PpPpdOptionWidget and PpIppOptionWidget both use combo boxes for
certain types of selections. With GTK4, combo boxes no longer
support scrolling[0], which in turn causes problems setting some
things in the PpOptionsDialog[1].
This replaces instances of GtkComboBox with GtkDropDown which do
support scrolling. This change was applied to both PpIppOptionWidget
and PpPpdOptionWidget as both are used in PpOptions dialog.
Since the configuration values passed to CUPS can no longer be stored
in a GtkTreeModel alongside the displayed values, some logic changes
to update_widget_real in PpPpdOptionWidget to maintain the reference
to the ppd_option_t so the selected index can be mapped to the
configuration value.
[0] - https://gitlab.gnome.org/GNOME/gtk/-/issues/3674
[1] - https://gitlab.gnome.org/GNOME/gnome-control-center/-/issues/1704
Fortunately for us GtkTreeView still operates pretty
much exactly like in GTK3. Other than that, it's a
dense junction of all that we've done so far to port
other panels.
Use GCancellable when setting a new value of an option.
This prevents Printers panel from crash caused by
calling of option widget's callback on finalized widget.
https://bugzilla.gnome.org/show_bug.cgi?id=694874
Add Options dialog which allows users to set more options than current dialog.
The dialog reads printer's PPD file and add its options to the dialog together
with some preselected IPP options (#678637).
All operations in the dialog are asynchronous.
During implementation of this, the option for setting allowed users was removed
because this is not suitable for this panel (the option is intended for
administrators).