Undo

[freesoft_2000]

Hi everyone,

I am trying to add an undo listener to a jtable but could
not get it to work. Does anyone know how to add a undo function to a jtable
assuming the default cell editor component is a jtextfield?

A small code sample would be helpful

Any help is greatly appreciated

Thank You

Yours Sincerely

Richard West

 

[Oscar kind]

I am trying to add an undo listener to a jtable but could
not get it to work. Does anyone know how to add a undo function to a jtable
assuming the default cell editor component is a jtextfield?

AFAIK, JTable, JTextField and the other Swing components do not support
undo by themselves. This means that you'll need to keep a stack of past
values, and reinsert those values when a specific action is triggered.

Thus you need:
- A (limited) stack of past values or changes
- A ChangeListener that pushes records on this stack for all changes
- An ActionListener that pops records from the stack and undoes changes

The ChangeListener is tied to all components that may be undone; the
ActionListener is tied to the undo button (or menu item, ...).

 

[Thomas Weidenfeller]

AFAIK, JTable, JTextField and the other Swing components do not support
undo by themselves. This means that you'll need to keep a stack of past
values, and reinsert those values when a specific action is triggered.

http://java.sun.com/j2se/1.5.0/docs/api/javax/swing/undo/package-summary.html

/Thomas