用PyQt实现封装QT的IP地址控件
由于QT没有提供现成的IP地址控件，而仅仅使用正则表达式和inputMask为QLineEdit进行IP地址输入限制和验证，效果不怎么理想。由于项目需要，所以用PyQt4封装了一个IPv4地址控件。
参考地址：http://www.cppblog.com/cctoqh/archive/2011/06/03/148018.html，该文章是用C++实现的。
源代码如下：
from PyQt4.QtGui import *
from PyQt4.QtCore import *
class IpPartEdit(QLineEdit):
def __init__(self, parent = None):
QLineEdit.__init__(self, parent)
self.nextTab = None
self.setMaxLength(3)
self.setFrame(False)
self.setAlignment(Qt.AlignCenter)
validator = QIntValidator(0, 255, self)
self.setValidator(validator)
self.connect(self, SIGNAL('textEdited(QString)'),\
self, SLOT('text_edited(QString)'))
def set_nextTabEdit(self, nextTab):
self.nextTab = nextTab
def focusInEvent(self, event):
self.selectAll()
super(IpPartEdit, self).focusInEvent(event)
def keyPressEvent(self, event):
if (event.key() == Qt.Key_Period):
if self.nextTab:
self.nextTab.setFocus()
self.nextTab.selectAll()
super(IpPartEdit, self).keyPressEvent(event)
@pyqtSlot('QString')
def text_edited(self, text):
validator = QIntValidator(0, 255, self)
ipaddr = text
pos = 0
state = validator.validate(ipaddr, pos)[0]
if state == QValidator.Acceptable:
if ipaddr.size() > 1:
if ipaddr.size() == 2:
ipnum = ipaddr.toInt()[0]
if ipnum > 25:
if self.nextTab:
self.nextTab.setFocus()
self.nextTab.selectAll()
else:
if self.nextTab:
self.nextTab.setFocus()
self.nextTab.selectAll()
class Ip4Edit(QLineEdit):
def __init__(self, parent = None):
QLineEdit.__init__(self, parent)
self.ip_part1 = IpPartEdit()
self.ip_part2 = IpPartEdit()
self.ip_part3 = IpPartEdit()
self.ip_part4 = IpPartEdit()
self.ip_part1.setAlignment(Qt.AlignCenter)
self.ip_part2.setAlignment(Qt.AlignCenter)
self.ip_part3.setAlignment(Qt.AlignCenter)
self.ip_part4.setAlignment(Qt.AlignCenter)
self.labeldot1 = QLabel('.')
self.labeldot2 = QLabel('.')
self.labeldot3 = QLabel('.')
self.labeldot1.setAlignment(Qt.AlignCenter)
self.labeldot2.setAlignment(Qt.AlignCenter)
self.labeldot3.setAlignment(Qt.AlignCenter)
layout = QHBoxLayout()
layout.addWidget(self.ip_part1)
layout.addWidget(self.labeldot1)
layout.addWidget(self.ip_part2)
layout.addWidget(self.labeldot2)
layout.addWidget(self.ip_part3)
layout.addWidget(self.labeldot3)
layout.addWidget(self.ip_part4)
layout.setSpacing(0)
layout.setContentsMargins(QMargins(2, 2, 2, 2))
self.setLayout(layout)
QWidget.setTabOrder(self.ip_part1, self.ip_part2)
QWidget.setTabOrder(self.ip_part2, self.ip_part3)
QWidget.setTabOrder(self.ip_part3, self.ip_part4)
self.ip_part1.set_nextTabEdit(self.ip_part2)
self.ip_part2.set_nextTabEdit(self.ip_part3)
self.ip_part3.set_nextTabEdit(self.ip_part4)
self.connect(self.ip_part1, SIGNAL('textChanged(QString)'),\
self, SLOT('textChangedSlot(QString)'))
self.connect(self.ip_part2, SIGNAL('textChanged(QString)'),\
self, SLOT('textChangedSlot(QString)'))
self.connect(self.ip_part3, SIGNAL('textChanged(QString)'),\
self, SLOT('textChangedSlot(QString)'))
self.connect(self.ip_part4, SIGNAL('textChanged(QString)'),\
self, SLOT('textChangedSlot(QString)'))
self.connect(self.ip_part1, SIGNAL('textEdited(QString)'),\
self, SLOT('textEditedSlot(QString)'))
self.connect(self.ip_part2, SIGNAL('textEdited(QString)'),\
self, SLOT('textEditedSlot(QString)'))
self.connect(self.ip_part3, SIGNAL('textEdited(QString)'),\
self, SLOT('textEditedSlot(QString)'))
self.connect(self.ip_part4, SIGNAL('textEdited(QString)'),\
self, SLOT('textEditedSlot(QString)'))
@pyqtSlot('QString')
def textChangedSlot(self, text):
ippart1 = self.ip_part1.text()
ippart2 = self.ip_part2.text()
ippart3 = self.ip_part3.text()
ippart4 = self.ip_part4.text()
ipaddr = QString('%1.%2.%3.%4')\
.arg(ippart1)\
.arg(ippart2)\
.arg(ippart3)\
.arg(ippart4)
self.emit(SIGNAL('textChanged'), ipaddr)
@pyqtSlot('QString')
def textEditedSlot(self, text):
ippart1 = self.ip_part1.text()
ippart2 = self.ip_part2.text()
ippart3 = self.ip_part3.text()
ippart4 = self.ip_part4.text()
ipaddr = QString('%1.%2.%3.%4')\
.arg(ippart1)\
.arg(ippart2)\
.arg(ippart3)\
.arg(ippart4)
self.emit(SIGNAL('textEdited'), ipaddr)
def setText(self, text):
regexp = QRegExp('^((2[0-4]\d|25[0-5]|[01]?\d\d?).){3}(2[0-4]\d||25[0-5]|[01]?\d\d?)$')
validator = QRegExpValidator(regexp ,self)
nPos = 0
state = validator.validate(text, nPos)[0]
ippart1 = QString()
ippart2 = QString()
ippart3 = QString()
ippart4 = QString()
if state == QValidator.Acceptable: # valid
ippartlist = text.split('.')
strcount = len(ippartlist)
index = 0
if index < strcount:
ippart1 = ippartlist[index]
index += 1
if index < strcount:
ippart2 = ippartlist[index]
index += 1
if index < strcount:
ippart3 = ippartlist[index]
index += 1
if index < strcount:
ippart4 = ippartlist[index]
self.ip_part1.setText(ippart1)
self.ip_part2.setText(ippart2)
self.ip_part3.setText(ippart3)
self.ip_part4.setText(ippart4)
def text(self):
ippart1 = self.ip_part1.text()
ippart2 = self.ip_part2.text()
ippart3 = self.ip_part3.text()
ippart4 = self.ip_part4.text()
return QString('%1.%2.%3.%4')\
.arg(ippart1)\
.arg(ippart2)\
.arg(ippart3)\
.arg(ippart4)
def setStyleSheet(self, styleSheet):
self.ip_part1.setStyleSheet(styleSheet)
self.ip_part2.setStyleSheet(styleSheet)
self.ip_part3.setStyleSheet(styleSheet)
self.ip_part4.setStyleSheet(styleSheet)