[mapguide-users] Fusion and Digitizing

[Mark Pendergraft]

I was in no way implying the wheel should be reinvented, in fact the
code I posted was an example of how to use the MapGuideViewerAPI.js
supplied DigitizePolygon(handler) function that you referred to.

I did say that I would like to see some method to clear the digitized
shapes after the function's handler has been called.  In MGOS 1.2 after
a polygon was digitized, it was destroyed.  In MGOS 2 with Fusion 1.1,
the polygon stays on the map until the user closes their browser.

-Mark P.

-----Original Message-----
From: mapguide-users-bounces at lists.osgeo.org
[mailto:mapguide-users-bounces at lists.osgeo.org] On Behalf Of GordonL
Sent: Thursday, January 29, 2009 1:20 PM
To: mapguide-users at lists.osgeo.org
Subject: RE: [mapguide-users] Fusion and Digitizing


You know, you really do not need to reinvent the wheel, if you have
already
built a lot of code with the Basic Web Layouts.  Did you know that
Fusion
supports some retro digitizing methods?
For example, I put the following in an INVOKESCRIPT in the Flexible Web
Layout:

top.parent.DigitizePoint(top.OnPointDigitized);

I also have the OnPointDigitized in a JS file attached to the main
frame/window.  So I reuse my code for both FUSION and Basic Web
Layouts...

Just check out the functions in the MapGuideViewerApi.js in the
/www/fusion/MapGuide/ folder...
They include:
Refresh()
SetSelectionXML(selectionXml)
ZoomToView(x, y, scale, refresh)
DigitizePoint(handler)
DigitizeLine(handler)
DigitizeLineString(handler)
DigitizeRectangle(handler)
DigitizePolygon(handler)

They work just like the classic MapGuide Viewer API...pretty sweet.

gordon




Mark Pendergraft wrote:
> 
> Absolutely.
> My biggest beef with digitizing in Fusion is that when you digitize an
> object (point/polygon/etc.) it stays on the map.  The existing
functions
> don't have a clear method to remove the digitized object, and my
> programming skills aren't good enough that I want to mess with it.
> 
> It's very simple,
> Add a reference to MapGuideViewerApi.js and call DigitizePolygon()
> 
> The DigitizePolygon function requires that you pass it a handler
> 
> Something similar to the following:
> 
> DigitizePolygon(CreateJobByPolygon);  
> 
> function CreateJobByPolygon(polygon) {
>     var geomText = polygon.Count;
>     for (var i = 0; i < polygon.Count; i++){
>         geomText += "," + polygon.Point(i).X + "," +
polygon.Point(i).Y;
>     }
>     Fusion.getWidgetById('Map').setCursor('auto');
> //	here you would send your geomText to a web service, or aspx page
> that would turn the coordinates into a linear ring
> //    and then a polygon from there.  The geomText variable (in this
> particular situation) evaluates to something similar to 
> //    3,5000.00,5000.00,5050.00,5050.00,5100.00,5100.00
> }
> 
> 
> Of course you can format the way the coordinates are sent to your
> application any way you want.
> 
> I would also recommend calling the DigitizePolygon() function from an
> InvokeScript() widget, as I had some problems when I tried to actually
> create a widget and call it from there.  Also, I prefer to change my
> cursor when the widget is activated, you can see I put it back to
'auto'
> in the CreateJobByPolygon() function, but I like to set it to
> 'crosshair' before the DigitizePolygon function is called.
> 
> -Mark P.
> 
> -----Original Message-----
> From: mapguide-users-bounces at lists.osgeo.org
> [mailto:mapguide-users-bounces at lists.osgeo.org] On Behalf Of Stefan
> Dalakov
> Sent: Friday, January 23, 2009 12:35 PM
> To: MapGuide Users Mail List
> Subject: [mapguide-users] Fusion and Digitizing
> 
> Hi all,
>  From what I read here, should I conclude that digitizing functions in

> Fusion are not yet fully supported ?
> I need to digitize a polygon on the map and save it permanently. I
have 
> this working with AJAX viewer, but would like to port it to Fusion
> Has anyone succeeded to  do this ?
> 
> Stefan Dalakov
> 
> 
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> 

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