Ah, this is a problem with our implementation with IE, and it should be fixed in the very near future. Sorry for that, VizGuy
On Tue, Jan 13, 2009 at 6:20 PM, Tom Hjellming <[email protected] > wrote: > Thanks VizGuy. That sounds simple enough and it works for a while -- but > after calling draw() a few times, the gauges disappear. > > Here is my sample app using the 5 gauges like those from the Showcase. Am > I doing something wrong? or is there a bug in the Viz library? > > package com.company.gaugetest.client; > > import com.google.gwt.core.client.EntryPoint; > import com.google.gwt.core.client.GWT; > import com.google.gwt.user.client.Random; > import com.google.gwt.user.client.Timer; > import com.google.gwt.user.client.ui.RootPanel; > import com.google.gwt.visualization.client.AjaxLoader; > import com.google.gwt.visualization.client.DataTable; > import com.google.gwt.visualization.client.AbstractDataTable.ColumnType; > import com.google.gwt.visualization.client.visualizations.Gauge; > > /** > * Entry point classes define <code>onModuleLoad()</code>. > */ > public class GaugeTest implements EntryPoint > { > private Gauge gauge; > private Gauge.Options options; > > public void onModuleLoad() > { > Runnable onLoadCallback = new Runnable() { > > public void run() > { > RootPanel rootPanel = RootPanel.get(); > > options = Gauge.Options.create(); > options.setWidth(400); > options.setHeight(240); > options.setGaugeRange(0, 24); > options.setGreenRange(0, 6); > options.setYellowRange(6,12); > options.setRedRange(12, 24); > > final DataTable data = getData(); > > Timer timer = new Timer() { > > public void run() > { > // Randomly pick one gauge to update with a random > number. > int index = Random.nextInt(4); > int num = Random.nextInt(24); > data.setValue(index, 1, num); > GWT.log("Next for " + index + " is " + num, null); > > gauge.draw(data, options); > } > > }; > > gauge = new Gauge(data, options); > rootPanel.add(gauge); > > timer.scheduleRepeating(2000); > } > > }; > > AjaxLoader.loadVisualizationApi(onLoadCallback, Gauge.PACKAGE); > } > > private DataTable getData() > { > final DataTable data = DataTable.create(); > data.addColumn(ColumnType.STRING, "Task"); > data.addColumn(ColumnType.NUMBER, "Hours per Day"); > > data.addRows(5); > data.setValue(0, 0, "Work"); > data.setValue(0, 1, 11); > data.setValue(1, 0, "Eat"); > data.setValue(1, 1, 2); > data.setValue(2, 0, "Commute"); > data.setValue(2, 1, 2); > data.setValue(3, 0, "Watch TV"); > data.setValue(3, 1, 2); > data.setValue(4, 0, "Sleep"); > data.setValue(4, 1, 7); > > return data; > > } > } > > VizGuy wrote: > > This can be done easily. > > All you have to do is to call the draw() function of the same chart again, > with a new data. This will cause the needle to move to the new place. > > Notice that if you are using a query to get the data from a remote data > source, you can set the query to have a refresh interval and so it will > automatically send for a new data and if it was changed, the function that > you originally set to be called when the query is back, we be called again. > > Regards, > VizGuy > > > On Tue, Jan 13, 2009 at 9:34 AM, TomHj <[email protected]>wrote: > >> >> I'm investigating whether I can use the Google Visualization API with >> the GWT wrapper within my GWT app to display a dashboard of gauges. >> The gauges would display things like memory utilization, disk usage, >> etc. I need to be able to update the gauges on the fly (so the >> needles are repositioned without redrawing the entire gauge). >> >> I can't tell if the Gauge visualization supports that updating to >> reflect new data. If so, how is it done? >> >> thanks, >> Tom >> >> >> > > > > > > > --~--~---------~--~----~------------~-------~--~----~ 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 -~----------~----~----~----~------~----~------~--~---
