OK,
I use this calls :
var query = new google.visualization.Query('http://localhost:8080/
grailsbox/visualization/data');
query.send(myHander);
where myHandler is a JS function like this:
function myHander(response) {
...
}
Here my results:
- case 1: the URL returns a correct text:
{"version":"0.5","status":"ok","table":{"cols":[{"id"...
At page load I get the JS error showed in Firebug as "invalid
label" {"version":"0.5","status":"ok","table":{"cols":[{"id"...
and the response I get in myHander is a "request timeout" after 30s
- case 2 : the URL returns the text:
google.visualization.Query.setResponse
({"version":"0.5","status":"ok","table":{"cols":[{"id"...)
At page load I don't get any JS error, and the response I get in
myHander is a "request timeout" after 30s
Cheers,
Bertrand.
On 24 nov, 14:29, VizGuy <[EMAIL PROTECTED]> wrote:
> 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/-Masquerletexte
> > 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 -- Masquer le texte des
> > > messages précédents -
>
> - Afficher le texte des messages précédents -
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