Re: GeoChart not working in GWT application

I don't know how to fix the problem you're facing, but if I understand correctly, you're wrapping the JS API. Have you considered using any of the two already available wrappers for GWT?:

https://code.google.com/p/gwt-google-apis/wiki/VisualizationGettingStarted ("official" project from google)

https://code.google.com/p/gwt-charts/ ("unofficial" but apparently more up-to-date with the JS API)

I use the first one successfully with only a few JSNI snippets of code. I've never used the GeoChart, but both wrappers above claim to support it.

On Friday, August 30, 2013 10:07:49 AM UTC-4, Marian M. wrote:

Hi all,

I'm working at an application made with gwt.. and I just integrated some charts with GWT Visualization api from google.

Most of the charts have wrappers to implement those available in JS also in GWT.
So, I made a wrapper for GeoChart chart.. and I got an error every time I try to instantiate this chart. Rest of the charts work perfectly.

This is the error:

16:51:10.322 [ERROR] [reporting] Uncaught exception escaped

com.google.gwt.core.client.JavaScriptException: (TypeError) @com.qfp.reporting.charts.wrappers.GeoChart::createJso(Lcom/google/gwt/dom/client/Element;)([JavaScript object(3951)]): undefined is not a function

    at com.google.gwt.dev.shell.BrowserChannelServer.invokeJavascript(BrowserChannelServer.java:249)

    at com.google.gwt.dev.shell.ModuleSpaceOOPHM.doInvoke(ModuleSpaceOOPHM.java:136)

    at com.google.gwt.dev.shell.ModuleSpace.invokeNative(ModuleSpace.java:571)

    at com.google.gwt.dev.shell.ModuleSpace.invokeNativeObject(ModuleSpace.java:279)

    at com.google.gwt.dev.shell.JavaScriptHost.invokeNativeObject(JavaScriptHost.java:91)

    at com.qfp.reporting.charts.wrappers.GeoChart.createJso(GeoChart.java)

    at com.google.gwt.visualization.client.visualizations.Visualization.<init>(Visualization.java:65)

    at com.google.gwt.visualization.client.visualizations.Visualization.<init>(Visualization.java:71)

    at com.google.gwt.visualization.client.visualizations.corechart.CoreChart.<init>(CoreChart.java:69)

    at com.qfp.reporting.charts.wrappers.GeoChart.<init>(GeoChart.java:74)

    at com.qfp.reporting.client.WidgetEditor$28.run(WidgetEditor.java:711)

    at com.google.gwt.ajaxloader.client.ExceptionHelper.runProtected(ExceptionHelper.java:36)

    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)

    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)

    at java.lang.reflect.Method.invoke(Method.java:597)

    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.java:172)

    at com.google.gwt.dev.shell.BrowserChannelServer.reactToMessages(BrowserChannelServer.java:293)

    at com.google.gwt.dev.shell.BrowserChannelServer.processConnection(BrowserChannelServer.java:547)

    at com.google.gwt.dev.shell.BrowserChannelServer.run(BrowserChannelServer.java:364)

    at java.lang.Thread.run(Thread.java:662)

I've debugged the application line by line and still can't figure what's the problem. In my chart wrapper I have the method createJso() implemented as a native method. In the superclasses of my class respectively, CoreChart and Visualization, I also have the method, only difference is that in Visualization superclass the createJso method is declarated as abstract.

I really can't seem to find what's the problem. For the other charts everything works well.

This is the part of the code that generates the error. 

  public Visualization() {

    Element div = DOM.createDiv();

    -->>>    jso = createJso(div);   <<<--

    setElement(div);

    setStyleName("gwt-viz-container");

  }

  public Visualization(AbstractDataTable data, OptionsType options) {

    this();

    this.options = options;

    this.dataTable = data;

  }

Thank you,

Marian

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