First of all, there was an issue a lot of SmartGWT users ran into w/r/t visualization I wanted you to be aware of.
http://code.google.com/p/gwt-google-apis/issues/detail?id=425 The message you're getting doesn't sound specific to the visualization API, it sounds more like a general GWT or smart GWT problem. As a general debugging tip, I'd recommend setting break points in dev mode and making sure you aren't moving any widgets from one parent to another and you aren't accidentally getting a callback more than once. On Sun, May 8, 2011 at 9:44 PM, Rob <[email protected]> wrote: > Hi > > I would like to add visualization support via the Google Visualization > API (1.1) to an existing GWT (2.1.1) and smartGWT (2.4) application. > > I followed the approach described in this post -> > http://forums.smartclient.com/showpost.php?p=37754&postcount=2 and the > Visualization Getting Started guide-> > http://code.google.com/p/gwt-google-apis/wiki/VisualizationGettingStarted. > > And, then found this post -> > http://groups.google.com/group/google-visualization-api/browse_thread/thread/ff89e49ecf52fd4/69b7bfd3d4042526?lnk=gst&q=smartGWT#69b7bfd3d4042526 > in the Google Visualization API discussion group. > > For example: > > -> > > public void loadVisualizationApi() { > > Log.debug("loadVisualizationApi()"); > > // Create a callback to be called when the visualization API > // has been loaded. > Runnable onLoadCallback = new Runnable() { > public void run() { > > Log.debug("onLoadCallback()"); > > // Create a pie chart visualization. > pie = new PieChart(createTable(), createOptions()); > pie.setWidth("80%"); > > Canvas canvas = new Canvas(); > canvas.setID("sys_pie_canvas"); > canvas.setWidth100(); > canvas.setHeight("50%"); > canvas.addChild(pie); > > panel.addMember(canvas, 0); > > Log.debug("panel.addMember(canvas, 0)"); > } > }; > > // Load the visualization api, passing the onLoadCallback > // to be called when loading is complete. > VisualizationUtils.loadVisualizationApi("1.1", onLoadCallback, > PieChart.PACKAGE); > } > > // The code for createTable() and createOptions()) is as per > // the post mentioned above. > > -> > > However, this results in the following error: > java.lang.AssertionError: A widget that has an existing parent widget > may not be added to the detach list at > com.google.gwt.user.client.ui.RootPanel.detachOnWi > ndowClose(RootPanel.java:136) when using GWT (2.1.1), smartGWT LGPL > (2.5 nightly build) and Google Visualization API (1.1). > > Note: I also tested the code using smartGWT (2.4) and received the > following error: (NativeMethodAccessorImpl.java:-2) 2011-05-09 > 10:26:21,613 [FATAL] Uncaught JavaScript exception [Script error.] > in , line 0 > > If I comment out the call to "panel.addMember(pie)" and replace it > with "RootPanel.get().add(pie)" no exception is thrown and the "chart" > is rendered correctly (you can see it momentarily if you re-size the > browser window) but as a child of the root panel. Which means it is > hidden by the application's other nested layout containers (e.g. > North, West, East and South). > > I would like to be able to place the "chart" in a nested layout > container if possible? > > The stack trace: > > -> > > 16:13:50.134 [ERROR] [serendipity] (ExceptionHelper.java:38) > 2011-05-08 16:13:50,134 [FATAL] Uncaught Exception: > > java.lang.AssertionError: A widget that has an existing parent widget > may not be added to the detach list > at > com.google.gwt.user.client.ui.RootPanel.detachOnWindowClose(RootPanel.java: > 136) > at com.google.gwt.user.client.ui.RootPanel.get(RootPanel.java:211) > at > com.smartgwt.client.widgets.WidgetCanvas.onDraw(WidgetCanvas.java:39) > at com.smartgwt.client.widgets.BaseWidget.rendered(BaseWidget.java: > 242) > at sun.reflect.GeneratedMethodAccessor40.invoke(Unknown Source) > 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: > 157) > at > com.google.gwt.dev.shell.BrowserChannelServer.reactToMessagesWhileWaitingForReturn(BrowserChannelServer.java: > 326) > at > com.google.gwt.dev.shell.BrowserChannelServer.invokeJavascript(BrowserChannelServer.java: > 207) > at > com.google.gwt.dev.shell.ModuleSpaceOOPHM.doInvoke(ModuleSpaceOOPHM.java: > 126) > at > com.google.gwt.dev.shell.ModuleSpace.invokeNative(ModuleSpace.java: > 561) > at > com.google.gwt.dev.shell.ModuleSpace.invokeNativeVoid(ModuleSpace.java: > 289) > at > com.google.gwt.dev.shell.JavaScriptHost.invokeNativeVoid(JavaScriptHost.java: > 107) > at > com.smartgwt.client.widgets.layout.Layout.addMemberPostCreate(Layout.java) > at com.smartgwt.client.widgets.layout.Layout.addMember(Layout.java: > 1089) > at com.smartgwt.client.widgets.layout.Layout.addMember(Layout.java: > 1076) > at au.com.uptick.serendipity.client.sales.view.DashboardsView > $1.run(DashboardsView.java:76) > 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: > 157) > at > com.google.gwt.dev.shell.BrowserChannelServer.reactToMessages(BrowserChannelServer.java: > 281) > at > com.google.gwt.dev.shell.BrowserChannelServer.processConnection(BrowserChannelServer.java: > 531) > at > com.google.gwt.dev.shell.BrowserChannelServer.run(BrowserChannelServer.java: > 352) > at java.lang.Thread.run(Thread.java:619) > > -> > > Cheers > Rob > > -- > You received this message because you are subscribed to the Google Groups > "Google Visualization API" group. > To post to this group, send email to > [email protected]. > To unsubscribe from this group, send email to > [email protected]. > For more options, visit this group at > http://groups.google.com/group/google-visualization-api?hl=en. > > -- Eric Z. Ayers Google Web Toolkit, Atlanta, GA USA -- You received this message because you are subscribed to the Google Groups "Google Visualization API" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/google-visualization-api?hl=en.
