pyqtgraph/examples/test_ImageItem.py

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# -*- coding: utf-8 -*-
## Add path to library (just for examples; you do not need this)
import sys, os
sys.path.append(os.path.join(os.path.dirname(__file__), '..', '..'))
from pyqtgraph.GraphicsView import *
from pyqtgraph.graphicsItems import *
from numpy import random
from PyQt4 import QtCore, QtGui
from scipy.ndimage import *
app = QtGui.QApplication([])
## Create window with GraphicsView widget
win = QtGui.QMainWindow()
view = GraphicsView()
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#view.useOpenGL(True)
win.setCentralWidget(view)
win.show()
## Allow mouse scale/pan
view.enableMouse()
## ..But lock the aspect ratio
view.setAspectLocked(True)
## Create image item
img = ImageItem()
view.scene().addItem(img)
## Set initial view bounds
view.setRange(QtCore.QRectF(0, 0, 200, 200))
def updateData():
global img
## Create random image
data = random.random((200, 200))
## Display the data
img.updateImage(data)
# update image data every 20ms (or so)
t = QtCore.QTimer()
QtCore.QObject.connect(t, QtCore.SIGNAL('timeout()'), updateData)
t.start(20)
app.exec_()