32 lines
803 B
Python
32 lines
803 B
Python
|
# -*- coding: utf-8 -*-
|
||
|
|
"""
|
||
|
|
Demonstrates ScaleBar
|
||
|
|
"""
|
||
|
|
import initExample ## Add path to library (just for examples; you do not need this)
|
||
|
|
|
||
|
|
import pyqtgraph as pg
|
||
|
|
from pyqtgraph.Qt import QtCore, QtGui
|
||
|
|
import numpy as np
|
||
|
|
|
||
|
|
pg.mkQApp()
|
||
|
|
win = pg.GraphicsWindow()
|
||
|
|
win.setWindowTitle('pyqtgraph example: ScaleBar')
|
||
|
|
|
||
|
|
vb = win.addViewBox()
|
||
|
|
vb.setAspectLocked()
|
||
|
|
|
||
|
|
img = pg.ImageItem()
|
||
|
|
img.setImage(np.random.normal(size=(100,100)))
|
||
|
|
img.scale(0.01, 0.01)
|
||
|
|
vb.addItem(img)
|
||
|
|
|
||
|
|
scale = pg.ScaleBar(size=0.1)
|
||
|
|
scale.setParentItem(vb)
|
||
|
|
scale.anchor((1, 1), (1, 1), offset=(-20, -20))
|
||
|
|
|
||
|
|
## 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_()
|