[klntsky]

I noticed that windows are resizable, but only change the size on mousedown, not on mousemove while the mouse is down.

Is that intentional? What are the benefits?

[jfe]

I compute the resized windows and columns on mouseup to imitate how the Acme text editor does resizing, but the event handler which computes the resize could very well be called on mousemove if preferred. Maybe it'd be worth adding that as a customization in the library interface.