[Grace-core] Objectdraw library for graphics in Grace

[Kim Bruce]

I've ported the objectdraw library from Java to Grace, built on top of gtk+.  I've attached a document describing the current state of the library.  There are also links in the document to the library files and to sample programs.

Feedback would be gratefully welcomed, especially about the API design.  Once the timer features are added to the gtk+ features available in Grace I'll add examples of programs using animations.

I consider the design to be preliminary at this point.  There are a couple of points of awkwardness resulting from (known) unresolved problems with initialization and inheritance and similar issues.  I also may want to make some changes after experimenting adding real buttons and other GUI components in windows along with the canvas.

Kim


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