I fail to follow your description, so I will write what you should do, and
please let me know if this is still not working, and provide any details
that you can.In teh responseHandler value of the tqx parameter, you can
specify a function to be called when the response is received. You should
*not* use this option.
By not specifying anything, our default hander is called.
This is a static function that in turn calls the function that you specified
in query.send();
So, all you have to do is:
var query = new google.visualization.Query(data source url);
query.send(myHandler);
and then...:
function myHander(response) {
}
And this function will be called once the response is received.
If you get timeout, it means that there might be a problem in the data
source url.
Please try to type it in the browser's address bar, and see if you get any
response.
VizGuy
On Thu, Nov 20, 2008 at 10:23 PM, bgoetzmann <[EMAIL PROTECTED]>wrote:
>
> Hello,
>
> I tried the two methods:
>
> - by using myHandler for the responseHandler parameter in my URL
> In that case if I couldn't call query.send (with null or with another
> JS function) my myHandler function wasn't called.
> If I call query.send(anotherHandler) I was be able to able to draw the
> graph in the myHandler function; but had another call after 30 s to
> anotherHandler; and by tracing the received message; I got "request
> timeout".
> This is the reason why I tried query.send(null); in that case, all is
> well, but got a JavaScript error after 30s, because of thee null I
> suppose.
>
> In that method, must I have to call query.send? But with which
> argument?
>
> - I tried also the other method where the server part returns
> google.visualization.Query.setResponse({status:ok, ...})
> The JS function passed in the send.query(myHandler) is well called but
> after 30s, and the message I get is "request timeout"
>
> What do you think about the method I proposed (using protoype and
> AJAX) and that works? Ideally it would best to use the Google
> Visualization API, isn't it?
>
> Cheers,
>
> Bertrand.
>
> On 20 nov, 09:19, VizGuy <[EMAIL PROTECTED]> wrote:
> > I see the problem now.
> > You should not return myHandler(...), unless this name was specified in
> the
> > responseHandler parameter in the request.
> > Please see more at:
> http://code.google.com/apis/visualization/documentation/dev/implement...
> >
> > If it wasn't specified, you should return:
> > google.visualization.Query.setResponse({status:ok, ...})
> >
> > Which will in turn call your handler automatically.
> > This is a static function that gets all of the responses, and dispatches
> > them to the correct handlers (myHandler, in your case).
> >
> > VizGuy
> >
> > On Wed, Nov 19, 2008 at 10:46 AM, bgoetzmann <
> [EMAIL PROTECTED]>wrote:
> >
> >
> >
> >
> >
> > > 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/-Masquerle texte
> des
> > > > > messages précédents -
> >
> > > > > > - Afficher le texte des messages précédents -- 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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