ScrollingGraphWidgetPyQtGraph.py

from GraphWidgetPyQtGraph import Graph_PyQtGraph as Graph
from PyQt4 import QtGui, QtCore

class ScrollingGraph_PyQtGraph(Graph):
    def __init__(self, name, reactor, parent = None, ylim=[0,1], cxn=None):
        super(ScrollingGraph_PyQtGraph, self).__init__(name, reactor, parent)
        self.set_xlimits([0, 100])
        self.pointsToKeep = 100

    def update_figure(self, _input = None):
        for ident, params in self.artists.iteritems():
            if params.shown:
                try:
                    index = params.index
                    x = params.dataset.data[:,0]
                    y = params.dataset.data[:,index+1]
                    params.artist.setData(x,y)
                except:
                    pass
                
            
        try:
    	    mousepressed =  QtGui.qApp.mouseButtons()
    	    if (mousepressed == QtCore.Qt.LeftButton) or (mousepressed == QtCore.Qt.RightButton):
                return 
                # see if we need to redraw
            xmin_cur, xmax_cur = self.current_limits
            x_cur = x[-1] # current largest x value
            window_width = xmax_cur - xmin_cur
            # scroll if we've reached 75% of the window
            if (x_cur > (xmin_cur + 0.75*window_width) and (x_cur < xmax_cur)):
                shift = (xmax_cur - xmin_cur)/2.0
                xmin = xmin_cur + shift
                xmax = xmax_cur + shift
                self.set_xlimits( [xmin, xmax] )
        except:
            pass