2020年新年大赛！

Question

finally

Asked:2020-11-10 23:15:42 +0000 UTC2020-11-10 23:15:42 +0000 UTC 2020-11-10 23:15:42 +0000 UTC

将数据从一个类的一个 \lineEdit\textView 变量传递到另一个类的另一个变量

772

MessageWindow 类的前面：

from PySide2 import QtCore, QtGui, QtWidgets

class Ui_message_window(object):
    def setupUi(self, message_window):
        message_window.setObjectName("message_window")
        message_window.resize(506, 286)
        message_window.setMinimumSize(QtCore.QSize(506, 236))
        message_window.setMaximumSize(QtCore.QSize(506, 286))
        self.line_title = QtWidgets.QLineEdit(message_window)
        self.line_title.setGeometry(QtCore.QRect(90, 10, 411, 31))
        self.line_title.setMinimumSize(QtCore.QSize(0, 0))
        font = QtGui.QFont()
        font.setFamily("Consolas")
        font.setPointSize(20)
        self.line_title.setFont(font)
        self.line_title.setObjectName("line_title")
        self.label = QtWidgets.QLabel(message_window)
        self.label.setGeometry(QtCore.QRect(10, 10, 91, 31))
        font = QtGui.QFont()
        font.setFamily("Consolas")
        font.setPointSize(20)
        self.label.setFont(font)
        self.label.setObjectName("label")
        self.window_text = QtWidgets.QTextEdit(message_window)
        self.window_text.setGeometry(QtCore.QRect(10, 50, 491, 181))
        font = QtGui.QFont()
        font.setFamily("Consolas")
        font.setPointSize(16)
        self.window_text.setFont(font)
        self.window_text.setObjectName("window_text")
        self.button_confirm = QtWidgets.QPushButton(message_window)
        self.button_confirm.setGeometry(QtCore.QRect(10, 240, 491, 41))
        font = QtGui.QFont()
        font.setFamily("Consolas")
        font.setPointSize(20)
        self.button_confirm.setFont(font)
        self.button_confirm.setObjectName("button_confirm")

        self.retranslateUi(message_window)
        QtCore.QMetaObject.connectSlotsByName(message_window)

    def retranslateUi(self, message_window):
        message_window.setWindowTitle(QtWidgets.QApplication.translate("message_window", "Form", None, -1))
        self.label.setText(QtWidgets.QApplication.translate("message_window", "Title", None, -1))
        self.button_confirm.setText(QtWidgets.QApplication.translate("message_window", "Confirm", None, -1))

Main 类的前面：

from PySide2 import QtCore, QtGui, QtWidgets

class Ui_NoteList(object):
    def setupUi(self, NoteList):
        NoteList.setObjectName("NoteList")
        NoteList.resize(560, 645)
        NoteList.setMinimumSize(QtCore.QSize(560, 645))
        NoteList.setMaximumSize(QtCore.QSize(560, 645))
        self.centralwidget = QtWidgets.QWidget(NoteList)
        self.centralwidget.setObjectName("centralwidget")
        self.label = QtWidgets.QLabel(self.centralwidget)
        self.label.setGeometry(QtCore.QRect(10, 10, 171, 31))
        font = QtGui.QFont()
        font.setFamily("Consolas")
        font.setPointSize(20)
        self.label.setFont(font)
        self.label.setObjectName("label")
        self.label_2 = QtWidgets.QLabel(self.centralwidget)
        self.label_2.setGeometry(QtCore.QRect(10, 50, 161, 31))
        font = QtGui.QFont()
        font.setFamily("Consolas")
        font.setPointSize(20)
        self.label_2.setFont(font)
        self.label_2.setObjectName("label_2")
        self.line_login = QtWidgets.QLineEdit(self.centralwidget)
        self.line_login.setGeometry(QtCore.QRect(180, 10, 201, 31))
        font = QtGui.QFont()
        font.setFamily("Consolas")
        font.setPointSize(20)
        self.line_login.setFont(font)
        self.line_login.setObjectName("line_login")
        self.line_password = QtWidgets.QLineEdit(self.centralwidget)
        self.line_password.setGeometry(QtCore.QRect(180, 50, 201, 31))
        font = QtGui.QFont()
        font.setFamily("Consolas")
        font.setPointSize(20)
        self.line_password.setFont(font)
        self.line_password.setObjectName("line_password")
        self.button_log = QtWidgets.QPushButton(self.centralwidget)
        self.button_log.setGeometry(QtCore.QRect(390, 10, 161, 31))
        font = QtGui.QFont()
        font.setFamily("Consolas")
        font.setPointSize(16)
        self.button_log.setFont(font)
        self.button_log.setObjectName("button_log")
        self.button_sign = QtWidgets.QPushButton(self.centralwidget)
        self.button_sign.setGeometry(QtCore.QRect(390, 50, 161, 31))
        font = QtGui.QFont()
        font.setFamily("Consolas")
        font.setPointSize(16)
        self.button_sign.setFont(font)
        self.button_sign.setObjectName("button_sign")
        self.button_add = QtWidgets.QPushButton(self.centralwidget)
        self.button_add.setGeometry(QtCore.QRect(10, 90, 161, 31))
        font = QtGui.QFont()
        font.setFamily("Consolas")
        font.setPointSize(16)
        self.button_add.setFont(font)
        self.button_add.setObjectName("button_add")
        self.button_delete = QtWidgets.QPushButton(self.centralwidget)
        self.button_delete.setGeometry(QtCore.QRect(180, 90, 201, 31))
        font = QtGui.QFont()
        font.setFamily("Consolas")
        font.setPointSize(16)
        self.button_delete.setFont(font)
        self.button_delete.setObjectName("button_delete")
        self.button_edit = QtWidgets.QPushButton(self.centralwidget)
        self.button_edit.setGeometry(QtCore.QRect(390, 90, 161, 31))
        font = QtGui.QFont()
        font.setFamily("Consolas")
        font.setPointSize(16)
        self.button_edit.setFont(font)
        self.button_edit.setObjectName("button_edit")
        self.table_w = QtWidgets.QTableWidget(self.centralwidget)
        self.table_w.setGeometry(QtCore.QRect(10, 130, 541, 491))
        self.table_w.setObjectName("table_w")
        self.table_w.setColumnCount(3)
        self.table_w.setRowCount(0)
        item = QtWidgets.QTableWidgetItem()
        self.table_w.setHorizontalHeaderItem(0, item)
        item = QtWidgets.QTableWidgetItem()
        self.table_w.setHorizontalHeaderItem(1, item)
        item = QtWidgets.QTableWidgetItem()
        self.table_w.setHorizontalHeaderItem(2, item)
        NoteList.setCentralWidget(self.centralwidget)
        self.statusbar = QtWidgets.QStatusBar(NoteList)
        self.statusbar.setObjectName("statusbar")
        NoteList.setStatusBar(self.statusbar)

