65 lines
1.4 KiB
Python
65 lines
1.4 KiB
Python
# -*- coding: utf-8 -*-
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"""
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Simple example of GraphItem use.
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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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import pyqtgraph as pg
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from pyqtgraph.Qt import QtCore, QtGui
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import numpy as np
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w = pg.GraphicsWindow()
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w.setWindowTitle('pyqtgraph example: GraphItem')
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v = w.addViewBox()
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v.setAspectLocked()
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g = pg.GraphItem()
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v.addItem(g)
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## Define positions of nodes
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pos = np.array([
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[0,0],
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[10,0],
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[0,10],
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[10,10],
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[5,5],
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[15,5]
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])
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## Define the set of connections in the graph
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adj = np.array([
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[0,1],
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[1,3],
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[3,2],
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[2,0],
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[1,5],
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[3,5],
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])
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## Define the symbol to use for each node (this is optional)
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symbols = ['o','o','o','o','t','+']
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## Define the line style for each connection (this is optional)
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lines = np.array([
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(255,0,0,255,1),
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(255,0,255,255,2),
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(255,0,255,255,3),
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(255,255,0,255,2),
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(255,0,0,255,1),
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(255,255,255,255,4),
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], dtype=[('red',np.ubyte),('green',np.ubyte),('blue',np.ubyte),('alpha',np.ubyte),('width',float)])
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## Update the graph
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g.setData(pos=pos, adj=adj, pen=lines, size=1, symbol=symbols, pxMode=False)
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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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