45 lines
1.0 KiB
Python
45 lines
1.0 KiB
Python
# -*- coding: utf-8 -*-
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## Add path to library (just for examples; you do not need this)
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import sys, os
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sys.path.insert(0, os.path.join(os.path.dirname(__file__), '..', '..'))
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from pyqtgraph.Qt import QtCore, QtGui
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import numpy as np
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import pyqtgraph as pg
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app = QtGui.QApplication([])
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## Create window with GraphicsView widget
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win = QtGui.QMainWindow()
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win.resize(800,800)
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view = pg.GraphicsView()
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#view.useOpenGL(True)
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win.setCentralWidget(view)
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win.show()
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## Allow mouse scale/pan
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view.enableMouse()
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## ..But lock the aspect ratio
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view.setAspectLocked(True)
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## Create image item
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img = pg.ImageItem(np.zeros((200,200)))
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view.scene().addItem(img)
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## Set initial view bounds
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view.setRange(QtCore.QRectF(0, 0, 200, 200))
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## start drawing with 3x3 brush
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kern = np.array([
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[0.0, 0.5, 0.0],
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[0.5, 1.0, 0.5],
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[0.0, 0.5, 0.0]
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])
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img.setDrawKernel(kern, mask=kern, center=(1,1), mode='add')
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img.setLevels([0, 10])
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## Start Qt event loop unless running in interactive mode.
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if sys.flags.interactive != 1:
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app.exec_()
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