综合实例-文本框类部件

 1 import sys
 2 from PyQt5.QtWidgets import QApplication, QLineEdit, QWidget, QFormLayout
 3 from PyQt5.QtGui import QIntValidator, QDoubleValidator, QFont
 4 from PyQt5.QtCore import Qt
 5 
 6 
 7 class lineEditDemo(QWidget):
 8 
 9     def __init__(self):
10         super(lineEditDemo, self).__init__()
11 
12         e1 = QLineEdit()
13         e1.setValidator(QIntValidator())
14         e1.setMaxLength(4)
15         e1.setAlignment(Qt.AlignRight)
16         e1.setFont(QFont("Arial", 20))
17         e2 = QLineEdit()
18         e2.setValidator(QDoubleValidator(0.99, 99.99, 2))
19         flo = QFormLayout()
20         flo.addRow("integer validator", e1)
21         flo.addRow("Double validateor", e2)
22         e3 = QLineEdit()
23         e3.setInputMask("+99_9999_999999")
24         flo.addRow("Input Mask", e3)
25         e4 = QLineEdit()
26         e4.textChanged.connect(self.textchanged)
27         flo.addRow("Text changed", e4)
28         e5 = QLineEdit()
29         e5.setEchoMode(QLineEdit.Password)
30         flo.addRow("Password", e5)
31         e6 = QLineEdit("Hello PyQt5")
32         e6.setReadOnly(True)
33         flo.addRow("Read Only", e6)
34         e5.editingFinished.connect(self.enterPress)
35         self.setLayout(flo)
36         self.setWindowTitle("QLineEdit例子")
37 
38     def textchanged(self, text):
39         print("输入的内容为: "+ text)
40 
41     def enterPress(self):
42         print("已输入值")
43 
44 if __name__ == '__main__':
45     app = QApplication(sys.argv)
46     win = lineEditDemo()
47     win.show()
48     sys.exit(app.exec_())
效果图：