Re: Glib::RefPtr

[Phil Wolff <adiabat centurylink net>]

My T_item is:

class CObject : public Glib::Object
{
public:
    static Glib::RefPtr<CObject > create ( const Glib::ustring& );
    virtual         ~CObject ();
    ...
protected:
    explicit        CObject ( const Glib::ustring& );
private:
    ...
    Gtk::Frame*     m_pFrame;
    ...
};

The string argument is the name of the photo file, and the Frame 
contains the display built from the information in the photo file.

Creating the model:.

    m_refSpecificModel = Gio::ListStore<CObject >::create ( filename );

Binding:

    m_refCurrentModel = m_refSpecificModel;
    m_pFlowBox->bind_list_store ( m_refCurrentModel, ... );

All m_* variables are members of the executing class and therefore do 
not go out of scope. I don't see why m_refSpecificModel's reference 
count should go to 0.

When I try to re-bind the model, the CObject instances are still present 
in m_refSpecificModel and the value of each m_pFrame is unchanged, but 
m_pFrame->gobj () returns 0.

On 10/08/2017 06:50 AM, Daniel Boles wrote:
> If you want to keep the models around, then you should keep a RefPtr 
> to them around, so that you hold an extra reference to stop them being 
> destroyed.
>
> FlowBox should only destroy the binding, not the model itself; if the 
> latter occurs, it must be a result of you not having kept a reference 
> to the model to keep it alive.
>
> Or did I misunderstand?
>
>
>
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