32 lines
815 B
Python
32 lines
815 B
Python
# -*- coding: utf-8 -*-
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"""
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Demonstrates ScaleBar
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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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pg.mkQApp()
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win = pg.GraphicsLayoutWidget(show=True)
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win.setWindowTitle('pyqtgraph example: ScaleBar')
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vb = win.addViewBox()
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vb.setAspectLocked()
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img = pg.ImageItem()
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img.setImage(np.random.normal(size=(100,100)))
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img.setScale(0.01)
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vb.addItem(img)
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scale = pg.ScaleBar(size=0.1)
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scale.setParentItem(vb)
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scale.anchor((1, 1), (1, 1), offset=(-20, -20))
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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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