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  • #====================== BEGIN GPL LICENSE BLOCK ======================
    #
    #  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 2
    #  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, write to the Free Software Foundation,
    #  Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
    #
    #======================= END GPL LICENSE BLOCK ========================
    
    # <pep8 compliant>
    
    import bpy
    
    
    
    ORG_LAYER = [n == 31 for n in range(0, 32)]  # Armature layer that original bones should be moved to.
    MCH_LAYER = [n == 30 for n in range(0, 32)]  # Armature layer that mechanism bones should be moved to.
    DEF_LAYER = [n == 29 for n in range(0, 32)]  # Armature layer that deformation bones should be moved to.
    ROOT_LAYER = [n == 28 for n in range(0, 32)]  # Armature layer that root bone should be moved to.
    
    
    
    def get_layers(layers):
        """ Does its best to extract a set of layers from any data thrown at it.
        """
        if type(layers) == int:
            return [x == layers for x in range(0, 32)]
        elif type(layers) == str:
            s = layers.split(",")
            l = []
            for i in s:
                try:
                    l += [int(float(i))]
                except ValueError:
                    pass
            return [x in l for x in range(0, 32)]
        elif type(layers) == tuple or type(layers) == list:
            return [x in layers for x in range(0, 32)]
        else:
            try:
                list(layers)
            except TypeError:
                pass
            else:
                return [x in layers for x in range(0, 32)]
    
    
    #=============================================
    # UI utilities
    #=============================================
    
    class ControlLayersOption:
        def __init__(self, name, toggle_name=None, toggle_default=True, description="Set of control layers"):
            self.name = name
            self.toggle_default = toggle_default
            self.description = description
    
            self.toggle_option = self.name+'_layers_extra'
            self.layers_option = self.name+'_layers'
            self.toggle_name = toggle_name if toggle_name else self.toggle_option
    
        def get(self, params):
            if getattr(params, self.toggle_option):
                return list(getattr(params, self.layers_option))
            else:
                return None
    
        def assign(self, params, bone_set, bone_list):
            layers = self.get(params)
    
    
            if isinstance(bone_set, bpy.types.Object):
                bone_set = bone_set.data.bones
    
    
            if layers:
                for name in bone_list:
                    bone = bone_set[name]
                    if isinstance(bone, bpy.types.PoseBone):
                        bone = bone.bone
    
                    bone.layers = layers
    
        def add_parameters(self, params):
            prop_toggle = bpy.props.BoolProperty(
                name=self.toggle_name,
                default=self.toggle_default,
                description=""
            )
    
            setattr(params, self.toggle_option, prop_toggle)
    
            prop_layers = bpy.props.BoolVectorProperty(
                size=32,
                description=self.description,
                default=tuple([i == 1 for i in range(0, 32)])
            )
    
            setattr(params, self.layers_option, prop_layers)
    
        def parameters_ui(self, layout, params):
            r = layout.row()
            r.prop(params, self.toggle_option)
            r.active = getattr(params, self.toggle_option)
    
            col = r.column(align=True)
            row = col.row(align=True)
    
            bone_layers = bpy.context.active_pose_bone.bone.layers[:]
    
            for i in range(8):    # Layers 0-7
                icon = "NONE"
                if bone_layers[i]:
                    icon = "LAYER_ACTIVE"
                row.prop(params, self.layers_option, index=i, toggle=True, text="", icon=icon)
    
            row = col.row(align=True)
    
            for i in range(16, 24):     # Layers 16-23
                icon = "NONE"
                if bone_layers[i]:
                    icon = "LAYER_ACTIVE"
                row.prop(params, self.layers_option, index=i, toggle=True, text="", icon=icon)
    
            col = r.column(align=True)
            row = col.row(align=True)
    
            for i in range(8, 16):  # Layers 8-15
                icon = "NONE"
                if bone_layers[i]:
                    icon = "LAYER_ACTIVE"
                row.prop(params, self.layers_option, index=i, toggle=True, text="", icon=icon)
    
            row = col.row(align=True)
    
            for i in range(24, 32):     # Layers 24-31
                icon = "NONE"
                if bone_layers[i]:
                    icon = "LAYER_ACTIVE"
                row.prop(params, self.layers_option, index=i, toggle=True, text="", icon=icon)
    
    
    ControlLayersOption.FK = ControlLayersOption('fk', description="Layers for the FK controls to be on")
    ControlLayersOption.TWEAK = ControlLayersOption('tweak', description="Layers for the tweak controls to be on")