pyqtgraph/examples/RemoteGraphicsView.py
Luke Campagnola 31928e70a5 Bugfixes:
- GraphicsView.render now correctly invokes GraphicsScene.prepareForPaint
 - Fixed RemoteGraphicsView renderer to use new PyQt QImage API.
 - multiprocess.Process now pipes stdout/err directly to console when in debugging mode
2013-11-06 23:14:27 -05:00

35 lines
1.3 KiB
Python

# -*- coding: utf-8 -*-
"""
Very simple example demonstrating RemoteGraphicsView.
This allows graphics to be rendered in a child process and displayed in the
parent, which can improve CPU usage on multi-core processors.
"""
import initExample ## Add path to library (just for examples; you do not need this)
from pyqtgraph.Qt import QtGui, QtCore
import pyqtgraph as pg
from pyqtgraph.widgets.RemoteGraphicsView import RemoteGraphicsView
app = pg.mkQApp()
## Create the widget
v = RemoteGraphicsView(debug=False) # setting debug=True causes both processes to print information
# about interprocess communication
v.show()
v.setWindowTitle('pyqtgraph example: RemoteGraphicsView')
## v.pg is a proxy to the remote process' pyqtgraph module. All attribute
## requests and function calls made with this object are forwarded to the
## remote process and executed there. See pyqtgraph.multiprocess.remoteproxy
## for more inormation.
plt = v.pg.PlotItem()
v.setCentralItem(plt)
plt.plot([1,4,2,3,6,2,3,4,2,3], pen='g')
## Start Qt event loop unless running in interactive mode or using pyside.
if __name__ == '__main__':
import sys
if (sys.flags.interactive != 1) or not hasattr(QtCore, 'PYQT_VERSION'):
QtGui.QApplication.instance().exec_()