ok, even though the @mapped_sites.to_json works, the output of that
does not look like json. It looks like an array
example:
var sites = [["35.931341","-102.32205",381.75,288.0,"AL","AL",
557,"#7F7F7F","#FF0000",287.1,288.3,"AL<br>0 psi",0],
["35.88125039","-102.3088989",525.0,83.4,"DC","DC",
34280,"#7F7F7F","#FF0000",83.1,83.3,"DC<br>0 psi",0],
["35.88125039","-102.3226989",525.0,81.7,"DC2","DC2",
37241,"#000000","#FF0000",81.7,81.7,"DC2<br>0 psi",0],
["35.92361","-102.308768",534.75,73.7,"J1","J1",
559,"#7F7F7F","#FF0000",74.7,73.8,"J1<br>0 psi",0],
["35.92332","-102.32096",493.5,261.0,"J2","J2",560,"#7F7F7F","#FF0000",
261.0,261.0,"J2<br>0 psi",0],["35.931354","-102.31308",
397.5,80.8,"SL1","SL1",561,"#7F7F7F","#FF0000",81.3,81.9,"SL1<br>0
psi",0],["35.931186","-102.304202",390.0,165.2,"SL2","SL2",
110823130,"#7F7F7F","#FF0000",165.4,165.6,"SL2<br>0 psi",0],
["35.938729","-102.29968",397.5,89.3,"SL4","SL4",
563,"#7F7F7F","#FF0000",89.3,89.3,"SL4<br>0 psi",0],
["35.931301","-102.29965",397.5,23.7,"SL5","SL5",
564,"#7F7F7F","#FF0000",23.9,23.0,"SL5<br>0 psi",0],
["35.924694","-102.299034",333.75,95.8,"SL6","SL6",
7882,"#7F7F7F","#FF0000",95.8,95.8,"SL6<br>0 psi",0]];
and the code seems to work with it like an array. How do i get the
responseText from the server as an array?
thanks again.
sk
On Dec 13, 4:08 pm, Frederick Cheung <frederick.che...@gmail.com>
wrote:
> On 13 Dec 2011, at 19:54, skrite <sh...@skrite.net> wrote:
>
> > Jim.
>
> > You are correct, when i show typeof(sites) from when sites = <%=
> > @mapped_sites =>
> > i get object
> > when i do typeof(sites) after getting sites from the
> > url_that_returns_json
> > i get string
>
> responseText is always going to be text if I remember how prototype handles
> thing (the text will just happen to be the string representation of the json).
> If the response content-type was set correctly then response.responseJson (or
> something like that) should be populated
>
> Fred
>
>
>
>
>
>
>
> > i suppose that i am not getting returned correctly.
> > if i look at the source of @mapped_sites
> > and from the browser look at url_that_returns_json,
> > they are identical.
>
> > thanks for your help, again.
> > I have learned a lot the last couple of days :)
>
> > On Dec 12, 6:22 pm, Jim Ruther Nill <jvn...@gmail.com> wrote:
> >> On Tue, Dec 13, 2011 at 6:08 AM, skrite <sh...@skrite.net> wrote:
> >>> I am doing something similar here. The website is built on rails 2.3.9
> >>> and
> >>> uses prototype.
>
> >>> Almost all of what i need to happen does, but i get to the point where
> >>> the update happens and nothing does.
>
> >>> // add circles to map as it initializes
> >>> addCircles(sites, map, markerArray, lineArray);
>
> >>> var pe = new PeriodicalExecuter(refreshCircleMarkers.curry(markerArray,
> >>> lineArray, map), 33);
>
> >>> function refreshCircleMarkers(markerArray, lineArray, map) {
> >>> // first we remove the existing markers in place
> >>> for(i=0; i<markerArray.length; i++) {
> >>> markerArray[i].setMap(null);
> >>> }
>
> >> // and empty the array itself> markerArray = [];
>
> >>> var url = "/group/update_mapv3_circles";
> >>> new Ajax.Request(url, {
> >>> method: 'get',
> >>> onSuccess: function(response) {
> >>> var sites = response.responseText;
> >>> addCircles(sites, map, markerArray, lineArray);
> >>> }
> >>> });
>
> >> I see nothing wrong. Does the addCircles function expect a JSON
> >> object for the first param? The only reason I can think why this isn't
> >> working
> >> is a type mismatch.
