python 笔记14 多窗口传递数据

多窗口传递数据 不使用信号及槽

D116.PY

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import  sys
from PyQt5.QtCore import *
from PyQt5.QtGui import *
from PyQt5.QtWidgets import *
from D11602 import Datedialog

class mwin(QWidget):
    def __init__(self, parent=None):
        super(mwin, self).__init__(parent)     # 为什么 PARENT？
        lay = QGridLayout(self)
        self.setWindowTitle("不使用信号和槽")
        self.lineEdit = QLineEdit(self)
        self.b1 = QPushButton("B1")
        self.b2 = QPushButton("B2")
        lay.addWidget(self.lineEdit)
        lay.addWidget(self.b1)
        lay.addWidget(self.b2)
        self.setLayout(lay)
        self.b1.clicked.connect(self.onb1click)
        self.b2.clicked.connect(self.onb2click)

    def onb1click(self):
        print("1123")
        dialog = Datedialog(self)
        lres = dialog.exec()
        Ldate = dialog.Fdatetime()
  
        if lres == QDialog.Accepted:
            print('点击确定按钮')
            self.lineEdit.setText(Ldate.toString())
        else:
            print('点击取消按钮')

        dialog.destroy()

    def onb2click(self):
        print("1234")
        ldate,ltime,lres = Datedialog.getdatetime()


        if lres == QDialog.Accepted:
            print('点击确定按钮')
            self.lineEdit.setText(ldate.toString())
        else:
            print('点击取消按钮')

      #  print(type(res1),"a",res1)

if __name__ =='__main__':
    qa = QApplication(sys.argv)
    mw = mwin()
    mw.show()
    sys.exit(qa.exec_())

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D11602.py
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class Datedialog(QDialog):
    def __init__(self,parent = None):
        super(Datedialog,self).__init__(parent)
        self.setWindowTitle("123")
        self.datetime = QDateTimeEdit(self)
        self.datetime.setCalendarPopup(True)
        self.datetime.setDateTime(QDateTime.currentDateTime())
        lay = QHBoxLayout(self)
        lay.addWidget(self.datetime)

        btns = QDialogButtonBox(QDialogButtonBox.Ok | QDialogButtonBox.Cancel, Qt.Horizontal, self)
        lay.addWidget(btns)
        btns.accepted.connect(self.accept)

        btns.rejected.connect(self.reject)


    def rab(self):
        return (res1)
    def Fdatetime(self):

        return self.datetime.dateTime()
    @staticmethod
    def getdatetime(parent = None):
        dialog = Datedialog(parent)       # 为什么？
        res = dialog.exec()
        udate = dialog.Fdatetime()
        return (udate.date(), udate.time(),res== QDialog.Accepted)


if __name__ =='__main__':
    qa = QApplication(sys.argv)
    mw = Datedialog()
    mw.show()
    sys.exit(qa.exec_())
多窗口传递数据 使用信号及槽

D117.py

import  sys
from PyQt5.QtCore import *
from PyQt5.QtGui import *
from PyQt5.QtWidgets import *
from D11702 import Datedialog

class mwin(QWidget):
    sigal_c = pyqtSignal(str)
    def __init__(self, parent=None):
        super(mwin, self).__init__(parent)
        lay = QGridLayout(self)
        self.resize(400,120)
        self.setWindowTitle("使用信号和槽")
        self.lineEdit_inner = QLineEdit(self)
        self.lineEdit_inner.setText("内置信号")
        self.lineEdit_emit = QLineEdit(self)
        self.lineEdit_emit.setText("自定义信号")
        self.b1 = QPushButton("获取内置信号时间")
        self.b2 = QPushButton("获取自定义信号时间")
        lay.addWidget(self.lineEdit_inner)
        lay.addWidget(self.lineEdit_emit)
        lay.addWidget(self.b1)
        lay.addWidget(self.b2)
        self.setLayout(lay)
        self.b1.clicked.connect(self.onb1click)
        self.b2.clicked.connect(self.onb2click)

    def onb1click(self):
        print("1123")
        dialog = Datedialog(self)
        dialog.datetime_innner.dateTimeChanged.connect(self.inner_solt)
        dialog.show()
    def inner_solt(self,date):
        self.lineEdit_inner.setText(date.toString())


    def onb2click(self):
        print("1234 ")
        dialog = Datedialog(self)
        dialog.sigal_1.connect(self.emit_solt)
        dialog.show()
    def emit_solt(self,datestr):
        self.lineEdit_emit.setText(datestr)

      #  print(type(res1),"a",res1)

if __name__ =='__main__':
    qa = QApplication(sys.argv)
    mw = mwin()
    mw.show()
    sys.exit(qa.exec_())
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D11702.PY
------------------------------------------------

import sys

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



class Datedialog(QDialog):
    sigal_1 = pyqtSignal(str)
    def __init__(self,parent = None):
        super(Datedialog,self).__init__(parent)
        self.setWindowTitle("使用信号与槽进行数据传递")
        self.datetime_innner = QDateTimeEdit(self)
        self.datetime_innner.setCalendarPopup(True)
        self.datetime_emit = QDateTimeEdit(self)
        self.datetime_emit.setCalendarPopup(True)
        self.datetime_innner.setDateTime(QDateTime.currentDateTime())
        self.datetime_emit.setDateTime(QDateTime.currentDateTime())
        lay = QGridLayout(self)
        lay.addWidget(self.datetime_innner)
        lay.addWidget(self.datetime_emit)

        btns = QDialogButtonBox(QDialogButtonBox.Ok | QDialogButtonBox.Cancel, Qt.Horizontal, self)
        lay.addWidget(btns)
        btns.accepted.connect(self.accept)

        btns.rejected.connect(self.reject)
        self.datetime_emit.dateTimeChanged.connect(self.emit_solt1)


    def Fdatetime(self):

        return self.datetime.dateTime()
    @staticmethod
    def getdatetime(parent = None):
        dialog = Datedialog(parent)
        res = dialog.exec()
        udate = dialog.Fdatetime()
        return (udate.date(), udate.time(),res== QDialog.Accepted)
    def emit_solt1(self):
        date_str = self.datetime_emit.dateTime().toString()
        self.sigal_1.emit(date_str)

if __name__ =='__main__':
    qa = QApplication(sys.argv)
    mw = Datedialog()
    mw.show()
    sys.exit(qa.exec_())
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总结：
定义信号 通过emit 传递参数给槽 触发槽