Re: [gtk-list] Re: GTK--: Gtk_Notebook::append_page question

[Ionut Borcoman at home <borco mailbox ro>]

Tero Pulkkinen wrote:
> 
> Ionut Borcoman at home <borco@mailbox.ro> writes:
> > I want to add some pages to a notebook. I am using something like this:
> >
> >     frame0.set_usize( 200, 200 );
> >     frame0.border_width( SPACING );
> >     notebook.append_page( &frame0,new Gtk_Label("a page"));
> >     frame0.show();
> >
> > My question is this:
> >
> > Will the memory allocated for the label by dealocated corectly when the
> > notebook or notebook page is deleted ? Will this kind of declaration
> > ("new Gtk_Label("a page")")  produce memory leaks ?
> 
> With all gtk-- containers, including notebooks, the ownership of the
> items inserted to it are NOT transferred to the container. Thus you
> must delete everything yourself what you allocate.

Than my style of appending is not good. :( And I have to keep a lot of
variables, otherwise not needed. The biggest problem is how to name all
this bunch of widgets ! :)

And it means that the piece of code from bellow is also leaving some
memory that cannot be freed, isn't it ?

    Gtk_Label  *label;
    label = new Gtk_Label("xxx");
    table0.attach( label, 0, 1, row, row+1, GTK_FILL, GTK_FILL);
    label->set_alignment( 0.0, 0.5 );
    label->show();
    
    row++;

    // use the same pointer variable for the next widget !!!
    // advantages: only one pointer variable
    // also cut-and-paste of code works easy
    label = new Gtk_Label("yyyyyyyyyyyyyyyyyyy");
    table0.attach( label, 0, 1, row, row+1, GTK_FILL, GTK_FILL);
    label->set_alignment( 0.0, 0.5 );
    label->show();

Any ideea about how to do something similar without memory leaks ?

Ionutz

PS: Thanks for the Gtk_Table::Gtk_Table(gint rows=1, gint columns=1, gint homogeneous=FALSE); The defaults are always usable.