On Nov 12, 6:34 am, Canam Group <canamgr...@gmail.com> wrote:
> Hi,
>
> I'm in the process of migrating our Map application from V2 to
> V3 (3.2). Sorry, I can't post a link to our map cause we use it
> internally (don't worry, we paid for this).
That doesn't mean you can't find public (possibly even free) hosting
and put a map there that exhibits the problem.
>
> I had a loop that read LatLng and put them in a array to display
> as a Polyline on the map.
> I then set the length of my array to 0 and then fill it again in
> the loop with other LatLng to display another Polyline... and so
> on (many times).
>
> It was working fine in V2, but not in V3.
> Since my code is complex, I tried to write the simpliest code
> possible to demonstrate my issue:
>
> function setPolyline(points) {
> var polyline = new google.maps.Polyline({
> path: points,
> strokeColor: '#FF0000',
> strokeOpacity: 0.5,
> strokeWeight: 2});
>
> polyline.setMap(map);
>
> }
>
> var mapDiv = document.getElementById('map');
> var mapCenter = new google.maps.LatLng(0,0);
> var mapOptions = {
> zoom: 2,
> center: mapCenter,
> backgroundColor: '#E1E1E1',
> mapTypeId: google.maps.MapTypeId.ROADMAP}
>
> map = new google.maps.Map(mapDiv, mapOptions);
>
> var points=[];
> points[0]=new google.maps.LatLng(-35, 71);
> points[1]=new google.maps.LatLng(-36, 75);
> points[2]=new google.maps.LatLng(-37, 91);
> setPolyline(points);
>
> points.length=0;
> points[0]=new google.maps.LatLng(-31, 71);
> points[1]=new google.maps.LatLng(-32, 75);
> setPolyline(points);
>
> What happens is that only the second Polyline is shown (and not the
> first one).
> To make it works, I have to either use a different variable name
> (points1, points2, points3, ...) which I can't use because my code is
> normally in a loop or re-declare my variable each time in the loop
> instead of before it (var points=[] before each Polyline and remove the
> points.length=0 line).
>
> Maybe I'm missing something about JavaScript, but I usually declare my
> variable outside the loop (before) once and use it inside the loop.
>
> What am I doing wrong?
> Can someone help?
Not without a link. I can create many polylines in a loop, here is an
example with three:
http://www.geocodezip.com/geoxml3_test/v3_geoxml3_tennis-lines_highlight.html
-- Larry
>
> Thanks!
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