Thanks for the help, Ben. I've been moving brackets, commas and
parentheses around like mad for an hour or two now but am still having
trouble. I tried your suggestion and got it working, but the trouble
comes in when I try to specify a polygon with an inner ring/
exclusion. Let me detail it a bit...
poly = new google.maps.Polygon({});
path = new google.maps.MVCArray([new google.maps.LatLng
(40.79607046969819, -74.03931065508519),new google.maps.LatLng
(40.79594051506491, -73.99828358599339),new google.maps.LatLng
(40.77033449116813, -73.99845524737034),new google.maps.LatLng
(40.77072450463922, -74.03828068682347)]);
poly.setPaths(path);
This code works fine. It creates a square(ish) polygon over West New
York, NJ. If I try to add another path...
path = new google.maps.MVCArray([new google.maps.LatLng
(40.787492918244446, -74.03089924761449),new google.maps.LatLng
(40.78879261847979, -74.007038316218),new google.maps.LatLng
(40.77657443199805, -74.00652333208714),new google.maps.LatLng
(40.777484374404445, -74.03038426348363)]);
poly.setPaths(path);
... it creates a second, smaller rectangle inside the first. As
expected, they are separate polygons. What I'd like to do is specify
these as a singly polygon with the smaller rectangle as an exclusion
of the larger. Here is what I tried:
path = new google.maps.MVCArray([new google.maps.LatLng
(40.79607046969819, -74.03931065508519),...],[new google.maps.LatLng
(40.787492918244446, -74.03089924761449),...]);
The method works but only adds the first polygon to the map, ignoring
the rest of the array.
path = new google.maps.MVCArray([[new google.maps.LatLng
(40.79607046969819, -74.03931065508519),...], [new google.maps.LatLng
(40.787492918244446, -74.03089924761449),...]]);
This method doesn't work and gives the invalid constructor (object)
error.
I've also tried manually adding points to the sub-arrays... path[0][1]
= new LatLng(); but couldn't get that going either.
I'm hoping this is just my lack of understanding about the MVCArray...
Is it possible to properly structure a multidimensional array as input
for the MVCArray such that it will produce polygons with inner
rings?
I've looked at the pentagon example (http://gmaps-samples-
v3.googlecode.com/svn/trunk/poly/pentagon.html) but that is using a
regular multi-dim array, which is basically what I'm doing now. I'd
really like to have it as an MVCArray so I can trigger the updates
automatically.
- Jim
On Nov 24, 12:58 am, Ben Appleton <[email protected]> wrote:
> On Tue, Nov 24, 2009 at 6:05 AM, arclyte <[email protected]> wrote:
> > Can anyone (Ben?) provide an example of how I can prepopulate an
> > MVCArray? I think that's my problem.
>
> If you write
> new MVCArray([... your points here ...]);
> then the MVCArray adopts the given array for its internal storage. The
> .setAt(), .insertAt(), .deleteAt() methods will modify the given array, and
> fire change events so the polygon knows to redraw.
>
> Ben, the example you provide instantiates an empty array and fill it
>
> > on click. I'm doing that in my script, but it must also pre-load some
> > stored polygons. I'm trying to get away from the way we used to do it
> > in v2 with a thousand lines of pushing points. If I could construct
> > the array of points and define it in the constructor that'd be much
> > better, to my eyes anyway. I've tested and can manually push (.setAt)
> > points into the path/poly but any time I've tried to pre-define it I
> > get the constructor errors I've mentioned. Thanks!
>
> > - Jim
>
> > On Nov 23, 12:45 pm, arclyte <[email protected]> wrote:
> > > I kind of hacked this together based on a prototype, so it's gone
> > > through a few different versions. I had tried to simplify things and
> > > ended up changing path from an MVCArray to just an array. It looks
> > > like that's probably my downfall, forcing me to update the polygon in
> > > order to see the changes that were made in the path.
>
> > > I did that, though, because I've had some trouble getting MVCArray
> > > working correctly. I keep getting errors like this: "Invalid value
> > > for constructor parameter 0: [object Object]
> >http://maps.gstatic.com/intl/en_us/mapfiles/api-3/22a/main.jsLine
> > > 52". I'm guessing it's just syntax, but I'm not familiar enough with
> > > the MVCArray to figure it out in this context.
>
> > > Back to fiddling with it I suppose... Thanks for the response!
>
> > > On Nov 22, 7:34 pm, Ben Appleton <[email protected]> wrote:
>
> > > > On Sat, Nov 21, 2009 at 5:49 AM, arclyte <[email protected]> wrote:
> > > > > I'm guessing that this is a bug in my code somewhere, but I haven't
> > > > > been able to figure out where just yet.
>
> > > > > Here is the sample for my current code:
> > > > >http://arclyte.netdojo.com/geo/polyDraw.php
>
> > > > > If you click on the map you'll start placing markers, or you can
> > click
> > > > > on the color box next to a polygon to load markers for that polygon
> > > > > and edit it.
>
> > > > > My polygon is defined as an array of polygons, so the new (green)
> > > > > polygon is in poly[2]. If you click and add points to the polygon
> > you
> > > > > can see that the points actually are contained within the object but
> > > > > the polygon display is not being updated.
>
> > > > > I've found that if I call poly[n].setMaps(map) on the polygon I'm
> > > > > editing it will redraw and show the new/edited points. But that
> > means
> > > > > redrawing the polygon each time... I'm afraid that won't scale very
> > > > > well if we get very large polygons. It also gives a nice flicker
> > > > > every time you draw a point which I'd rather avoid.
>
> > > > I see you've tried MVCArray's .insertAt(), which notifies the polygon
> > of a
> > > > change in its coordinates. But that code is currently commented out.
> > Did
> > > > that not work?
>
> > > > For reference, I use MVCArray's .insertAt() in this polygon editing
> > demo:http://gmaps-samples-v3.googlecode.com/svn/trunk/poly/poly_edit.html
>
> > > > --
>
> > > > > You received this message because you are subscribed to the Google
> > Groups
> > > > > "Google Maps JavaScript API v3" group.
> > > > > To post to this group, send email to
> > > > > [email protected].
> > > > > To unsubscribe from this group, send email to
> > > > > [email protected]<google-maps-js-api-v3%[email protected]>
> > <google-maps-js-api-v3%[email protected]<google-maps-js-api-v3%[email protected]>
>
> > > > > .
> > > > > For more options, visit this group at
> > > > >http://groups.google.com/group/google-maps-js-api-v3?hl=.
>
> > --
>
> > You received this message because you are subscribed to the Google Groups
> > "Google Maps JavaScript API v3" group.
> > To post to this group, send email to
> > [email protected].
> > To unsubscribe from this group, send email to
> > [email protected]<google-maps-js-api-v3%[email protected]>
> > .
> > For more options, visit this group at
> >http://groups.google.com/group/google-maps-js-api-v3?hl=.
--
You received this message because you are subscribed to the Google Groups
"Google Maps JavaScript API v3" group.
To post to this group, send email to [email protected].
To unsubscribe from this group, send email to
[email protected].
For more options, visit this group at
http://groups.google.com/group/google-maps-js-api-v3?hl=en.
