Since meson 0.43.0 (below our current requirement), 'symbol_prefix'
argument of gnome.generate_gir() allows an ordered list. If I prepend
'gimp_ui', it makes any gimp_ui_*() function to not start with 'ui_'.
In particular, GimpUi.ui_init() becomes GimpUi.init() which is much less
redundant.
Plug-ins that work from different bindings probably want to use their
own list-type to specify arguments, rather than working with a more
cumbersome `GimpValueArray`.
This new API should make it less verbose. For example:
```
args = Gimp.ValueArray.new(5)
args.insert(0, GObject.Value(Gimp.RunMode, Gimp.RunMode.NONINTERACTIVE))
args.insert(1, GObject.Value(Gimp.Image, image))
args.insert(2, GObject.Value(Gimp.Drawable, mask))
args.insert(3, GObject.Value(GObject.TYPE_INT, int(time.time())))
args.insert(4, GObject.Value(GObject.TYPE_DOUBLE, turbulence))
Gimp.get_pdb().run_procedure('plug-in-plasma', args)
```
becomes
```
Gimp.get_pdb().run_procedure('plug-in-plasma', [
GObject.Value(Gimp.RunMode, Gimp.RunMode.NONINTERACTIVE),
GObject.Value(Gimp.Image, image),
GObject.Value(Gimp.Drawable, mask),
GObject.Value(GObject.TYPE_INT, int(time.time())),
GObject.Value(GObject.TYPE_DOUBLE, turbulence),
])
```
Reduce number of undo steps created by Spryrogimp previews.
First, by grouping them into a single undo.
The implementation adds a function for clearing the
incremental preview drawing that is being executed as an idle task,
and closing an undo group in case the preview left it open (which
would usually be the case). A second way to reduce undos is
by generating a new preview only upon mouse button release of
scales in the UI, and not while dragging the scale.
Add visual tab to spyrogimp plugin for a more intuitive, visual
way of specifying the spyrograph pattern.
In addition, fix using the selection as the fixed gear, and add
option to save the pattern to a path.
paste as brush, paste as pattern, select to new brush, select to new pattern
fill selection outline, fill path, stroke selection, distort, rounded rectangle
indexed color conversion, merge visible layers, new guide, new guide (by percent)
image properties, newsprint, fractal explorer, sample colorize, new layer
metadata editor (just a button), spyroplus (only common buttons)
It is a nearly full port. Some things would still need to be updated
(like deprecated use of GtkTable or gtk_range_set_update_policy()
removed), and other stuff need to be taken care of in GIMP API first.
But the core of the feature is there.
