python3+PyQt5+Qt Designer如何实现扩展对话框

小编给大家分享一下python3+PyQt5+Qt Designer如何实现扩展对话框，希望大家阅读完这篇文章之后都有所收获，下面让我们一起去探讨吧！

第一部分无借用Qt Designer，完全用代码实现。
第二部分则借用Qt Designer，快速实现。

第一部分：

import sys from PyQt5.QtCore import Qt,pyqtSignal from PyQt5.QtWidgets import (QApplication, QCheckBox, QDialog, QFrame,   QGridLayout, QHBoxLayout, QLabel, QLayout, QLineEdit,   QPushButton, QVBoxLayout) class FindAndReplaceDlg(QDialog):  find = pyqtSignal(str,bool,bool,bool,bool,bool)  replace = pyqtSignal(str,str,bool,bool,bool,bool,bool)    def __init__(self, parent=None):   super(FindAndReplaceDlg, self).__init__(parent)   findLabel = QLabel("Find &what:")   self.findLineEdit = QLineEdit()   findLabel.setBuddy(self.findLineEdit)   replaceLabel = QLabel("Replace w&ith:")   self.replaceLineEdit = QLineEdit()   replaceLabel.setBuddy(self.replaceLineEdit)   self.caseCheckBox = QCheckBox("&Case sensitive")   self.wholeCheckBox = QCheckBox("Wh&ole words")   self.wholeCheckBox.setChecked(True)   self.moreFrame = QFrame()   self.moreFrame.setFrameStyle(QFrame.StyledPanel|QFrame.Sunken)   self.backwardsCheckBox = QCheckBox("Search &Backwards")   self.regexCheckBox = QCheckBox("Regular E&xpression")   self.ignoreNotesCheckBox = QCheckBox("Ignore foot&notes "              "and endnotes")   line = QFrame()   line.setFrameStyle(QFrame.VLine|QFrame.Sunken)   self.findButton = QPushButton("&Find")   self.replaceButton = QPushButton("&Replace")   closeButton = QPushButton("Close")   self.moreButton = QPushButton("&More")   self.moreButton.setCheckable(True)   gridLayout = QGridLayout()   gridLayout.addWidget(findLabel, 0, 0)   gridLayout.addWidget(self.findLineEdit, 0, 1)   gridLayout.addWidget(replaceLabel, 1, 0)   gridLayout.addWidget(self.replaceLineEdit, 1, 1)   frameLayout = QVBoxLayout()   frameLayout.addWidget(self.backwardsCheckBox)   frameLayout.addWidget(self.regexCheckBox)   frameLayout.addWidget(self.ignoreNotesCheckBox)   self.moreFrame.setLayout(frameLayout)   leftLayout = QVBoxLayout()   leftLayout.addLayout(gridLayout)   leftLayout.addWidget(self.caseCheckBox)   leftLayout.addWidget(self.wholeCheckBox)   leftLayout.addWidget(self.moreFrame)   buttonLayout = QVBoxLayout()   buttonLayout.addWidget(self.findButton)   buttonLayout.addWidget(self.replaceButton)   buttonLayout.addWidget(closeButton)   buttonLayout.addWidget(self.moreButton)   buttonLayout.addStretch()   mainLayout = QHBoxLayout()   mainLayout.addLayout(leftLayout)   mainLayout.addWidget(line)   mainLayout.addLayout(buttonLayout)   self.setLayout(mainLayout)   self.moreFrame.hide()   mainLayout.setSizeConstraint(QLayout.SetFixedSize)   self.moreButton.toggled[bool].connect(self.setvisible)   self.findLineEdit.textEdited.connect(self.updateUi)   self.findButton.clicked.connect(self.findClicked)   self.replaceButton.clicked.connect(self.replaceClicked)   self.updateUi()   self.setWindowTitle("Find and Replace")  def setvisible(self,YN):   self.moreFrame.setVisible(YN)  def findClicked(self):   self.find.emit(self.findLineEdit.text(),     self.caseCheckBox.isChecked(),     self.wholeCheckBox.isChecked(),     self.backwardsCheckBox.isChecked(),     self.regexCheckBox.isChecked(),     self.ignoreNotesCheckBox.isChecked())  def replaceClicked(self):   self.replace.emit(self.findLineEdit.text(),     self.replaceLineEdit.text(),     self.caseCheckBox.isChecked(),     self.wholeCheckBox.isChecked(),     self.backwardsCheckBox.isChecked(),     self.regexCheckBox.isChecked(),     self.ignoreNotesCheckBox.isChecked())  def updateUi(self):   enable = self.findLineEdit.text()   self.findButton.setEnabled(bool(enable))   self.replaceButton.setEnabled(bool(enable)) if __name__ == "__main__":  def find(what, *args):   print("Find {0} {1}".format(what, [x for x in args]))  def replace(old, new, *args):   print("Replace {0} with {1} {2}".format(     old, new, [x for x in args]))  app = QApplication(sys.argv)  form = FindAndReplaceDlg()  form.find.connect(find)  form.replace.connect(replace)    form.show()  app.exec_()