        self.retranslateUi(NoteList)
        QtCore.QMetaObject.connectSlotsByName(NoteList)

    def retranslateUi(self, NoteList):
        NoteList.setWindowTitle(QtWidgets.QApplication.translate("NoteList", "MainWindow", None, -1))
        self.label.setText(QtWidgets.QApplication.translate("NoteList", "LOGIN", None, -1))
        self.label_2.setText(QtWidgets.QApplication.translate("NoteList", "PASSWORD", None, -1))
        self.button_log.setText(QtWidgets.QApplication.translate("NoteList", "LOG IN", None, -1))
        self.button_sign.setText(QtWidgets.QApplication.translate("NoteList", "SIGN UP", None, -1))
        self.button_add.setText(QtWidgets.QApplication.translate("NoteList", "ADD", None, -1))
        self.button_delete.setText(QtWidgets.QApplication.translate("NoteList", "DELETE", None, -1))
        self.button_edit.setText(QtWidgets.QApplication.translate("NoteList", "EDIT", None, -1))
        self.table_w.horizontalHeaderItem(0).setText(QtWidgets.QApplication.translate("NoteList", "Date", None, -1))
        self.table_w.horizontalHeaderItem(1).setText(QtWidgets.QApplication.translate("NoteList", "Title", None, -1))
        self.table_w.horizontalHeaderItem(2).setText(QtWidgets.QApplication.translate("NoteList", "Text", None, -1))

主.py：

from frontend import *
from front_reg import Ui_reg_window
from message_window import Ui_message_window
from PySide2.QtWidgets import QMessageBox

from xml.etree import ElementTree as ET

import sys


class MessageWindow(QtWidgets.QWidget, Ui_message_window):

    def __init__(self, parent=None):
        super(MessageWindow, self).__init__(parent)
        self.setupUi(self)

        self.parent = parent

        self.button_confirm.clicked.connect(self.buttonConfirm)

    def buttonConfirm(self):
        self.parent.title = self.line_title.text()
        self.parent.text = self.window_text.toPlainText()


class Main(QtWidgets.QMainWindow, Ui_NoteList):

    LOGGED = False

    def __init__(self, parent=None):
        super(Main, self).__init__(parent)
        self.setupUi(self)

        # try:
        #     tree = ET.parse('data.xml')
        #     self.root = tree.getroot()
        # except:
        #     with open('data.xml'):
        #         root = ET.Element('datalist')
        #         tree = ET.ElementTree(root)
        #         tree.write('data.xml')
        #         self.root = ET.parse('data.xml').getroot()

        self.table_w.setRowCount(15)
        self.table_w.setColumnCount(3)
        self.table_w.horizontalHeader().setStretchLastSection(True)

