我发布了将进度条码移植到WinPython-64bit-3.4.3.5-Qt5的问题。 它在WinPython-64bit-3.4.3.5中运行良好。 （Qt4版） 我从Spyder做的测试是从Python控制台中击中F5。
可以解释为什么下面的代码使用Qt4而不是Qt5吗？
# -*- coding: utf-8 -*-
"""
Created on Thu Aug 13 13:00:35 2015
@author: dpenev
"""
import sys
global PYQT
try:
from PyQt4 import QtGui, QtCore
PYQT = 4
except:
from PyQt5 import QtGui, QtCore, QtWidgets
PYQT = 5
#-------------------------------------------------------------------------------
if PYQT == 5:
class PB(QtWidgets.QMainWindow):
def __init__(self):
super(PB, self).__init__()
self.captions=[]
self.pbs=[]
self.wds=[]
self.closedelays=[]
self.cur=0
def close(self):
del(self.captions[self.cur])
del(self.closedelays[self.cur])
del(self.pbs[self.cur])
self.wds[self.cur].close()
del(self.wds[self.cur])
def new(self, caption, progress, closedelay):
self.captions = self.captions + [caption]
self.cur=len(self.captions)-1
self.wds.extend([QtWidgets.QWidget()])
self.closedelays=self.closedelays + [closedelay]
self.wds[self.cur].setWindowTitle(caption)
self.wds[self.cur].setWindowFlags(QtCore.Qt.WindowStaysOnTopHint)
self.wds[self.cur].raise_()
self.pbs.extend([QtWidgets.QProgressBar(self.wds[self.cur])])
self.pbs[self.cur].setGeometry(30, 40, 200, 25)
if progress < 100: #Update progress
self.pbs[self.cur].setValue(abs(progress))
self.wds[self.cur].show()
self.wds[self.cur].repaint()
else: #100% shedule for closing
self.pbs[self.cur].setValue(100)
self.wds[self.cur].show()
t=QtCore.QTimer()
t.singleShot(1000*self.closedelays[self.cur], self.close)
def update(self, caption, progress):
self.cur=self.captions.index(caption) #Existing progressbar
if not self.pbs[self.cur].isVisible(): #User has closed the progressbar
del(self.captions[self.cur])
del(self.wds[self.cur])
del(self.pbs[self.cur])
del(self.closedelays[self.cur])
else:
if progress < 100: #Update progress
self.pbs[self.cur].setValue(abs(progress))
self.wds[self.cur].show()
else: #100%, shedule for closing
self.pbs[self.cur].setValue(100)
self.wds[self.cur].show()
t=QtCore.QTimer()
t.singleShot(1000*self.closedelays[self.cur], self.close)
else:
class PB(QtGui.QMainWindow):
def __init__(self):
super(PB, self).__init__()
self.captions=[]
self.pbs=[]
self.wds=[]
self.closedelays=[]
self.cur=0
def close(self):
del(self.captions[self.cur])
del(self.closedelays[self.cur])
del(self.pbs[self.cur])
self.wds[self.cur].close()
del(self.wds[self.cur])
def new(self, caption, progress, closedelay):
self.captions = self.captions + [caption]
self.cur=len(self.captions)-1
self.wds.extend([QtGui.QWidget()])
self.closedelays=self.closedelays + [closedelay]
self.wds[self.cur].setWindowTitle(caption)
self.wds[self.cur].setWindowFlags(QtCore.Qt.WindowStaysOnTopHint)
self.wds[self.cur].raise_()
self.pbs.extend([QtGui.QProgressBar(self.wds[self.cur])])
self.pbs[self.cur].setGeometry(30, 40, 200, 25)
if progress < 100: #Update progress
self.pbs[self.cur].setValue(abs(progress))
self.wds[self.cur].show()
self.wds[self.cur].repaint()
else: #100% shedule for closing
self.pbs[self.cur].setValue(100)
self.wds[self.cur].show()
t=QtCore.QTimer()
t.singleShot(1000*self.closedelays[self.cur], self.close)
def update(self, caption, progress):
self.cur=self.captions.index(caption) #Existing progressbar
if not self.pbs[self.cur].isVisible(): #User has closed the progressbar
del(self.captions[self.cur])
del(self.wds[self.cur])
del(self.pbs[self.cur])
del(self.closedelays[self.cur])
else:
if progress < 100: #Update progress
self.pbs[self.cur].setValue(abs(progress))
self.wds[self.cur].show()
else: #100%, shedule for closing
self.pbs[self.cur].setValue(100)
self.wds[self.cur].show()
t=QtCore.QTimer()
t.singleShot(1000*self.closedelays[self.cur], self.close)
if PYQT == 5:
app=QtWidgets.QApplication.instance() # checks if QApplication already exists
if not app: # create QApplication if it doesnt exist
app = QtWidgets.QApplication(sys.argv)
else:
app=QtGui.QApplication.instance() # checks if QApplication already exists
if not app: # create QApplication if it doesnt exist
app = QtGui.QApplication(sys.argv)
pb=PB()
def progressBox(caption,progress,closedelay=1):
'''Displays a small window that shows a progress bar.
Arguments:
caption: message text
A different text opens a different progress bar.
progress: sets the position of the progress bar in % (0...100)
To update the progress bar use repeated calls with
the same message text but different progress settings.
Setting the progress to 100% will automatically
close the window after a delay.
closedelay: delay in seconds. This is the time that elapses
between setting progress to 100% and the closing
of the window.
This function returns immediately after each call.
Example:
import PYnGUInBox as GUI
GUI.progressBox('Fitting algorithm progress',12)
'''
try:
idx=pb.captions.index(caption)
pb.update(caption,progress)
except:
pb.new(caption,progress,closedelay)
if __name__ == '__main__':
import time
progressBox('Fitting algorithm progress',12)
time.sleep(3)
progressBox('Fitting algorithm progress',50)
time.sleep(3)
progressBox('Fitting algorithm progress',100)