This is because I see that when send(null) is executed, my myHandler
JavaScript function is automatically executed!
This function is defined in my web page, and the URL I use returns the
string:
myHandler({"version":"0.5","reqId":"1","status":"ok","table":{"cols":
[... )
So my initial question was: is it normal?
Bertrand ;-)
On 18 nov, 22:04, VizGuy <[EMAIL PROTECTED]> wrote:
> 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 -- Masquer le texte des
> > > messages précédents -
>
> - Afficher le texte des messages précédents -
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