e0e1123d33
PolyLineROI.getArrayRegion correctly applies mask to N-dimensional data fixed multiprocess for python2.6 compatibility
339 lines
12 KiB
Python
339 lines
12 KiB
Python
# -*- coding: utf-8 -*-
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"""
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PyQtGraph - Scientific Graphics and GUI Library for Python
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www.pyqtgraph.org
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"""
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__version__ = None
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### import all the goodies and add some helper functions for easy CLI use
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## 'Qt' is a local module; it is intended mainly to cover up the differences
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## between PyQt4 and PySide.
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from .Qt import QtGui
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## not really safe--If we accidentally create another QApplication, the process hangs (and it is very difficult to trace the cause)
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#if QtGui.QApplication.instance() is None:
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#app = QtGui.QApplication([])
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import numpy ## pyqtgraph requires numpy
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## (import here to avoid massive error dump later on if numpy is not available)
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import os, sys
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## check python version
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## Allow anything >= 2.7
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if sys.version_info[0] < 2 or (sys.version_info[0] == 2 and sys.version_info[1] < 6):
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raise Exception("Pyqtgraph requires Python version 2.6 or greater (this is %d.%d)" % (sys.version_info[0], sys.version_info[1]))
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## helpers for 2/3 compatibility
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from . import python2_3
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## install workarounds for numpy bugs
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from . import numpy_fix
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## in general openGL is poorly supported with Qt+GraphicsView.
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## we only enable it where the performance benefit is critical.
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## Note this only applies to 2D graphics; 3D graphics always use OpenGL.
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if 'linux' in sys.platform: ## linux has numerous bugs in opengl implementation
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useOpenGL = False
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elif 'darwin' in sys.platform: ## openGL can have a major impact on mac, but also has serious bugs
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useOpenGL = False
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if QtGui.QApplication.instance() is not None:
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print('Warning: QApplication was created before pyqtgraph was imported; there may be problems (to avoid bugs, call QApplication.setGraphicsSystem("raster") before the QApplication is created).')
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QtGui.QApplication.setGraphicsSystem('raster') ## work around a variety of bugs in the native graphics system
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else:
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useOpenGL = False ## on windows there's a more even performance / bugginess tradeoff.
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CONFIG_OPTIONS = {
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'useOpenGL': useOpenGL, ## by default, this is platform-dependent (see widgets/GraphicsView). Set to True or False to explicitly enable/disable opengl.
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'leftButtonPan': True, ## if false, left button drags a rubber band for zooming in viewbox
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'foreground': (150, 150, 150), ## default foreground color for axes, labels, etc.
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'background': (0, 0, 0), ## default background for GraphicsWidget
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'antialias': False,
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'editorCommand': None, ## command used to invoke code editor from ConsoleWidgets
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'useWeave': True, ## Use weave to speed up some operations, if it is available
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'weaveDebug': False, ## Print full error message if weave compile fails
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'exitCleanup': True, ## Attempt to work around some exit crash bugs in PyQt and PySide
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'enableExperimental': False, ## Enable experimental features (the curious can search for this key in the code)
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}
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def setConfigOption(opt, value):
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CONFIG_OPTIONS[opt] = value
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def setConfigOptions(**opts):
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CONFIG_OPTIONS.update(opts)
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def getConfigOption(opt):
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return CONFIG_OPTIONS[opt]
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def systemInfo():
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print("sys.platform: %s" % sys.platform)
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print("sys.version: %s" % sys.version)
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from .Qt import VERSION_INFO
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print("qt bindings: %s" % VERSION_INFO)
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global __version__
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rev = None
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if __version__ is None: ## this code was probably checked out from bzr; look up the last-revision file
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lastRevFile = os.path.join(os.path.dirname(__file__), '..', '.bzr', 'branch', 'last-revision')
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if os.path.exists(lastRevFile):
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rev = open(lastRevFile, 'r').read().strip()
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print("pyqtgraph: %s; %s" % (__version__, rev))
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print("config:")
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import pprint
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pprint.pprint(CONFIG_OPTIONS)
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## Rename orphaned .pyc files. This is *probably* safe :)
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## We only do this if __version__ is None, indicating the code was probably pulled
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## from the repository.
