Does your button reload the libraries or just resends the query ?
On Fri, Jul 9, 2010 at 4:35 AM, kawanka <[email protected]> wrote: > Hello, > > I am using GWT and its visualization API wrapper. I am using GWT > 2.1.0.M2 and gwt-visualization-1.1.0. Things work perfectly when I > load my application for the first time, in the browser and click a > button to load the visualization API and display it in the GUI. > However it only works from the initial page load. If I navigate a bit > and click the button again to re-load the data, I get a timeout > error. > > If I use a google datasource like : > > > http://spreadsheets.google.com/tq?key=pWiorx-0l9mwIuwX5CbEALA&range=A1:B12&gid=0&headers=-1 > > My app can reload the content and never times out. > > > > Has anyone ever seen this before? > > > I have a servlet which returns a string: > > Here is the servlet code : > > > protected void doGet(HttpServletRequest request, HttpServletResponse > response) throws ServletException, IOException { > > response.setContentType("application/json"); > > > response.getWriter().write("google.visualization.Query.setResponse({version:'0.6',reqId:'0',status:'ok',sig:'106459472',table: > {cols:[{id:'A',label:'Source',type:'string',pattern:''}, > {id:'B',label:'Percent',type:'number',pattern:'#0.01%'}],rows:[{c: > [{v:'This'},{v:0.37,f:'37.00%'}]},{c:[{v:'That'},{v:0.25,f:'25.00%'}]}, > {c:[{v:'The Other'},{v:0.23,f:'23.00%'}]},{c:[{v:'Thing'},{v: > 0.06,f:'6.00%'}]},{c:[{v:'Biomass'},{v:0.04,f:'4.00%'}]},{c: > [{v:'Hydro'},{v:0.03,f:'3.00%'}]},{c:[{v:'Solar Heat'},{v: > 0.005,f:'0.50%'}]},{c:[{v:'Wind'},{v:0.003,f:'0.30%'}]},{c: > [{v:'Geothermal'},{v:0.002,f:'0.20%'}]},{c:[{v:'Biofuels'},{v: > 0.002,f:'0.20%'}]},{c:[{v:'Solar photovoltaic'},{v: > 4.0E-4,f:'0.04%'}]}]}});"); > > } > > I have another project: An eclipse GWT project which uses the > visualization API wrapper to fetch this data source. The > VerticalPanel's constructor looks like this : > > > public AlertsListPanel() { > initWidget(uiBinder.createAndBindUi(this)); > String dataUrl = "http://localhost:8080/TestServlet/Test";; > OnLoadAPIForTable onLoadCallback = new OnLoadAPIForTable(dataUrl); > VisualizationUtils.loadVisualizationApi(onLoadCallback, > Table.PACKAGE); > } > > > > The callback class looks like this : > > > private class OnLoadAPIForTable implements Runnable{ > private StatusPopUp popUp; > private String url; > > public OnLoadAPIForTable (String url){ > this.popUp = new StatusPopUp("Loading"); > this.url = url; > } > > @Override > public void run(){ > Query query = Query.create(url); > > // Send the query. > query.send(new Callback() { > public void onResponse(QueryResponse response) { > if (response.isError()) { > Window.alert(response.getMessage()); > popUp.clean(); > } else { > // Get the data from the QueryResponse. > DataTable data = response.getDataTable(); > > // Create the Options object. > Options options = createTableOptions(); > > // Create a PieChart and add it to a panel. > Table tbl = new Table(data, options); > tbl.addSelectHandler(createSelectHandler(tbl)); > dataVisualization.add(tbl); > popUp.clean(); > } > } > }); > } > > private Table.Options createTableOptions() { > Table.Options options = Table.Options.create(); > options.setAlternatingRowStyle(true); > options.setHeight("400px"); > options.setWidth("800"); > options.setPage(Table.Options.Policy.ENABLE); > options.setPageSize(10); > return options; > } > > private SelectHandler createSelectHandler(final Table chart) > { > return new SelectHandler() { > @Override > public void onSelect(SelectEvent event) { > String message = ""; > > // May be multiple selections. > JsArray<Selection> selections = > chart.getSelections(); > > for (int i = 0; i < selections.length(); i++) { > // add a new line for each selection > message += i == 0 ? "" : "\n"; > > Selection selection = selections.get(i); > > if (selection.isCell()) { > // isCell() returns true if a cell has been > selected. > > // getRow() returns the row number of the > selected cell. > int row = selection.getRow(); > // getColumn() returns the column number of the > selected > cell. > int column = selection.getColumn(); > message += "cell " + row + ":" + column + " > selected"; > } else if (selection.isRow()) { > // isRow() returns true if an entire row has > been > selected. > > // getRow() returns the row number of the > selected row. > int row = selection.getRow(); > message += "row " + row + " selected"; > } else { > // unreachable > message += "Pie chart selections should be > either row > selections or cell selections."; > message += " Other visualizations support > column > selections as well."; > } > } > > Window.alert(message); > } > }; > } > } > > Thanks in advance for any suggestions on helping me understand this > timeout issue. > > R. > > -- > 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]<google-visualization-api%[email protected]> > . > For more options, visit this group at > http://groups.google.com/group/google-visualization-api?hl=en. > > -- You received this message because you are subscribed to the Google Groups "Google Visualization API" group. 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