Detecting changes

Question

hi folks,
I have a swing application that has a functionality to save the input. I want to know what is the common way to detect modification of input. If there's modification, i want to prompt the user to save if he/she is closing down the app. I'm thinking about using a listener on all input components(JTextField, JList, JComboBox,JTable,JButton). But the listener would be different for each type of component, ActionListener for JButton, CaretListener for JTextField, ListSelectionListener for JList, ect. So I want to write a class that implements all these Listeners, and if any of those events is triggered, then I know there's modification been made.
My question is: is there a better/more efficient/more elegant way of detecting changes in my app?
If not, any comments on my approach?
thanks!!

Answer 1

You can write an unique class implementing DocumentListener, ActionListener, ItemListener, etc..
But you still have to add the listener to all the components.
I'm thinking you can write a method void register(JComponent pane) Depending on the class JTextField,JCheckBox, etc... you add the class as a DocumentListener,
as an ActionListener, etc. If the component is a container, you can recursively invoke the method
for all the children