Remove a boatload of "or %NULL" from nullable parameters
and return values. gi-docgen generates suitable text from
the annotation that we don't need to duplicate.
This adds a few missing nullable annotations too.
Change the apis in GtkListView, GtkColumnView and
GtkGridView to be explicitly about GtkSelectionModel,
to make it obvious that the widgets handle selection.
Update all users.
We trigger the paper dialog when the "manage" item
in the dropdown is selected. But the selection also
changes due to internal changes, such as reloading
the custom paper list when the paper dialog is
closed. We need to be extra careful to avoid triggering
another paper dialog when that happens.
Simplify all view model APIs and always return G_TYPE_OBJECT as the
item-type for every model.
It turns out nobody uses item-type anyway.
So instead of adding lots of APIs, forcing people to think about it and
trying to figure out how to handle filter or map models that modify item
types, just having an easy life is a better approach.
All the models need to be able to deal with any type of object going
through anyway.
Replace it with an explicit nested main loop, as we need to block the
signal handler currently being emitted depending on the response of the
overwrite confirmation dialog.
This is a bit of a hack, and the only reason we need it is that the
print dialog will load the last used path as the output file name, when
printing to a file; this means that, in theory, it would be possible to
press Print without selecting a file, and accidentally overwriting an
existing file.
It would be much simpler if we did not store the last used path, and
always explicitly asked the user to select a file; this would avoid
destructive actions, and would allow us to rely on the overwrite
confirmation dialog right inside the file chooser.
The reason for this is simply that I want to get hash functions that
have their values close together, so they can fit in a smaller range
(the goal here is 12 bits). By using GQuark, we get consecutive numbers
starting with 1 (and applications have <1000 quarks usually), whereas
interned strings can be all over the place.
As a side effect we also save 64 bytes per declaration.
Page ranges entry can now be focused directly, and will automatically
select the page ranges button when doing so.
This avoids the sometimes counter-intuitive previous behavior where the
entry was automatically focused when toggling the radio button, but the
user may still find themselves clicking uselessly in the text entry
because they scheduled it in their mental model.
