Re: [udig-devel] Shapefiles

Tue, 14 Mar 2006 11:08:19 -0800 

Ok so a change of plans.
I've changed the API slightly. Shouldn't bother you too much, all the information is still there in the IDropAction class, now I've added the getEvent() method to the IDropAction class. It has the x,y location of the event. 


I think I've cleaned things up a little so you shouldn't have to  
worry about any other classes besides the IDropAction (before the  
UDIGDropHandler was accessible from the IDropAction)  I've changed  
that but made sure that all the information is still available in the  
IDropAction.



Jesse

On 14-Mar-06, at 9:33 AM, Jesse Eichar wrote:


Truthfully this is a good question.  I think you've identified  
another short coming of this API.  I am going to make 3 changes to  
UDIGDropHandler.



1.  I'm going to change getLocation to return a Point which will be  
the x,y coordinates of the drop event relative to the component  
that the component is dropped on.
2.  I'm going to add the method getViewerLocation() that will  
return ON, BEFORE and AFTER locations.  (That is what getLocation()  
currently does)
3.  I'm going to add a method isViewer() so you can determine if  
the control is a viewer and if you should use getViewerLocation()  
or getLocation().


You'll have to download tonights nightly build.


(Sorry for the hard time you are having but DND has been a real  
headache for me to figure out, never mind do right)


Jesse

On 14-Mar-06, at 2:19 AM, M.S.Bachler wrote:


Hi

Sorry about yesterdays rant.


If you have not lost all patients with me, I would really  
appreciate it
if anyone could tell me how I get the x, y coordinates of the drop  
from

my IDropAction class.

Thanks

Michelle

-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of
M.S.Bachler
Sent: 13 March 2006 11:04
To: User-friendly Desktop Internet GIS
Subject: RE: [udig-devel] Shapefiles


Hi!

Thanks everyone for your various inputs.

I am still not sure what I am doing (I have decided I am just  
thick!).



I can't see how the DataUtility way or creating a FeatureType  
passes in
the x,y of the point. Then again, I can't even figure out how I  
get the

x, y coordinates of the drop from my IDropAction class in order to
create the coords for my Point class in the first place? I have run
around the API, but can't figure it out.

Is there really no example code out there that I can study to help me

understand things better. I am unable to download the source code  
with

Subversion (I did write to the list about this but no one replied). I
need the equivalent of "uDig for Dummies" book.

Being a Java developer for many years I thought this project would be

relatively easy. But I think having no familiarity with Eclipse or  
GIS

at all, has really not helped me. While Eclipse is becoming more

familiar, 'GIS speak' is still a mistery. I think what seems  
obvious to

many of you when talking about the code, just escapes me.

I know people are reluctant to spoon feed me the code I need.

I know I need to go through the pain barrier and try and  
understand it
all myself. But it really hurts, and for various reasons the  
timescale
of my project has been shrunk, and I am in danger (for the first  
time in
my lief!), of not completing something, and having to say I can't  
do it.


I think I have just not reached that eureka moment, when everything

suddenly clicks into place. I hope it happens soon! I still have a  
head

full of floating jigsaw pieces.


Meanwhile, if someone could help me with how I get the x,y of the  
drop,

that would be great.


Michelle - ( with a heavy cold - feeling rather sorry for myself :- 
( -

going to get a cup of tea )

-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Jody
Garnett
Sent: 11 March 2006 08:58
To: User-friendly Desktop Internet GIS
Subject: Re: [udig-devel] Shapefiles



You guys are working to hard, I wrote a parser method I never  
wanted to

do this stuff twice.
-

http://udig.refractions.net/docs/api-geotools/org/geotools/data/ 
DataUtil

ities.html

The format is silly, but it is in the javadocs:
-

http://udig.refractions.net/docs/api-geotools/org/geotools/data/ 
DataUtil

ities.html#createType(java.lang.String,%20java.lang.String)

basically: "name:String,age:Number,position:Point,*destination:Point"
Where the * indicates the default geometry ..

Other useful stuff:
-

http://udig.refractions.net/docs/api-geotools/org/geotools/feature/ 
Featu

reTypes.html

Jody



M.S.Bachler wrote:


Hi!

Silly question.

Earlier you helpfully gave me a code snippet to create a new
shapefile.

IndexedShapefileDatastoreFactory fac=new
IndexedShapefileDataStoreFactory();

ShapefileDataStore ds=fac.createDatastore(url);


// I assume this is the URL of the new shapefile I want it to  
create?


GeometryFactory gf = new GeometryFactory();

ds.createSchema( featureType );


// Here I got lost. Started to investigate FeatureType and felt  
like

I was walking through tar.


I did some stuff with FeatureType the other day... trying to  
create a

new Feature from scratch. Here is the code I found to create a new
FeatureType:
                    AttributeType geomAttr =

AttributeTypeFactory.newAttributeType("the_geom", LineString.class);

                    FeatureType ftRoad =

FeatureTypeBuilder.newFeatureType(new AttributeType[] {geomAttr},
"road");


    //                WKTReader wktReader = new WKTReader();
    //                Point geometry = (Point) wktReader.read("POINT

(" + lat + " " + lon + ")");

                    GeometryFactory geomFactory = new

GeometryFactory();

                    LineString geometry =

geomFactory.createLineString(coords);

                    Feature theRoad = ftRoad.create(new Object[]
{geometry}, "myRoad");


This example Feature only has one attribute which is the geometry,
the_geom. You can create and add other attributes in the
AttributType[] and Object[] if needed.

These classes are from the org.geotools.feature package.

Hopefully you may find this useful. I'm not sure if this is the most
up-to-date way of doing it, but it worked for me.

Mark

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_______________________________________________
User-friendly Desktop Internet GIS (uDig)
http://udig.refractions.net
http://lists.refractions.net/mailman/listinfo/udig-devel
_______________________________________________
User-friendly Desktop Internet GIS (uDig)
http://udig.refractions.net
http://lists.refractions.net/mailman/listinfo/udig-devel
_______________________________________________
User-friendly Desktop Internet GIS (uDig)
http://udig.refractions.net
http://lists.refractions.net/mailman/listinfo/udig-devel


_______________________________________________
User-friendly Desktop Internet GIS (uDig)
http://udig.refractions.net
http://lists.refractions.net/mailman/listinfo/udig-devel


_______________________________________________
User-friendly Desktop Internet GIS (uDig)
http://udig.refractions.net
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