Quote from: Qwerty.55 on February 25, 2011, 04:04:09 pm

DJ, yeah. The only program I've ever seen advertise "unlimited undos" was HxD, which has a much easier task of it than most programs because of how densely you can store hex.

What does this program do and how does it undo?

It's a hex editor, so it probably stores what you write in a buffer that's kind of like a .txt file. You could do the same with Input, although TI-Strings are much less efficient than ASCII.

 

Mind posting a screenie or some example code?

The problem is that the list can easily run thousands of bytes, and a compromise, while a great idea, would be a nightmare to implement. Add to that I'm already using Pic1....

Or all of the pics from this: http://www.ticalc.org/archives/files/fileinfo/391/39138.html

That many pics would require a lot of archiving/unarchiving or writing to Flash. The best way to undo, memory-wise, is if each undoes were like 1 digit of 1 byte each. But that's impossible in BASIC. In BASIC one list element is 9 bytes large. So basically 999 undoes creates a list close to over 9000 bytes large.

Hmm I am confused what you mean (besides the >9000), sorry. Could you rephrase?

I thought of that, but it could erase pixels that were drawn by multiple commamds. (Think Line(X1,Y1,X2,Y2,0))
@DJ_O I'm defensive in the extreme when it comes to programming (one of my programs only gives the user 4 tries to give valid input. There's  a cap on the number of tries not to insult the user, but to avoid my error message being displayed wrong.)