>
> >>> If i do an alert(response.responseText) the alert will show up and
> >>> display the contents of the @mapped_sites.to_json ( i am using
> >>> render :json => @mapped_sites.to_json in the controller).
> >>> Please let me know if you see something i am doing wrong.
> >>> Thanks for your help on this so far Jim.
>
> >>> sk
>
> >>> On Dec 9, 11:49 pm, Jim Ruther Nill <jvn...@gmail.com> wrote:
> >>>> On Sat, Dec 10, 2011 at 3:56 AM, skrite <sh...@skrite.net> wrote:
> >>>>> I am intrigued by this solution, Jim.
> >>>>> i have a couple of questions, as it seems this is a cleaner way than
> >>>>> what I am trying to do.
> >>>>> The values that determine the circle color are in the database, and
> >>>>> can change while the page is loaded. This is why i need them to
> >>>>> update.
>
> >>>> i'll still go with my suggestion earlier. To update the colors, just
> >>> update
> >>>> the sites variable after completing the ajax request and then call
> >>>> addCircles
>
> >>>> your ajax call may look like the following (this is totally untested :D)
>
> >>>> $.ajax({
> >>>> url: your_url_here_that_returns_json_equivalent_of_@mapped_sites,
> >>>> success: function(data) {
> >>>> addCircles(data);
> >>>> }
>
> >>>> });
> >>>>> So, somehow i still need to go to the server for that. I guess i am
> >>>>> missing the part about how to get the @mapped_sites variable to the
> >>>>> controller and back again to the page to rebuild the circles.
> >>>>> Thanks for your time on this.
> >>>>> sk
>
> >>>>> On Dec 9, 9:48 am, Jim Ruther Nill <jvn...@gmail.com> wrote:
> >>>>>> On Fri, Dec 9, 2011 at 11:04 PM, skrite <sh...@skrite.net> wrote:
> >>>>>>> Hey, thanks for these links, very helpful.
> >>>>>>> -sk
>
> >>>>>>> On Dec 8, 7:49 pm, "L.Karthikeyan" <logkart...@gmail.com> wrote:
> >>>>>>>> Hi,
>
> >>>>>>>> For this you need to use rjs Ajax request. Please refer the
> >>>>>>>> following links, you will get an idea.
>
> >>>>>>>> 1.http://railscasts.com/episodes/43-ajax-with-rjs?autoplay=true,
> >>>>>>>> 2.
> >>>>>http://railscasts.com/episodes/229-polling-for-changes?autoplay=true
>
> >>>>>> one more option is to keep @mapped_sites to a javascript variable so
> >>> you
> >>>>>> dont have to use ajax. you might also want to move the makeMarker
> >>> part
> >>>>>> to a js function to tidy up the view and just call that function
> >>> when you
> >>>>>> need
> >>>>>> to update the colors
>
> >>>>>> something along the lines of
>
> >>>>>> var sites = <%= @mapped_sites.to_json %>;
> >>>>>> addCircles(sites);
>
> >>>>>> function addCircles(circles) {
> >>>>>> for(i=0; i<circles.length; i++) {
> >>>>>> center = new google.maps.LatLng(circles[i][0], circles[i][1]);
> >>>>>> siteCircle = makeMarker({
> >>>>>> position: center,
> >>>>>> strokeColor: "#FF0000",
> >>>>>> strokeOpacity: 0.8,
> >>>>>> strokeWeight: 2,
> >>>>>> fillColor: circles[i][7],
> >>>>>> fillOpacity: 0.75,
> >>>>>> radius: 560,
> >>>>>> map: map,
> >>>>>> center: center,
> >>>>>> radius: circles[i][2],
> >>>>>> title: circles[i][5],
> >>>>>> content: 'content'
> >>>>>> });
> >>>>>> }
>
> >>>>>> }
>
> >>>>>> then you just need to update the sites variable using js. no need
> >>>>>> to go back to the server.
