The right thing to d ois to pass the name of the response handler function
to be called as the parameter to the send function:query.send(myHandler);
and not query.send(null).
I failed to understand why you initially called it with null, is this just a
mistake, or is there any reason for this?
VizGuy
On Tue, Nov 18, 2008 at 2:40 PM, bgoetzmann <[EMAIL PROTECTED]>wrote:
>
> Finally it works, but with an other way!
>
> Instead to use query and call:
>
> query.send(null);
>
> I can use a Grails tag that permits to call an action via AJAX (with
> the Prototype library): here the code (the tag is uses in its function
> form):
>
> function initialize() {
> ${remoteFunction(action: 'data', onSuccess: 'fOnSuccess(e);')}
> }
>
> If the AJAX call succeeded, the fOnSuccess JavaScript is called:
>
> function fOnSuccess(e) {
> var response = e.responseText.evalJSON();
> // TODO : Tester response.status
> var dt = new google.visualization.DataTable(response.table,
> response.version);
> var chart = new google.visualization.PieChart(document.getElementById
> ('chart_div'));
> chart.draw(dt, {width: 400, height: 240, is3D: true});
> }
>
> I'm very happy to see how Google visualization can be mixed with
> Grails!
>
> I will certainly post a new article on this suject on my web site
> http://www.odelia-technologies.com.
>
>
> Cheers,
>
> Bertrand.
>
>
> On 18 nov, 10:12, bgoetzmann <[EMAIL PROTECTED]> wrote:
> > I do a mistake in my last post! The server part send the string:
> >
> > myHandler({"version":"0.5","reqId":"1","status":"ok","table":{"cols":
> > [... )
> >
> > And when, in the client part (JavaScript in the Interner browse) calls
> > my initialize function with the following code:
> >
> > var query = new google.visualization.Query('http://localhost:8080/
> > grailsbox/visualization/data?responseHandler=myHandler');
> > query.send(null);
> >
> > my myHandler JavaScript function is well called and the graph is well
> > displayed on the page!
> >
> > To repeat the problem I got:
> >
> > But I remark that a JavaScript error is generated after 30 seconds. I
> > understood that it's because I
> > use null in the query.send: the API tries to call an handler.
> > If I use an handler: query.send(myHandler1); with myHandler1 defined
> > like this
> >
> > function myHandler1(response) {
> > if (response.isError()) {
> > alert('Error in query: ' + response.getMessage() + ' ' +
> > response.getDetailedMessage());
> > return;
> > }
> >
> > }
> >
> > I see an error message telling "Request timed out".
> >
> > What I missed? The documentation seems to say to use the Query's get
> > method, but it is not defined.
> >
> > Thank you for any help!
> >
> > Cheers,
> >
> > Bertrandhttp://www.odelia-technologies.com/
> >
> > On 17 nov, 18:21, bgoetzmann <[EMAIL PROTECTED]> wrote:
> >
> >
> >
> > > Hello,
> >
> > > I've implemented a custom data source using the powerful Grails
> > > framework; here how I use this source in the HTML page:
> >
> > > ...
> > > google.setOnLoadCallback(initialize);
> > > function initialize() {
> > > var query = new google.visualization.Query('http://localhost:8080/
> > > grailsbox/visualization/data?responseHandler=myHandler');
> > > query.send(null);}
> >
> > > function myHandler(response) {
> > > // Tester response.status
> > > var dt = new google.visualization.DataTable(response.table,
> > > response.version);
> > > var chart = new google.visualization.PieChart
> > > (document.getElementById('chart_div'));
> > > chart.draw(dt, {width: 400, height: 240, is3D: true});}
> >
> > > ...
> >
> > > The URL is used to fetch JSON data (using a Grails controller action):
> >
> > > {"version":"0.5","reqId":"1","status":"ok","table":{"cols":[...
> >
> > > All is OK: the graph is displayed! But I remark that a JavaScript
> > > error is generated after 30 seconds. I understood that it's because I
> > > use null in the query.send: the API tries to call an handler.
> > > If I use an handler: query.send(myHandler1); with myHandler1 defined
> > > like this
> >
> > > function myHandler1(response) {
> > > if (response.isError()) {
> > > alert('Error in query: ' + response.getMessage() + ' ' +
> > > response.getDetailedMessage());
> > > return;
> > > }
> >
> > > }
> >
> > > I see an error message telling "Request timed out".
> >
> > > What I missed? The documentation seems to say to use the Query's get
> > > method, but it is not defined.
> >
> > > Thank you for any help!
> >
> > > Cheers,
> >
> > > Bertrandhttp://www.odelia-technologies.com/- Masquer le texte des
> messages précédents -
> >
> > - Afficher le texte des messages précédents -
> >
>
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