        # Установите ширину нужного вам столбца
        self.table_w.setColumnWidth(0, 70)
        self.table_w.setColumnWidth(1, 100)

        # Это свойство содержит политику переноса текста в элементе
        self.table_w.setWordWrap(False)

        # self.table_w.setEditTriggers(QtWidgets.QAbstractItemView.NoEditTriggers)
        # self.table_w.setItem(0, 0, QtWidgets.QTableWidgetItem("12.12.3012"))
        # self.table_w.setItem(0, 1, QtWidgets.QTableWidgetItem("Редактирование невозможно."))

        self.table_w.verticalHeader().setDefaultSectionSize(33)
        self.table_w.setAlternatingRowColors(True)

        self.line_password.setEchoMode(QtWidgets.QLineEdit.Password)
        self.line_password.setMaxLength(13)

        self.button_log.clicked.connect(self.buttonLog)
        self.button_sign.clicked.connect(self.buttonReg)
        self.button_add.clicked.connect(self.buttonAdd)

    # def buttonLog(self):
    #     self.login = self.line_login.text()
    #     self.password = self.line_password.text()
    #     for person in self.root.iter('person'):
    #         if self.login not in [person.attrib['login'] for person in self.root.iter('person')]:
    #             message = QtWidgets.QMessageBox()
    #             message.setWindowTitle('Bad')
    #             message.setText('Wrong login')
    #             message.setIcon(message.Warning)
    #             message.exec()
    #             break
    #         if person.attrib['login'] == self.login and person.attrib['password'] == self.password:
    #             message = QtWidgets.QMessageBox()
    #             message.setWindowTitle('Good')
    #             message.setText('Log In Successful')
    #             message.setIcon(message.Information)
    #             message.exec()
    #             self.LOGGED = True
    #             break

    # def buttonReg(self):
    #     self.window = RegWindow()
    #     self.window.show()
    #     # print(self.window.login, self.window.password)

    def buttonAdd(self):
        self.win = MessageWindow()
        self.win.show()

if __name__ == '__main__':
    app = QtWidgets.QApplication(sys.argv)
    win = Main()
    win.show()
    sys.exit(app.exec_())

Essence：单击时ADD，会打开一个窗口，您可以在其中输入注释的标题和文本。

我想得到的是：这样当您单击从Main 类调用的MessageWindowConfirm类的打开窗口时， MessageWindow 类的两个窗口中的文本将写入此Main类中的变量，即

self.title = lineEdit из MessageWindow

self.text = textView из MessageWindow

也就是说，当用户输入一个注释并单击确认时，该注释的标题和文本将保存在类中Main以供进一步工作。

1 个回答

Voted

S. Nick · Answer 1 · 2020-11-11T01:05:29Z

如果我理解正确，它可能看起来像这样：

import sys
from PyQt5.QtWidgets import *
from PyQt5.QtCore import *
from PyQt5.QtGui import *
from PyQt5 import QtCore, QtGui, QtWidgets


class MessageWindow(QtWidgets.QWidget): #, Ui_message_window):
    def __init__(self, parent=None):
        super(MessageWindow, self).__init__(parent)
#        self.setupUi(self)

        self.parent = parent                                           # ! parent
        self.setWindowFlags(Qt.Window | Qt.WindowStaysOnTopHint)       # ! Qt.Window
        self.setWindowTitle("MessageWindow")

        self.line_title = QLineEdit()
        self.window_text = QTextEdit()

        self.button_confirm = QPushButton("button_confirm")
        self.button_confirm.clicked.connect(self.buttonConfirm)

        layout = QGridLayout(self)
        layout.addWidget(self.line_title)  
        layout.addWidget(self.window_text)
        layout.addWidget(self.button_confirm)

    def buttonConfirm(self):
#        self.title = self.line_title.text()
#        self.text = self.window_text.toPlainText()

        self.parent.lineEdit.setText(self.line_title.text())             # +++
        self.parent.textEdit.setText(self.window_text.toPlainText())     # +++
        self.hide()                                                      # +++


class Main(QtWidgets.QMainWindow): #, Ui_NoteList):
    def __init__(self, parent=None):
        super(Main, self).__init__(parent)
#        self.setupUi(self)

        centralWidget = QWidget()
        self.setCentralWidget(centralWidget)

        self.lineEdit = QLineEdit()
        self.textEdit = QTextEdit()

        self.button = QPushButton("button")
        self.button.clicked.connect(self.buttonAdd)   

        layout = QGridLayout(centralWidget)
        layout.addWidget(self.lineEdit)  
        layout.addWidget(self.textEdit)
        layout.addWidget(self.button)


    def buttonAdd(self):
        self.win = MessageWindow(self)                                   # ! self
        self.win.show()


if __name__ == '__main__':
    app = QApplication(sys.argv) 
    w = Main()
    w.setWindowTitle("Main")
    w.show()
    sys.exit(app.exec_())

