public DragLine createSelector(final String id, final ConstantMap[] color) throws Exception {
if (id == null) throw new NullPointerException("selector id cannot be null");
if (color == null) throw new NullPointerException("selector color cannot be null");
if (selectors.containsKey(id)) return selectors.get(id);
DragLine selector = new DragLine(this, id, color, initialRangeY);
selector.setHydraControl(displayControl);
selector.setSelectedValue(waveNumber);
selectors.put(id, selector);
return selector;
}
public DragLine removeSelector(final String id) {
DragLine selector = selectors.remove(id);
if (selector == null) return null;
selector.annihilate();
return selector;
}
public void setSelectorValue(final String id, final float value)
throws VisADException, RemoteException {
DragLine selector = selectors.get(id);
if (selector != null) selector.setSelectedValue(value);
}
public float getSelectorValue(final String id) {
DragLine selector = selectors.get(id);
if (selector == null) return Float.NaN;
return selector.getSelectedValue();
}