
Don't know if the font load failure is due to a jira like this or not because I didn't check the MathJax implementaiton in detail: http://javafx-jira.kenai.com/browse/RT-20169 "CSS add support for CSS3 @font-face" or this http://javafx-jira.kenai.com/browse/RT-17428 "WebView-component doesn't seem to render CSS @font-face declarations" (the later was fixed on the 3.0 - Lombard branch for which I don't think there is a public preview yet).
I also note that the font handling info in the MathJax installation document discusses cross domain loading issues in certain browsers like Firefox and IE - so the font loading in WebView may also be similarly affected by cross domain loading issues - not sure:
http://www.mathjax.org/docs/2.0/installation.html
You could also create a jira for the MathJax font loading to get that checked to make sure WebView can handle that natively for the MathJax specific case: http://javafx-jira.kenai.com.

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{code}
Edited by: user10787071 on Oct 8, 2011 9:52 PM
Edited by: user10787071 on Oct 8, 2011 9:53 PM
Edited by: user10787071 on Oct 8, 2011 9:55 PM

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Tree in Visual Composer WebView

Hi All,
Is it possible to create a tree in VC Webview? I know this can be done in VC in NWDS. However, I believe this is not possible in the webview since I have not seen any integration with webdynpro components in webview. I am forced to use webview since I have to work on some BI data sources.
Thanks and regards,
Ritesh

Hi Kirun,
Thanks for your reply.
I am using the Webview of Visual composer and not using the integrated feature of VC in NWDS. I am using the webview since some of the BI data sources that I am using is available only in webview and not in the NWDS integrated VC.
In Webview, I do not see any feature wherein I can build a tree. Can you please help?
Thanks and regards,
Ritesh

MathJax in WebView.

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