1
我試圖在打電話給Popen命令的同時打一個throbber(形式爲動畫追逐箭頭gif),但它不起作用,因爲我認爲gui在Popen命令運行時完全沒有響應。我怎樣才能解決這個問題? 請檢查我的代碼如下。如何在打Popen電話時讓我的gui響應?
import subprocess
import os
import sys
from PyQt4 import QtCore, QtGui
class Test(QtGui.QDialog):
def __init__(self, parent=None):
super(Test, self).__init__(parent)
self.setMinimumSize(200, 200)
self.buttonUpdate = QtGui.QPushButton()
self.buttonUpdate.setText("Get updates")
self.lbl1 = QtGui.QLabel()
self.lbl2 = QtGui.QLabel()
self.lblm2 = QtGui.QLabel()
gif = os.path.abspath("chassingarrows.gif")#throbber
self.movie = QtGui.QMovie(gif)
self.movie.setScaledSize(QtCore.QSize(20, 20))
self.pixmap = QtGui.QPixmap("checkmark.png")#green checkmark
self.pixmap2 = self.pixmap.scaled(20, 20)
verticalLayout = QtGui.QVBoxLayout(self)
h2 = QtGui.QHBoxLayout()
h2.addWidget(self.lblm2)
h2.addWidget(self.lbl2)
h2.setAlignment(QtCore.Qt.AlignCenter)
verticalLayout.addWidget(self.lbl1)
verticalLayout.addLayout(h2)
verticalLayout.addWidget(self.buttonUpdate, 0, QtCore.Qt.AlignRight)
self.buttonUpdate.clicked.connect(self.get_updates)
def get_updates(self):
try:
self.lbl1.setText("Updating")
self.lblm2.setMovie(self.movie)
self.movie.start()
self.setCursor(QtCore.Qt.BusyCursor)
p1 = subprocess.Popen(['apt', 'update'], stdout=subprocess.PIPE, bufsize=1)
p1.wait()
self.movie.stop()
self.lblm2.setPixmap(self.pixmap2)
self.unsetCursor()
self.lbl1.setText("Done update")
except subprocess.CalledProcessError, e:
print e.output
if __name__ == '__main__':
app = QtGui.QApplication(sys.argv)
test = Test()
test.show()
sys.exit(app.exec_())
輝煌的答案!不知道爲什麼我不能和Popen做同樣的事情,但這是一個完美的選擇。 – answerSeeker
@answerSeeker,你可以用'subprocess.Popen'來完成,但它需要另一個線程來等待子進程完成,這很麻煩。 – falsetru