pyqt5知识

QLineEdit综合案例

'''
QLineEdit综合案例
'''
from PyQt5.QtGui import QIcon
from PyQt5.QtWidgets import *
from PyQt5.QtGui import *
from PyQt5.QtCore import Qt
import sys
 
class QLineEditDemo(QWidget):
    def __init__(self):
        super(QLineEditDemo, self).__init__()
        self.initUI()
    def initUI(self):
        edit1 = QLineEdit()
        #使用int校验器
        edit1.setValidator(QIntValidator())
        edit1.setMaxLength(4) #不超过9999
        edit1.setAlignment(Qt.AlignCenter)
        edit1.setFont(QFont("Arial",20))
 
        #浮点数的校验器
        edit2 = QLineEdit()
        edit2.setValidator(QDoubleValidator(0.99,99.99,2))
 
        #掩码
        edit3 = QLineEdit()
        edit3.setInputMask('99_9999_999999;#')
 
        #绑定信号和槽（文本变化时，触发事件）
        edit4 = QLineEdit()
        edit4.textChanged.connect(self.textChanged)
 
        edit5 = QLineEdit()
        edit5.setEchoMode(QLineEdit.Password)
        edit5.editingFinished.connect(self.enterPress)
        #设置为只读
        edit6 = QLineEdit("Hello PyQt5")
        edit6.setReadOnly(True)
 
        formLayout = QFormLayout()
        formLayout.addRow("整数校验",edit1)
        formLayout.addRow("浮点数校验", edit2)
        formLayout.addRow("Input Mask", edit3)
        formLayout.addRow("文本变化", edit4)
        formLayout.addRow("密码", edit5)
        formLayout.addRow("只读", edit6)
        self.setLayout(formLayout)
        self.setWindowTitle("QLineEdit综合案例")
 
 
    def textChanged(self,text):
        print('输入的内容：'+ text)
    def enterPress(self):
        print("已输入值")
if __name__ == '__main__':
    app = QApplication(sys.argv)
    app.setWindowIcon(QIcon('./images/t10.ico'))
    main = QLineEditDemo()
    main.show()
    sys.exit(app.exec_())