31928e70a5
- 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
35 lines
1.3 KiB
Python
35 lines
1.3 KiB
Python
# -*- coding: utf-8 -*-
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"""
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Very simple example demonstrating RemoteGraphicsView.
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This allows graphics to be rendered in a child process and displayed in the
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parent, which can improve CPU usage on multi-core processors.
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"""
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import initExample ## Add path to library (just for examples; you do not need this)
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from pyqtgraph.Qt import QtGui, QtCore
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import pyqtgraph as pg
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from pyqtgraph.widgets.RemoteGraphicsView import RemoteGraphicsView
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app = pg.mkQApp()
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## Create the widget
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v = RemoteGraphicsView(debug=False) # setting debug=True causes both processes to print information
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# about interprocess communication
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v.show()
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v.setWindowTitle('pyqtgraph example: RemoteGraphicsView')
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## v.pg is a proxy to the remote process' pyqtgraph module. All attribute
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## requests and function calls made with this object are forwarded to the
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## remote process and executed there. See pyqtgraph.multiprocess.remoteproxy
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## for more inormation.
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plt = v.pg.PlotItem()
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v.setCentralItem(plt)
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plt.plot([1,4,2,3,6,2,3,4,2,3], pen='g')
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## Start Qt event loop unless running in interactive mode or using pyside.
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if __name__ == '__main__':
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import sys
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if (sys.flags.interactive != 1) or not hasattr(QtCore, 'PYQT_VERSION'):
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QtGui.QApplication.instance().exec_()
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