[litwindow-users] Re: wxListCtrl and library status

[Hajo K. <mai...@ha...>]

Hi Hajo,

Thanks for the prompt reply.

I spent some time today trying to add ListCtrl support. I was using the 0.3
code but now I've updated to CVS head.

I have left the existing interface the same, making minimal modifications
and additions to handle multi-columns. I am not yet comfortable with how
much of the interface can/should be modified.

Originally, I was also trying to leave FillList() unchanged, but I finally
realized that since it calls ClearList internally (destroying any columns),
that I had to modify FillList. So I've made appropriate modifications in my
wxListCtrlAdapter class. My initial strategy seemed elegant but may be
flawed. I thought it would be nice to pass an aggregate to a function, say
SetColumns(), and have the columns created from the struct elements. Then
one would merely pass a container of that aggregate and the elements of each
aggregate would be placed into the column associated the respective
structure element. The problem, of course, is that the internal names may
not be appropriate for use in the UI.

I made enough progress that my ListCtrl without distinct columns is being
populated. This was a straightforward modeled after wxListBox. When I tried
to extend it to include columns I encountered two problems. First, I tried
to add two functions, SetColumns and GetColumns.

Class wxListCtrlAdapter {
...
void SetColumns(const accessor &newValue);
const accessor &GetColumns() const;
...
}

BEGIN_ADAPTER_NO_COPY(wxListCtrlAdapter)
PROP_I(lwListAdapterBase)
PROP_GetSet(accessor, Columns)
END_ADAPTER()

However, when I create a rule:

RULE("m_IPListWindow.Columns", make_expr<accessor>("m_targetlist"))

I get an error thrown stating that the "GetAccessor couldn't find a variable
' m_IPListWindow.Columns'"

When I compare to the Items and Column property, I only find a PROP_GetSet
declaration. I must be missing something obvious. How do I create a new
property?

My second problem, is one related to my original design. I am not sure how
to initialize the columns if I don't have an instance of the aggregate to
pass. Perhaps, though, there is a better way to pass the column names and
associations between the columns and the aggregate contents. Any
suggestions on this front?

Thanks,
Joel