[mapguide-users] Draw Circle
Andy Morsell
amorsell at spatialgis.com
Fri Apr 3 12:10:18 EDT 2009
Looks like you have it all exactly correct (comparing it line by line to
some code I did awhile back, I started with the same sample code from this
list it looks like). The one thing you are missing is the following. It
should be between the curvePolygon abd byteReader lines:
curvePolygon = (MgCurvePolygon)curvePolygon.Transform(this.GetTransform());
Where GetTransform is a function you should already have defined in your
markupeditor file. I think your circle is being created and drawn, but not
in the correct coordinate system.
Andy Morsell, P.E.
Spatial Integrators, Inc.
www.SpatialGIS.com
-----Original Message-----
From: mapguide-users-bounces at lists.osgeo.org
[mailto:mapguide-users-bounces at lists.osgeo.org] On Behalf Of A H
Sent: Friday, April 03, 2009 3:01 AM
To: mapguide-users at lists.osgeo.org
Subject: Re: [mapguide-users] Draw Circle
this is what i got. no error, but the circle didn't appear.
MgCurveSegmentCollection curveSegmentCollection = new
MgCurveSegmentCollection();
MgCurveRingCollection curveRingCollection = new
MgCurveRingCollection();
// create first curve segment for the external boundary
MgCoordinate startCoordinate =
geometryFactory.CreateCoordinateXY(X1 - rad, Y1);
MgCoordinate controlCoordinate =
geometryFactory.CreateCoordinateXY(X1, Y1 + rad);
MgCoordinate endCoordinate =
geometryFactory.CreateCoordinateXY(X1 + rad, Y1);
MgArcSegment arcSegment =
geometryFactory.CreateArcSegment(startCoordinate, endCoordinate,
controlCoordinate);
curveSegmentCollection.Add(arcSegment);
// create second curve segment for the external boundary
MgCoordinate startCoordinate2 =
geometryFactory.CreateCoordinateXY(X1 + rad, Y1);
MgCoordinate controlCoordinate2 =
geometryFactory.CreateCoordinateXY(X1, Y1 - rad);
MgCoordinate endCoordinate2 =
geometryFactory.CreateCoordinateXY(X1 - rad, Y1);
MgArcSegment arcSegment2 =
geometryFactory.CreateArcSegment(startCoordinate, endCoordinate,
controlCoordinate);
curveSegmentCollection.Add(arcSegment2);
// create curve ring for the external boundary
MgCurveRing exteriorCurveRing =
geometryFactory.CreateCurveRing(curveSegmentCollection);
// create curve polygon
MgCurvePolygon polygon =
geometryFactory.CreateCurvePolygon(exteriorCurveRing, null);
MgByteReader geom = geometryReaderWriter.Write(polygon);
properties.Add(new MgGeometryProperty("GEOM", geom));
i need help with this too.
Hi Kencana,
I remember u telling me that you have figured out how to draw a circle.
Could you please give me some tips on this? For example, in the
OnCircleDigitized(Circle) method, what all attributes do we need to get from
the circle and using what methods? I couldn't find any help on this...:-(
So far, all I have got is:
function OnCircleDigitized(Circle)
{
var radius = Circle.Radius;
}
Also, how do u create the circle on the server side using the method:
CreateCurvePolygon?
Thanks and regards
Farah
-----Original Message-----
From: kencana kesuma [mailto:bluesky_dyx at hotmail.com]
Sent: Monday, December 04, 2006 1:25 PM
To: farah at egovernments.org
Subject: RE: polygon color
Hi Farah,
I guess I have figure out how to draw the circle already.
instead of using CreatePolygon command,
I used CreateCurvePolygon to draw the circle.
I defined 2 arc lat long position and it works.
Anyway, thank you very much.
Without your references, I guess I am not able to do it.
once again thank you.
Regards,
Kencana
>From: "Farah" <farah at egovernments.org>
>To: "'kencana kesuma'" <bluesky_dyx at hotmail.com>
>Subject: RE: polygon color
>Date: Mon, 4 Dec 2006 13:12:51 +0530
>
>Hi Kencana..
>
>
>I don't know about this..i havent tried it...
>I will pass on any info that I get on this..if I do..!! :-)
>
>
>
>farah
>
>-----Original Message-----
>From: kencana kesuma [mailto:bluesky_dyx at hotmail.com]
>Sent: Monday, December 04, 2006 11:51 AM
>To: farah at egovernments.org
>Subject: RE: polygon color
>
>Hi,
>
>I mean,
>can we draw circle other than drawing polygon?
>I was wondering is there any API for drawing circle on the map.
>Thank you.
>
>Regards,
>Kencana
>
>
> >From: "Farah" <farah at egovernments.org>
> >To: "'kencana kesuma'" <bluesky_dyx at hotmail.com>
> >Subject: RE: polygon color
> >Date: Mon, 4 Dec 2006 11:52:02 +0530
> >
> >Hi...
> >
> >Ur welcome!
> >Im sorry....i didn't get u..! Which circle?
> >
> >Regards
> >Farah
> >
> >-----Original Message-----
> >From: kencana kesuma [mailto:bluesky_dyx at hotmail.com]
> >Sent: Monday, December 04, 2006 11:45 AM
> >To: farah at egovernments.org
> >Subject: RE: polygon color
> >
> >Hi Farah,
> >
> >Thank you very much for the reply...
> >It helps.:):):)
> >
> >Anyway,
> >We use CreatePolygon for drawing the polygon
> >any idea for the circle?
> >Sorry for keep distrubing you
> >Please don't mind...
> >
> >Thank you very much
> >
> >Regards,
> >Kencana
> >
> >
> > >From: "Farah" <farah at egovernments.org>
> > >To: "'kencana kesuma'" <bluesky_dyx at hotmail.com>
> > >CC: <users at mapguide.osgeo.org>
> > >Subject: RE: polygon color
> > >Date: Mon, 4 Dec 2006 11:31:34 +0530
> > >
> > >Hi Kencana,
> > >
> > >In the studio, when you are giving a style to a particular scale range:
> > >for
> > >a layer, we have an option to set the transparency ( from 0 to 100: 0
> >means
> > >not transaprent and as you go towards 100, the transparency increases
>and
> > >the colour changes accordingly!). Now if you save this layer as xml,you
> > >will
> > >get the required styling info and colour.
> > >
> > >For example:
> > >
> > ><AreaSymbolization2D>
> > > <Fill>
> > > <FillPattern>Solid</FillPattern>
> > > <ForegroundColor>80800000</ForegroundColor>
> > > <BackgroundColor>FF000000</BackgroundColor>
> > > </Fill>
> > > <Stroke>
> > > <LineStyle>Solid</LineStyle>
> > > <Thickness>0.0</Thickness>
> > > <Color>FFC0C0C0</Color>
> > > <Unit>Centimeters</Unit>
> > > </Stroke>
> > ></AreaSymbolization2D>
> > >
> > >
> > >
> > >
> > >This colours: forground: 80800000 and background: FF000000 give a
> >slightly
> > >transparent red shade to the polygon.
> > >
> > >
> > >Regards
> > >Farah
> > >
> > >
> > >-----Original Message-----
> > >From: kencana kesuma [mailto:bluesky_dyx at hotmail.com]
> > >Sent: Monday, December 04, 2006 9:43 AM
> > >To: farah at egovernments.org
> > >Subject: polygon color
> > >
> > >Hi Farah,
> > >
> > >Do you know how to make the polygon bg color transparent?
> > >so that only the polygon fill and the outline layer can be seen?
> > >
> > >Hope you can help me out
> > >
> > >Regards,
> > >Kencana
> > >
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