# -*- coding: utf-8 -*-
import wx
import math


class Example(wx.Dialog):
    def __init__(self, cb_titles, title):
        super().__init__(None, title=title)
        self.cb_labels = cb_titles
        self.panel = wx.Panel(self)
        self.initUI()
        self.Centre()
        self.ShowModal()

    def initUI(self):
        vbox = wx.BoxSizer(wx.VERTICAL)  # I use vbox here because I need to add other items below this grid sizer, not shown in the example.
        self.set_grid(vbox)
        border = wx.BoxSizer()
        border.Add(vbox, 1, wx.ALL | wx.EXPAND, 10)
        self.panel.SetSizer(border)
        self.panel.Fit()

    def set_grid(self, vbox):
        n_cbs = len(self.cb_labels)
        n_col = int(math.sqrt(n_cbs))
        n_row = n_col
        while n_row * n_col < n_cbs:
            n_row += 1
        sb = wx.StaticBox(self.panel, -1, 'CheckBoxes:')
        sb_sizer = wx.StaticBoxSizer(sb, wx.VERTICAL)
        grid_sizer = wx.GridSizer(n_row, n_col, 30)

        for i in range(n_cbs):
            cb_label = self.cb_labels[i]
            cb = wx.CheckBox(self.panel, label=cb_label)
            grid_sizer.Add(cb, 1, wx.ALIGN_CENTER_VERTICAL|wx.EXPAND)
        sb_sizer.Add(grid_sizer, 1, wx.ALL|wx.CENTER, 10)
        vbox.Add(sb_sizer, 1, wx.CENTER, 0)





app = wx.App()
cb_titles = ["aaaaaaaaaaa", "bbbbbbb", "cccccccccc", "ddddddd", "eeeeeeee", "ffffffffff", "DDDDDDDDDD", 'FFFFFFFFFFFFFF', "GGGGGGGGGG"] * 3  # you can change this number
Example(cb_titles, title ='Question Example')
app.MainLoop()