Dave,
You're pretty much out of luck. I ran into a similar problem - I wanted
the user to be able to create an editable region-of-interest on an
image, and while GeneralPath works great in supporting line and curve
segments, there is no way to modify these segments.
Sun indicates that this will likely not change (see
http://developer.java.sun.com/developer/bugParade/bugs/4190814.html),
but there is a possibility of a new object appearing some time in the
future. For now, you're stuck creating new GeneralPath objects whenever
you need to modify a segment!
Hope this helps...
-Yawar
-----Original Message-----
From: Dave Searle [mailto:[EMAIL PROTECTED]]
Sent: Thursday, December 09, 1999 5:12 PM
To: [EMAIL PROTECTED]
Subject: [JAVA2D] How to alter curves in a GeneralPath?
I am trying to create a path editor (like the pen tool in Photoshop).
Anyway I have been storing the coordinates of the QuadCurves in Vectors
and
then creating the curves to display them. This seems to be working fine.
However I have discovered the GeneralPath class and am wondering if this
is
what I should be using. It gives me all the functionality I need except
for
one, there seems to be no way to change any of the coordinates. Once I
have
added a curve to the GeneralPath I can not seem to modify it if a user
moves a control point of a curve for example. Is there a way to do
this?
Is the GeneralPath class only for display and not for general storage
and
manipulation of curves?
I suppose one way I could do it is to read in the GeneralPath segment by
segment, modify the data and then create a new GeneralPath. But it seems
a
bit of a waste when all I want to do is to change two numbers (the user
can
drag a curve and watch it change so doing it this way might slow it
down).
I am quite new to Java2D so I may be missing something simple. I dont
mind
using my own storage mechanism but it just seems like that is what
GeneralPath is for. It also supports multiple subpaths etc which I will
need to have.
Any ideas appreciated.
Cheers Dave
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