#!/usr/bin/env python ############################################################################# ## ## Copyright (C) 2013 Riverbank Computing Limited. ## Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies). ## All rights reserved. ## ## This file is part of the examples of PyQt. ## ## $QT_BEGIN_LICENSE:BSD$ ## You may use this file under the terms of the BSD license as follows: ## ## "Redistribution and use in source and binary forms, with or without ## modification, are permitted provided that the following conditions are ## met: ## * Redistributions of source code must retain the above copyright ## notice, this list of conditions and the following disclaimer. ## * Redistributions in binary form must reproduce the above copyright ## notice, this list of conditions and the following disclaimer in ## the documentation and/or other materials provided with the ## distribution. ## * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor ## the names of its contributors may be used to endorse or promote ## products derived from this software without specific prior written ## permission. ## ## THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ## "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT ## LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR ## A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT ## OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, ## SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT ## LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, ## DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY ## THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT ## (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE ## OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE." ## $QT_END_LICENSE$ ## ############################################################################# from PyQt5.QtCore import QRegExp, Qt from PyQt5.QtGui import QPalette from PyQt5.QtWidgets import (QApplication, QCheckBox, QComboBox, QDialog, QGridLayout, QHBoxLayout, QLabel, QLineEdit, QSizePolicy) class RegExpDialog(QDialog): MaxCaptures = 6 def __init__(self, parent=None): super(RegExpDialog, self).__init__(parent) self.patternComboBox = QComboBox() self.patternComboBox.setEditable(True) self.patternComboBox.setSizePolicy(QSizePolicy.Expanding, QSizePolicy.Preferred) patternLabel = QLabel("&Pattern:") patternLabel.setBuddy(self.patternComboBox) self.escapedPatternLineEdit = QLineEdit() self.escapedPatternLineEdit.setReadOnly(True) palette = self.escapedPatternLineEdit.palette() palette.setBrush(QPalette.Base, palette.brush(QPalette.Disabled, QPalette.Base)) self.escapedPatternLineEdit.setPalette(palette) escapedPatternLabel = QLabel("&Escaped Pattern:") escapedPatternLabel.setBuddy(self.escapedPatternLineEdit) self.syntaxComboBox = QComboBox() self.syntaxComboBox.addItem("Regular expression v1", QRegExp.RegExp) self.syntaxComboBox.addItem("Regular expression v2", QRegExp.RegExp2) self.syntaxComboBox.addItem("Wildcard", QRegExp.Wildcard) self.syntaxComboBox.addItem("Fixed string", QRegExp.FixedString) syntaxLabel = QLabel("&Pattern Syntax:") syntaxLabel.setBuddy(self.syntaxComboBox) self.textComboBox = QComboBox() self.textComboBox.setEditable(True) self.textComboBox.setSizePolicy(QSizePolicy.Expanding, QSizePolicy.Preferred) textLabel = QLabel("&Text:") textLabel.setBuddy(self.textComboBox) self.caseSensitiveCheckBox = QCheckBox("Case &Sensitive") self.caseSensitiveCheckBox.setChecked(True) self.minimalCheckBox = QCheckBox("&Minimal") indexLabel = QLabel("Index of Match:") self.indexEdit = QLineEdit() self.indexEdit.setReadOnly(True) matchedLengthLabel = QLabel("Matched Length:") self.matchedLengthEdit = QLineEdit() self.matchedLengthEdit.setReadOnly(True) self.captureLabels = [] self.captureEdits = [] for i in range(self.MaxCaptures): self.captureLabels.append(QLabel("Capture %d:" % i)) self.captureEdits.append(QLineEdit()) self.captureEdits[i].setReadOnly(True) self.captureLabels[0].setText("Match:") checkBoxLayout = QHBoxLayout() checkBoxLayout.addWidget(self.caseSensitiveCheckBox) checkBoxLayout.addWidget(self.minimalCheckBox) checkBoxLayout.addStretch(1) mainLayout = QGridLayout() mainLayout.addWidget(patternLabel, 0, 0) mainLayout.addWidget(self.patternComboBox, 0, 1) mainLayout.addWidget(escapedPatternLabel, 1, 0) mainLayout.addWidget(self.escapedPatternLineEdit, 1, 1) mainLayout.addWidget(syntaxLabel, 2, 0) mainLayout.addWidget(self.syntaxComboBox, 2, 1) mainLayout.addLayout(checkBoxLayout, 3, 0, 1, 2) mainLayout.addWidget(textLabel, 4, 0) mainLayout.addWidget(self.textComboBox, 4, 1) mainLayout.addWidget(indexLabel, 5, 0) mainLayout.addWidget(self.indexEdit, 5, 1) mainLayout.addWidget(matchedLengthLabel, 6, 0) mainLayout.addWidget(self.matchedLengthEdit, 6, 1) for i in range(self.MaxCaptures): mainLayout.addWidget(self.captureLabels[i], 7 + i, 0) mainLayout.addWidget(self.captureEdits[i], 7 + i, 1) self.setLayout(mainLayout) self.patternComboBox.editTextChanged.connect(self.refresh) self.textComboBox.editTextChanged.connect(self.refresh) self.caseSensitiveCheckBox.toggled.connect(self.refresh) self.minimalCheckBox.toggled.connect(self.refresh) self.syntaxComboBox.currentIndexChanged.connect(self.refresh) self.patternComboBox.addItem("[A-Za-z_]+([A-Za-z_0-9]*)") self.textComboBox.addItem("(10 + delta4)* 32") self.setWindowTitle("RegExp") self.setFixedHeight(self.sizeHint().height()) self.refresh() def refresh(self): self.setUpdatesEnabled(False) pattern = self.patternComboBox.currentText() text = self.textComboBox.currentText() escaped = str(pattern) escaped.replace('\\', '\\\\') escaped.replace('"', '\\"') self.escapedPatternLineEdit.setText('"' + escaped + '"') rx = QRegExp(pattern) cs = Qt.CaseSensitive if self.caseSensitiveCheckBox.isChecked() else Qt.CaseInsensitive rx.setCaseSensitivity(cs) rx.setMinimal(self.minimalCheckBox.isChecked()) syntax = self.syntaxComboBox.itemData(self.syntaxComboBox.currentIndex()) rx.setPatternSyntax(syntax) palette = self.patternComboBox.palette() if rx.isValid(): palette.setColor(QPalette.Text, self.textComboBox.palette().color(QPalette.Text)) else: palette.setColor(QPalette.Text, Qt.red) self.patternComboBox.setPalette(palette) self.indexEdit.setText(str(rx.indexIn(text))) self.matchedLengthEdit.setText(str(rx.matchedLength())) for i in range(self.MaxCaptures): self.captureLabels[i].setEnabled(i <= rx.captureCount()) self.captureEdits[i].setEnabled(i <= rx.captureCount()) self.captureEdits[i].setText(rx.cap(i)) self.setUpdatesEnabled(True) if __name__ == '__main__': import sys app = QApplication(sys.argv) dialog = RegExpDialog() dialog.show() sys.exit(app.exec_())