Gtk3

[Geert Janssens]

I'm done with reviewing your work. You'll find mi comments directly on the 
github commits.

In general - well done! This really brings us much closer to a real gtk3 
gnucash.

As far as I'm concerned your branch is ready for merging:
- the tree builds fine
- the build executable seems to work barring a few visual details

So IMO this is ready to be tested by a bigger audience.

Regards,

Geert

On zaterdag 8 juli 2017 15:01:38 CEST Geert Janssens wrote:
> Bob,
> 
> While reading through your changes I note we have lots of places where we
> make some small tweaks to the default gui style. It shows in your commits
> because we have to change from GtkStyle api to
> GtkStyleContext/GtkCssProvider api.
> 
> This got me thinking about a future streamlining we should consider: instead
> of adding code snippets that insert custom CSS, can't we collect all of
> these snippets in one big CSS file we ship with gnucash, to be stored in
> /etc/ gnucash/gnucash.css and which we read at load time ? Much like we now
> load a custom .gtk3.0-gnucash.css file.
> 
> Both can co-exist IMO, with the latter taking precedence over the former.
> The one in etc should be "Application" priority the one in the homedir
> "User" priority.
> 
> This would keep the code cleaner and separate function from presentation.
> Especially your initial work of adding style context to most widgets is a
> big step in the right direction.
> 
> What do you think ?
> 
> Regards,
> 
> Geert