用python3+PyQt5改写Python Qt GUI快速编程的第七章实例Find Dialog

本文用用python3+PyQt5改写Python Qt GUI快速编程的第七章实例Find Dialog，通过Qt Designer设计界面。代码与设计分离，非常快捷。

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/home/yrd/eric_workspace/FR_Dialog/Ui_FR_Dialog.py

# -*- coding: utf-8 -*-from PyQt5 import QtCore, QtGui, QtWidgetsclass Ui_Dialog(object):    def setupUi(self, Dialog):        Dialog.setObjectName("Dialog")        Dialog.resize(417, 192)        Dialog.setSizeGripEnabled(True)        self.line = QtWidgets.QFrame(Dialog)        self.line.setGeometry(QtCore.QRect(300, 10, 20, 171))        self.line.setFrameShape(QtWidgets.QFrame.VLine)        self.line.setFrameShadow(QtWidgets.QFrame.Sunken)        self.line.setObjectName("line")        self.widget = QtWidgets.QWidget(Dialog)        self.widget.setGeometry(QtCore.QRect(10, 10, 281, 171))        self.widget.setObjectName("widget")        self.verticalLayout = QtWidgets.QVBoxLayout(self.widget)        self.verticalLayout.setContentsMargins(0, 0, 0, 0)        self.verticalLayout.setObjectName("verticalLayout")        self.formLayout = QtWidgets.QFormLayout()        self.formLayout.setObjectName("formLayout")        self.findLineLabel = QtWidgets.QLabel(self.widget)        self.findLineLabel.setObjectName("findLineLabel")        self.formLayout.setWidget(0, QtWidgets.QFormLayout.LabelRole, self.findLineLabel)        self.findLineEdit = QtWidgets.QLineEdit(self.widget)        self.findLineEdit.setObjectName("findLineEdit")        self.formLayout.setWidget(0, QtWidgets.QFormLayout.FieldRole, self.findLineEdit)        self.replaceLineLabel = QtWidgets.QLabel(self.widget)        self.replaceLineLabel.setObjectName("replaceLineLabel")        self.formLayout.setWidget(1, QtWidgets.QFormLayout.LabelRole, self.replaceLineLabel)        self.replaceLineEdit = QtWidgets.QLineEdit(self.widget)        self.replaceLineEdit.setObjectName("replaceLineEdit")        self.formLayout.setWidget(1, QtWidgets.QFormLayout.FieldRole, self.replaceLineEdit)        self.verticalLayout.addLayout(self.formLayout)        self.horizontalLayout_2 = QtWidgets.QHBoxLayout()        self.horizontalLayout_2.setObjectName("horizontalLayout_2")        self.caseCheckBox = QtWidgets.QCheckBox(self.widget)        self.caseCheckBox.setObjectName("caseCheckBox")        self.horizontalLayout_2.addWidget(self.caseCheckBox)        self.wholeCheckBox = QtWidgets.QCheckBox(self.widget)        self.wholeCheckBox.setEnabled(True)        self.wholeCheckBox.setChecked(True)        self.wholeCheckBox.setObjectName("wholeCheckBox")        self.horizontalLayout_2.addWidget(self.wholeCheckBox)        self.verticalLayout.addLayout(self.horizontalLayout_2)        self.horizontalLayout_3 = QtWidgets.QHBoxLayout()        self.horizontalLayout_3.setObjectName("horizontalLayout_3")        self.SyntaxLabel = QtWidgets.QLabel(self.widget)        self.SyntaxLabel.setObjectName("SyntaxLabel")        self.horizontalLayout_3.addWidget(self.SyntaxLabel)        self.syntaxComboBox = QtWidgets.QComboBox(self.widget)        self.syntaxComboBox.setObjectName("syntaxComboBox")        self.syntaxComboBox.addItem("")        self.syntaxComboBox.addItem("")        self.horizontalLayout_3.addWidget(self.syntaxComboBox)        self.verticalLayout.addLayout(self.horizontalLayout_3)        spacerItem = QtWidgets.QSpacerItem(20, 40, QtWidgets.QSizePolicy.Minimum, QtWidgets.QSizePolicy.Expanding)        self.verticalLayout.addItem(spacerItem)        self.widget1 = QtWidgets.QWidget(Dialog)        self.widget1.setGeometry(QtCore.QRect(330, 10, 71, 171))        self.widget1.setObjectName("widget1")        self.verticalLayout_2 = QtWidgets.QVBoxLayout(self.widget1)        self.verticalLayout_2.setContentsMargins(0, 0, 0, 0)        self.verticalLayout_2.setObjectName("verticalLayout_2")        self.findButton = QtWidgets.QPushButton(self.widget1)        self.findButton.setObjectName("findButton")        self.verticalLayout_2.addWidget(self.findButton)        self.replaceButton = QtWidgets.QPushButton(self.widget1)        self.replaceButton.setObjectName("replaceButton")        self.verticalLayout_2.addWidget(self.replaceButton)        self.replaceAllButton = QtWidgets.QPushButton(self.widget1)        self.replaceAllButton.setObjectName("replaceAllButton")        self.verticalLayout_2.addWidget(self.replaceAllButton)        spacerItem1 = QtWidgets.QSpacerItem(20, 40, QtWidgets.QSizePolicy.Minimum, QtWidgets.QSizePolicy.Expanding)        self.verticalLayout_2.addItem(spacerItem1)        self.closeButton = QtWidgets.QPushButton(self.widget1)        self.closeButton.setObjectName("closeButton")        self.verticalLayout_2.addWidget(self.closeButton)        self.findLineLabel.setBuddy(self.findLineEdit)        self.replaceLineLabel.setBuddy(self.replaceLineEdit)        self.SyntaxLabel.setBuddy(self.syntaxComboBox)        self.retranslateUi(Dialog)        self.closeButton.clicked.connect(Dialog.reject)        QtCore.QMetaObject.connectSlotsByName(Dialog)        Dialog.setTabOrder(self.findLineEdit, self.replaceLineEdit)        Dialog.setTabOrder(self.replaceLineEdit, self.caseCheckBox)        Dialog.setTabOrder(self.caseCheckBox, self.wholeCheckBox)        Dialog.setTabOrder(self.wholeCheckBox, self.syntaxComboBox)        Dialog.setTabOrder(self.syntaxComboBox, self.findButton)        Dialog.setTabOrder(self.findButton, self.replaceButton)        Dialog.setTabOrder(self.replaceButton, self.replaceAllButton)        Dialog.setTabOrder(self.replaceAllButton, self.closeButton)    def retranslateUi(self, Dialog):        _translate = QtCore.QCoreApplication.translate        Dialog.setWindowTitle(_translate("Dialog", "Dialog"))        self.findLineLabel.setText(_translate("Dialog", "Find &what:"))        self.replaceLineLabel.setText(_translate("Dialog", "Replace w&ith"))        self.caseCheckBox.setText(_translate("Dialog", "&Case sensitive"))        self.wholeCheckBox.setText(_translate("Dialog", "Wh&ole words"))        self.SyntaxLabel.setText(_translate("Dialog", "&Syntax:"))        self.syntaxComboBox.setItemText(0, _translate("Dialog", "Literal text"))        self.syntaxComboBox.setItemText(1, _translate("Dialog", "Regular expression"))        self.findButton.setText(_translate("Dialog", "&Find"))        self.replaceButton.setText(_translate("Dialog", "&Replace"))        self.replaceAllButton.setText(_translate("Dialog", "Replace &All"))        self.closeButton.setText(_translate("Dialog", "Close"))

