我需要一个非阻塞GUI解决方案来运行未定义数量的系统命令(比如一个bash脚本,它接受一些参数作为输入),监控这些命令的状态。(例如:正在运行/已完成)和终止(终止)进程。在
例如:
从列表中选择应用程序(QComboBox)
设置参数(QLineEdit)
运行它(QProcess)
运行时,附加:
作为QTableWidget中的行
。。我正在寻找一个解决方案来监视每个命令的状态。在
应用程序可以是这样一个简单的脚本:
class runcommands(QWidget):
def __init__(self, parent=None):
super(runcommands, self).__init__(parent)
layout = QFormLayout()
self.commandlist = QComboBox()
self.param = QLineEdit()
self.runit = QToolButton()
self.runit.setText('run')
self.runit.clicked.connect(self.runcommand)
self.commandlist.addItems(['simplerun.py', 'simplerun2.py'])
self.table = QTableWidget()
self.table.setColumnCount(5)
self.model = QStandardItemModel()
self.table.setHorizontalHeaderLabels(['Process', 'Parameter', 'STDOut', 'Status', 'Kill'])
self.rowcount = 0
layout.addRow(self.commandlist)
layout.addRow(self.param)
layout.addRow(self.runit)
layout.addRow(self.table)
self.setLayout(layout)
self.setWindowTitle("Run & Monitor")
self.commandrunning=0
self.mylistofprocesses=[]
def runcommand(self):
# add a record in the QTableWidget
# updating its row number at each run
self.rowcount = self.rowcount + 1
self.table.setRowCount(self.rowcount)
# add column 0: command string
self.c1 = QTableWidgetItem()
self.c1.setText("%s" % os.path.join(os.getcwd(), self.commandlist.currentText()))
self.table.setItem(self.rowcount - 1, 0, self.c1)
# add column 1: parameter string
self.c2 = QTableWidgetItem()
self.c2.setText("%s" % self.param.text())
self.table.setItem(self.rowcount - 1, 1, self.c2)
# add column 2 to store the Process StandardOutput
stdout_item = QTableWidgetItem()
self.table.setItem(self.rowcount - 1, 2, stdout_item)
# add column 3: index to store the process status (0: Not Running, 1: Starting, 2: Running)
status_item = QTableWidgetItem()
self.table.setItem(self.rowcount - 1, 3, status_item)
# add column 4: kill button to kill the relative process
killbtn = QPushButton(self.table)
killbtn.setText('Kill')
self.table.setCellWidget(self.rowcount - 1, 4, killbtn)
# Initiate a QProcess running a system command
process = QtCore.QProcess()
command = 'python3' + ' ' + os.getcwd() + '/' + self.commandlist.currentText() + ' ' + self.param.text()
process.setProcessChannelMode(QtCore.QProcess.MergedChannels)
# connect the stdout_item to the Process StandardOutput
# it gets constantly update as the process emit std output
process.readyReadStandardOutput.connect(lambda: stdout_item.setText(str(process.readAllStandardOutput().data().decode('utf-8'))))
# start the process
process.start(command)
# this was supposed to add the process status in the relative column ... BUT it DOESN'T do it
status_item.setText(str(process.ProcessState()))
# connect the kill button to the process.kill method, to stop the process
killbtn.clicked.connect(process.kill)
killbtn.clicked.connect(lambda: killbtn.setText('Killed'))
# this was supposed to 'UPDATE' the process status (from running to stoppted) in the relative column ... BUT it DOESN'T do it
killbtn.clicked.connect(lambda: status_item.setText(str(process.ProcessState())))
# append the process to a list so that it doesn't get destroyed at each run
self.mylistofprocesses.append(process)
def main():
app = QApplication(sys.argv)
ex = runcommands()
ex.show()
sys.exit(app.exec_())
if __name__ == '__main__':
main()
多亏了Avaris对IRC的帮助,我修复了将表中的每一行连接到单独进程的主要问题。在
在对原始问题进行了一些编辑之后,我清理了一点代码,并添加了一个按钮来停止/终止一个进程。在
为了完成这个示例任务,我需要实现对所有活动进程的监视,并在第4列的表中更新它们的状态“实时”(除了打印std输出第3列)。在
我试着用:
^{pr2}$但我不能让它工作。在
必须使用
stateChanged
信号:截图:
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