Pyqt4 在按下按钮时更改拆分器布局

Question

我使用两个拆分器将窗口拆分为三个部分，顶部拆分器上有三个按钮，我希望每次按下按钮时底部拆分器中的布局都会改变，例如当按下添加用户时底部拆分器的布局应该显示一个表单，当按下删除时它应该显示一个列表等等。

from PyQt4 import QtGui, QtCore

class Window(QtGui.QWidget):

    def __init__(self):
        super().__init__()
        self.initUI()

    def initUI(self):      

        vbox = QtGui.QVBoxLayout(self)

        topleft = QtGui.QFrame(self)
        topleft.setFrameShape(QtGui.QFrame.StyledPanel)

        bottomleft = QtGui.QFrame(self)
        bottomleft.setFrameShape(QtGui.QFrame.StyledPanel)

        right = QtGui.QFrame(self)
        right.setFrameShape(QtGui.QFrame.StyledPanel)

        splitterV = QtGui.QSplitter(QtCore.Qt.Vertical)
        splitterV.addWidget(topleft)
        splitterV.addWidget(bottomleft)

        splitterH = QtGui.QSplitter(QtCore.Qt.Horizontal)
        splitterH.addWidget(splitterV)
        splitterH.addWidget(right)

        vbox.addWidget(splitterH)
        self.setLayout(vbox)
        splitterV.setSizes([100,620])
        splitterH.setSizes([960,360])

        ##Layout for the top left of the splitter        
        addUserButton = QtGui.QPushButton('Add New User')
        addUserButton.clicked.connect(self.addNewUser)
        deleteUserButton = QtGui.QPushButton('Delete User')
        deleteUserButton.clicked.connect(self.deleteUser)
        editUserButton = QtGui.QPushButton('Edit User')
        editUserButton.clicked.connect(self.editUser)
        topLayout = QtGui.QHBoxLayout()
        topLayout.addWidget(addUserButton)
        topLayout.addWidget(deleteUserButton)
        topLayout.addWidget(editUserButton)
        topleft.setLayout(topLayout)

        QtGui.QApplication.setStyle(QtGui.QStyleFactory.create('Plastique'))      

    def addNewUser(self):
        ##Layout for the bottom left of the splitter when button pressed
        lbl1 = QtGui.QLabel('First Name')
        lbl2 = QtGui.QLabel('Last Name')

        fname = QtGui.QLineEdit()
        lname = QtGui.QLineEdit()


        grid = QtGui.QGridLayout()
        grid.setSpacing(10)

        grid.addWidget(lbl1, 1, 0)
        grid.addWidget(fname, 1, 1)
        grid.addWidget(lbl2, 2, 0)
        grid.addWidget(lname, 2, 1)

        self.bottomleft.setLayout(grid)

    def deleteUser(self):
        print('Delete')
    def editUser(self):
        print('Edit')

if __name__ == '__main__':
    import sys
    app = QtGui.QApplication(sys.argv)
    window = Window()
    window.show()
    sys.exit(app.exec_())

我尝试了许多不同的方法，但仍然无法实现任何想法？按下添加用户按钮时，我现在遇到此错误：

Traceback (most recent call last):
  File "C:\Users\Program\Test\SettingsTab.py", line 81, in addNewUser
    self.bottomleft.setLayout(grid)
AttributeError: 'Window' object has no attribute 'bottomleft'

我不确定如何访问窗口的左下角布局并在每次按键时更改它，因为如果它不是属性，我无法使用 self 访问它？那是什么？

Answer 1

实际上是 initUI 方法导致了这里的问题 - 你没有将变量定义为类变量，它们是特定于方法的，所以 addNewUser 方法看不到它们。

topleft = QtGui.QFrame(self)
topleft.setFrameShape(QtGui.QFrame.StyledPanel)

bottomleft = QtGui.QFrame(self)
bottomleft.setFrameShape(QtGui.QFrame.StyledPanel)

right = QtGui.QFrame(self)
right.setFrameShape(QtGui.QFrame.StyledPanel)

应改为：

self.topleft = QtGui.QFrame(self)
self.topleft.setFrameShape(QtGui.QFrame.StyledPanel)

self.bottomleft = QtGui.QFrame(self)
self.bottomleft.setFrameShape(QtGui.QFrame.StyledPanel)

self.right = QtGui.QFrame(self)
self.right.setFrameShape(QtGui.QFrame.StyledPanel)