在我的示例程序中，我想显示我的gif直到我的进程完成。我的进程完成后，我的gif会自动关闭。为此，我在这里使用了线程功能，但是我无法显示gif。我不知道我在此程序中犯了什么错误，所以任何人都可以检查此程序并指导我。谢谢。 下面是我的代码：
import sys
from PyQt4 import QtGui
import os
class DialogThread(QtCore.QThread):
def __init__(self, interval=1):
self.interval = interval
thread = threading.Thread(target=self.run, args=())
thread.daemon = True # Daemonize thread
thread.start() # Start the execution
def run(self):
global savingDataFlag,dialog_gif
""" Method that runs forever """
while True:
if savingDataFlag == True:
dialog_gif.run()
print 'in saving data true loop'
else:
dialog_gif.close()
print 'in saving data false loop'
time.sleep(3)
class Dialog(QtGui.QDialog):
def __init__(self, parent = None):
super(Dialog, self).__init__(parent)
self.setStyleSheet("QDialog {background-color:black; color:white }")
self.label1 = QtGui.QLabel(
text="Please Wait while It Is Processing The Data...",
font=QtGui.QFont("Times", 20,weight=QtGui.QFont.Bold)
)
self.label21 = QtGui.QLabel()
vbox1 = QtGui.QVBoxLayout(self)
vbox1.addWidget(self.label1)
vbox1.addWidget(self.label21)
self.resize(640, 480)
@QtCore.pyqtSlot()
def show_gif(self):
movie = QtGui.QMovie(
"./img/loading1.gif",
parent=self
)
self.label21.setMovie(movie)
movie.start()
self.exec_()class Example(QtGui.QWidget):
def __init__(self):
super(Example, self).__init__()
self.initUI()
def initUI(self):
okButton = QtGui.QPushButton("Save")
cancelButton = QtGui.QPushButton("Cancel")
okButton.clicked.connect(self.save)
hbox = QtGui.QHBoxLayout()
hbox.addStretch(1)
hbox.addWidget(okButton)
hbox.addWidget(cancelButton)
vbox = QtGui.QVBoxLayout()
vbox.addStretch(1)
vbox.addLayout(hbox)
self.setLayout(vbox)
self.setGeometry(300, 300, 300, 150)
self.setWindowTitle('Buttons')
self.show()
def save(self):
self.d1 = QtGui.QWidget()
self.form1 = QtGui.QFormLayout(self.d1)
self.name_file = QtGui.QLabel(("File Name:"))
self.line_edit1 = QtGui.QLineEdit()
self.saveBtn1 = QtGui.QPushButton(("Save"))
self.saveBtn1.clicked.connect(self.saveModelWidget)
self.canclebtn = QtGui.QPushButton(("Cancel"))
self.form1.addRow(self.name_file, self.line_edit1)
self.form1.addRow( self.canclebtn,self.saveBtn1)
self.d1.setWindowTitle("Enter Grids")
self.d1.setGeometry(450,300,500,100)
self.d1.show()
def saveModelWidget(self):
self.savefile()
def savefile(self):
self.d1.close()
self.save_text = self.line_edit1.text()
self.currFilePath = os.getcwd()
if self.save_text.endsWith(".csv"):
file_Name= self.save_text
with open(file_Name, 'w+')as f:
dir_path1 =os.getcwd()
save_filename = os.path.join(dir_path1,file_Name)
print "prrocess start"
# here some execution
# when i click the save button i want to display the gif file till to complete the process in save file
print "process ends"
def main():
app = QtGui.QApplication(sys.argv)
ex = Example()
sys.exit(app.exec_())
if __name__ == '__main__':
main()
答案 0 :(得分：2)
您正在将QThread与线程模块一起使用，并且QThread不会使用它，因为它从不启动它，而是使用线程来执行run（）方法。另一方面，重写QThread的run方法是一种方法，但是有很多限制很多事情，相反，我将创建一个将驻留在另一个线程中的工作程序。另一个错误是movie是将被删除的本地变量，因此它将不会显示，解决方案是将其传递给父级。考虑上述解决方案是：
import os
import sys
import threading
from PyQt4 import QtCore, QtGui
class SaveWorker(QtCore.QObject):
started = QtCore.pyqtSignal()
finished = QtCore.pyqtSignal()
@QtCore.pyqtSlot(str)
def save_file(self, filename):
self.started.emit()
for i in range(100000):
print(i)
with open(filename, 'w+')as f:
print(filename)
# some execution
self.finished.emit()
class GifDialog(QtGui.QDialog):
def __init__(self, parent = None):
super(GifDialog, self).__init__(parent)
self.setStyleSheet("QDialog {background-color:black; color:white }")
self.label1 = QtGui.QLabel(
text="Please Wait while It Is Processing The Data...",
font=QtGui.QFont("Times", 20,weight=QtGui.QFont.Bold)
)
self.label2 = QtGui.QLabel()
vbox = QtGui.QVBoxLayout(self)
vbox.addWidget(self.label1)
vbox.addWidget(self.label2)
@QtCore.pyqtSlot()
def show_gif(self):
movie = QtGui.QMovie(
"./img/loading1.gif",
parent=self
)
self.label2.setMovie(movie)
movie.start()
self.show()
class FormDialog(QtGui.QDialog):
def __init__(self, parent=None):
super(FormDialog, self).__init__(parent)
self.setWindowTitle("Enter Grids")
self.line_edit = QtGui.QLineEdit()
self.savebtn = QtGui.QPushButton(
text="Save",
clicked=self.save
)
self.cancelbtn = QtGui.QPushButton("Cancel")
#self.savebtn.clicked.connect(self.saveModelWidget)
flay = QtGui.QFormLayout(self)
flay.addRow("File Name:", self.line_edit)
flay.addRow(self.cancelbtn, self.savebtn)
self.worker = SaveWorker()
self.gif_dialog = GifDialog(self)
self.worker.started.connect(self.gif_dialog.show_gif)
self.worker.finished.connect(self.close)
@QtCore.pyqtSlot()
def save(self):
filename = str(self.line_edit.text())
if filename.endswith(".csv"):
save_filename = os.path.join(os.getcwd(), filename)
thread = threading.Thread(target=self.worker.save_file, args=(save_filename,))
thread.daemon = True
thread.start()
class Example(QtGui.QWidget):
def __init__(self):
super(Example, self).__init__()
self.initUI()
def initUI(self):
okButton = QtGui.QPushButton(
text="Save",
clicked=self.on_clicked
)
cancelButton = QtGui.QPushButton("Cancel")
# okButton.clicked.connect(self.save)
hbox = QtGui.QHBoxLayout()
hbox.addStretch(1)
hbox.addWidget(okButton)
hbox.addWidget(cancelButton)
vbox = QtGui.QVBoxLayout(self)
vbox.addStretch(1)
vbox.addLayout(hbox)
@QtCore.pyqtSlot()
def on_clicked(self):
dialog = FormDialog()
dialog.exec_()
def main():
app = QtGui.QApplication(sys.argv)
dialog = Example()
dialog.show()
sys.exit(app.exec_())
if __name__ == '__main__':
main()