QLineEdit常用方法及属性

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QLineEdit 实例1

import sys
from PyQt5.QtGui import *
from PyQt5.QtCore import *
from PyQt5.QtWidgets import *

class MyLineEditWindow(QWidget):
    def __init__(self, parent=None):
        super(MyLineEditWindow, self).__init__(parent)
        self.setWindowTitle("LineEdit Demo1")
        self.initUI()

    def initUI(self):
        flayout = QFormLayout()

        pNormalLineEdit = QLineEdit()
        pNoEchoLineEdit = QLineEdit()
        pPasswordLineEdit = QLineEdit()
        pPasswordEchoOnLineEdit = QLineEdit()

        pNormalLineEdit.setPlaceholderText("Normal")
        pNoEchoLineEdit.setPlaceholderText("NoEcho")
        pPasswordLineEdit.setPlaceholderText("Password")
        pPasswordEchoOnLineEdit.setPlaceholderText("PasswordEchoOn")

        pNormalLineEdit.setEchoMode(QLineEdit.Normal)
        pNoEchoLineEdit.setEchoMode(QLineEdit.NoEcho)
        pPasswordLineEdit.setEchoMode(QLineEdit.Password)
        pPasswordEchoOnLineEdit.setEchoMode(QLineEdit.PasswordEchoOnEdit)

        flayout.addRow("Normal", pNormalLineEdit)
        flayout.addRow("NoEcho", pNoEchoLineEdit)
        flayout.addRow("Password", pPasswordLineEdit)
        flayout.addRow("PasswordEchoOn", pPasswordEchoOnLineEdit)

        self.setLayout(flayout)


if __name__ == "__main__":
    app = QApplication(sys.argv)
    win = MyLineEditWindow()
    win.show()
    sys.exit(app.exec_())

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QLineEdit 实例2

import sys
from PyQt5.QtGui import *
from PyQt5.QtCore import *
from PyQt5.QtWidgets import *

class MyLineEditWindow(QWidget):
    def __init__(self, parent=None):
        super(MyLineEditWindow, self).__init__(parent)
        self.setWindowTitle("QLineEdit Demo2")
        self.initUI()

    def initUI(self):
        fromLayout = QFormLayout()

        pIntLineEdit = QLineEdit()
        pDoubleLineEdit = QLineEdit()
        pValidatorLineEdit = QLineEdit()

        fromLayout.addRow("整型", pIntLineEdit)
        fromLayout.addRow("浮点型", pDoubleLineEdit)
        fromLayout.addRow("字母和数字", pValidatorLineEdit)

        pIntLineEdit.setPlaceholderText("整型")
        pDoubleLineEdit.setPlaceholderText("浮点型")
        pValidatorLineEdit.setPlaceholderText("字母和数字")

        pIntValidator = QIntValidator(self)
        pIntValidator.setRange(1, 99)

        pDoubleValidator = QDoubleValidator(self)
        pDoubleValidator.setRange(-360, 360)
        pDoubleValidator.setNotation(QDoubleValidator.StandardNotation)
        pDoubleValidator.setDecimals(2)

        reg = QRegExp("[a-zA-Z0-9]+$")  # [a-zA-Z0-9]：只能输入一个字符，[a-zA-Z0-9]+$：可以输入字符串
        pValidator = QRegExpValidator(self)
        pValidator.setRegExp(reg)

        # 设置验证器
        pIntLineEdit.setValidator(pIntValidator)
        pDoubleLineEdit.setValidator(pDoubleValidator)
        pValidatorLineEdit.setValidator(pValidator)

        self.setLayout(fromLayout)

if __name__ == "__main__":
    app = QApplication(sys.argv)
    win = MyLineEditWindow()
    win.show()
    sys.exit(app.exec_())

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QLineEdit 实例3

import sys
from PyQt5.QtGui import *
from PyQt5.QtCore import *
from PyQt5.QtWidgets import *

class MyLineEditWindow(QWidget):
    def __init__(self, parent=None):
        super(MyLineEditWindow, self).__init__(parent)
        self.setWindowTitle("QLineEdit Demo3")
        self.initUI()

    def initUI(self):
        formLayout = QFormLayout()

        pIPLineEdit = QLineEdit()
        pMACLineEdit = QLineEdit()
        pDataLineEdit = QLineEdit()
        pLicenseLineEdit = QLineEdit()

        pIPLineEdit.setInputMask("000.000.000.000;_")
        pMACLineEdit.setInputMask("HH:HH:HH:HH:HH:HH;0")
        pDataLineEdit.setInputMask("0000-00-00")
        pLicenseLineEdit.setInputMask(">AAAAA-AAAAA-AAAAA-AAAAA-AAAAA;#") 

        formLayout.addRow("IP", pIPLineEdit)
        formLayout.addRow("MAC", pMACLineEdit)
        formLayout.addRow("Data", pDataLineEdit)
        formLayout.addRow("License", pLicenseLineEdit)

        self.setLayout(formLayout)

if __name__ == "__main__":
    app = QApplication(sys.argv)
    win = MyLineEditWindow()
    win.show()
    sys.exit(app.exec_())

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QLineEdit 综合示例

import sys
from PyQt5.QtGui import *
from PyQt5.QtCore import *
from PyQt5.QtWidgets import *


class MyLineEditWindow(QWidget):
    def __init__(self, parent=None):
        super(MyLineEditWindow, self).__init__(parent)
        e1 = QLineEdit()
        e1.setValidator(QIntValidator())
        e1.setMaxLength(4)
        e1.setAlignment(Qt.AlignRight)
        e1.setFont(QFont("Arial", 20))

        e2 = QLineEdit()
        e2.setValidator(QDoubleValidator(0.99, 99.99, 2))

        flo = QFormLayout()
        flo.addRow("integer validator", e1)
        flo.addRow("double validator", e2)

        e3 = QLineEdit()
        e3.setInputMask("+99_9999_99999")
        flo.addRow("input mask", e3)

        e4 = QLineEdit()
        e4.textChanged.connect(self.textchanged)
        # e4.textChanged.connect(self.textchanged(e4.text()))
        flo.addRow("text changed", e4)

        e5 = QLineEdit()
        e5.setEchoMode(QLineEdit.Password)
        e5.editingFinished.connect(self.enterPress)
        flo.addRow("password", e5) 

        e6 = QLineEdit("Hello world")
        e6.setReadOnly(True)
        flo.addRow("read only", e6)

        self.setLayout(flo)
        self.setWindowTitle("QLineEdit 综合示例")
        

    def textchanged(self, text):
        print("输入的内容为：" + text)

    def enterPress(self):
        print("已输入值")

    
if __name__ == "__main__":
    app = QApplication(sys.argv)
    win = MyLineEditWindow()
    win.show()
    sys.exit(app.exec_())