Re: [wxlua-users] Change style of TreeCtrl

In article <a84...@ma...>,
   John Labenski <jla...@gm...> wrote:
> On Wed, Oct 21, 2009 at 9:30 AM, Michael Gerbracht <sma...@ar...>
> wrote:

> > Is it possible to change the style of a TreeCtrl once it has been
> > created. I want to make it user configurable whether lines are shown or
> > not - so is there a was to set/unset wx.wxTR_NO_LINES ?
> Unfortunately the styles do not take effect in MSW. You could Destroy() the
> control and recreate it if you also store the data as a Lua table.
> http://docs.wxwidgets.org/stable/wx_wxtreectrl.html#wxtreectrlsetwindowstyle

I store the data in lua anyway so this should not be a problem. Or changes
will just apply after a restart. Still I am not sure how to set the style
upon creation. I use the following code to create it: 

    local tree = wx.wxTreeCtrl(this, wx.wxID_ANY,wx.wxPoint(0,0),
                 wx.wxSize(160,250),wx.wxTR_DEFAULT_STYLE + wx.wxTR_NO_LINES 
                 + wx.wxTR_HIDE_ROOT + wx.wxTR_MULTIPLE + wx.wxNO_BORDER);

The styles are separated by a "+" sign, which is not standard lua so I do not
know how to make a style optional. I tried to use a variable instead of
"wx.wxTR_NO_LINES" and set it to either nil or "wx.wxTR_LINES". Both fail.
One possibility might be to define two sets of styles, one including
"wx.wxTR_NO_LINES" and the other one not. This works if you only want to make
one style configuarable.

Is there a better/more flexible way to define the styles?

Thanks,
Michael