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Using Combo as CellEditor - deselect value [message #1470332]

Wed, 12 November 2014 08:57

Björn Seebeck

Messages: 9
Registered: April 2012

Junior Member

How can I deselect a value (setting to null) in a combobox used as cell editor (non multi-select)?

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Re: Using Combo as CellEditor - deselect value [message #1470338 is a reply to message #1470332]

Wed, 12 November 2014 09:04

Dirk Fauth

Messages: 2902
Registered: July 2012

Senior Member

IIRC you need to add an empty value to the combo that can be selected. Or try to make an editable combo that allows to manually modify an entry in the text component

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Re: Using Combo as CellEditor - deselect value [message #1470366 is a reply to message #1470338]

Wed, 12 November 2014 09:25

Björn Seebeck

Messages: 9
Registered: April 2012

Junior Member

Hi Dirk, thanks for quick response.
Adding an empty entry would be anoying in our case, but I found a working solution for us by adding a key listener to Combo so the selection is set to null if user strikes DEL or BACKSPACE key:

		final ComboBoxCellEditor editor = new ComboBoxCellEditor(dataProvider) {
			@Override
			protected void addNatComboListener(final org.eclipse.nebula.widgets.nattable.widget.NatCombo combo) {
				super.addNatComboListener(combo);
				combo.addKeyListener(new KeyAdapter() {

					@Override
					public void keyPressed(KeyEvent event) {
						if (event.keyCode == SWT.DEL || event.keyCode == SWT.BS) {
							combo.setSelection(new String[] { "" });
						}
					}

				});
			}
		};

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