from PyQt5.QtWidgets import QDialog, QFormLayout, QLineEdit, QComboBox, QDialogButtonBox, QApplication

import sys

class AreaSettingWidget(QDialog):
    def __init__(self, parent=None):
        super().__init__(parent)
        self.initUI()
    def initUI(self):
        layout = QFormLayout()
        varType = QComboBox()
        varType.addItems(['AI', 'AO', 'DI', 'DO'])
        varType.setObjectName('varType')

        channelNums = QLineEdit()
        channelNums.setObjectName('channelNums')

        channelBytes = QLineEdit()
        channelBytes.setObjectName('channelBytes')



        layout.addRow('协议类型：', varType)
        layout.addRow('通道数：', channelNums)
        layout.addRow("字节长度:", channelBytes)


        button_box = QDialogButtonBox(QDialogButtonBox.Ok | QDialogButtonBox.Cancel)
        button_box.accepted.connect(self.accept)
        button_box.rejected.connect(self.reject)

        layout.addRow(button_box)

        self.setLayout(layout)
        self.setWindowTitle("通道配置")

    def getParameters(self):
        varType = self.findChild(QComboBox, "varType").currentText()
        channelNums = self.findChild(QLineEdit, "channelNums").text()
        channelBytes = self.findChild(QLineEdit, "channelBytes").text()

        return varType, channelNums, channelBytes

if __name__ == '__main__':
    app = QApplication(sys.argv)
    window = AreaSettingWidget()
    window.show()
    sys.exit(app.exec_())