第二部分：

/home/yrd/eric_workspace/chap09/findandreplacedlg/Ui_findandreplacedlg.py

# -*- coding: utf-8 -*- # Form implementation generated from reading ui file '/home/yrd/eric_workspace/chap09/findandreplacedlg/findandreplacedlg.ui' # # Created by: PyQt5 UI code generator 5.7 # # WARNING! All changes made in this file will be lost! from PyQt5 import QtCore, QtGui, QtWidgets class Ui_FindAndReplaceDlg(object):  def setupUi(self, FindAndReplaceDlg):   FindAndReplaceDlg.setObjectName("FindAndReplaceDlg")   FindAndReplaceDlg.resize(355, 274)   self.mainlayout = QtWidgets.QHBoxLayout(FindAndReplaceDlg)   self.mainlayout.setSizeConstraint(QtWidgets.QLayout.SetFixedSize)   self.mainlayout.setContentsMargins(9, 9, 9, 9)   self.mainlayout.setSpacing(6)   self.mainlayout.setObjectName("mainlayout")   self.vboxlayout = QtWidgets.QVBoxLayout()   self.vboxlayout.setContentsMargins(0, 0, 0, 0)   self.vboxlayout.setSpacing(6)   self.vboxlayout.setObjectName("vboxlayout")   self.gridlayout = QtWidgets.QGridLayout()   self.gridlayout.setContentsMargins(0, 0, 0, 0)   self.gridlayout.setSpacing(6)   self.gridlayout.setObjectName("gridlayout")   self.replaceLineEdit = QtWidgets.QLineEdit(FindAndReplaceDlg)   self.replaceLineEdit.setObjectName("replaceLineEdit")   self.gridlayout.addWidget(self.replaceLineEdit, 1, 1, 1, 1)   self.findLineEdit = QtWidgets.QLineEdit(FindAndReplaceDlg)   self.findLineEdit.setObjectName("findLineEdit")   self.gridlayout.addWidget(self.findLineEdit, 0, 1, 1, 1)   self.label_2 = QtWidgets.QLabel(FindAndReplaceDlg)   self.label_2.setObjectName("label_2")   self.gridlayout.addWidget(self.label_2, 1, 0, 1, 1)   self.label = QtWidgets.QLabel(FindAndReplaceDlg)   self.label.setObjectName("label")   self.gridlayout.addWidget(self.label, 0, 0, 1, 1)   self.vboxlayout.addLayout(self.gridlayout)   self.vboxlayout1 = QtWidgets.QVBoxLayout()   self.vboxlayout1.setContentsMargins(0, 0, 0, 0)   self.vboxlayout1.setSpacing(6)   self.vboxlayout1.setObjectName("vboxlayout1")   self.caseCheckBox = QtWidgets.QCheckBox(FindAndReplaceDlg)   self.caseCheckBox.setObjectName("caseCheckBox")   self.vboxlayout1.addWidget(self.caseCheckBox)   self.wholeCheckBox = QtWidgets.QCheckBox(FindAndReplaceDlg)   self.wholeCheckBox.setChecked(True)   self.wholeCheckBox.setObjectName("wholeCheckBox")   self.vboxlayout1.addWidget(self.wholeCheckBox)   self.vboxlayout.addLayout(self.vboxlayout1)   spacerItem = QtWidgets.QSpacerItem(231, 16, QtWidgets.QSizePolicy.Minimum, QtWidgets.QSizePolicy.Expanding)   self.vboxlayout.addItem(spacerItem)   self.moreFrame = QtWidgets.QFrame(FindAndReplaceDlg)   self.moreFrame.setFrameShape(QtWidgets.QFrame.StyledPanel)   self.moreFrame.setFrameShadow(QtWidgets.QFrame.Raised)   self.moreFrame.setObjectName("moreFrame")   self.vboxlayout2 = QtWidgets.QVBoxLayout(self.moreFrame)   self.vboxlayout2.setContentsMargins(9, 9, 9, 9)   self.vboxlayout2.setSpacing(6)   self.vboxlayout2.setObjectName("vboxlayout2")   self.backwardsCheckBox = QtWidgets.QCheckBox(self.moreFrame)   self.backwardsCheckBox.setObjectName("backwardsCheckBox")   self.vboxlayout2.addWidget(self.backwardsCheckBox)   self.regexCheckBox = QtWidgets.QCheckBox(self.moreFrame)   self.regexCheckBox.setObjectName("regexCheckBox")   self.vboxlayout2.addWidget(self.regexCheckBox)   self.ignoreNotesCheckBox = QtWidgets.QCheckBox(self.moreFrame)   self.ignoreNotesCheckBox.setObjectName("ignoreNotesCheckBox")   