[udig-devel] dpi issues

[Jody Garnett]

Vince Darley wrote:
> I notice from the mailing list that Jody wrote this in December:
>> As we cranked up the DPI on our PDF export functions the text, and the
>> scalebar started getting smaller and smaller.
>>
>> I have added a couple of methods to ViewportGraphics interface:
>> - getDPI()
>> - setFont( font )
>>
>> The font provided is an AWT Font; with getSize() expressed in "points"
>> (according to the the javadocs that is assumed to be 72 dpi).
> Is this supposed to have fixed the "the text, and the scalebar started 
> getting smaller and smaller." problem?  I still see that same problem 
> when I adjust the dpi.  (I'm using ApplicationGIS.drawMap()).
I was not aware of that problem; I was generating a PDF myself - I *did* 
preprocess my map and adjust all the Scales and Font sizes in the 
GeoTools Style objects (since they are expressed in pixels it needed to 
be done).

There is a RescaleStyleVisitor documented here:
- 
http://docs.codehaus.org/display/GEOTDOC/08+StyleVisitor+use+with+DuplicatingStyleVisitor+and+RescaleStyleVisitor

I am not sure how "smart" we want ApplicationGIS.drawMap() to be? Making 
getDPI available allowed the scalebar and other map graphics to know 
what was going on and adjust accordingly, the BasicFeatureRenderer still 
made use of the Style as provided (I preprocessed the Style to make it 
show what I wanted).

Jody