python3+PyQt5+Qt Designer实现扩展对话框

本文是对《Python Qt GUI快速编程》的第9章的扩展对话框例子Find and replace用Python3+PyQt5+Qt Designer进行改写。

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：

来源：https://blog.csdn.net/xiaoyangyang20/article/details/54580749