191 lines
7.3 KiB
Python
191 lines
7.3 KiB
Python
#!/usr/bin/env python3
|
|
#
|
|
# This program is free software: you can redistribute it and/or modify
|
|
# it under the terms of the GNU General Public License as published by
|
|
# the Free Software Foundation; either version 3 of the License, or
|
|
# (at your option) any later version.
|
|
#
|
|
# This program is distributed in the hope that it will be useful,
|
|
# but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
# GNU General Public License for more details.
|
|
#
|
|
# You should have received a copy of the GNU General Public License
|
|
# along with this program. If not, see <https://www.gnu.org/licenses/>.
|
|
|
|
import gi
|
|
gi.require_version('Pika', '3.0')
|
|
from gi.repository import Pika
|
|
gi.require_version('PikaUi', '3.0')
|
|
from gi.repository import PikaUi
|
|
from gi.repository import GObject
|
|
from gi.repository import GLib
|
|
from gi.repository import Gio
|
|
gi.require_version('Gtk', '3.0')
|
|
from gi.repository import Gtk
|
|
import sys
|
|
|
|
def N_(message): return message
|
|
def _(message): return GLib.dgettext(None, message)
|
|
|
|
|
|
def make_gradient(palette, num_segments, num_colors):
|
|
|
|
# name the gradient same as the source palette
|
|
# For now, the name of a resource is the same as the ID
|
|
palette_name = palette.get_name()
|
|
gradient = Pika.Gradient.new(palette_name)
|
|
# assert gradient is valid but is has only one segment
|
|
assert gradient.get_number_of_segments() == 1
|
|
|
|
# split one segment into desired count
|
|
# index is zero-based
|
|
gradient.segment_range_split_uniform( 0, 0, num_segments)
|
|
|
|
for color_number in range(0,num_segments):
|
|
if color_number == num_colors - 1:
|
|
color_number_next = 0
|
|
else:
|
|
color_number_next = color_number + 1
|
|
_, color_left = palette.entry_get_color(color_number)
|
|
_, color_right = palette.entry_get_color(color_number_next)
|
|
gradient.segment_set_left_color( color_number, color_left, 100.0)
|
|
gradient.segment_set_right_color(color_number, color_right, 100.0)
|
|
|
|
# Side effects on the context. Probably not what most would expect.
|
|
Pika.context_set_gradient(gradient)
|
|
return gradient
|
|
|
|
def run(procedure, config, data):
|
|
# Get the parameters
|
|
run_mode = config.get_property("run-mode")
|
|
|
|
if run_mode == Pika.RunMode.INTERACTIVE:
|
|
PikaUi.init(procedure.get_name())
|
|
dialog = PikaUi.ProcedureDialog(procedure=procedure, config=config)
|
|
|
|
# Add palette button
|
|
dialog.fill (["palette"])
|
|
|
|
if not dialog.run():
|
|
dialog.destroy()
|
|
return procedure.new_return_values(Pika.PDBStatusType.CANCEL, GLib.Error())
|
|
|
|
dialog.destroy()
|
|
|
|
palette = config.get_property("palette")
|
|
if palette is None or not palette.is_valid():
|
|
if palette is not None:
|
|
sys.stderr.write(f'Invalid palette id: {palette.get_id()}\n')
|
|
sys.stderr.write('This should not happen. Please report to PIKA project.\n')
|
|
sys.stderr.write('Falling back to context palette instead.\n')
|
|
palette = Pika.context_get_palette()
|
|
config.set_property("palette", palette)
|
|
|
|
num_colors = palette.get_color_count()
|
|
|
|
if procedure.get_name() == 'python-fu-palette-to-gradient':
|
|
num_segments = num_colors - 1
|
|
else: # 'python-fu-palette-to-gradient-repeating'
|
|
num_segments = num_colors
|
|
gradient = make_gradient(palette, num_segments, num_colors)
