python3+PyQt5+Qt Designer实现扩展对话框

Python  /  管理员 发布于 7年前   154

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 sysfrom PyQt5.QtCore import Qt,pyqtSignalfrom 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, QtWidgetsclass 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,pyqtSignalfrom PyQt5.QtWidgets import QDialog,QApplicationfrom Ui_findandreplacedlg import Ui_FindAndReplaceDlgclass 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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