Re: TreeView Design

[Samvel <ksamdev gmail com>]

On Thu, 31 Aug 2006 09:10:04 -0500, Gareth Foster  
<earthwormgaz googlemail com> wrote:

> > have you not read any of the examples? of course its possible.
>
> To make this clearer, I seem to hit the following trouble in trying to
> ape the GTKmm API.
>
> The problem really is how can I have a container that stores various
> instances of a templated class, and be able to meaningfully interact
> with the classes in that container. For example, assign them.
>
> <code>
> struct Base;
>
> template <typename T>
> struct Derived { T member; };

Did you mean:

struct Derived: public Base { ... };

? Otherwise can not understand the role of Derived template in a given  
example.

> std::list<Base *> myList;
>
> for(std::list<Base *>::iterator it = myList.begin(); it != myList.end();  
> ++ it)
> {
>   it->member = ???

it->member = <any pointer to a class/struct that derived from Base>;

> }
>
> I can see that the TreeModelColumnBase class, and a templated
> derivation of it allow me to keep a list of columns that contain an
> arbitary data type, but I can't then see how I can later assign that
> data, in this case when iterating the tree model.
> _______________________________________________
> gtkmm-list mailing list
> gtkmm-list gnome org
> http://mail.gnome.org/mailman/listinfo/gtkmm-list



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