can I take a look at your createguagedata ? manythanks On Jan 9, 5:34 pm, gcstang <[email protected]> wrote: > I don't use a barchart but one of the others visualizations with GWT, > maybe this will help. > > Create a Timer (com.google.gwt.user.client.Timer), use this to update > your barchart after the initial load. > > On start of your Composite, call a method that does the following > > 1. Call a method that retrieves your data and initializes your > barchart (setServices in my code) > 2. Also create a timer that will update the data for your barchart > t = new Timer() { > public void run() { > retrieveGaugeData(); > if(gauge != null) { > gauge.draw(createGaugeData(), createGaugeOptions()); > } > } > }; > t.scheduleRepeating(5000); > > Method setServices (retrieves data initially and initializes my > visualization) > 1. Retrieves your data, I use an RPC call to pull this data from the > server which in turn pulls it from MySQL and returns it > 2. Create your barchart (in my case a Gauge), note I'm also using > SmartGWT so adding it to the canvas may be a little different. > Runnable onLoadCallback = new Runnable() { > public void run() { > gauge = new Gauge(createGaugeData(), createGaugeOptions()); > gauge.setWidth("80%"); > Canvas c = new Canvas(); > c.setID("sys_gauge_canvas"); > c.setWidth100(); > c.setHeight("30%"); > c.addChild(gauge); > addMember(c, 0); > } > }; > > VisualizationUtils.loadVisualizationApi("1.1", onLoadCallback, > Gauge.PACKAGE); > > On Dec 27 2010, 2:27 am, Atif Mir <[email protected]> wrote: > > > > > > > > > Hi All, > > > Could some one please post some example code as how a bar chart could be > > created from datasource coming from MYSQL db or MSSQL db ? > > > Thanks
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