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from pyqtgraph.Qt import QtGui, QtCore
__all__ = ['BusyCursor']
class BusyCursor(object):
"""Class for displaying a busy mouse cursor during long operations.
Usage::
with pyqtgraph.BusyCursor():
doLongOperation()
May be nested.
"""
active = []
def __enter__(self):
QtGui.QApplication.setOverrideCursor(QtGui.QCursor(QtCore.Qt.WaitCursor))
BusyCursor.active.append(self)
def __exit__(self, *args):
BusyCursor.active.pop(-1)
if len(BusyCursor.active) == 0:
QtGui.QApplication.restoreOverrideCursor()
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