I admit that the contact preview needs some work, there is some tasty code in Contacts I need to refactor.

So, what is happening here? The tree view is a HitoContactView, which subclasses GtkTreeView. This displays the contents of a HitoContactStore, a subclass of GtkListStore which holds the EContacts from an EBookView. In between the store and the view is a HitoContactFilterModel, which can filter both on groups (currently the most useful implementation is HitoCategoryGroup, which groups on the CATEGORY vCard field) and text, which does decomposed matches against the contact's name.

The combo box is a HitoGroupCombo, which controls the group being filtered. The entry is the only widget which isn't a subclass (yet), and controls the text being filtered. The final bit of magic is HitoGroupStore, which collects categories from contacts and creates HitoCategoryGroups as required (this is used as the model for the combo).

Now for the hard work of writing a usable preview widget, and the nightmare of a decent contact editor...

NP: Live At the Union Chapel, Damien Rice

• Correctly read the album artist (#393707)
• Don't set empty track titles (#435964)
• Fix a11y on the play/pause button (#364371, Patrick Wade)