>
> >>>>>>>> On Thu, Dec 8, 2011 at 1:10 AM, skrite <sh...@skrite.net> wrote:
>
> >>>>>>>>> Hey all,
> >>>>>>>>> i have a google map and i am drawing circles on the map like
> >>> this..
>
> >>>>>>>>> var latlng = new google.maps.LatLng(35.931387,
> >>>>>>>>> -102.31062);
> >>>>>>>>> var myMapOptions =
> >>>>>>>>> {
> >>>>>>>>> zoom:
> >>>>>>>>> 12,
> >>>>>>>>> center:
> >>>>>>>>> latlng,
> >>>>>>>>> mapTypeId:
> >>>>>>>>> google.maps.MapTypeId.HYBRID
> >>>>>>>>> };
>
> >>>>>>>>> var map = new
> >>>>>>>>> google.maps.Map(document.getElementById("map_canvas"),
> >>>>>>>>> myMapOptions);
> >>>>>>>>> var infoWindow = new
> >>>>>>>>> google.maps.InfoWindow();
> >>>>>>>>> var markerBounds = new
> >>>>>>>>> google.maps.LatLngBounds();
>
> >>>>>>>>> <% @mapped_sites.each do |row|
> >>>>>>>>> %>
>
> >>>>>>>>> // main
> >>>>>>>>> circle
> >>>>>>>>> center = new google.maps.LatLng(<%= "#{row[0]}" %>, <%=
> >>>>>>>>> "#{row[1]}"
> >>>>>>>>> %>);
> >>>>>>>>> siteCircle =
> >>>>>>>>> makeMarker({
> >>>>>>>>> position:
> >>>>>>>>> center,
> >>>>>>>>> strokeColor:
> >>>>>>>>> "#FF0000",
> >>>>>>>>> strokeOpacity:
> >>>>>>>>> 0.8,
> >>>>>>>>> strokeWeight:
> >>>>>>>>> 2,
> >>>>>>>>> fillColor: '<%= "#{row[7]}"
> >>>>>>>>> %>',
> >>>>>>>>> fillOpacity:
> >>>>>>>>> 0.75,
> >>>>>>>>> radius:
> >>>>>>>>> 560,
> >>>>>>>>> map:
> >>>>>>>>> map,
> >>>>>>>>> center:
> >>>>>>>>> center,
> >>>>>>>>> radius: <%= "#{row[2]}"
> >>>>>>>>> %>,
> >>>>>>>>> title: '<%= "#{row[5]}"
> >>>>>>>>> %>',
> >>>>>>>>> content: '<%= "some contnet
> >>>>>>>>> %>'
> >>>>>>>>> });
>
> >>>>>>>>> markerArray.push(siteCircle);
>
> >>>>>>>>> my question is, that since the fillColor is going to change
> >>> from
> >>>>> time
> >>>>>>>>> to time, i want to update all the colors of the circles
> >>>>> periodically.
> >>>>>>>>> What i don't know how to do is get the equivelent to the
> >>>>>>>>> @mapped_sites because if i could, i think i could just delete
> >>> the
> >>>>>>>>> existing circles and draw new ones.
>
> >>>>>>>>> How do i get info back from the server periodically to update
> >>> the
> >>>>>>>>> circle colors?
>
> >>>>>>>>> thanks to all.
> >>>>>>>>> skrite
>
> >>>>>>>>> --
> >>>>>>>>> You received this message because you are subscribed to the
> >>> Google
> >>>>>>> Groups "Ruby on Rails: Talk" group.
> >>>>>>>>> To post to this group, send email to
> >>>>> rubyonrails-talk@googlegroups.com
> >>>>>>> .
> >>>>>>>>> To unsubscribe from this group, send email to
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> >>>>>>>>> For more options, visit this group athttp://
> >>>>>>> groups.google.com/group/rubyonrails-talk?hl=en.
>
> >>>>>>>> --
>
> >>>>>>>> Regards,
> >>>>>>>> L.KarthiKeyan.
>
> >>>>>>> --
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> >>>>>> --
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>
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> >>>> --
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>
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> >> --
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>
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