Title: Undo function
Post by: beaujob on October 28, 2001, 12:40:29 AM
Post by: beaujob on October 28, 2001, 12:40:29 AM
Since CL's got a way to store the last step, then all they need to do is make a dropout stack of that data structure. It's very easy. Just have a static array, and pretend it's a ring, then keep a pointer to the most recent step. As you undo/redo, you can move the pointer backwards and forwards. You also keep a pointer to the tail so you know when you've gotten to the bottom of possible undoing. This is something they teach every sophomore CS student. (like me last year.) :P
Title: Undo function
Post by: Phonyboy on October 16, 2001, 09:46:07 PM
Post by: Phonyboy on October 16, 2001, 09:46:07 PM
I could need an Undo button.... really! You too?
Title: Undo function
Post by: baggio on October 28, 2001, 04:36:28 AM
Post by: baggio on October 28, 2001, 04:36:28 AM
Quote: from beaujob on 7:40 pm on Oct. 27, 2001
... Just have a static array, and pretend it's a ring, then keep a pointer to the most recent step. As you undo/redo, you can move the pointer backwards and forwards....Sounds a lot like a circular queue ;)This is something they teach every sophomore CS student. (like me last year.) :PThey also keep teaching it to 5th year EET seniors like me. Not so much that they keep reteaching it, but we keep using it in our projects.
... Just have a static array, and pretend it's a ring, then keep a pointer to the most recent step. As you undo/redo, you can move the pointer backwards and forwards....Sounds a lot like a circular queue ;)This is something they teach every sophomore CS student. (like me last year.) :PThey also keep teaching it to 5th year EET seniors like me. Not so much that they keep reteaching it, but we keep using it in our projects.
Title: Undo function
Post by: Micha on October 28, 2001, 01:47:31 PM
Post by: Micha on October 28, 2001, 01:47:31 PM
yeah, great idea, would love to see it implemented
Title: Undo function
Post by: on October 16, 2001, 10:04:21 PM
Post by: on October 16, 2001, 10:04:21 PM
There is one, I've used it many times. Over on the right, above 'Clear'.
:-)
(Edited by Chillum at 3:16 pm on Oct. 16, 2001)
Title: Undo function
Post by: Andy24 on October 28, 2001, 04:30:05 PM
Post by: Andy24 on October 28, 2001, 04:30:05 PM
I hate it when I need to keep changing forward and backwards to delete things. it would be nice if I could just use the undo.
Title: Undo function
Post by: Phonyboy on October 16, 2001, 10:07:22 PM
Post by: Phonyboy on October 16, 2001, 10:07:22 PM
drats... I guess I shouldn´t have started to post here before actually checking out the full version which I downloaded some minutes ago ;-)
Title: Undo function
Post by: Entroper on October 28, 2001, 06:15:54 PM
Post by: Entroper on October 28, 2001, 06:15:54 PM
It's not really a queue, since the order you take things out is like a stack. It's basically a stack that overwrites the bottom elements after a certain number of elements are in it. 
I think it would be pretty cool to have multiple undo layers.
I think it would be pretty cool to have multiple undo layers.
Title: Undo function
Post by: pasqualz on October 17, 2001, 06:39:34 PM
Post by: pasqualz on October 17, 2001, 06:39:34 PM
Hey no problem, we all have had one time when the answer is staring us in the face and we don't see it ;-)
Title: Undo function
Post by: beaujob on October 25, 2001, 07:22:49 PM
Post by: beaujob on October 25, 2001, 07:22:49 PM
Though, it's good that he mentions the Undo button. I would like to see a deeper undo stack. Perhaps keep track of the last 10-20 operations? Sometimes you make two mistakes in a row before you realize that the first mistake even happened.
Title: Undo function
Post by: pulsejet5 on October 27, 2001, 11:28:18 PM
Post by: pulsejet5 on October 27, 2001, 11:28:18 PM
multiple undo buttons is a great idea but it would also be useful to have a redo button
Title: Undo function
Post by: on October 28, 2001, 12:30:32 AM
Post by: on October 28, 2001, 12:30:32 AM
Both would definately help, and should be easy enough to implement I would've thought.