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/home/yrd/eric_workspace/FR_Dialog/FR_Dialog.py

# -*- coding: utf-8 -*-"""Module implementing FR_Dialog."""from PyQt5.QtCore import pyqtSlot,pyqtSignal,Qtfrom PyQt5.QtWidgets import QDialog,QApplicationfrom Ui_FR_Dialog import Ui_Dialogimport reclass FR_Dialog(QDialog, Ui_Dialog):    """    Class documentation goes here.    """    nofound = pyqtSignal()    found = pyqtSignal(int)        def __init__(self,text,parent=None):        """        Constructor        @param parent reference to the parent widget        @type QWidget        """        super(FR_Dialog, self).__init__(parent)        self.__text = text        self.__index = 0                self.setupUi(self)        MAC = "qt_mac_set_native_menubar" in dir()        if not MAC:            self.findButton.setFocusPolicy(Qt.NoFocus)            self.replaceButton.setFocusPolicy(Qt.NoFocus)            self.replaceAllButton.setFocusPolicy(Qt.NoFocus)            self.closeButton.setFocusPolicy(Qt.NoFocus)          self.updateUi()    @pyqtSlot(str)    def on_findLineEdit_textEdited(self, text):        self.__index = 0        self.updateUi()    def makeRegex(self):        findText = self.findLineEdit.text()        if self.syntaxComboBox.currentText() == "Literal":            findText = re.escape(findText)        flags = re.MULTILINE|re.DOTALL|re.UNICODE        if not self.caseCheckBox.isChecked():            flags |= re.IGNORECASE        if self.wholeCheckBox.isChecked():            findText = r"\b%s\b" % findText        return re.compile(findText, flags)    @pyqtSlot()    def on_findButton_clicked(self):        regex = self.makeRegex()        match = regex.search(self.__text, self.__index)        if match is not None:            self.__index = match.end()            #self.emit(SIGNAL("found"), match.start())            self.found.emit(match.start())        else:            #self.emit(SIGNAL("notfound"))            self.nofound.emit()    @pyqtSlot()    def on_replaceButton_clicked(self):        regex = self.makeRegex()        self.__text = regex.sub(self.replaceLineEdit.text(),                                self.__text, 1)    @pyqtSlot()    def on_replaceAllButton_clicked(self):        regex = self.makeRegex()        self.__text = regex.sub(self.replaceLineEdit.text(),                                self.__text)        def updateUi(self):        enable = bool(self.findLineEdit.text())        self.findButton.setEnabled(enable)        self.replaceButton.setEnabled(enable)        self.replaceAllButton.setEnabled(enable)    def text(self):        return self.__text   if __name__ == "__main__":    import sys    text = """US experience shows that, unlike traditional patents,software patents do not encourage innovation and R&D, quite thecontrary. In particular they hurt small and medium-sized enterprisesand generally newcomers in the market. They will just weaken the marketand increase spending on patents and litigation, at the expense oftechnological innovation and research. Especially dangerous areattempts to abuse the patent system by preventing interoperability as ameans of avoiding competition with technological ability.--- Extract quoted from Linus Torvalds and Alan Cox's letterto the President of the European Parliamenthttp://www.effi.org/patentit/patents_torvalds_cox.html"""    app = QApplication(sys.argv)    form = FR_Dialog(text)    #form.connect(form, SIGNAL("found"), found)    #form.connect(form, SIGNAL("notfound"), nomore)    def found(where):        print("Found at %d" % where)    def nomore():        print("No more found")           form.found.connect(found)    form.nofound.connect(nomore)         form.show()    sys.exit(app.exec_())    #print form.text()

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运行结果：