p=plot(None)[0]

import ch.psi.pshell.plot.RangeSelectionPlot as RangeSelectionPlot
import org.jfree.ui.RectangleAnchor as RectangleAnchor
import org.jfree.ui.TextAnchor as TextAnchor

def plot_psss(p):
    """
    if len(p.getMarkers())==0:
        m1=p.addMarker(0,None,"",Color.WHITE)
        m2=p.addMarker(0,None,"",Color.WHITE)
        m2.setLabelAnchor(RectangleAnchor.TOP) 
    else:
        m1,m2 = p.getMarkers()
    """
    if len(p.getMarkers())==0:
        m=p.addIntervalMarker(0,0, None,"", RangeSelectionPlot().getSelectionColor())    
        m.setLabelAnchor(RectangleAnchor.BOTTOM) 
    else:
        m = p.getMarkers()[0]
        
    x,y = frange(0,40,1.0), frange(100,180,2.0)
    if (x is None) or (y is None):
        p.getSeries(0).clear()
    else:
        p.getSeries(0).setData(x,y)  
        
    #m1.value, m2.value=  psss_center.take() - psss_fwhm.take(), psss_center.take() + psss_fwhm.take()
    #m2.label = str(psss_center.take())   

    m.startValue, m.endValue =  10.0, 20.0
    m.label = str(15.0)      
    
    
while True:
    plot_psss(p)
    time.sleep(1.0)