RE: OpenMap, JNI, and C++

Isn't that funny, I spent this morning surfing for ways to integrate
an OpenMap into a Visual C++ app.

I didn't come up with much. Two options that I am considering are

 1. use an IE as Active X control and show OpenMap applet inside

 2. use Adobe's SVGA Active X viewer, some XSL stylesheets that
    convert GML to SVGA, and Castor to turn OpenMapinto a GML
    server.

I don't like either option. Given that they both basically use the
same approach (an Active X control that must be installed on the
client), I'll probabaly pursue the first option to see how far I get.

Here are some links I found about turning a Java object into a COM
object. I got scared off by the prospect of DLL/SDK/VM hell on
the client. If you have tight control of the client configuration,
that might be the way to go.

http://www.javaworld.com/javaworld/javatips/jw-javatip17_p.html

http://www.idevresource.com/com/library/articles/javacom.asp

http://www.microsoft.com/java/resource/java_com.htm

I guess another possible solution is to have openmap generate an
image, and create a v++ control that emulates an image map. That
removes the complexity from the client, but limits functionality.

--
Mark Bucciarelli    Peregrine Systems, Inc.       R&D, Boston
(413) 253-0020      mbucciarelli@peregrine.com    Yahoo: m_bucciarelli
http://www.peregrine.com 
> -----Original Message-----
> From: John Mairs [mailto:mairsj@oso.nrl.navy.mil]
> Sent: Friday, June 08, 2001 10:36 AM
> To: openmap-users@bbn.com
> Subject: OpenMap, JNI, and C++
> 
> 
> Hi Folks,
> 
> I have a requirement to add digital maps (CADRG format) to a C++
> application.  Although the app is developed using Microsoft 
> DevStudio 6.0 we
> DO NOT use any MFC or WIN32 calls.  Were using a 3rd party 
> graphical library
> by RogueWave called zApp.  Unfortuneately zApp is no longer 
> supported.  zApp
> only knows a few primitives: lines, points, bitmaps.  We are 
> also using a
> GIS called Hipparchus by geoddyssey.com.  Hipparchus does not 
> know about
> maps per say but it knows all about projections, locations, etc.  We
> actually wrote the code to display all the lines making up political
> boundaries, rivers, etc for our map display.  We used NIMA's 
> vmap lvl-0.  
> 
> Enter digital maps.  Seems like I have a couple of options:
> 
> 1. Try and find C++ code to display digital Compressed ARC 
> Digitized Raster
> Graphics and add it to our other code that knows how to draw things.  
> 
> 2. Swap out Hipparchus and zApp and use something like ESRI's 
> Map Objects.
> 
> 3. Swap out Hipparchus and zApp and try and use JNI to 
> communicate between
> C++ objects and OpenMap.  Or use JNI to just use the CADRG classes.
> 
> I'm going out tonight to buy "The JAVA Native Interface" by 
> Shen Liang.
> I've only taken a couple of JAVA courses so this outta be some fun.  
> 
> Any success or failure stories about "linking" OpenMap to an already
> established C++ application?
> 
> Thanks,
> 
> John Mairs
> 
> (703) 808-6788
> 
> 
> p.s. I previously sent this to openmap@bbn.com 
> 
> 
> 
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