Re: changing the content of a model/view/store at run time

[Phil Wolff <adiabat centurylink net>]

From the Gtk::TreeModel reference: "This class defines a generic tree 
interface for use by the Gtk::TreeView widget. ... It is important to 
note that *this interface only provides a way of examining a model and 
observing changes. The implementation of each individual model decides 
how and if changes are made.*"

Have a look at Gtk::TreeStore and Gtk::ListStore, which are 
implementations based on Gtk::TreeModel. One or the other will likely 
provide the functionality you're looking for.

On 8/8/19 2:46 PM, pcr wrote:
> I'm trying to learn how to iterate over model rows in a manner similar 
> to the code segment in section 9.3 of the gnome gtkmm tutorial.  
> Consider me a newbie; the "something" I want to do below is 
> delete/clear/erase a row - really all rows so I can display a new set 
> of rows in response to a user action like changing a radio button.  
> But I haven't been able to do it. Here is the snippit from section 9.3:
>
> typedef Gtk::TreeModel::Children type_children; //minimise code length.
> type_children children = refModel->children();
> for(type_children::iterator iter = children.begin();
>      iter != children.end(); ++iter)
> {
>    Gtk::TreeModel::Row row = *iter;
>    //Do something with the row - see above for set/get.
> }
>
> *I'm also confused by the following comment I found on line; I don't 
> see how this can work with the above code either. ***
> iterator Gtk::TreeStore:erase(const iterator& iter)
>         Returns an iterator to the next row or end() if there is none"
Note that this refers to Gtk:TreeStore, not Gtk::TreeModel.
> I hope you can help me .  Thanks, PCR
>
>
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