pyqtgraph update issues

gistfile1.txt

class MainWindow(QtGui.QMainWindow):
	"""  init Qt and draw stuff """
	def __init__(self, parent=None):
		super(MainWindow, self).__init__(parent)
		self.resize(1000,600)
		self.setWindowTitle('pyqtnia-alpha')
		area = DockArea()
		self.setCentralWidget(area)
		dock1 = Dock("one", size=(150,550), hideTitle=True) 
		dock2 = Dock("", size=(700,550), hideTitle=True)
		dock3 = Dock("", size=(150,550), hideTitle=True)
		dock4 = Dock("", size=(1000,20), hideTitle=True)
		area.addDock(dock1, 'top')     
		area.addDock(dock2, 'right')
		area.addDock(dock3, 'right')
		area.addDock(dock4, 'bottom')
		#self.app = QtGui.QApplication([])
		#self.app.setGraphicsSystem('opengl')
		g = gl.GLGridItem()
		g.scale(2,2,1)
		g.setDepthValue(10)  # draw grid after surfaces since they may be translucent
		w1 = gl.GLViewWidget()
		w1.setCameraPosition(distance=50)
		"""
			in the next sequence there needs to be an update thread created
			so that the plot will display the new values from the NIA
		"""
		milliseconds = 50
		nd = NiaData(milliseconds)
		fourier = nd.fourier()
		#qoutput = fourier(qoutput)
		#self.fingers = self.fourier(getattr(fingers))
		Fourier_Data = nd.Fourier_Data
		print(Fourier_Data)
		#print(qoutput)
		#test_text = self.nd(self, getattr(self.nd.Fourier_Data))
		#w1.addItem(QtGui.QGraphicsTextItem.mapFromItem(Fourier_Data))
		
		text_area = QtCore.QTextStream()
		#text_holder = gl.GLViewWidget.renderText(x=1.0, y=1.0, z=0.0, qoutput)
		#convert = (QtGui.QGraphicsTextItem.mapFromItem(qoutput))
		phase = 0.
		pos3 = np.zeros((100,100,3))
		pos3[:,:,:2] = np.mgrid[:100, :100].transpose(1,2,0) * [-0.1,0.1]
		pos3 = pos3.reshape(10000,3)
		#pos3 = Fourier_Data
		d3 = (pos3**2).sum(axis=1)**0.5
		sp3 = gl.GLScatterPlotItem(pos=pos3, color=(1,1,1,.3), size=0.1, pxMode=False)
		w1.addItem(g)
		w1.addItem(sp3)
		dock2.addWidget(w1)
	def updater():
		## update surface positions and colors
		global sp3, d3, pos3, phase
		phase = -0.1
		z = -np.cos(d3*2+phase)
		pos3[:,2] = z
		color = np.empty((len(d3),4), dtype=np.float32)
		color[:,3] = 0.3
		color[:,0] = np.clip(z * 3.0, 0, 1)
		color[:,1] = np.clip(z * 1.0, 0, 1)
		color[:,2] = np.clip(z ** 3, 0, 1)
		sp3.setData(pos=pos3, color=color)

	def dataCollector(self):
		"""
			this function will send data to a database
		"""
		pass



def begin():
	milliseconds = 50
	nia = NIA()
	nia_data = NiaData(milliseconds)
	data_thread = threading.Thread(target=nia_data.get_data)
	data_thread.start()
	t = QtCore.QTimer()
	t.timeout.connect(MainWindow.updater())
	t.start(milliseconds)

if __name__ == '__main__':
	import sys
	# open the NIA, or exit with a failure code
	nia = NIA()
	if not nia.open():
		sys.exit(1)


	begin()

	# milliseconds = 50
	# nia_data = NiaData(milliseconds) 
	# start data collection thread
	# kick-off processing data from the NIA

	#plot1_data()

	app = QtGui.QApplication(sys.argv)
	window = MainWindow()
	window.show()
	app.exec_()
	app.quitOnLastWindowClosed()