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.
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>>
>>>>>>>> --
>>
>>>>>>>> Regards,
>>>>>>>> L.KarthiKeyan.
>>
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>>
>>>>>> --
>>>>>> -------------------------------------------------------------
>>>>>> visit my blog athttp://jimlabs.heroku.com
>>
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>>
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