Re: [wxlua-users] Change style of TreeCtrl

On Thu, Oct 22, 2009 at 3:28 AM, Michael Gerbracht <sma...@ar...> wrote:
> In article <a84...@ma...>,
>   John Labenski <jla...@gm...> wrote:
>> On Wed, Oct 21, 2009 at 9:30 AM, Michael Gerbracht <sma...@ar...>
>> wrote:
>
> 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?

These styles are simply numeric bit masks so that adding them together
is the same as using a boolean OR operator on the numbers. Instead of
setting it to nil set it to 0.

wx.wxTR_LINES does not exist, I think you want wx.wxTR_LINES_AT_ROOT.

http://docs.wxwidgets.org/stable/wx_wxtreectrl.html#wxtreectrl

Regards,
     John