ui.py

#====================== 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
from bpy.props import StringProperty
from mathutils import Color

from .utils import get_rig_type, MetarigError
from .utils import write_metarig, write_widget
from .utils import unique_name
from .utils import upgradeMetarigTypes, outdated_types
from . import rig_lists
from . import generate


class DATA_PT_rigify_buttons(bpy.types.Panel):
    bl_label = "Rigify Buttons"
    bl_space_type = 'PROPERTIES'
    bl_region_type = 'WINDOW'
    bl_context = "data"

    @classmethod
    def poll(cls, context):
        return context.object.type == 'ARMATURE'

    def draw(self, context):
        C = context
        layout = self.layout
        obj = context.object
        id_store = C.window_manager

        if obj.mode in {'POSE', 'OBJECT'}:

            WARNING = "Warning: Some features may change after generation"
            show_warning = False
            show_update_metarig = False

            check_props = ['IK_follow', 'root/parent', 'FK_limb_follow', 'IK_Stretch']

            for obj in bpy.data.objects:
                if type(obj.data) != bpy.types.Armature:
                    continue
                for bone in obj.pose.bones:
                    if bone.bone.layers[30] and (list(set(bone.keys()) & set(check_props))):
                        show_warning = True
                        break
                for b in obj.pose.bones:
                    if b.rigify_type in outdated_types.keys():
                        show_update_metarig = True
                        break

            if show_warning:
                layout.label(text=WARNING, icon='ERROR')

            layout.operator("pose.rigify_generate", text="Generate Rig")
            layout.prop(id_store, "rigify_advanced_generation")

            if id_store.rigify_advanced_generation:

                main_row = layout.row(align=True).split(percentage=0.3)
                col1 = main_row.column()
                col2 = main_row.column()
                col1.label(text="Target Rig")
                col1.label(text="Target UI")

                row = col2.row(align=True)

                for i in range(0, len(id_store.rigify_target_rigs)):
                    id_store.rigify_target_rigs.remove(0)

                for ob in context.scene.objects:
                    if type(ob.data) == bpy.types.Armature and "rig_id" in ob.data:
                        id_store.rigify_target_rigs.add()
                        id_store.rigify_target_rigs[-1].name = ob.name

                row.prop_search(id_store, "rigify_target_rig", id_store, "rigify_target_rigs", text="",
                                icon='OUTLINER_OB_ARMATURE')

                for i in range(0, len(id_store.rigify_rig_uis)):
                    id_store.rigify_rig_uis.remove(0)

                for t in bpy.data.texts:
                    id_store.rigify_rig_uis.add()
                    id_store.rigify_rig_uis[-1].name = t.name

                row = col2.row()
                row.prop_search(id_store, "rigify_rig_ui", id_store, "rigify_rig_uis", text="", icon='TEXT')

                layout.prop(id_store, "rigify_force_widget_update")

            if show_update_metarig:
                layout.label(text="Some bones have old legacy rigify_type. Click to upgrade", icon='ERROR')
                layout.operator("pose.rigify_upgrade_types", text="Upgrade Metarig")


        elif obj.mode == 'EDIT':
            # Build types list
            collection_name = str(id_store.rigify_collection).replace(" ", "")

            for i in range(0, len(id_store.rigify_types)):
                id_store.rigify_types.remove(0)

            for r in rig_lists.rig_list:

                if collection_name == "All":
                    a = id_store.rigify_types.add()
                    a.name = r
                elif r.startswith(collection_name + '.'):
                    a = id_store.rigify_types.add()
                    a.name = r
                elif (collection_name == "None") and ("." not in r):
                    a = id_store.rigify_types.add()
                    a.name = r

            # Rig type list
            row = layout.row()
            row.template_list("UI_UL_list", "rigify_types", id_store, "rigify_types", id_store, 'rigify_active_type')

            props = layout.operator("armature.metarig_sample_add", text="Add sample")
            props.metarig_type = id_store.rigify_types[id_store.rigify_active_type].name


class DATA_PT_rigify_layer_names(bpy.types.Panel):
    bl_label = "Rigify Layer Names"
    bl_space_type = 'PROPERTIES'
    bl_region_type = 'WINDOW'
    bl_context = "data"
    bl_options = {'DEFAULT_CLOSED'}

    @classmethod
    def poll(cls, context):
        return context.object.type == 'ARMATURE'

    def draw(self, context):
        layout = self.layout
        obj = context.object
        arm = obj.data

