How to trap the first key?

Question

Hello World,
I am using JTable in that I am using custom TextField as a Editor Component. Now I want to trap the first key pressed in the textfield.
I am using public boolean editCellAt(int row,int column,EventObject e) method. In this method I get the value of �e� as a null if I press any key. So I can not trap the event here.
The next try is to putting KeyListener in textfield class, this is also not working because it gets called after EditCellAt method.
I tried to override the processKeyBinding() method but this seems to trap all the key pressed and not allow me to navigate also.
Can anybody provide me the solution how I can trap the first key only.
Thanks in advance,
Sachin Dare.

Answer 1

Hello World,
I am using JTable in that I am using custom TextField
as a Editor Component. Now I want to trap the first
key pressed in the textfield.what do you want it for?
[.. usual l aproaches snipped ]
The reason this is not working is that JTable uses a very uncommon way to route this first keyEvent: it comes via Jtable.processKeyBindings which first tries to start the edit with it (buggily "forgetting" to pass the keyEvent along...) and if this started the edit it will pass both keyStroke and keyEvent to the editorComponent's processKeyBindings. At his time the editorComponent is part of the container hierarchy.
So a possible solution (did not try it, though) might be to have a ComponentListener on the editorComponent, set a flag when being added to the table and reset the flag when receiving the first KeyStroke in proocessKeyBinding after the componentEvent. Alternatively, you might try to set/reset the flag as a clientProperty in table.processKeyBindings.
Greetings
Jeanette