self.vboxlayout2.addWidget(self.ignoreNotesCheckBox)   self.vboxlayout.addWidget(self.moreFrame)   self.mainlayout.addLayout(self.vboxlayout)   self.line = QtWidgets.QFrame(FindAndReplaceDlg)   self.line.setFrameShape(QtWidgets.QFrame.VLine)   self.line.setFrameShadow(QtWidgets.QFrame.Sunken)   self.line.setObjectName("line")   self.mainlayout.addWidget(self.line)   self.vboxlayout3 = QtWidgets.QVBoxLayout()   self.vboxlayout3.setContentsMargins(0, 0, 0, 0)   self.vboxlayout3.setSpacing(6)   self.vboxlayout3.setObjectName("vboxlayout3")   self.findButton = QtWidgets.QPushButton(FindAndReplaceDlg)   self.findButton.setFocusPolicy(QtCore.Qt.NoFocus)   self.findButton.setObjectName("findButton")   self.vboxlayout3.addWidget(self.findButton)   self.replaceButton = QtWidgets.QPushButton(FindAndReplaceDlg)   self.replaceButton.setFocusPolicy(QtCore.Qt.NoFocus)   self.replaceButton.setObjectName("replaceButton")   self.vboxlayout3.addWidget(self.replaceButton)   self.closeButton = QtWidgets.QPushButton(FindAndReplaceDlg)   self.closeButton.setFocusPolicy(QtCore.Qt.NoFocus)   self.closeButton.setObjectName("closeButton")   self.vboxlayout3.addWidget(self.closeButton)   self.moreButton = QtWidgets.QPushButton(FindAndReplaceDlg)   self.moreButton.setFocusPolicy(QtCore.Qt.NoFocus)   self.moreButton.setCheckable(True)   self.moreButton.setObjectName("moreButton")   self.vboxlayout3.addWidget(self.moreButton)   spacerItem1 = QtWidgets.QSpacerItem(21, 16, QtWidgets.QSizePolicy.Minimum, QtWidgets.QSizePolicy.Expanding)   self.vboxlayout3.addItem(spacerItem1)   self.mainlayout.addLayout(self.vboxlayout3)   self.label_2.setBuddy(self.replaceLineEdit)   self.label.setBuddy(self.findLineEdit)   self.retranslateUi(FindAndReplaceDlg)   self.closeButton.clicked.connect(FindAndReplaceDlg.reject)   self.moreButton.toggled['bool'].connect(self.moreFrame.setVisible)   QtCore.QMetaObject.connectSlotsByName(FindAndReplaceDlg)   FindAndReplaceDlg.setTabOrder(self.findLineEdit, self.replaceLineEdit)   FindAndReplaceDlg.setTabOrder(self.replaceLineEdit, self.caseCheckBox)   FindAndReplaceDlg.setTabOrder(self.caseCheckBox, self.wholeCheckBox)   FindAndReplaceDlg.setTabOrder(self.wholeCheckBox, self.backwardsCheckBox)   FindAndReplaceDlg.setTabOrder(self.backwardsCheckBox, self.regexCheckBox)   FindAndReplaceDlg.setTabOrder(self.regexCheckBox, self.ignoreNotesCheckBox)  def retranslateUi(self, FindAndReplaceDlg):   _translate = QtCore.QCoreApplication.translate   FindAndReplaceDlg.setWindowTitle(_translate("FindAndReplaceDlg", "Find and Replace"))   self.label_2.setText(_translate("FindAndReplaceDlg", "Replace w&ith:"))   self.label.setText(_translate("FindAndReplaceDlg", "Find &what:"))   self.caseCheckBox.setText(_translate("FindAndReplaceDlg", "&Case sensitive"))   self.wholeCheckBox.setText(_translate("FindAndReplaceDlg", "Wh&ole words"))   self.backwardsCheckBox.setText(_translate("FindAndReplaceDlg", "Search &Backwards"))   self.regexCheckBox.setText(_translate("FindAndReplaceDlg", "Regular E&xpression"))   self.ignoreNotesCheckBox.setText(_translate("FindAndReplaceDlg", "Ignore foot&notes and endnotes"))   self.findButton.setText(_translate("FindAndReplaceDlg", "&Find"))   self.replaceButton.setText(_translate("FindAndReplaceDlg", "&Replace"))   self.closeButton.setText(_translate("FindAndReplaceDlg", "Close"))   self.moreButton.setText(_translate("FindAndReplaceDlg", "&More"))

