[mapguide-users] window open

[Mark Pendergraft]

What you have looks pretty good, except that you will need to create a
box that covers your point for the mgPolygon.

First you need to create a MgCoordinateCollection to populate a
MgLinearRing, then you use $geometryFactory->CreatePolygon(mgLinearRing,
nothing);

Take a look at this function.  It uses MgGeometryFactory, and a MgPoint
to create a box that surrounds the point supplied.  The function returns
a MgPolygon

    Private Function GetBoundingBox(ByVal geomFact As MgGeometryFactory,
ByVal point As MgPoint) As MgPolygon
        
        Dim pgon As MgPolygon
        Dim coordColl As New MgCoordinateCollection
        coordColl.Add(geomFact.CreateCoordinateXY(point.Coordinate.GetX
- 5, point.Coordinate.GetY + 5))
        coordColl.Add(geomFact.CreateCoordinateXY(point.Coordinate.GetX
+ 5, point.Coordinate.GetY + 5))
        coordColl.Add(geomFact.CreateCoordinateXY(point.Coordinate.GetX
+ 5, point.Coordinate.GetY - 5))
        coordColl.Add(geomFact.CreateCoordinateXY(point.Coordinate.GetX
- 5, point.Coordinate.GetY - 5))
        coordColl.Add(geomFact.CreateCoordinateXY(point.Coordinate.GetX
- 5, point.Coordinate.GetY + 5))
        
        Dim linRing As MgLinearRing =
geomFact.CreateLinearRing(coordColl)
        pgon = geomFact.CreatePolygon(linRing, Nothing)
        
        Return pgon
        
    End Function

You can create a MgPoint by doing the following:

            Dim geomFact As New MgGeometryFactory
            Dim coord As MgCoordinate = geomFact.CreateCoordinateXY(X,
Y)

            ' create the actual mggeometry
            Dim point As MgPoint = geomFact.CreatePoint(coord)


The LayerResourceId & schema can be obtained like so:

                ' get the layer to search
                Dim layer as MgLayer =
Map.GetLayers().GetItem("your_layer_name_here")
                
                ' Get the layer resource identifier
                Dim LayerResId As New
MgResourceIdentifier(layer.GetFeatureSourceId())

			 ' get the layer default schema
			 Dim layerSchema as string =
layer.GetFeatureClassName


As a side note.  Everytime you assign a value to the MgFeatureReader,
you will need to close it immediately afterwards.  This has screwed me a
few times.

After you get the point, you can use the MgFeatureReader to getString(),
or getInteger(), etc.... to obtain the values that you need to pass to
your pop-up window.

Out of curiosity, why did you choose to go this route instead of the
pop-up MapTip with a link to your new window?  The only reason I have
code like this in my map is so I can zoom to a point returned from
Google Maps when the user enters an address into a search field.  I much
prefer the simplicity of letting MapGuide do the grunt work.  ;)
-Mark





-----Original Message-----
From: mapguide-users-bounces at lists.osgeo.org
[mailto:mapguide-users-bounces at lists.osgeo.org] On Behalf Of DYUTI
Sent: Thursday, February 19, 2009 11:03 PM
To: mapguide-users at lists.osgeo.org
Subject: RE: [mapguide-users] window open


hi....

  thank u very much mark..
 But i've still doubts in this .shall i use
"
$geometryFactory = new MgGeometryFactory();
$mgPolygon = $geometryFactory->Create mgPolygon($gp.x,$gp.y);  "

to create mg polygons from the N/E coordinates.

Instead of "geom" u have used in vb coding shall i use this
$mgPolygon.Then
for getting  LayerResourceID & Schema shall i use coding or can i
directly
give that values..


Thanks and regards

dyuti



Mark Pendergraft wrote:
> 
> In VB:
> 
> Dim geom As MgGeometry
> Dim query As New MgFeatureQueryOptions()
> query.SetSpatialFilter("Geometry", geom,
> MgFeatureSpatialOperations.Intersects)
> Dim fr as MgFeatureReader = FeatService.SelectFeatures(LayerResId,
> "Default:Temp", query)
> 
> Note that geom is a mggeometry object used to query the layer.  It
could
> be a point, polygon, etc.
> LayerResId refers to the MgResourceIdentifier for a specified layer
> "Default:Temp" is the layer's schema name.
> 
> In your case, you will probably want to create a MgPolygon from the
> point the user clicked.  Then you will use the layer containing the
> points you want to display info about to get your LayerResId and
default
> schema.
> 
> -Mark
> 
> -----Original Message-----
> From: mapguide-users-bounces at lists.osgeo.org
> [mailto:mapguide-users-bounces at lists.osgeo.org] On Behalf Of DYUTI
> Sent: Wednesday, February 18, 2009 11:32 PM
> To: mapguide-users at lists.osgeo.org
> Subject: Re: [mapguide-users] window open
> 
> 
> hi all.....
>     any one plss tell me how to generate spatial filter. 
> any suggestions will be appreciated
> 
> thanks and Regards
> 
> dyuti
> 
> DYUTI wrote:
>> 
>> Thank u mark ....i'll try this
>> 
>> regards
>> dyuti
>> 
>> Mark Pendergraft wrote:
>>> 
>>> Here are 2 ways to accomplish what you are trying to do:
>>> 
>>> Option 1:
>>> You have a widget which inherits Fusion.Tool.Canvas.
>>> Use the mousedown even to get the coordinates clicked
>>> Then use 
>>> "var p = this.getMap().getEventPosition(e);" to get the event
> position
>>> "var gp = this.getMap().pixToGeo(p.x, p.y);" to get the N/E at that
>>> position
>>> 
>>> Then send your northing and easting to a PHP page and use it to
> generate
>>> a spatial filter (you may want to create a mgPolygon from your N/E
as
>>> your spatialfilter in order to make sure you cover the point)
>>> 
>>> Return the selected point, and send it to another page to create
your
> pop
>>> up window populated with the relevant information.
>>> 
>>> Option 2:
>>> Use the URL feature in studio to show a link.  Use expressions to
> pass
>>> the points information into the link, and have the link directed to
a
>>> custom page which will populate itself with the relevant data.
>>> 
>>> 
>>> Seeing as you are new to MapGuide, I would highly recommend option
2,
> as
>>> it requires very little coding and is very easy and user friendly.
I
>>> have attached a photo of what the URL maptip looks like in my map.
> In
>>> the picture, the user hovers there mouse over a parcel and the
maptip
>>> pops up with a link to the parcel's page on the county's website.
> All I
>>> have to do is pass the parcel number in the link, which is all done
> by
>>> studio.
>>> 
>>>  http://n2.nabble.com/file/n2315851/Untitled.jpg 
>>> 
>>> -Mark 
>>> 
>>> 
>>> DYUTI wrote:
>>>> 
>>>>   hi..all...
>>>>             to open a new window while clicking on the points
> displayed
>>>> on the map where i've to write the coding...In which file i've to
> make
>>>> changes..&what change i've to make...plss help me... 
>>>> 
>>>> 
>>>> 
>>>> 
>>>> thanks&regards
>>>> dyuti
>>>> 
>>> 
>>> 
>> 
>> 
> 
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> 
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