/** Draw the item {@inheritDoc} */
@Override
public void paintControl(final PaintEvent e) {
final Display display = getDisplay();
final GC gc = e.gc;
final Rectangle bounds = getBounds();
last_alarm_state = item.getSeverity();
gc.setBackground(color_provider.getColor(last_alarm_state));
gc.fillRoundRectangle(0, 0, bounds.width, bounds.height, 10, 10);
gc.setForeground(display.getSystemColor(SWT.COLOR_WIDGET_BORDER));
gc.drawRoundRectangle(0, 0, bounds.width - 1, bounds.height - 1, 10, 10);
// Draw Text
gc.setForeground(display.getSystemColor(SWT.COLOR_BLACK));
final String label = item.getName();
final Point extend = gc.textExtent(label);
gc.drawString(label, (bounds.width - extend.x) / 2, (bounds.height - extend.y) / 2, true);
}
/** If the alarm tree item has changed since the last redraw, refresh the display. */
public void updateAlarmState() {
if (item.getSeverity().equals(last_alarm_state)) return;
redraw();
}