PyQt5+python3的FindDialog
1 import sys 2 from PyQt5.QtWidgets import * 3 from PyQt5.QtCore import Qt, pyqtSignal 4 5 class FindDialog(QDialog): 6 findNext = pyqtSignal(str, Qt.CaseSensitivity) 7 findPrevious = pyqtSignal(str, Qt.CaseSensitivity) 8 9 def __init__(self, parent = None): 10 super().__init__(parent) 11 self.label = QLabel(self.tr("Find &what:")) 12 self.lineEdit = QLineEdit() 13 self.label.setBuddy(self.lineEdit) 14 15 self.caseCheckBox = QCheckBox(self.tr("Match &case")) 16 self.backwardCheckBox = QCheckBox(self.tr("Search &backward")) 17 18 self.findButton = QPushButton(self.tr("&Find")) 19 self.findButton.setDefault(True) 20 self.findButton.setEnabled(False) 21 22 self.closeButton = QPushButton(self.tr("Close")) 23 self.lineEdit.textChanged.connect(self.enableFindButton) 24 self.findButton.clicked.connect(self.findClicked) 25 self.closeButton.clicked.connect(self.close) 26 27 self.topLeftLayout = QHBoxLayout() 28 self.topLeftLayout.addWidget(self.label) 29 self.topLeftLayout.addWidget(self.lineEdit) 30 31 self.leftLayout = QVBoxLayout() 32 self.leftLayout.addLayout(self.topLeftLayout) 33 self.leftLayout.addWidget(self.caseCheckBox) 34 self.leftLayout.addWidget(self.backwardCheckBox) 35 36 self.rightLayout = QVBoxLayout() 37 self.rightLayout.addWidget(self.findButton) 38 self.rightLayout.addWidget(self.closeButton) 39 self.rightLayout.addStretch() 40 41 self.mainLayout = QHBoxLayout() 42 self.mainLayout.addLayout(self.leftLayout) 43 self.mainLayout.addLayout(self.rightLayout) 44 self.setLayout(self.mainLayout) 45 self.setWindowTitle(self.tr("Find")) 46 self.setFixedHeight(self.sizeHint().height()) 47 48 def findClicked(self): 49 text = self.lineEdit.text() 50 cs = (Qt.CaseSensitive if self.caseCheckBox.isChecked() 51 else Qt.CaseInsensitive) 52 53 if self.backwardCheckBox.isChecked(): 54 self.findPrevious.emit(text, cs) 55 else: 56 self.findNext.emit(text, cs) 57 58 def enableFindButton(self, text): 59 self.findButton.setEnabled(not text == '') 60 61 if __name__ == '__main__': 62 app = QApplication(sys.argv) 63 dialog = FindDialog() 64 dialog.show() 65 sys.exit(app.exec())