How to update window after wxGrid is updated?

[Tim Williams]

Hi.

I'm starting to learn wxPython and for an exercise I'm writing a
simple CSV file viewer. I just read in the CSV file and create a
wx.Grid with the data.  I'm using Python 2.3.2 with wxPython 2.4.2.4.

Everything runs fine under linux, but when I try the same code on a
Win XP machine, I have a window, but the frame the grid is in isn't
seen until I do a minimize/maximize on the window. Besides that, it
seems to run fine.  I tried to do a self.Refresh(True,
self.grid.GetRect()), but that didn't help.

Here is the code:

#!/bin/env python

"""
Python script to display CSV file in a table using wxPython
"""

import os, sys, csv
import wx, wx.grid

class MyFrame(wx.Frame):
    def __init__(self, parent, ID, title, size=(200,200)):
        wx.Frame.__init__(self, parent, ID, title,
                          (-1,-1),size)
        self.CreateStatusBar()

        self.dirname=os.getcwd()

        #create the file menu
        filemenu=wx.Menu()
        filemenu.Append(wx.ID_OPEN, '&Open', 'Open CSV File')
        filemenu.Append(wx.ID_EXIT, 'E&xit', 'Exit the program')

        #create the menubar for the frame and add the menu to it
        menuBar=wx.MenuBar()
        menuBar.Append(filemenu, '&File')
        self.SetMenuBar(menuBar)

        #set up menu events
        wx.EVT_MENU(self, wx.ID_OPEN, self.OnOpen)
        wx.EVT_MENU(self, wx.ID_EXIT, self.Exit)

        self.Show(True)
        return 
        
    def OnOpen(self, event):
        dlg=wx.FileDialog(self, 'Choose a file',
                          self.dirname, '', 
                          'CSV files (*.csv)|*.csv|All files
(*.*)|*.*',
                          wx.OPEN)
        if dlg.ShowModal() == wx.ID_OK:
            self.dirname=dlg.GetDirectory()
            self.filename=os.path.join(self.dirname,dlg.GetFilename())
            self.file=file(self.filename, 'r')
            csvfile=csv.reader(self.file)

            #grab a sample and see if there is a header
            sample=self.file.read(8192)
            self.file.seek(0)
            if csv.Sniffer().has_header(sample):
                colnames=csvfile.next()
            else:
                row=csvfile.next()
                colnames=[]
                for i in len(row):
                    colnames.append('col%d' % i)
                self.file.seek(0)

            if getattr(self, 'grid', 0): self.grid.Destroy()
            self.grid=wx.grid.Grid(self, -1)
            self.grid.CreateGrid(0, len(colnames))

            #fill in headings
            for i in range(len(colnames)):
                self.grid.SetColLabelValue(i, colnames[i])

            #fill in rows
            r=0
            for row in csvfile:
                self.grid.AppendRows(1)
                for i in range(len(row)):
                    try:
                        self.grid.SetCellValue(r, i, row[i])
                    except:
                        self.grid.AppendCols(1, True)
                        print r, i, len(row), row[i]
                r += 1
            self.file.close()
            self.grid.AutoSizeColumns(True)
            self.Refresh(True, self.grid.GetRect())

    def Exit(self, event):
        if getattr(self, 'file',0):
            self.file.close()
        self.Close(True)

class csv_view(wx.App):
    def OnInit(self):
        self.frame=MyFrame(None, -1, 'CSV viewer', size=(800,500))
        self.SetTopWindow(self.frame)
        return True

if __name__ == '__main__':
    app=csv_view()
    app.MainLoop()

##########################

Thanks for any help.