CODEWITHSUNDEEP
formattingwxpythonlistctrl
user95469
user95469

Reputation:

Cannot format first column in WxPython's ListCtrl

If I set the format of the first column in a ListCtrl to align centre (or align right) nothing happens. It works for the other columns.

This only happens on Windows - I have tested it on Linux and it works fine. Does anyone know if there is a work-round or other solution?

Here is an example based on code found at http://zetcode.com/wxpython/

import wx
import sys

packages = [('jessica alba', 'pomona', '1981'), ('sigourney weaver', 'new york',    '1949'),
    ('angelina jolie', 'los angeles', '1975'), ('natalie portman', 'jerusalem', '1981'),
    ('rachel weiss', 'london', '1971'), ('scarlett johansson', 'new york', '1984' )]

class Actresses(wx.Frame):
    def __init__(self, parent, id, title):
        wx.Frame.__init__(self, parent, id, title, size=(380, 230))

        hbox = wx.BoxSizer(wx.HORIZONTAL)
        panel = wx.Panel(self, -1)

        self.list = wx.ListCtrl(panel, -1, style=wx.LC_REPORT)
        self.list.InsertColumn(0, 'name', wx.LIST_FORMAT_CENTRE,width=140)
        self.list.InsertColumn(1, 'place', wx.LIST_FORMAT_CENTRE,width=130)
        self.list.InsertColumn(2, 'year', wx.LIST_FORMAT_CENTRE, 90)

        for i in packages:
            index = self.list.InsertStringItem(sys.maxint, i[0])
            self.list.SetStringItem(index, 1, i[1])
            self.list.SetStringItem(index, 2, i[2])

        hbox.Add(self.list, 1, wx.EXPAND)
        panel.SetSizer(hbox)

        self.Centre()
        self.Show(True)

app = wx.App()
Actresses(None, -1, 'actresses')
app.MainLoop()

Upvotes: 1

Views: 1716

Answers (2)

robots.jpg
robots.jpg

Reputation: 5161

Windows definitely treats the first column differently. One workaround is to create an empty column 0 and hide it:

class Actresses(wx.Frame):
    def __init__(self, parent, id, title):
        wx.Frame.__init__(self, parent, id, title, size=(380, 230))
        #...

        self.list = wx.ListCtrl(panel, -1, style=wx.LC_REPORT)
        self.list.InsertColumn(0, '', width=0)
        self.list.InsertColumn(1, 'name', wx.LIST_FORMAT_CENTRE,width=140)
        self.list.InsertColumn(2, 'place', wx.LIST_FORMAT_CENTRE,width=130)
        self.list.InsertColumn(3, 'year', wx.LIST_FORMAT_CENTRE, width=90)

        for i in packages:
            index = self.list.InsertStringItem(sys.maxint, '')
            self.list.SetStringItem(index, 1, i[0])
            self.list.SetStringItem(index, 2, i[1])
            self.list.SetStringItem(index, 3, i[2])

        # catch resize event
        self.list.Bind(wx.EVT_LIST_COL_BEGIN_DRAG, self.OnColDrag)
        #...

    def OnColDrag(self, evt):
        if evt.m_col == 0:
            evt.Veto()

I can't think of any major side-effects from doing this, but let me know if I'm wrong. I guess GetItemText() or anything else that assumes there is useful data in the first column would no longer be useful.

Edit - added code to prevent resizing column 0.

Upvotes: 0

user95469
user95469

Reputation:

I have found that this works (notice I start inserting the columns at 1 rather than 0):

    self.list = wx.ListCtrl(panel, -1, style=wx.LC_REPORT)
    self.list.InsertColumn(1, 'name', wx.LIST_FORMAT_CENTRE,width=140)
    self.list.InsertColumn(2, 'place', wx.LIST_FORMAT_CENTRE,width=130)
    self.list.InsertColumn(3, 'year', wx.LIST_FORMAT_CENTRE, 90)

Not sure why this works, but it does. Hopefully, there will be no repercussions from doing this.

Thanks to robots.jpg for inspiring the idea.

Upvotes: 2

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