import numpy as np
import pyqtgraph as pg
from pyqtgraph.Qt import QtGui, QtCore
from pyqtgraph.Point import Point
class OtherWindow(QtGui.QMainWindow):
def __init__(self):
QtGui.QMainWindow.__init__(self)
win = pg.GraphicsLayoutWidget()
sa =
QtGui.QScrollArea()
sa.setWidgetResizable(True)
sa.setWidget(win)
self.setCentralWidget(sa)
self.setWindowTitle("Plotting")
label = pg.LabelItem(justify='right')
win.addItem(label)
p1 = win.addPlot(row=1, col=0)
p2 = win.addPlot(row=2, col=0)
region = pg.LinearRegionItem()
region.setZValue(10)
p2.addItem(region, ignoreBounds=True)
p1.setAutoVisible(y=True)
data1 = 10000 + 15000 *
pg.gaussianFilter(np.random.random(size=10000), 10) + 3000 *
np.random.random(size=10000)
data2 = 15000 + 15000 *
pg.gaussianFilter(np.random.random(size=10000), 10) + 3000 *
np.random.random(size=10000)
p1.plot(data1, pen="r")
p1.plot(data2, pen="g")
p2.plot(data1, pen="w")
def update():
region.setZValue(10)
minX, maxX = region.getRegion()
p1.setXRange(minX, maxX, padding=0)
region.sigRegionChanged.connect(update)
def updateRegion(window, viewRange):
rgn = viewRange[0]
region.setRegion(rgn)
p1.sigRangeChanged.connect(updateRegion)
region.setRegion([1000, 2000])
#cross hair
vLine = pg.InfiniteLine(angle=90, movable=False)
hLine = pg.InfiniteLine(angle=0, movable=False)
p1.addItem(vLine, ignoreBounds=True)
p1.addItem(hLine, ignoreBounds=True)
vb = p1.vb
def mouseMoved(evt):
pos = evt[0] ## using signal proxy turns original arguments
into a tuple
if p1.sceneBoundingRect().contains(pos):
mousePoint = vb.mapSceneToView(pos)
index = int(mousePoint.x())
if index > 0 and index < len(data1):
label.setText("<span style='font-size: 12pt'>x=%0.1f,
<span style='color: red'>y1=%0.1f</span>, <span style='color:
green'>y2=%0.1f</span>" % (mousePoint.x(), data1[index], data2[index]))
vLine.setPos(mousePoint.x())
hLine.setPos(mousePoint.y())
proxy = pg.SignalProxy(p1.scene().sigMouseMoved, rateLimit=60,
slot=mouseMoved)
if __name__ == '__main__':
import sys
app = QtGui.QApplication([])
myOtherWindow = OtherWindow()
myOtherWindow.show()
if (sys.flags.interactive != 1) or not hasattr(QtCore, 'PYQT_VERSION'):
QtGui.QApplication.instance().exec_()
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