Re: External Javascript library in GWT (Canviz)

I think, that I forgot call:

canviz.draw();

But I still have error:

com.google.gwt.core.client.JavaScriptException: (TypeError): Cannot
read property 'canvasColor' of undefined
stack: TypeError: Cannot read property 'canvasColor' of undefined
at klass.draw (http://127.0.0.1:8889/js/canviz.js:649:36)
at unknown source
at __gwt_jsInvoke (http://127.0.0.1:8889/clan/hosted.html?clan:
70:35)
at eval at <anonymous> (http://127.0.0.1:8889/clan/hosted.html?
clan:54:12)
at XMLHttpRequest.<anonymous> (unknown source)
at unknown source
at __gwt_jsInvoke (http://127.0.0.1:8889/clan/hosted.html?clan:
70:35)
at eval at <anonymous> (http://127.0.0.1:8889/clan/hosted.html?
clan:54:12)
at XMLHttpRequest.onreadystatechange (unknown source)
type: non_object_property_load
arguments: canvasColor,
__gwt_ObjectId: 3290

On 22 zář, 14:25, vkrejcirik <vkrejci...@gmail.com> wrote:
> Note:
> If I create another HTML object with content:
>         HTML image = new HTML("<div id=\"debug_output\"></div>");
> Then there are any error. But I see anything. There isn't picture
> either log message.
>
> Do you have any idea please?
>
> On 22 zář, 09:39, vkrejcirik <vkrejci...@gmail.com> wrote:
>
>
>
> > I try to use javascript library Canviz for rendering dot file to image
> > on client side in my GWT application. I did these steps:
>
> > 1) Insert <script> elements into my html main page.
>
> >         <script type="text/javascript" src="js/prototype.js"></script>
> >         <script type="text/javascript" src="js/path.js"></script>
> >         <script type="text/javascript" src="js/canviz.js"></script>
> >         <script type="text/javascript" src="js/x11colors.js"></script>
>
> > 2) In java class, I create HTML object and set:
>
> > image1.setHTML("<div id=\"image_2\"></div>");
>
> > 3) Then I create native method:
>
> > public static native void getImage2(String dot) /*-{
>
> >           var canviz;
>
> >           canviz = new $wnd.Canviz("image_2");
> >           canviz.load(dot);
>
> >         }-*/;
>
> > When I push the button and call method getImage2, then I get this
> > error:
>
> > com.google.gwt.core.client.JavaScriptException: (TypeError): Cannot
> > set property 'innerHTML' of null
> >  stack: TypeError: Cannot set property 'innerHTML' of null
> >     at klass.load (http://127.0.0.1:8889/js/canviz.js:464:31)
> >     at unknown source
> >     at __gwt_jsInvoke (http://127.0.0.1:8889/clan/hosted.html?clan:
> > 70:35)
> >     at eval at <anonymous> (http://127.0.0.1:8889/clan/hosted.html?
> > clan:54:12)
> >     at XMLHttpRequest.<anonymous> (unknown source)
> >     at unknown source
> >     at __gwt_jsInvoke (http://127.0.0.1:8889/clan/hosted.html?clan:
> > 70:35)
> >     at eval at <anonymous> (http://127.0.0.1:8889/clan/hosted.html?
> > clan:54:12)
> >     at XMLHttpRequest.onreadystatechange (unknown source)
> >  type: non_object_property_store
> >  arguments: innerHTML,
> >  __gwt_ObjectId: 3497
> >     at
> > com.google.gwt.dev.shell.BrowserChannelServer.invokeJavascript(BrowserChann elServer.java:
> > 195)
> >     at
> > com.google.gwt.dev.shell.ModuleSpaceOOPHM.doInvoke(ModuleSpaceOOPHM.java:
> > 120)
> >     at
> > com.google.gwt.dev.shell.ModuleSpace.invokeNative(ModuleSpace.java:
> > 507)
> >     at
> > com.google.gwt.dev.shell.ModuleSpace.invokeNativeObject(ModuleSpace.java:
> > 264)
> >     at
> > com.google.gwt.dev.shell.JavaScriptHost.invokeNativeObject(JavaScriptHost.j ava:
> > 91)
> >     at com.google.gwt.core.client.impl.Impl.apply(Impl.java)
> >     at com.google.gwt.core.client.impl.Impl.entry0(Impl.java:188)
> >     at sun.reflect.GeneratedMethodAccessor12.invoke(Unknown Source)
> >     at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
> >     at java.lang.reflect.Method.invoke(Unknown Source)
> >     at
> > com.google.gwt.dev.shell.MethodAdaptor.invoke(MethodAdaptor.java:103)
> >     at
> > com.google.gwt.dev.shell.MethodDispatch.invoke(MethodDispatch.java:71)
> >     at
> > com.google.gwt.dev.shell.OophmSessionHandler.invoke(OophmSessionHandler.jav a:
> > 157)
> >     at
> > com.google.gwt.dev.shell.BrowserChannel.reactToMessages(BrowserChannel.java :
> > 1669)
> >     at
> > com.google.gwt.dev.shell.BrowserChannelServer.processConnection(BrowserChan nelServer.java:
> > 401)
> >     at
> > com.google.gwt.dev.shell.BrowserChannelServer.run(BrowserChannelServer.java :
> > 222)
> >     at java.lang.Thread.run(Unknown Source)
>
> > Could you help me please? Thanks.

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