Undo group of commands

[mskr]

This is useful when you have many little changes.

For example the user might move a graphical object by drag and drop.

The user would not want to undo every pixel-sized change.

I would like to be able to group some commands, that the user can undo at once.

If the project is still active I would gladly submit a pull request.

[jzaefferer]

If you don't want to track each pixel, how about only adding the result (not the intermediate steps) to the stack?

[mskr]

Hi nice to hear from you!

I think I understand that you want to keep the library small and clean.

However, user-code in Undo.Stack.changed function might want to update the view for every pixel-sized change. At least this is how my code does it at the moment.

I would have to call my update view function elsewhere and add logic to only update the stack for every x pixels...

And I just wondered if the library should be able to help with this use case :)

For extra context: My app is in WebGL and therefore updates view manually.

If you think it is a good idea I will make the PR, but first I would like to merge #11

[jzaefferer]

Thanks for the context, that helps! Seems reasonable to add that to the library!