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def renamePyc(startDir):
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### Used to rename orphaned .pyc files
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### When a python file changes its location in the repository, usually the .pyc file
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### is left behind, possibly causing mysterious and difficult to track bugs.
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### Note that this is no longer necessary for python 3.2; from PEP 3147:
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### "If the py source file is missing, the pyc file inside __pycache__ will be ignored.
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### This eliminates the problem of accidental stale pyc file imports."
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printed = False
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startDir = os.path.abspath(startDir)
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for path, dirs, files in os.walk(startDir):
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if '__pycache__' in path:
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continue
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for f in files:
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fileName = os.path.join(path, f)
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base, ext = os.path.splitext(fileName)
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py = base + ".py"
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if ext == '.pyc' and not os.path.isfile(py):
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if not printed:
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print("NOTE: Renaming orphaned .pyc files:")
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printed = True
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n = 1
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while True:
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name2 = fileName + ".renamed%d" % n
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if not os.path.exists(name2):
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break
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n += 1
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print(" " + fileName + " ==>")
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print(" " + name2)
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os.rename(fileName, name2)
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path = os.path.split(__file__)[0]
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if __version__ is None and not hasattr(sys, 'frozen') and sys.version_info[0] == 2: ## If we are frozen, there's a good chance we don't have the original .py files anymore.
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renamePyc(path)
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## Import almost everything to make it available from a single namespace
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## don't import the more complex systems--canvas, parametertree, flowchart, dockarea
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## these must be imported separately.
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from . import frozenSupport
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def importModules(path, globals, locals, excludes=()):
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"""Import all modules residing within *path*, return a dict of name: module pairs.
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Note that *path* MUST be relative to the module doing the import.
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"""
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d = os.path.join(os.path.split(globals['__file__'])[0], path)
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files = set()
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for f in frozenSupport.listdir(d):
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if frozenSupport.isdir(os.path.join(d, f)) and f != '__pycache__':
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files.add(f)
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elif f[-3:] == '.py' and f != '__init__.py':
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files.add(f[:-3])
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elif f[-4:] == '.pyc' and f != '__init__.pyc':
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files.add(f[:-4])
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mods = {}
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path = path.replace(os.sep, '.')
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for modName in files:
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if modName in excludes:
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continue
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try:
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if len(path) > 0:
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modName = path + '.' + modName
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#mod = __import__(modName, globals, locals, fromlist=['*'])
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mod = __import__(modName, globals, locals, ['*'], 1)
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mods[modName] = mod
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except:
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import traceback
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traceback.print_stack()
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sys.excepthook(*sys.exc_info())
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print("[Error importing module: %s]" % modName)
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return mods
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def importAll(path, globals, locals, excludes=()):
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"""Given a list of modules, import all names from each module into the global namespace."""
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mods = importModules(path, globals, locals, excludes)
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for mod in mods.values():
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if hasattr(mod, '__all__'):
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names = mod.__all__
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else:
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names = [n for n in dir(mod) if n[0] != '_']
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for k in names:
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if hasattr(mod, k):
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globals[k] = getattr(mod, k)
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importAll('graphicsItems', globals(), locals())
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importAll('widgets', globals(), locals(), excludes=['MatplotlibWidget', 'RemoteGraphicsView'])
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from .imageview import *
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from .WidgetGroup import *
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from .Point import Point
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from .Vector import Vector
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from .SRTTransform import SRTTransform
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from .Transform3D import Transform3D
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from .SRTTransform3D import SRTTransform3D
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from .functions import *
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from .graphicsWindows import *
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from .SignalProxy import *
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from .colormap import *
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from .ptime import time
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##############################################################
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## PyQt and PySide both are prone to crashing on exit.
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## There are two general approaches to dealing with this:
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## 1. Install atexit handlers that assist in tearing down to avoid crashes.
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## This helps, but is never perfect.
