Python/pyqt5/CODE/元件使用範例/qt04_lineEdit02.py

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# -*- coding: utf-8 -*-
'''
簡介
PyQt5中 QLineEdit的驗證器範例
'''
from PyQt5.QtWidgets import QApplication, QLineEdit , QWidget , QFormLayout
from PyQt5.QtGui import QIntValidator ,QDoubleValidator , QRegExpValidator
from PyQt5.QtCore import QRegExp
import sys
class lineEditDemo(QWidget):
def __init__(self, parent=None):
super(lineEditDemo, self).__init__(parent)
self.setWindowTitle("QLineEdit範例")
flo = QFormLayout()
pIntLineEdit = QLineEdit( )
pDoubleLineEdit = QLineEdit()
pValidatorLineEdit = QLineEdit( )
flo.addRow("整數", pIntLineEdit)
flo.addRow("浮點數", pDoubleLineEdit)
flo.addRow("字母和數字", pValidatorLineEdit)
pIntLineEdit.setPlaceholderText("整數");
pDoubleLineEdit.setPlaceholderText("浮點數");
pValidatorLineEdit.setPlaceholderText("字母和數字");
# 整數,範圍:[1, 99]
pIntValidator = QIntValidator(self)
pIntValidator.setRange(1, 99)
# 浮點數,範圍:[-360, 360],精度:小數點後兩位
pDoubleValidator = QDoubleValidator(self)
pDoubleValidator.setRange(-360, 360)
pDoubleValidator.setNotation(QDoubleValidator.StandardNotation)
pDoubleValidator.setDecimals(2)
# 字母和數字
reg = QRegExp("[a-zA-Z0-9]+$")
pValidator = QRegExpValidator(self)
pValidator.setRegExp(reg)
# 設定驗證器
pIntLineEdit.setValidator(pIntValidator)
pDoubleLineEdit.setValidator(pDoubleValidator)
pValidatorLineEdit.setValidator(pValidator)
self.setLayout(flo)
if __name__ == "__main__":
app = QApplication(sys.argv)
win = lineEditDemo()
win.show()
sys.exit(app.exec_())