wxPython 的 wx.grid.Grid() 不会完全进入视野

Question

问题：

我遇到了一个问题，即在一个地方调用时仅创建 Grid() 的函数可以工作，但在另一个地方则不能。当它从 "other," 非工作位置调用时，它会在 window 的角落创建一个非常小的正方形。这个时候我不明白为什么，希望有人能帮忙。

代码：（随意将其复制粘贴到文本编辑器中，试试吧！）

import wx
import wx.grid as gridlib


class MainFrame(wx.Frame):

    def __init__(self, parent, title):
        super(MainFrame, self).__init__(parent, title=title,
                                        size=(350, 250))
        self.init_ux()
        self.main_grid = None

    def init_ux(self):
        menu_bar = wx.MenuBar()
        file_menu = wx.Menu()

        file_menu.AppendSeparator()
        menu_bar.Append(file_menu, '&File')

        # add open file menu
        open_menu = wx.Menu()
        my_btn = open_menu.Append(wx.ID_ANY, 'button description')

        # append open_menu to the file_menu
        file_menu.Append(wx.ID_OPEN, '&Open', open_menu)
        self.SetMenuBar(menu_bar)
        self.Bind(wx.EVT_MENU, lambda event: self.open_dialog(data="i love string literals."), my_btn)
        self.SetSize((300, 200))
        self.Centre()
        # the create_grid_view() below DOES work when uncommented
        #self.create_grid_view(10, 10)

    def create_grid_view(self, row_count, col_count):
        print("Creating grid view!")
        # set up grid panel
        panel = wx.Panel(self)
        self.main_grid = gridlib.Grid(panel)
        self.main_grid.CreateGrid(row_count, col_count)

        sizer = wx.BoxSizer(wx.VERTICAL)
        sizer.Add(self.main_grid, 1, wx.EXPAND)
        panel.SetSizer(sizer)

    def open_dialog(self, data):

        # data is being used for populating wildcard, etc

        with wx.FileDialog(self, "Open a file!",
                           style=wx.FD_OPEN | wx.FD_FILE_MUST_EXIST) as fileDialog:

            if fileDialog.ShowModal() == wx.ID_CANCEL:
                return

            file_path = fileDialog.GetPath()
            try:
                # here, I do some fun data "things" with the file_path
                # open it, use other functions, etc.
                # afterwards, I need to create a grid
                self.create_grid_view(10, 10)
                # ^^ This creates a small square instead of a grid.

            except IOError:
                wx.LogError("Cannot open file '%s'." % file_path)


if __name__ == "__main__":
    app = wx.App()

    frame = MainFrame(None, title='Window Title :)')
    frame.Show()

    app.MainLoop()

期望：

实际结果:

总结：

为什么 create_grid_view() 函数从 init_ux() 函数调用时显示正确的网格，而不是 open_dialog() 函数？

提前致谢！

Answer 1

你有 panel.SetSizer(sizer) 要么使用：

panel.SetSizerAndFit(sizer)

或使用：

panel.SetSizer(sizer)
panel.Fit()

wxPython 的 wx.grid.Grid() 不会完全进入视野

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