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## 2. Terminate the process before python starts tearing down
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## This is potentially dangerous
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## Attempts to work around exit crashes:
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import atexit
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def cleanup():
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if not getConfigOption('exitCleanup'):
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return
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ViewBox.quit() ## tell ViewBox that it doesn't need to deregister views anymore.
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## Workaround for Qt exit crash:
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## ALL QGraphicsItems must have a scene before they are deleted.
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## This is potentially very expensive, but preferred over crashing.
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## Note: this appears to be fixed in PySide as of 2012.12, but it should be left in for a while longer..
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if QtGui.QApplication.instance() is None:
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return
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import gc
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s = QtGui.QGraphicsScene()
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for o in gc.get_objects():
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try:
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if isinstance(o, QtGui.QGraphicsItem) and o.scene() is None:
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s.addItem(o)
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except RuntimeError: ## occurs if a python wrapper no longer has its underlying C++ object
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continue
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atexit.register(cleanup)
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## Optional function for exiting immediately (with some manual teardown)
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def exit():
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"""
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Causes python to exit without garbage-collecting any objects, and thus avoids
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calling object destructor methods. This is a sledgehammer workaround for
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a variety of bugs in PyQt and Pyside that cause crashes on exit.
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This function does the following in an attempt to 'safely' terminate
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the process:
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* Invoke atexit callbacks
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* Close all open file handles
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* os._exit()
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Note: there is some potential for causing damage with this function if you
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are using objects that _require_ their destructors to be called (for example,
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to properly terminate log files, disconnect from devices, etc). Situations
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like this are probably quite rare, but use at your own risk.
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"""
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## first disable our own cleanup function; won't be needing it.
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setConfigOptions(exitCleanup=False)
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## invoke atexit callbacks
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atexit._run_exitfuncs()
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## close file handles
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os.closerange(3, 4096) ## just guessing on the maximum descriptor count..
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os._exit(os.EX_OK)
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## Convenience functions for command-line use
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plots = []
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images = []
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QAPP = None
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def plot(*args, **kargs):
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"""
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Create and return a :class:`PlotWindow <pyqtgraph.PlotWindow>`
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(this is just a window with :class:`PlotWidget <pyqtgraph.PlotWidget>` inside), plot data in it.
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Accepts a *title* argument to set the title of the window.
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All other arguments are used to plot data. (see :func:`PlotItem.plot() <pyqtgraph.PlotItem.plot>`)
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"""
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mkQApp()
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#if 'title' in kargs:
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#w = PlotWindow(title=kargs['title'])
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#del kargs['title']
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#else:
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#w = PlotWindow()
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#if len(args)+len(kargs) > 0:
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#w.plot(*args, **kargs)
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pwArgList = ['title', 'labels', 'name', 'left', 'right', 'top', 'bottom']
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pwArgs = {}
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dataArgs = {}
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for k in kargs:
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if k in pwArgList:
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pwArgs[k] = kargs[k]
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else:
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dataArgs[k] = kargs[k]
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w = PlotWindow(**pwArgs)
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w.plot(*args, **dataArgs)
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plots.append(w)
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w.show()
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return w
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def image(*args, **kargs):
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"""
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Create and return an :class:`ImageWindow <pyqtgraph.ImageWindow>`
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(this is just a window with :class:`ImageView <pyqtgraph.ImageView>` widget inside), show image data inside.
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Will show 2D or 3D image data.
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Accepts a *title* argument to set the title of the window.
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All other arguments are used to show data. (see :func:`ImageView.setImage() <pyqtgraph.ImageView.setImage>`)
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"""
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mkQApp()
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w = ImageWindow(*args, **kargs)
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images.append(w)
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w.show()
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return w
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show = image ## for backward compatibility
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def dbg():
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"""
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Create a console window and begin watching for exceptions.
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"""
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mkQApp()
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import console
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c = console.ConsoleWidget()
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c.catchAllExceptions()
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c.show()
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global consoles
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try:
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consoles.append(c)
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except NameError:
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consoles = [c]
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def mkQApp():
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global QAPP
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inst = QtGui.QApplication.instance()
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if inst is None:
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QAPP = QtGui.QApplication([])
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else:
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QAPP = inst
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return QAPP
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