|
|
|
|
# XXX: for the error parameter, we want to return None.
|
|
# Unfortunately even though the argument is (nullable), pygobject
|
|
# looks like it may have a bug. So workaround is to just set a
|
|
# generic GLib.Error() since anyway the error won't be process with
|
|
# PIKA_PDB_SUCCESS status.
|
|
# See pygobject#351
|
|
retval = procedure.new_return_values(Pika.PDBStatusType.SUCCESS, GLib.Error())
|
|
|
|
# XXX: I don't try to get the GValue with retval.index(1) because it
|
|
# actually return a string (cf. pygobject#353). Just create a new
|
|
# GValue and replace the default one with this one.
|
|
# This comment dates from when resources are strings:
|
|
# value = GObject.Value(GObject.TYPE_STRING, gradient)
|
|
|
|
value = GObject.Value(Pika.Gradient, gradient)
|
|
retval.remove(1)
|
|
retval.insert(1, value)
|
|
|
|
return retval
|
|
|
|
class PaletteToGradient (Pika.PlugIn):
|
|
## Parameter: run mode ##
|
|
@GObject.Property(type=Pika.RunMode,
|
|
default=Pika.RunMode.NONINTERACTIVE,
|
|
nick="Run mode", blurb="The run mode")
|
|
def run_mode(self):
|
|
'''The run mode (unused)'''
|
|
return self.runmode
|
|
|
|
@run_mode.setter
|
|
def run_mode(self, runmode):
|
|
self.runmode = runmode
|
|
|
|
## Parameter: palette ##
|
|
@GObject.Property(type=Pika.Palette,
|
|
default=None,
|
|
nick= _("_Palette"))
|
|
def palette(self):
|
|
'''Palette or None for the currently selected palette'''
|
|
return self.palette
|
|
|
|
@palette.setter
|
|
def palette(self, palette):
|
|
self.palette = palette
|
|
|
|
## Properties: return values ##
|
|
@GObject.Property(type=Pika.Gradient,
|
|
default="",
|
|
nick=_("The newly created gradient"),
|
|
blurb=_("The newly created gradient"))
|
|
def new_gradient(self):
|
|
"""Read-write integer property."""
|
|
return self.new_gradient
|
|
|
|
@new_gradient.setter
|
|
def new_gradient(self, new_gradient):
|
|
self.new_gradient = new_gradient
|
|
|
|
## PikaPlugIn virtual methods ##
|
|
def do_set_i18n(self, procname):
|
|
return True, 'pika30-python', None
|
|
|
|
def do_query_procedures(self):
|
|
return ['python-fu-palette-to-gradient',
|
|
'python-fu-palette-to-gradient-repeating']
|
|
|
|
def do_create_procedure(self, name):
|
|
procedure = Pika.Procedure.new(self, name,
|
|
Pika.PDBProcType.PLUGIN,
|
|
run, None)
|
|
if name == 'python-fu-palette-to-gradient':
|
|
procedure.set_menu_label(_("Palette to _Gradient"))
|
|
procedure.set_documentation(_("Create a gradient using colors from the palette"),
|
|
_("Create a new gradient using colors from the palette."),
|
|
"")
|
|
elif name == 'python-fu-palette-to-gradient-repeating':
|
|
procedure.set_menu_label(_("Palette to _Repeating Gradient"))
|
|
procedure.set_documentation(_("Create a repeating gradient using colors from the palette"),
|
|
_("Create a new repeating gradient using colors from the palette."),
|
|
"")
|
|
else:
|
|
procedure = None
|
|
|
|
if procedure is not None:
|
|
procedure.set_attribution("Carol Spears, reproduced from previous work by Adrian Likins and Jeff Trefftz",
|
|
"Carol Spears", "2006")
|
|
# We don't build a GParamSpec ourselves because passing it
|
|
# around is apparently broken in Python. Hence this trick.
|
|
# See pygobject#227
|
|
procedure.add_argument_from_property(self, "run-mode")
|
|
procedure.add_argument_from_property(self, "palette")
|
|
procedure.add_return_value_from_property(self, "new-gradient")
|
|
|
|
procedure.add_menu_path ('<Palettes>')
|
|
|
|
return procedure
|
|
|
|
Pika.main(PaletteToGradient.__gtype__, sys.argv)
|
