On 14 Dec 2011, at 09:12, skrite <sh...@skrite.net> wrote:
> OK, i did try your example and the circles disappear, but never > update. Then, nothing. there are no errors in the inspect element of > chrome under the console, nothing updates, it just kinda freezes > there. I can see the queries being pulled in the webrick server logs. > a prettier image of the code is here http://pastie.org/3014696 > (also more complete). Because you've called the parameter that is passed to you Ajax callback 'response', you need response.responseJSON not request.responseJSON Stick a breakpoint in there to investigate further Fred > I know i am fumbling over something obvious here, but just cannot seem > to work it out. > > when i use the request address update_mapv3_circles in a browser, this > is the response > [["35.931341","-102.32205",381.75,287.4,"AL","AL", > 557,"#7F7F7F","#FF0000",287.8,287.6,"AL<br>0 psi",0], > ["35.88125039","-102.3088989",525.0,83.4,"DC","DC", > 34280,"#7F7F7F","#FF0000",83.6,83.1,"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",534.75,74.8,"J1","J1", > 559,"#7F7F7F","#FF0000",74.6,74.5,"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", > 397.5,82.1,"SL1","SL1",561,"#7F7F7F","#FF0000",80.9,81.9,"SL1<br>0 > psi",0],["35.931186","-102.304202",390.0,165.4,"SL2","SL2", > 110823130,"#7F7F7F","#FF0000",165.5,165.6,"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",397.5,23.4,"SL5","SL5", > 564,"#7F7F7F","#FF0000",23.0,23.4,"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]] > > in the view source of the website where <%= @mapped_sites.to_json %> > is , i have this > var sites = [["35.931341","-102.32205",381.75,287.4,"AL","AL", > 557,"#7F7F7F","#FF0000",287.8,287.6,"AL<br>0 psi",0], > ["35.88125039","-102.3088989",525.0,83.4,"DC","DC", > 34280,"#7F7F7F","#FF0000",83.6,83.1,"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",534.75,74.8,"J1","J1", > 559,"#7F7F7F","#FF0000",74.6,74.5,"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", > 397.5,82.1,"SL1","SL1",561,"#7F7F7F","#FF0000",80.9,81.9,"SL1<br>0 > psi",0],["35.931186","-102.304202",390.0,165.4,"SL2","SL2", > 110823130,"#7F7F7F","#FF0000",165.5,165.6,"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",397.5,23.4,"SL5","SL5", > 564,"#7F7F7F","#FF0000",23.0,23.4,"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]]; > > Anyway, thanks for all of your help so far, this is at least less > baffling to me than it was a couple of days ago. > > > sk > > > On Dec 14, 2:52 am, Frederick Cheung <frederick.che...@gmail.com> > wrote: >> On 14 Dec 2011, at 05:47, skrite <sh...@skrite.net> wrote: >> >>> ok, even though the @mapped_sites.to_json works, the output of that >>> does not look like json. It looks like an array >> >> If my memory is correct, that's valid json too ( as are most literals). It's >> common for the top level thing to be an object rather than an array, but not >> mandatory. Since the thing you called to_json on was an array, you got the >> json representation of an array back. >> >> To get the non text version of the response, like I said earlier look at >> response.responseJSON >> >> Fred >> >> >> >> >> >> >> >>> 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 >> >> ... >> >> read more ยป > > -- > 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 > rubyonrails-talk+unsubscr...@googlegroups.com. > For more options, visit this group at > http://groups.google.com/group/rubyonrails-talk?hl=en. > -- You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. 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