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())

 

转载于:https://www.cnblogs.com/eaxebx/p/4009808.html