wxPython:使用TextEditMixin时出现基类错误

Question

我试图创建ListCtrl派生类来添加两个函数，set_data和_set_column_width，下面是代码：

class ListReport(wx.ListCtrl, listmix.ListCtrlAutoWidthMixin):
    def __init__(self, parent=None,  columns=['DEFAULT'], size=wx.DefaultSize,
                 pos=wx.DefaultPosition, style=wx.LC_REPORT|wx.LC_VRULES):
        wx.ListCtrl.__init__(self, parent, wx.ID_ANY, pos, size, style)
        listmix.ListCtrlAutoWidthMixin.__init__(self)
        self.columns = columns
        self.column_index = len(columns)
        self.InsertColumn(0, 'No.')
        for enum, column in enumerate(columns):
            enum += 1
            self.InsertColumn(enum, column)
    def set_data(self, data):
        # Change all data into str
        values = [map(str, value) for value in data]
        for enum, value in enumerate(values):
            enum += 1
            first = self.InsertStringItem(sys.maxint, str(enum))
            for x in range(self.column_index):
                if value[x] == None:
                    self.SetStringItem(first, x+1, '-')
                else:
                    self.SetStringItem(first, x+1, value[x])
            # Give ListCtrl some colors
            if first % 2:
                self.SetItemBackgroundColour(first, 'E8E8E8')
            else:
                self.SetItemBackgroundColour(first, '#FBFF94')
        self._set_column_width(data)
    def _set_column_width(self, data=None):
        """Automatically resize column based on data or column header
        if column header longer than data using wx.LIST_AUTOSIZE_USEHEADER
        else using data instead.
        """
        for x in range(self.column_index):
            longest = max([len(str(row[x])) for row in data])
            if len(self.columns[x]) + 3 > longest:
                self.SetColumnWidth(x+1, wx.LIST_AUTOSIZE_USEHEADER)
            else:
                self.SetColumnWidth(x+1, wx.LIST_AUTOSIZE)
        self.SetColumnWidth(0, 37)
        self.resizeLastColumn(0)

然后，我使用上面的类创建另一个具有TextEditMixin 的类

class ListReportEdit(ListReport, listmix.TextEditMixin):
    def __init__(self, parent=None, columns=['DEFAULT'], size=wx.DefaultSize,
                 pos=wx.DefaultPosition, style=wx.LC_REPORT|wx.LC_VRULES):
        ListReport(parent, columns, size, pos, style)
        listmix.TextEditMixin.__init__(self)

但是，我在尝试使用时遇到了这个错误

Traceback (most recent call last):
  File "wxform_sandbox.py", line 263, in <module>
    a = Sandbox()
  File "wxform_sandbox.py", line 27, in __init__
    lr = ListReportEdit(panel, columns, size=(400, 300))
  File "wxform_sandbox.py", line 145, in __init__
    listmix.TextEditMixin.__init__(self)
  File "C:Program FilesPython27libsite-packageswx-2.8-msw-unicodewxlibmixinslistctrl.py", line 451, in __init__
    self.make_editor()
  File "C:Program FilesPython27libsite-packageswx-2.8-msw-unicodewxlibmixinslistctrl.py", line 466, in make_editor
    editor = wx.TextCtrl(self, -1, style=style)
  File "C:Program FilesPython27libsite-packageswx-2.8-msw-unicodewx_controls.py", line 1736, in __init__
    _controls_.TextCtrl_swiginit(self,_controls_.new_TextCtrl(*args, **kwargs))
TypeError: in method 'new_TextCtrl', expected argument 1 of type 'wxWindow *'

但是，当我使用wx.ListCtrl作为ListReportEdit的基类而不是ListReport时，它可以完美地工作，我不清楚python继承是如何工作的。

提前感谢

Answer 1

试试这个，你还没有调用parents init方法（好吧，你已经调用了，但你正在创建一个新的ListReport对象）

class ListReportEdit(ListReport, listmix.TextEditMixin):
    def __init__(self, parent=None, columns=['DEFAULT'], size=wx.DefaultSize,
                 pos=wx.DefaultPosition, style=wx.LC_REPORT|wx.LC_VRULES):
        ListReport.__init__(self,parent, columns, size, pos, style)
        listmix.TextEditMixin.__init__(self)