113 lines
3.7 KiB
Python
113 lines
3.7 KiB
Python
# -*- coding: utf-8 -*-
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from pyqtgraph.Qt import QtGui, QtCore
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__all__ = ['ProgressDialog']
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class ProgressDialog(QtGui.QProgressDialog):
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"""
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Extends QProgressDialog for use in 'with' statements.
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Example::
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with ProgressDialog("Processing..", minVal, maxVal) as dlg:
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# do stuff
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dlg.setValue(i) ## could also use dlg += 1
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if dlg.wasCanceled():
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raise Exception("Processing canceled by user")
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"""
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def __init__(self, labelText, minimum=0, maximum=100, cancelText='Cancel', parent=None, wait=250, busyCursor=False, disable=False):
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"""
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============== ================================================================
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**Arguments:**
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labelText (required)
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cancelText Text to display on cancel button, or None to disable it.
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minimum
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maximum
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parent
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wait Length of time (im ms) to wait before displaying dialog
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busyCursor If True, show busy cursor until dialog finishes
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disable If True, the progress dialog will not be displayed
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and calls to wasCanceled() will always return False.
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If ProgressDialog is entered from a non-gui thread, it will
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always be disabled.
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============== ================================================================
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"""
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isGuiThread = QtCore.QThread.currentThread() == QtCore.QCoreApplication.instance().thread()
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self.disabled = disable or (not isGuiThread)
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if self.disabled:
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return
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noCancel = False
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if cancelText is None:
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cancelText = ''
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noCancel = True
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self.busyCursor = busyCursor
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QtGui.QProgressDialog.__init__(self, labelText, cancelText, minimum, maximum, parent)
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self.setMinimumDuration(wait)
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self.setWindowModality(QtCore.Qt.WindowModal)
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self.setValue(self.minimum())
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if noCancel:
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self.setCancelButton(None)
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def __enter__(self):
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if self.disabled:
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return self
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if self.busyCursor:
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QtGui.QApplication.setOverrideCursor(QtGui.QCursor(QtCore.Qt.WaitCursor))
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return self
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def __exit__(self, exType, exValue, exTrace):
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if self.disabled:
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return
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if self.busyCursor:
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QtGui.QApplication.restoreOverrideCursor()
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self.setValue(self.maximum())
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def __iadd__(self, val):
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"""Use inplace-addition operator for easy incrementing."""
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if self.disabled:
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return self
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self.setValue(self.value()+val)
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return self
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## wrap all other functions to make sure they aren't being called from non-gui threads
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def setValue(self, val):
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if self.disabled:
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return
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QtGui.QProgressDialog.setValue(self, val)
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def setLabelText(self, val):
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if self.disabled:
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return
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QtGui.QProgressDialog.setLabelText(self, val)
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def setMaximum(self, val):
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if self.disabled:
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return
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QtGui.QProgressDialog.setMaximum(self, val)
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def setMinimum(self, val):
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if self.disabled:
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return
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QtGui.QProgressDialog.setMinimum(self, val)
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def wasCanceled(self):
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if self.disabled:
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return False
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return QtGui.QProgressDialog.wasCanceled(self)
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def maximum(self):
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if self.disabled:
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return 0
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return QtGui.QProgressDialog.maximum(self)
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def minimum(self):
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if self.disabled:
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return 0
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return QtGui.QProgressDialog.minimum(self)
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