Delete JavaFX table row with delete key - javafx

Question

Is there a way to delete selected table row using keyboard delete key?
Is there any example with this implementation?

Answer 1

Sure you can. You only have to register an EventHandler and listen to the specific KeyCode. Following example is for TreeTableView but should be applyable for all TableViews.
treeTableView.setOnKeyPressed( new EventHandler<KeyEvent>()
{
#Override
public void handle( final KeyEvent keyEvent )
{
final TreeItem<YourObject> selectedItem = treeTableView.getSelectionModel().getSelectedItem();
if ( selectedItem != null )
{
if ( keyEvent.getCode().equals( KeyCode.DELETE ) )
{
//Delete or whatever you like:
presenter.onEntityDeleteAction( selectedItem );
}
//... other keyevents
}
}
} );

Answer 2

After trying a lot I managed to intercept and handle (with my application logic) the Delete key (Del or Canc, as you prefer to call it).
Thanks to some debugging I understand that the Delete key is identified with the Unicode code: \u007F.
So, the moment I type the key, I read the character and compare it with this code.
Here is a piece of my code that has nothing to do with table views but I used it for a TextField.
The important thing is the reasoning.
#FXML
public void myKeyListener(KeyEvent keyEvent) {
//Matches and manage TAB, Enter and Delete buttons
if ((keyEvent.getCharacter().equals("\t") ||
keyEvent.getCharacter().equals("\r") ||
keyEvent.getCharacter().equals("\u007F") //<-- **THIS** is the important one! *****
)) {
//My / your application logic
keyEvent.consume(); //The documentation says: "Marks this Event as consumed. This stops its further propagation."
return;
}
//Other logic...
//Entered only to have test outputs
System.out.println("getCode: " + keyEvent.getCode());
System.out.println("getCharacter: " + keyEvent.getCharacter());
System.out.println("getText: " + keyEvent.getText());
System.out.println("isMetaDown: " + keyEvent.isMetaDown());
}
Outputs:
getCode: UNDEFINED
getCharacter: ⍰
getText:
isMetaDown: false
I hope it can be useful to someone else. 🤞
P.S. I'm using Windows 10 with italian keyboard layout. In case it's relevant.