[wxperl-users] Pattern for update forms

[Johan V. <jvr...@sq...>]

Hi,

Given a form with data (in text widgets, checkboxes, and so on). This
data comes from a database. On the form, the user can make changes. On
the bottom there are the familiar buttons Cancel, OK and Reset.

I need to keep track of changes. In particular, I need to know if
anything changed from the start. If so, I can enable the OK and Reset
buttons. If nothing has changed, these are disabled (again).

My usual approach is to make a copy of all data when the form is first
filled, and use the idle loop to compare all fields to see if
something has changed. This works, but I assume there are better ways.

What would be a good pattern for this? Listen to focus in / focus out
events? How do you do this?

-- Johan