Re: Check an empty Gtk::TreeIter?

["Andrew E. Makeev" <andrew solvo ru>]

just test iterator on boolean value:

void Base::checkEmptyIter()
{
    if( !iter )
    {
        std::cout << "iterator is empty (invalid)" << std::endl;
    }
}

В Срд, 02/11/2011 в 23:33 -0400, Phong Cao пишет:
> Hello everybody,
> 
> I am current stuck with how to check an empty, uninitialized
> Gtk::TreeIter. I have checked out the documentation for Gtk::TreeIter,
> Gtk::TreePath & Gtk::TreeModel & have not found any function for
> checking an empty Gtk::TreeIter. Here is what I did, but it was not
> compiled:
> 
> #include <iostream>
> 
> class Base {
>   public:
>     Base();
>     virtual ~Base();
> 
>     void checkEmptyIter();
> 
>   private:
>     Gtk::TreeModel::iterator iter;
> };
> 
> Base::Base() {
>   //the treeiter is not initialized to make sure it is empty
> }
> 
> Base::~Base() {
> }
> 
> void Base::checkEmptyIter() {
>   if (iter == NULL) {                                          //can't
> compile
>     std::cout << "d_iter is empty" << std::endl; 
>   }
> }
> 
> Does anybody know anyway to check if a Gtk::TreeIter is empty? 
> 
> Thank you for reading my message and I hope you guys have a good week!
> 
> -- 
> Phong V. Cao
> phngcv gmail com
> 
> 
> 
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-- 
Andrew E. Makeev <andrew solvo ru>
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