stop_im = getIcon(pm, "stop");
restart_im = getIcon(pm, "restart");
// Checkpoint
ib = new ImageButton(checkpoint_im, CHECKPOINT_L);
ib.addActionListener(cl);
ib.addMouseListener(mbl);
gbc.gridwidth = 1;
gbl.setConstraints(ib, gbc);
fspp.add(ib);
l = new Label(CHECKPOINT_L);