编辑:在PyQt4进度栏上有许多类似的帖子没有更新。它们都关注线程问题&程序实际上是在哪里更新窗口的。虽然很有帮助,但我的代码结构非常复杂,所以答复不太实用。这里给出的被接受的答案是简单的,关键是工作。
我在Win 7 PyQT机器上使用Python2.7和x64 4。
我试图清除窗口中的一个小部件,一个“接受”按钮,查看代码,然后用一个进度条替换它。
即使我关闭了“接受”按钮&在进入处理循环之前添加进度条。该窗口只在循环完成后更新&进度条直接跳转到100%。
我的密码
from PyQt4 import QtCore, QtGui
import sys
import time
class CentralWidget(QtGui.QWidget):
def __init__(self, parent=None):
super(CentralWidget, self).__init__(parent)
# set layouts
self.layout = QtGui.QVBoxLayout(self)
# Poly names
self.pNames = QtGui.QLabel("Import file name", self)
self.polyNameInput = QtGui.QLineEdit(self)
# Polytype selection
self.polyTypeName = QtGui.QLabel("Particle type", self)
polyType = QtGui.QComboBox(self)
polyType.addItem("")
polyType.addItem("Random polyhedra")
polyType.addItem("Spheres")
polyType.addItem("Waterman polyhedra")
polyType.activated[str].connect(self.onActivated)
# Place widgets in layout
self.layout.addWidget(self.pNames)
self.layout.addWidget(self.polyNameInput)
self.layout.addWidget(self.polyTypeName)
self.layout.addWidget(polyType)
self.layout.addStretch()
# Combobox choice
def onActivated(self, text):
if text=="Random polyhedra":
self.randomPolyhedra(text)
if text=="Spheres": # not implementaed yet
self.polyTypeName.setText("Not implemented yet.")
self.polyTypeName.adjustSize()
if text=="Waterman polyhedra": # not implementaed yet
self.polyTypeName.setText("Not implemented yet.")
self.polyTypeName.adjustSize()
# New options for random polyhedra choice
def randomPolyhedra(self, text):
self.polyNumberLbl = QtGui.QLabel("How many: ", self)
self.polyNumber = QtGui.QLineEdit(self)
self.acceptSeed = QtGui.QPushButton('Accept') # Accept button created
self.acceptSeed.clicked.connect(lambda: self.ranPolyGen())
self.layout.addWidget(self.polyNumberLbl)
self.layout.addWidget(self.polyNumber)
self.layout.addWidget(self.acceptSeed) # Accept button in layout
self.randFlag = True
self.polyTypeName.setText(text)
self.polyTypeName.adjustSize()
# Act on option choices for random polyhedra
def ranPolyGen(self):
polyCount = int(self.polyNumber.text())
self.progressBar = QtGui.QProgressBar() # Progress bar created
self.progressBar.setMinimum(1)
self.progressBar.setMaximum(polyCount)
self.acceptSeed.close() # Accept button closed
self.layout.addWidget(self.progressBar) # Add progressbar to layout
for poly in range(1, polyCount+1):
time.sleep(1) # Calls to main polyhedral generating code go here
print poly
self.progressBar.setValue(poly)
self.doneLbl = QtGui.QLabel("Done", self)
self.layout.addWidget(self.doneLbl)
# Creates GUI
class Polyhedra(QtGui.QMainWindow):
def __init__(self):
super(Polyhedra, self).__init__()
# Place central widget in layout
self.central_widget = CentralWidget(self)
self.setCentralWidget(self.central_widget)
# Set up window
self.setGeometry(500, 500, 300, 300)
self.setWindowTitle('Pyticle')
self.show()
# Combo box
def onActivated(self, text):
self.central_widget.onActivated(text)
def main():
app = QtGui.QApplication(sys.argv)
poly = Polyhedra()
sys.exit(app.exec_())
if __name__ == '__main__':
main()下面是循环执行过程的图片&完成后。
我认为我对addWidget()方法不感兴趣。我的印象是,这将在当前布局中添加另一个小部件(这里是一个vbox布局)&当被指示这样做时,.close()方法删除了一个小部件。
我遗漏了什么?

发布于 2015-06-13 21:59:25
你可以加上:
from PyQt4.QtGui import QApplication然后在for循环中:
QApplication.processEvents() 您的应用程序实际上正在变得没有响应,您需要调用processEvents()来处理事件并重新绘制gui。我对pyqt并不太熟悉,但我认为另一种选择是使用线程。
https://stackoverflow.com/questions/30823863
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