问wxpython如何防止BoxSizer在调整窗口大小时崩溃？

EN

import wx
from wx.lib.mixins.listctrl import ListCtrlAutoWidthMixin

#from processor import process_xls

class MainFrame(wx.Frame):

    TITLE = 'Neko'
    FRAME_MIN_SIZE = (600, 300)
    DEFAULT_BORDER_SIZE = 10

    INPUT_LABEL = 'Input files : '
    ADD_LABEL = 'Add'

    REMOVE_LABEL = 'Remove'
    START_LABEL = 'Start'

    FILE_LABEL = 'File'
    SIZE_LABEL = 'Size'
    PERCENT_LABEL = 'Percent'
    ETA_LABEL = 'ETA'
    SPEED_LABEL = 'Speed'
    STATUS_LABEL = 'Status'
    STATUS_LIST = {
        'filename': (0, FILE_LABEL, 120, True),
        'size': (1, SIZE_LABEL, 60, False),
        'percent': (2, PERCENT_LABEL, 80, False),
        'eta': (3, ETA_LABEL, 60, False),
        'speed': (4, SPEED_LABEL, 60, False),
        'status': (5, STATUS_LABEL, 90, False),
    }

    def __init__(self, *args, **kwargs):
        super(MainFrame, self).__init__(*args, **kwargs)

        self.SetTitle(self.TITLE)
        self.SetSize(self.FRAME_MIN_SIZE)

        self._panel = wx.Panel(self)
        self._vertical_box = wx.BoxSizer(wx.VERTICAL)

        # Inputs
        self._horizontal_box_input = wx.BoxSizer(wx.HORIZONTAL)

        self._tc_file_picker = wx.TextCtrl(self._panel)
        self._horizontal_box_input.Add(self._tc_file_picker,
                                    proportion=1, flag=wx.EXPAND)

        self._button_add = wx.Button(self._panel,
                                label=self.ADD_LABEL,
                                size=(-1,-1))
        self._button_add.Bind(wx.EVT_BUTTON,
                            self._on_add)
        self._horizontal_box_input.Add(self._button_add,
                                    flag=wx.LEFT,
                                    border=self.DEFAULT_BORDER_SIZE)

        self._vertical_box.Add(self._horizontal_box_input,
                            flag=wx.EXPAND|wx.LEFT|wx.RIGHT|wx.TOP,
                            border=self.DEFAULT_BORDER_SIZE)

        # Status List
        self._status_list = ListCtrl(self.STATUS_LIST,
                                parent=self._panel,
                                style=wx.LC_REPORT | wx.LEFT | wx.RIGHT)
        self._horizontal_box_status_list = wx.BoxSizer(wx.HORIZONTAL)
        self._horizontal_box_status_list.Add(self._status_list,
                                        proportion=1, flag=wx.EXPAND)

        status_list_buttons_data = {
            ('remove', self.REMOVE_LABEL, (-1, -1), self._on_remove, wx.Button),
            ('start', self.START_LABEL, (-1, -1), self._on_start, wx.Button),
        }

        # Create buttons vertically
        self._vertical_control_box = wx.BoxSizer(wx.VERTICAL)
        for item in status_list_buttons_data:
            name, label, size, evt_handler, parent = item

            button = parent(self._panel, size=size)

            if parent == wx.Button:
                button.SetLabel(label)

            if evt_handler is not None:
                button.Bind(wx.EVT_BUTTON, evt_handler)

            self._vertical_control_box.Add(button,
                                        flag=wx.LEFT|wx.BOTTOM|wx.EXPAND,
                                        proportion=1,
                                        border=self.DEFAULT_BORDER_SIZE)

        self._horizontal_box_status_list.Add(self._vertical_control_box)

        self._vertical_box.Add(self._horizontal_box_status_list,
                            flag=wx.EXPAND|wx.LEFT|wx.RIGHT|wx.TOP,
                            border=self.DEFAULT_BORDER_SIZE)

        # Set Sizer
        self._panel.SetSizerAndFit(self._vertical_box)

        #If you want the listctrl and textctrl to have a minimum size
        #open_size = self.GetSize()
        #self.SetMinSize(open_size)

        self.Show()

    def _on_add(self, event):
        pass

    def _on_remove(self, event):
        pass

    def _on_start(self, event):
        pass

class ListCtrl(wx.ListCtrl, ListCtrlAutoWidthMixin):
    def __init__(self, columns, *args, **kwargs):
        super(ListCtrl, self).__init__(*args, **kwargs)
        ListCtrlAutoWidthMixin.__init__(self)

        self.columns = columns
        self._set_columns()

    def _set_columns(self):
        for column_item in sorted(self.columns.values()):
            self.InsertColumn(column_item[0], column_item[1], width=wx.LIST_AUTOSIZE_USEHEADER)

            # If the column width obtained from wxLIST_AUTOSIZE_USEHEADER
            # is smaller than the minimum allowed column width
            # then set the column width to the minumum allowed size
            if self.GetColumnWidth(column_item[0]) < column_item[2]:
                self.SetColumnWidth(column_item[0], column_item[2])

            # Set auto-resize if enabled
            if column_item[3]:
                self.setResizeColumn(column_item[0])
if __name__ == "__main__":

    app = wx.App()
    MainFrame(None)
    app.MainLoop()