pyqtgraph/__init__.py

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# -*- coding: utf-8 -*-
### import all the goodies and add some helper functions for easy CLI use
## 'Qt' is a local module; it is intended mainly to cover up the differences
## between PyQt4 and PySide.
from Qt import QtGui
## not really safe.
#if QtGui.QApplication.instance() is None:
#app = QtGui.QApplication([])
CONFIG_OPTIONS = {
'leftButtonPan': True ## if false, left button drags a rubber band for zooming in viewbox
}
def setConfigOption(opt, value):
CONFIG_OPTIONS[opt] = value
def getConfigOption(opt):
return CONFIG_OPTIONS[opt]
## Import almost everything to make it available from a single namespace
## don't import the more complex systems--canvas, parametertree, flowchart, dockarea
## these must be imported separately.
import os
def importAll(path):
d = os.path.join(os.path.split(__file__)[0], path)
files = []
for f in os.listdir(d):
if os.path.isdir(os.path.join(d, f)):
files.append(f)
elif f[-3:] == '.py' and f != '__init__.py':
files.append(f[:-3])
for modName in files:
mod = __import__(path+"."+modName, globals(), locals(), fromlist=['*'])
if hasattr(mod, '__all__'):
names = mod.__all__
else:
names = [n for n in dir(mod) if n[0] != '_']
for k in names:
if hasattr(mod, k):
globals()[k] = getattr(mod, k)
importAll('graphicsItems')
importAll('widgets')
from imageview import *
from WidgetGroup import *
from Point import Point
from Transform import Transform
from functions import *
from graphicsWindows import *
from SignalProxy import *
## Convenience functions for command-line use
plots = []
images = []
QAPP = None
def plot(*args, **kargs):
"""
| Create and return a PlotWindow (this is just a window with PlotWidget inside), plot data in it.
| Accepts a *title* argument to set the title of the window.
| All other arguments are used to plot data. (see :func:`PlotItem.plot() <pyqtgraph.PlotItem.plot>`)
"""
mkQApp()
if 'title' in kargs:
w = PlotWindow(title=kargs['title'])
del kargs['title']
else:
w = PlotWindow()
if len(args)+len(kargs) > 0:
w.plot(*args, **kargs)
plots.append(w)
w.show()
return w
def image(*args, **kargs):
"""
| Create and return an ImageWindow (this is just a window with ImageView widget inside), show image data inside.
| Will show 2D or 3D image data.
| Accepts a *title* argument to set the title of the window.
| All other arguments are used to show data. (see :func:`ImageView.setImage() <pyqtgraph.ImageView.setImage>`)
"""
mkQApp()
w = ImageWindow(*args, **kargs)
images.append(w)
w.show()
return w
show = image ## for backward compatibility
def mkQApp():
if QtGui.QApplication.instance() is None:
global QAPP
QAPP = QtGui.QApplication([])