4d846e2aad
- disabled opengl (performance issues in Qt 4.7)
- numerous caching changes (disabled deviceCoordinateCache due to performance issues)
- speed up loading large images in ImageView
- bugfixes from Ingo Breßler
- Transform rotation bugfix
- Added debug module
- Major performance enhancements for scatterplot, fixed point clicking issues
** API change for scatterplot click signals
- Drawing on ImageItem is working well now
- PlotItem downsampling no longer uses scipy.signal.resample (this was creating artifacts)
- Fixed ViewBox behavior when aspect-locked
69 lines
1.4 KiB
Python
Executable File
69 lines
1.4 KiB
Python
Executable File
# -*- 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 PyQt4 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()
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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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## Create random image
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data = np.random.normal(size=(50, 200, 200))
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i = 0
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def updateData():
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global img, data, i
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## Display the data
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img.updateImage(data[i])
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i = (i+1) % data.shape[0]
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QtCore.QTimer.singleShot(20, updateData)
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# update image data every 20ms (or so)
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#t = QtCore.QTimer()
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#t.timeout.connect(updateData)
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#t.start(20)
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updateData()
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def doWork():
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while True:
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x = '.'.join(['%f'%i for i in range(100)]) ## some work for the thread to do
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if time is None: ## main thread has started cleaning up, bail out now
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break
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time.sleep(1e-3)
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import thread
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thread.start_new_thread(doWork, ())
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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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