It is really bad code, mostly unused and no one stepped up to fix it.
Note that Gtk developers do not object to a ruler widget in priciple,
just to the current implementation. If someone wants to propose a sane
version, please don't hesitate.
https://bugzilla.gnome.org/show_bug.cgi?id=613942
CellAreaScaffold now also reflects how cell_area should be
passed to gtk_cell_area_activate() and gtk_cell_area_event()
and how the background area for gtk_cell_area_renderer() should
be created.
- Added gtk_cell_area_aligned_cell_area() to get the aligned
internal area use by a cell (for focus painting and for
event areas).
- Provide the event area in "editing-started" signal
- Fire "remove-editable" when editing is canceled by the user,
an implementing layouting widget need only catch "editing-started"
and "remove-editable" now.
- CellAreaScaffold/testcellarea now edit textrenderers.
Now GtkCellAreaBox handles the click event to activate renderers
and checks if the area is in a sibling of a focus renderer, possibly
activating the proper focus sibling renderer.
Also GtkCellArea gains a "focus-changed" signal to allow it to
change the currently focused row according to the button events.
Added concept of "Focus Siblings" to GtkCellArea so that some
static text/icon may be included in the focus/click area of
an activatable or editable cell, implemented focus drawing
as well, updated testcellarea to reflect the changes.
- Fixed focus driving in GtkCellArea with refined apis
- Added gtk_cell_area_activate() to be called when the area has focus
(to activate or start editing the focused cell)
- Added support for this in cellareascaffold
- testcellarea now watches the "toggled" signal for a toggle renderer
and updates the model state accordingly, this currently works with
keyboard navigation, however focus is still not painted on cells.
