I've got a little notepad application of my own developed in Java.
I want to register when the file I'm editing in it is modified to warn
the user about a file modified without saving before
closing the file.
I use a key listener and when I detect a key pressed in my editor I set
the corresponding variable registering the
modification.
However, there are certain key pulsations that don't modify really the
file; for example, <CTRL-C>, so when I copy a
piece of text, it's registered a file modification, even if I don't
paste it there (but in other application).
How can I detect if the key pressed modifies really the text?. (Or, how
can I detect if the pressed key is, for example <CTRL-C>?).
Here is my piece of code:
boolean file_modified = false;
JTextArea editor = new JTextArea();
editor.addKeyListener(new KeyAdapter()
{
public void keyTyped (KeyEvent e)
{
file_modified = true;
}
}
);
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