Re: [Wxlua-users] wxGrid cell renderer

On 7/30/06, Richard Simes <ric...@gm...> wrote:
> I have just started writing a spreadsheet program in lua that supports
> functions, cell ranges and sorting. have got to the point where it really
> needs a user interface to be useable to anyone so am investigating wxLua.

Lua should make scripting arbitrary functions fairly easy.

> How can I use a wxGrid in such a way that the value typed into a cell is not
> the same as the value displayed? (if a function is inputted)

This is probably best done using a lua table in addition to the
wxGrid's "cell value" which is just the displayed string value. The
lua table could store the values using a string represenation of the
coords, eg. string.format("%d, %d", row, col).

> I imagine i need to call grid:SetDefaultRenderer()
> can a cell renderer object be defined from lua? As it's user-data, I suspect
> this might not be possible?

SetDefaultRenderer has been broken in wxWidgets for years, I submitted
a patch quite some time ago, but I think it's been lost since.

You can catch the events for set cell value and put them into a
separate lua table and then write to the wxGrid what the output of the
function or whatever was entered should be. I think this would be
simplest and should be enough.

> Help would be appreciated, though I suppose I should read up on wxWidgets a
> bit more before I launch into this myself...

The wxGrid component is hard to get a handle on at first glance, but
hopefully since you don't have to compile as in C++ you can get
something going fairly quickly.

Regards,
    John Labenski