pyqt5 实现在别的窗口弹出进度条
要求:在导入视频的同时,利用caffe训练好的模型提取视频的特征,这个过程比较费时间,因此需要进度条,不然以为程序死掉了。
在条用进度条出现的问题有:
1、进度条窗口可以弹出但是没有进度条、label、button等
2、进度条窗口内容完整,但是进度条的进度没有更新
3、进度条以上问题解决了,但在进度条窗口close()后,程序出现未响应现象。
问题一:
区分show, exec_区别
问题二:
Thread.msleep(100),模拟100个文件
问题三:某个循环出了问题,while......
进度条对话框:
# -*- coding: utf-8 -*- ##set progressbar from PyQt5.QtWidgets import QApplication,QWidget,QDialog,QLabel,QLineEdit,QProgressBar,\ QPushButton,QVBoxLayout,QHBoxLayout,QGridLayout,QDialogButtonBox from PyQt5.QtCore import Qt, QBasicTimer, QThread import sys class ProgressBar(QDialog): def __init__(self, fileIndex,filenum,parent = None): super(ProgressBar, self).__init__(parent) self.resize(350,100) self.setWindowTitle(self.tr("Processing progress")) self.TipLabel = QLabel(self.tr("Processing:" + " " + str(fileIndex) + "/" + str(filenum))) self.FeatLabel = QLabel(self.tr("Extract feature:")) self.FeatProgressBar = QProgressBar(self) self.FeatProgressBar.setMinimum(0) self.FeatProgressBar.setMaximum(100) #总进程换算为100
self.FeatProgressBar.setValue(0) #进度条初始值为0 TipLayout = QHBoxLayout() TipLayout.addWidget(self.TipLabel) FeatLayout = QHBoxLayout() FeatLayout.addWidget(self.FeatLabel) FeatLayout.addWidget(self.FeatProgressBar) # self.startButton = QPushButton('start',self) self.cancelButton = QPushButton('cancel', self) # self.cancelButton.setFocusPolicy(Qt.NoFocus) buttonlayout = QHBoxLayout() buttonlayout.addStretch(1) buttonlayout.addWidget(self.cancelButton) # buttonlayout.addStretch(1) # buttonlayout.addWidget(self.startButton) layout = QVBoxLayout() # layout = QGridLayout() layout.addLayout(FeatLayout) layout.addLayout(TipLayout) layout.addLayout(buttonlayout) self.setLayout(layout) self.show() # self.startButton.clicked.connect(self.setValue) self.cancelButton.clicked.connect(self.onCancel) # self.startButton.clicked.connect(self.onStart) # self.timer = QBasicTimer() # self.step = 0 def setValue(self,value): self.FeatProgressBar.setValue(value) def onCancel(self,event): self.close() def main(): app = QApplication(sys.argv) fileIndex = '3' #当前正在处理第几个文件 filenum = '10' #文件总数,在label中显示 progress = ProgressBar(fileIndex,filenum,0) progress.show() app.exec_() if __name__ == '__main__': main()
在程序中弹出对对话框:
self.ProgressBar = ProgressDialog.ProgressBar(self.FileIndex,self.VideoNum)
for i in range(n*step,(n+1)*step): # time.sleep(0.05) self.ProgressBar.setValue(i+1) #更新进度条的值 QThread.msleep(int(self.ratio*100)) #模拟文件传送,进度条可以一点点增加,而不是一下增加很多,也可以不需要 QApplication.processEvents() #实时显示
self.ProgressBar.close() #记得关闭进度条
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