/home/yrd/eric_workspace/chap09/findandreplacedlg/findandreplacedlg.py

# -*- coding: utf-8 -*- """ Module implementing FindAndReplaceDlg. """ from PyQt5.QtCore import pyqtSlot,pyqtSignal from PyQt5.QtWidgets import QDialog,QApplication from Ui_findandreplacedlg import Ui_FindAndReplaceDlg class FindAndReplaceDlg(QDialog, Ui_FindAndReplaceDlg):  """  Class documentation goes here.  """  find = pyqtSignal(str,bool,bool,bool,bool,bool)  replace = pyqtSignal(str,str,bool,bool,bool,bool,bool)    def __init__(self, parent=None):   """   Constructor   @param parent reference to the parent widget   @type QWidget   """   super(FindAndReplaceDlg, self).__init__(parent)   self.setupUi(self)   self.moreFrame.hide()   #self.layout().setSizeConstraint(QLayout.SetFixedSize)   self.updateUi()    @pyqtSlot(str)  def on_findLineEdit_textEdited(self, text):   """   Slot documentation goes here.   @param p0 DESCRIPTION   @type str   """   # TODO: not implemented yet   self.updateUi()  @pyqtSlot()  def on_findButton_clicked(self):   self.find.emit(self.findLineEdit.text(),       self.caseCheckBox.isChecked(),       self.wholeCheckBox.isChecked(),       self.backwardsCheckBox.isChecked(),       self.regexCheckBox.isChecked(),       self.ignoreNotesCheckBox.isChecked())    @pyqtSlot()  def on_replaceButton_clicked(self):   self.replace.emit(self.findLineEdit.text(),        self.replaceLineEdit.text(),        self.caseCheckBox.isChecked(),        self.wholeCheckBox.isChecked(),        self.backwardsCheckBox.isChecked(),        self.regexCheckBox.isChecked(),        self.ignoreNotesCheckBox.isChecked())  def updateUi(self):   enable = self.findLineEdit.text()   self.findButton.setEnabled(bool(enable))   self.replaceButton.setEnabled(bool(enable)) if __name__ == "__main__":  import sys  def find(what, *args):   print("Find {0} {1}".format(what, [x for x in args]))  def replace(old, new, *args):   print("Replace {0} with {1} {2}".format(     old, new, [x for x in args]))  app = QApplication(sys.argv)  form = FindAndReplaceDlg()  form.find.connect(find)  form.replace.connect(replace)  form.show()  app.exec_()

运行结果：

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