| liqi98136 |
2017-04-01 16:04 |
Qt 高级编程 1.1 扩展现有控件
HexSpinBox from SpinBox
16进制
字符从0-9 ，A-F， a-f
范围从0-255
通过查找QT助手，找到SpinBox
实现，主要完成三个虚函数
virtual QValidator::State validate(QString &text, int &pos) const
virtual QString textFromValue(int value) const
virtual int valueFromText(const QString &text) const
对应三个函数
def validate(self,text,pos): #输入验证
def textFromValue(self, value): #数字变字符 python 使用hex(value)
def valueFromText(self,text): #字符串变成数字 int( text,16)
具体实现如下：
- # -*- coding:utf-8 -*-
from PyQt5.QtWidgets import QSpinBox, QApplication
from PyQt5.QtCore import pyqtSlot, QRegExp
from PyQt5.QtGui import QRegExpValidator
class HexSpinBox(QSpinBox):
"""docstring for HexSpinBox"""
def __init__(self, parent=None):
super(HexSpinBox, self).__init__(parent)
self.setRange(0, 255)
self._validator = QRegExpValidator(QRegExp("[0-9A-Fa-f]+"), self)
def validate(self,text,pos):
return self._validator.validate(text,pos)
def textFromValue(self, value):
if value in range(0,16):
return "0"+hex(value)[2:].upper()
else:
return hex(value)[2:].upper()
def valueFromText(self,text):
num = int(text, 16)
return num
@pyqtSlot(str)
def setText(self,text):
self.setValue(self.valueFromText(text))
if __name__ == '__main__':
import sys
app = QApplication(sys.argv)
ex = HexSpinBox()
ex.sizeHint()
ex.setText('0A')
ex.show()
sys.exit(app.exec_())
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