An alternative would be to add this in a new
gtkmm-documentation/examples/book/custom/custom_treemodel directory in
the gtkmm tutorial. And a description in a new section in the /Custom
Widgets/ chapter (which should then be renamed).
Isn't this kind of custom class that implements one or more interfaces
quite unusual? And a bit more complicated than most of the demos? There
is no corresponding program in gtk/demos. All existing C++ demos in
gtkmm correspond to C demos in gtk.
Kjell
On 2019-12-22 11:06, danny via gtkmm-list wrote:
hello gtkmm,
so how do I continue with this? I feel that it would be really handy
to add an example such as the one below to the gtkmm demos subdir.
I was struggling with this myself some years ago for a gtk2 program
where the data were already established (and constantly changing)
outside the gui in a separate structure.
Copying the data into the treeview model, as the existing demo
programs do, is obviously not the ideal solution.
the other example in gtkmm-documentation
<https://gitlab.gnome.org/GNOME/gtkmm-documentation/tree/gtkmm-3-24/examples/others/treemodelcustom>
keeps is very helpful, but it does not show subdirs...
regards, Danny.
On Mon, Dec 16, 2019 at 2:10 PM danny via gtkmm-list
<gtkmm-list@gnome.org <mailto:gtkmm-list@gnome.org>> wrote:
hi
well, actually, I did not find the example you are referring to. I
probably did when I was working with the original gtk2 program, though.
so I have come up with this:
(gtkmm-3.22.3/demos)
--------------------------------------------------------------
/* Tree View/Tree Store
*
* The GtkTreeStore is used to store data in tree form, to be
* used later on by a GtkTreeView to display it. This demo builds
* a simple list of nodes in memory and displays it in the GtkTreeStore.
*
*/
...
--------------------------------------------------------------
I'm not sure, though, if I really understand the purpose of
virtual bool Gtk::TreeModel::iter_parent_vfunc (
this function finds a parent for the given child, right? but why
would that be needed, if a child can only be arrived at from a parent
node in the first place?
regards, Danny.
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