Resizing a wx python dialog does not work on windows

Question

I have a dialog that I want to be resizable. It works perfectly on Linux, but on Windows it will not resize.

I know there is a get around using a wx.Frame and MakeModal, but why won't this work?

import wx


class TestDialog(wx.Dialog):
    MIN_SIZE = (200, 100)
    def __init__(self, *args, **kwargs):
        super(TestDialog, self).__init__(None, *args, **kwargs)
        self.panel = MainPanel(self)
        self.Title = 'Test dialog'
        self.Bind(wx.EVT_CLOSE, self.on_quit_click)
        sizer = wx.BoxSizer(wx.VERTICAL)
        sizer.Add(self.panel)
        self.SetSizer(sizer)

        self.SetMinSize(self.MIN_SIZE)
        self.SetSize(self.MIN_SIZE)

        self.status = wx.ID_CANCEL

    def on_cmd_ok_click(self, event):
        self.status = wx.ID_OK
        self._tear_down

    def on_quit_click(self, event):
        self._tear_down()

    def _tear_down(self):
        self.Destroy()


class MainPanel(wx.Panel):
    def __init__(self, parent, *args, **kwargs):
        super(MainPanel, self).__init__(parent, *args, **kwargs)
        self.parent = parent

        name_sizer = self._name_sizer(parent)
        button_sizer = self._button_sizer(parent)

        sizer = wx.BoxSizer(wx.VERTICAL)
        sizer.Add(name_sizer, flag=wx.EXPAND)
        sizer.Add(button_sizer, flag=wx.EXPAND)
        self.SetSizer(sizer)

    def _name_sizer(self, parent):
        lbl_name = wx.StaticText(self, label='Name:')
        self.txt_name = wx.TextCtrl(self, size=(2000, -1))
        sizer = wx.BoxSizer(wx.HORIZONTAL)
        sizer.Add(lbl_name, flag=wx.ALIGN_CENTER)
        sizer.Add(self.txt_name, flag=wx.EXPAND)
        return sizer

    def _button_sizer(self, parent):
        cmd_action = wx.Button(self, id=wx.ID_OK)
        cmd_cancel = wx.Button(self, wx.ID_EXIT)
        cmd_action.Bind(wx.EVT_BUTTON, parent.on_cmd_ok_click)
        cmd_cancel.Bind(wx.EVT_BUTTON, parent.on_quit_click)

        sizer = wx.BoxSizer(wx.HORIZONTAL)
        sizer.Add(cmd_action)
        sizer.Add((0, 0), proportion=1)
        sizer.Add(cmd_cancel)
        return  sizer

if __name__ == '__main__':
    wx_app = wx.App()
    TestDialog().ShowModal()
    wx_app.MainLoop()

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Answer 1

The problem is that you are using the default style of a wx.Dialog and this seems to change from one OS to the other.

You only need to define your custom style by changing the line:

super(TestDialog, self).__init__(None, *args, **kwargs)

to:

super(TestDialog, self).__init__(None, *args, style=wx.RESIZE_BORDER|wx.CAPTION|wx.CLOSE_BOX, **kwargs)