todo.txt

* A wizard to help create .spec files
* Unit tests
* Proper logging
* Validation for edge cases (missing / bad .spec files, missing directories, etc.)
* Permit spec files to exist in subdirectories
* Permit sheet spec files to include an offset into the image for the grid
* Permit sheet spec files to include absolute image coordinates, instead of the implied grid
* Horizontal scrolling for preview
* Find a better GUI toolkit than tkinter, because this is causing a lot of problems with really basic things like scrolling frames, fluid layouts, native widgets, etc.
* Permit arbitrary ordering of frames for the final animation.  E.g. it's common for a 4-frame animation to be stored with only 3 frames, ordered as "1,2,1,3".  This would permit the output to be smaller by one frame.