How to center a wx.Grid in wxPython

Question

I am trying to center a wx.grid.Grid in wxPython. I have tried every possible combination of ID parameter 1,0,-1. I have tried to add wx.ALIGN_CENTER_HORIZONTAL to many sizers. I have been working on this for a few days now, any help would be greatly appreciated.

My question is: "How do I center my wxgrid?"

Here is my Code:

main.py

import wx
from LogView import LogView

class MyFrame(wx.Frame):
    """ We simply derive a new class of Frame. """
    def __init__(self, parent, ID, title):
        wx.Frame.__init__(self, parent, ID, title=title, size=(850,725))

        self.main = wx.Panel(self)

        self.nb = wx.Notebook(self.main, 1)
        self.logView = LogView(parent=self.nb, ID=-1)
        self.mainSizer = wx.BoxSizer(wx.VERTICAL)

        self.nb.AddPage(self.logView, "Log")

        # Create sizers
        self.mainSizer = wx.BoxSizer(wx.VERTICAL)

        # Adding Objects to mainSizer
        self.mainSizer.AddSpacer(10)
        self.mainSizer.Add(self.nb, 1, wx.ALL|wx.EXPAND)

        # Set main sizer
        self.main.SetAutoLayout(True)
        self.main.SetSizer(self.mainSizer)
        self.mainSizer.Fit(self.main)
        self.Layout()
        self.Centre(wx.BOTH)
        self.Show()

app = wx.App(False)
frame = MyFrame(None, -1, 'TFM UI')
app.MainLoop()

LogView.py

import wx
from GridTable import GridTable
class LogView(wx.Panel):
    def __init__(self, parent, ID):
        wx.Panel.__init__(self, parent, ID)
        self.sizer = wx.BoxSizer(wx.VERTICAL)

        self.gridPnl = wx.Panel(self)
        self.gridPnlSizer = wx.BoxSizer(wx.VERTICAL)

        self.grid = GridTable(self.gridPnl)

        self.gridPnlSizer.AddStretchSpacer()
        self.gridPnlSizer.Add(self.grid,-1,wx.EXPAND|wx.ALIGN_CENTER_HORIZONTAL)
        self.gridPnlSizer.AddStretchSpacer()

        self.gridPnl.SetAutoLayout(True)
        self.gridPnl.SetSizer(self.gridPnlSizer)
        self.gridPnlSizer.Fit(self.gridPnl)

        self.sizer.AddSpacer(25)
        self.sizer.Add(self.gridPnl,-1,wx.EXPAND)


        self.SetAutoLayout(True)
        self.SetSizer(self.sizer)
        self.sizer.Fit(self)

GridTable.py

import wx
import wx.grid

class GridTable(wx.grid.Grid):
    def __init__(self, parent):
        #colDisplay should be a list

        wx.grid.Grid.__init__(self, parent)
        self.CreateGrid(100,3)
        for i in xrange(3):
            if i==0:
                self.SetColLabelValue(i, "Col"+str(i))
                self.SetColSize(i,85)
            else:
                self.SetColLabelValue(i, "Col"+str(i))
                self.SetColSize(i,150)


        for i in xrange(100):
            #clear grid
            self.SetRowLabelValue(i, str(i+1))
            for j in xrange(3):
                self.SetCellValue(i,j,"")
                if i==0:
                    self.SetCellBackgroundColour(i, j, wx.LIGHT_GREY)
                elif i%2==0:
                    self.SetCellBackgroundColour(i, j, wx.LIGHT_GREY)
                else:
                    self.SetCellTextColour(i, j, wx.BLACK)
                    self.SetCellBackgroundColour(i, j, wx.WHITE)

        for i in xrange(100):
            if i==0:
                for j in xrange(3):
                    if j == 0:
                        self.SetRowLabelValue(i, str(i+1))
                        self.SetCellValue(i,j,str("Col"+str(j)))
                        self.SetCellBackgroundColour(i, j, wx.LIGHT_GREY)
                    else:
                        self.SetCellValue(i,j,str("Col"+str(j)))
                        self.SetCellBackgroundColour(i, j, wx.LIGHT_GREY)
            elif i%2==0:
                for j in xrange(3):
                    if j == 0:
                        self.SetRowLabelValue(i, str(i+1))
                        self.SetCellValue(i,j,str("Col"+str(j)))
                        self.SetCellBackgroundColour(i, j, wx.LIGHT_GREY)
                    else:
                        self.SetCellValue(i,j,str("Col"+str(j)))
                        self.SetCellBackgroundColour(i, j, wx.LIGHT_GREY)
            else:
                for j in xrange(3):
                    if j == 0:
                        self.SetRowLabelValue(i, str(i+1))
                        self.SetCellValue(i,j,str("Col"+str(j)))
                        self.SetCellTextColour(i, j, wx.BLACK)
                        self.SetCellBackgroundColour(i, j, wx.WHITE)
                    else:
                        self.SetCellValue(i,j,str("Col"+str(j)))
                        self.SetCellTextColour(i, j, wx.BLACK)
                        self.SetCellBackgroundColour(i, j, wx.WHITE)

Answer 1

Looking at this line from LogView.py:

self.gridPnlSizer.Add(self.grid,-1,wx.EXPAND|wx.ALIGN_CENTER_HORIZONTAL)

For starters, you're using a proportion of -1, which I think is undefined. It causes Python to crash on my machine, so... that's not great. The default is 0.

Second, you're telling the sizer to expand the widget. I guess if the widget takes up all the available space, it's certainly centered by one definition, but I don't think that's what you mean.

Finally, the stretch spacers are unnecessary. So replace that block of three lines with:

self.gridPnlSizer.Add(self.grid,flag=wx.ALIGN_CENTER_HORIZONTAL)

When I do that, I end up with:

Answer 2

self.my_grid.SetRowLabelSize(0) # hides the row # & horizontal scrollbar

You could use this and then add a column with your own row numbers.