I did it ! :)
With Polygon.. it's a bit long, but It's work...
I use the JS example in : http://maps.forum.nu/gm_sensitive_circle2.html
With GWT it is :
public void doDrawCircle(LatLng center, double radius) {
LatLng[] circlePoints = new LatLng[361];
Polygon circle;
double PI = 3.1415;
double d = radius / 6378.8; // radians
double lat1 = (PI / 180) * center.getLatitude(); // radians
double lng1 = (PI / 180) * center.getLongitude(); // radians
for (int a = 0; a < 361; a++) {
double tc = (PI / 180) * a;
double y = Math.asin(Math.sin(lat1) * Math.cos(d) +
Math.cos(lat1)
* Math.sin(d) * Math.cos(tc));
double dlng = Math.atan2(Math.sin(tc) * Math.sin(d)
* Math.cos(lat1), Math.cos(d) -
Math.sin(lat1)
* Math.sin(y));
double x = ((lng1 - dlng + PI) % (2 * PI)) - PI; // MOD
function
LatLng point = LatLng.newInstance(y * (180 / PI), x *
(180 / PI));
circlePoints[a] = point;
}
circle = new Polygon(circlePoints, "#FF0000", 1, 1.0,
"#FF0000", .
7);
map.addOverlay(circle);
}
Thanks eric for Week-end support ;)
Samuel
On 28 sep, 00:47, "Eric Ayers" <[EMAIL PROTECTED]> wrote:
> Actually, I was referring to the Maps API when I said I couldn't find a way
> to do it.
>
>
>
> On Sat, Sep 27, 2008 at 10:58 AM, Samuel <[EMAIL PROTECTED]> wrote:
>
> > Thanks eric,
>
> > I'm sure it's possible with Maps API, but with the gwt-maps API I
> > can't find solution.
>
> > Maybe it's a good solution to use image...
> > But I need use getBounds().containsLatLng(..) to known if a point is
> > in this circle. I'm not sure it's work with a picture...
>
> > Samuel
>
> > On 27 sep, 15:24, "Eric Ayers" <[EMAIL PROTECTED]> wrote:
> > > Samuel,
>
> > > You might want to go search the Maps API google group for this one. I
> > don't
> > > see an obvious way to make one (like a GCircle or GEllipse class).
>
> > > The geodesic polyline support uses a segmented line to represent an arc.
> > > You could do that by creating a lot of points out for a Polygon.
>
> > > Another way you could do this is to create an image of a circle and then
> > > make a GroundOverlay out of it. It would look a bit different from a
> > > Polyline or Polygon.
>
> > > -Eric.
>
> > > On Sat, Sep 27, 2008 at 3:58 AM, Samuel <[EMAIL PROTECTED]> wrote:
>
> > > > Hi,
>
> > > > I have a very simple question :)
> > > > How draw a circle in a maps with gwt-maps library ?
> > > > Have you got an example ? (I do Polygon but I can't make circle :( )
>
> > > > Thanks
>
> > > > Samuel
>
> > > --
> > > Eric Z. Ayers - GWT Team - Atlanta, GA USAhttp://
> > code.google.com/webtoolkit/
>
> --
> Eric Z. Ayers - GWT Team - Atlanta, GA USAhttp://code.google.com/webtoolkit/
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