Consider using a HeaderBar

[982c80311320c1b]

Many GNOME applications moved to Gtk.HeaderBars (https://developer.gnome.org/gtk3/3.10/GtkHeaderBar.html) during the 3.10 cycle.

For consistency and in order to make Simple Scan more compact it'd might make sense to use it, too.

[Eduard Gotwig (gotwig)]

Nearly all GNOME 3.14 applications make us of headerbars.

Simple Scan should get one too.

I am going to start work on this ASAP.

The elementary project uses a version of Simple Scan with a toolbar only.
We can try to apply the diff from 1-2 years ago, to the newer Simple Scan, and from a Toolbar its not a long way to go to a headerbar!

[Eduard Gotwig (gotwig)]

First design, after first day of work.

Outstanding bugs:
Canvas has problems, is moveable with window.
options next to "Scan" don't work yet.
Due to broken Canvas, Crop option is not functional.

[Eduard Gotwig (gotwig)]

With the third commit, we will get fully working headerbars with no functional issues for Simple Scan. For design ideas, please write in the comments. If not, I will propose this for a merge into master after some visual fixes.

Thank you, helpers from #gtk+ on GIMPNet :)

[Robert Ancell (robert-ancell)]

Sorry, for some reason I didn't get a notification on this bug.

Yes, I think simple-scan should use a HeaderBar for Simple Scan but we also need to continue to support the non-headerbar case for systems that aren't currently working well with them (specifically Ubuntu).