@Override
			public void keyPressed(KeyEvent e) {
				int keycode = e.getKeyCode();
				switch (keycode) {
					case KeyEvent.VK_TAB:
						if (e.isShiftDown()) {
							move(ComponentCellEditorListener.PREVIOUS);
						}
						else {
							move(ComponentCellEditorListener.NEXT);
						}
						e.consume();
						break;
					case KeyEvent.VK_DOWN:
						move(ComponentCellEditorListener.DOWN);
						e.consume();
						break;
					case KeyEvent.VK_UP:
						move(ComponentCellEditorListener.UP);
						e.consume();
						break;
					default:
						break;
				}
			}
ComponentCellEditor provides the editor for each editable field in a 
component of a composite data type.
Ghidra/Features/Base/src/main/java/ghidra/app/plugin/core/compositeeditor/ComponentCellEditor.java