Thanks guys ... the digitizing code has changed in the upcoming 2.0
release to use the OpenLayers vector library rather than our home-
grown canvas implementation so we'll make sure there is a way to clean
up after digitizing ...
Mike, can you take a skim through this thread and make sure the new
Vector implementation has a method for cleaning up, or implicitly
cleans up if possible.
Cheers
Paul
On 29-Jan-09, at 6:14 PM, Mark Pendergraft wrote:
thanks!
I'll take a look at it later tonight.
-Mark
-----Original Message-----
From: [email protected]
[mailto:[email protected]] On Behalf Of Rodolfo
Moreno
Sent: Thursday, January 29, 2009 3:02 PM
To: [email protected]
Subject: RE: [mapguide-users] Fusion and Digitizing
Hi Mark, I have gotten to clear the digitized polygons in FUSION
viewer
by
modifying the MapGuideViewerapi.js
var polDigitizer;
function DigitizePolygon(handler) {
if (handler) {
var Fusion = window.top.Fusion;
var mapWidget = Fusion.getWidgetById(mapWidgetId);
var digitizer = new Fusion.Tool.Canvas.Polygon(mapWidget);
digitizer.mouseDown = MultiPointHandlers.prototype.mouseDown;
digitizer.mouseMove = MultiPointHandlers.prototype.mouseMove;
digitizer.dblClick = MultiPointHandlers.prototype.dblClick;
Object.inheritFrom(digitizer, Fusion.Tool.Canvas.prototype, []);
digitizer.handler = handler;
digitizer.activateCanvas();
polDigitizer = digitizer;
//add a listener to update the position of the features
var mapWidget = Fusion.getWidgetById(mapWidgetId);
mapWidget.registerForEvent(Fusion.Event.MAP_EXTENTS_CHANGED,
extendEvtResponse );
}
}
function extendEvtResponse(){
var digitizer = polDigitizer;
digitizer.updatePx();
digitizer.clearContext();
digitizer.draw(digitizer.context);
}
function clearPol(){
polDigitizer.clearContext();
var Fusion = window.top.Fusion;
var mapWidget = Fusion.getWidgetById(mapWidgetId);
mapWidget.deregisterForEvent(Fusion.Event.MAP_EXTENTS_CHANGED,
extendEvtResponse);
polDigitizer.deactivateCanvas();
}
In your main page you must call to clearPol() function in order to
clear
the
digitized polygon. For the other shapes I guess that the logic is the
same.
The above code only clears the last polygon digitized. It's
necessary to
manage an array of digitizers for controlling all digitized
polygons. I
haven't had time for trying it.
I have tested with mapguide 2.0.1 with FUSION 1.0.6 in IE7 and FF2
maybe you can improve it.
Regards,
GordonL wrote:
Hi Mark,
I know what you mean about the sticky digitizing... I was told to
look
at
the
resetCanvas function in the Measure.js file to get rid of that
leftover
digitize graphics...but I haven't tried it yet...
gordon
Mark Pendergraft wrote:
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: [email protected]
[mailto:[email protected]] On Behalf Of GordonL
Sent: Thursday, January 29, 2009 1:20 PM
To: [email protected]
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: [email protected]
[mailto:[email protected]] 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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--
View this message in context:
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-----
Rodolfo Moreno
CivilEng
--
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