Question

我正在尝试使用PyQt4创建GUI，我最初使用QT设计器来完成我的整体布局，然后修改代码。我注意到的是，有很多重复的代码会被一个类或方法所取代，但我不确定哪个更好或者如何正确地实现这两种方式。这里是重复代码（它是一个非常大的程序）的一个例子

self.ch2_R = QtGui.QLineEdit(Form)
self.ch2_R.setSizePolicy(sizePolicy)
self.ch2_R.setText(_fromUtf8(""))
self.ch2_R.setFrame(True)
self.ch2_R.setAlignment(QtCore.Qt.AlignCenter)
self.ch2_R.setReadOnly(True)
self.ch2_R.setObjectName(_fromUtf8("ch2_R"))
print self.ch2_R

self.ch3_R = QtGui.QLineEdit(Form)
self.ch3_R.setSizePolicy(sizePolicy)
self.ch3_R.setText(_fromUtf8(""))
self.ch3_R.setFrame(True)
self.ch3_R.setAlignment(QtCore.Qt.AlignCenter)
self.ch3_R.setReadOnly(True)
self.ch3_R.setObjectName(_fromUtf8("ch3_R"))

self.ch4_R = QtGui.QLineEdit(Form)
self.ch4_R.setSizePolicy(sizePolicy)
self.ch4_R.setText(_fromUtf8(""))
self.ch4_R.setFrame(True)
self.ch4_R.setAlignment(QtCore.Qt.AlignCenter)
self.ch4_R.setReadOnly(True)
self.ch4_R.setObjectName(_fromUtf8("ch4_R"))

sizePolicy = QtGui.QSizePolicy(QtGui.QSizePolicy.Preferred, QtGui.QSizePolicy.Fixed)
sizePolicy.setHorizontalStretch(0)
sizePolicy.setVerticalStretch(0)
sizePolicy.setHeightForWidth(self.ch2_R.sizePolicy().hasHeightForWidth())

sizePolicy = QtGui.QSizePolicy(QtGui.QSizePolicy.Preferred, QtGui.QSizePolicy.Fixed)
sizePolicy.setHorizontalStretch(0)
sizePolicy.setVerticalStretch(0)
sizePolicy.setHeightForWidth(self.ch3_R.sizePolicy().hasHeightForWidth())

sizePolicy = QtGui.QSizePolicy(QtGui.QSizePolicy.Preferred, QtGui.QSizePolicy.Fixed)
sizePolicy.setHorizontalStretch(0)
sizePolicy.setVerticalStretch(0)
sizePolicy.setHeightForWidth(self.ch4_R.sizePolicy().hasHeightForWidth())

self.gridLayout.addWidget(self.ch2_R, 4, 5, 1, 4)
self.gridLayout.addWidget(self.ch3_R, 5, 5, 1, 4)
self.gridLayout.addWidget(self.ch4_R, 6, 5, 1, 4)

此代码全部在

之内

from PyQt4 import QtCore, QtGui

try:
    _fromUtf8 = QtCore.QString.fromUtf8
except AttributeError:
    def _fromUtf8(s):
        return s

try:
    _encoding = QtGui.QApplication.UnicodeUTF8
    def _translate(context, text, disambig):
        return QtGui.QApplication.translate(context, text, disambig, _encoding)
except AttributeError:
    def _translate(context, text, disambig):
        return QtGui.QApplication.translate(context, text, disambig)

class Ui_Form(object):
        def setupUi(self, Form):

我的尝试是在Ui_Form类中创建一个像这样的方法

def myQtlineEdit(self, name, form, sizePolicy):
        self.name = QtGui.QLineEdit(Form)
        self.name.setSizePolicy(sizePolicy)
        self.name.setText(_fromUtf8(""))
        self.name.setFrame(True)
        self.name.setAlignment(QtCore.Qt.AlignCenter)
        self.name.setReadOnly(True)
        self.name.setObjectName(_fromUtf8("%s" %name))

        sizePolicy = QtGui.QSizePolicy(QtGui.QSizePolicy.Preferred, QtGui.QSizePolicy.Fixed)
        sizePolicy.setHorizontalStretch(0)
        sizePolicy.setVerticalStretch(0)
        sizePolicy.setHeightForWidth(self.name.sizePolicy().hasHeightForWidth())

self myQtlineEdit("ch2_R", form, sizePolicy)

它确实创建了我正在寻找的文本字段，但是

self.gridLayout.addWidget(self.ch2_R, 4, 5, 1, 4)

会给我一个错误，说ch2_R没有exsist

感谢。

Answer 1

您不应创建名为ch2_R的属性，而是始终指定属性self.name，而应该执行此操作

def myQtlineEdit(self, name, form, sizePolicy):
    widget = QtGui.QLineEdit(Form)
    widget.setSizePolicy(sizePolicy)
    widget.setText(_fromUtf8(""))
    widget.setFrame(True)
    widget.setAlignment(QtCore.Qt.AlignCenter)
    widget.setReadOnly(True)
    widget.setObjectName(_fromUtf8("%s" %name))

    setattr(self, name, widget)

    sizePolicy = QtGui.QSizePolicy(QtGui.QSizePolicy.Preferred, QtGui.QSizePolicy.Fixed)
    sizePolicy.setHorizontalStretch(0)
    sizePolicy.setVerticalStretch(0)
    sizePolicy.setHeightForWidth(widget.sizePolicy().hasHeightForWidth())

消除python中的重复代码

1 个答案: