public void itemStateChanged(ItemEvent e) {
				view.getViewer().setNavigationMode(e.getStateChange() == ItemEvent.SELECTED);
				if (view.getViewer().getNavigationMode()) {
					if (!view.getViewer().getPerspectiveDepth()) {
						JOptionPane.showMessageDialog(JOptionPane.getFrameForComponent(MolecularContainer.this), "Perspective depth is required for the navigation mode. It will be turned on.");
						view.getViewer().setPerspectiveDepth(true);
					}
				}
				else {
					view.setCameraAtom(-1);
				}
				view.repaint();
			}