如何从 Main 访问这些数据？

import sys
from PyQt5.QtWidgets import *
from PyQt5.QtCore import *
from PyQt5.QtGui import *
from PyQt5 import QtCore, QtGui, QtWidgets


class MessageWindow(QtWidgets.QWidget): 
    def __init__(self, parent=None):
        super(MessageWindow, self).__init__(parent)
#        self.setupUi(self)

        self.parent = parent                                           
        self.setWindowFlags(Qt.Window | Qt.WindowStaysOnTopHint)       
        self.setWindowTitle("MessageWindow")

        self.line_title = QLineEdit()
        self.window_text = QTextEdit()

        self.button_confirm = QPushButton("button_confirm")
        self.button_confirm.clicked.connect(self.buttonConfirm)

        layout = QGridLayout(self)
        layout.addWidget(self.line_title)  
        layout.addWidget(self.window_text)
        layout.addWidget(self.button_confirm)

    def buttonConfirm(self):
        self.parent.lineEdit.setText(self.line_title.text())             
        self.parent.textEdit.setText(self.window_text.toPlainText())     
        self.hide()                                                      


class Main(QtWidgets.QMainWindow): #, Ui_NoteList):
    def __init__(self, parent=None):
        super(Main, self).__init__(parent)
#        self.setupUi(self)

        centralWidget = QWidget()
        self.setCentralWidget(centralWidget)

        self.lineEdit = QLineEdit()
        self.textEdit = QTextEdit()

        self.button = QPushButton("button") 
        self.button.clicked.connect(self.buttonAdd)  
        self.button2 = QPushButton("button2") 
        self.button2.clicked.connect(self.buttonAdd2) 

        layout = QGridLayout(centralWidget)
        layout.addWidget(self.lineEdit)  
        layout.addWidget(self.textEdit)
        layout.addWidget(self.button)
        layout.addWidget(self.button2)

    def buttonAdd(self):
        self.win = MessageWindow(self)                                   
        self.win.show()

    def buttonAdd2(self):
        self.lineEdit.setText(self.win.line_title.text())             # +++
        self.textEdit.setText(self.win.window_text.toPlainText())     # +++   


if __name__ == '__main__':
    app = QApplication(sys.argv) 
    w = Main()
    w.setWindowTitle("Main")
    w.show()
    sys.exit(app.exec_())

改变了问题的重点...

问题的本质没有改变。您还需要初始化类中self.title的变量self.textMain

您需要了解没有父级的小部件是一个窗口。但是由于需要在child中重新定义父widget变量的值，所以需要传递parent self.win = MessageWindow(self)，但是为了让widget保持窗口，必须包含flag Qt.Window。

. . .
class MessageWindow(QtWidgets.QWidget, Ui_message_window):

    def __init__(self, parent=None):
        super(MessageWindow, self).__init__(parent)
        self.setupUi(self)

        self.parent = parent
        self.setWindowFlags(Qt.Window | Qt.WindowStaysOnTopHint)        # +

        self.button_confirm.clicked.connect(self.buttonConfirm)

    def buttonConfirm(self):
        self.parent.title = self.line_title.text()
        self.parent.text = self.window_text.toPlainText()
        self.hide()                                                     # +


class Main(QtWidgets.QMainWindow, Ui_NoteList):
    LOGGED = False
    def __init__(self, parent=None):
        super(Main, self).__init__(parent)
        self.setupUi(self)

        self.title = ''                                                 # +
        self.text = ''                                                  # +
        self.button_edit.clicked.connect(self.onClickedEdit)            # +

        self.table_w.setRowCount(15)
        self.table_w.setColumnCount(3)
        self.table_w.horizontalHeader().setStretchLastSection(True)
        # Установите ширину нужного вам столбца
        self.table_w.setColumnWidth(0, 70)
        self.table_w.setColumnWidth(1, 100)
        # Это свойство содержит политику переноса текста в элементе
        self.table_w.setWordWrap(False)
        self.table_w.verticalHeader().setDefaultSectionSize(33)
        self.table_w.setAlternatingRowColors(True)
        self.line_password.setEchoMode(QtWidgets.QLineEdit.Password)
        self.line_password.setMaxLength(13)
        self.button_add.clicked.connect(self.buttonAdd)

    def buttonAdd(self):
        self.win = MessageWindow(self)                                  # + self
        self.win.show()


    def onClickedEdit(self):                                            # +
        self.label.setText(self.title)
        self.label_2.setText(self.text)

if __name__ == '__main__':
    app = QtWidgets.QApplication(sys.argv)
    win = Main()
    win.show()
    sys.exit(app.exec_())

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1 个回答

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