        # Ensure that the layers exist
        if 0:
            for i in range(1 + len(arm.rigify_layers), 29):
                arm.rigify_layers.add()
        else:
            # Can't add while drawing, just use button
            if len(arm.rigify_layers) < 29:
                layout.operator("pose.rigify_layer_init")
                return

        # UI
        main_row = layout.row(align=True).split(0.05)
        col1 = main_row.column()
        col2 = main_row.column()
        col1.label()
        for i in range(32):
            if i == 16 or i == 29:
                col1.label()
            col1.label(str(i+1) + '.')

        for i, rigify_layer in enumerate(arm.rigify_layers):
            # note: rigify_layer == arm.rigify_layers[i]
            if (i % 16) == 0:
                col = col2.column()
                if i == 0:
                    col.label(text="Top Row:")
                else:
                    col.label(text="Bottom Row:")
            if (i % 8) == 0:
                col = col2.column()
            if i != 28:
                row = col.row(align=True)
                icon = 'RESTRICT_VIEW_OFF' if arm.layers[i] else 'RESTRICT_VIEW_ON'
                row.prop(arm, "layers", index=i, text="", toggle=True, icon=icon)
                #row.prop(arm, "layers", index=i, text="Layer %d" % (i + 1), toggle=True, icon=icon)
                row.prop(rigify_layer, "name", text="")
                row.prop(rigify_layer, "row", text="UI Row")
                icon = 'RADIOBUT_ON' if rigify_layer.set else 'RADIOBUT_OFF'
                row.prop(rigify_layer, "set", text="", toggle=True, icon=icon)
                row.prop(rigify_layer, "group", text="Bone Group")
            else:
                row = col.row(align=True)

                icon = 'RESTRICT_VIEW_OFF' if arm.layers[i] else 'RESTRICT_VIEW_ON'
                row.prop(arm, "layers", index=i, text="", toggle=True, icon=icon)
                # row.prop(arm, "layers", index=i, text="Layer %d" % (i + 1), toggle=True, icon=icon)
                row1 = row.split(align=True).row(align=True)
                row1.prop(rigify_layer, "name", text="")
                row1.prop(rigify_layer, "row", text="UI Row")
                row1.enabled = False
                icon = 'RADIOBUT_ON' if rigify_layer.set else 'RADIOBUT_OFF'
                row.prop(rigify_layer, "set", text="", toggle=True, icon=icon)
                row.prop(rigify_layer, "group", text="Bone Group")
            if rigify_layer.group == 0:
                row.label(text='None')
            else:
                row.label(text=arm.rigify_colors[rigify_layer.group-1].name)

        col = col2.column()
        col.label(text="Reserved:")
        # reserved_names = {28: 'Root', 29: 'DEF', 30: 'MCH', 31: 'ORG'}
        reserved_names = {29: 'DEF', 30: 'MCH', 31: 'ORG'}
        # for i in range(28, 32):
        for i in range(29, 32):
            row = col.row(align=True)
            icon = 'RESTRICT_VIEW_OFF' if arm.layers[i] else 'RESTRICT_VIEW_ON'
            row.prop(arm, "layers", index=i, text="", toggle=True, icon=icon)
            row.label(text=reserved_names[i])


class DATA_OT_rigify_add_bone_groups(bpy.types.Operator):
    bl_idname = "armature.rigify_add_bone_groups"
    bl_label = "Rigify Add Standard Bone Groups"

    @classmethod
    def poll(cls, context):
        return context.object.type == 'ARMATURE'

    def execute(self, context):
        obj = context.object
        armature = obj.data
        if not hasattr(armature, 'rigify_colors'):
            return {'FINISHED'}

        groups = ['Root', 'IK', 'Special', 'Tweak', 'FK', 'Extra']

        for g in groups:
            if g in armature.rigify_colors.keys():
                continue

            armature.rigify_colors.add()
            armature.rigify_colors[-1].name = g

            armature.rigify_colors[g].select = Color((0.3140000104904175, 0.7839999794960022, 1.0))
            armature.rigify_colors[g].active = Color((0.5490000247955322, 1.0, 1.0))
            armature.rigify_colors[g].standard_colors_lock = True

            if g == "Root":
                armature.rigify_colors[g].normal = Color((0.43529415130615234, 0.18431372940540314, 0.41568630933761597))
            if g == "IK":
                armature.rigify_colors[g].normal = Color((0.6039215922355652, 0.0, 0.0))
            if g== "Special":
                armature.rigify_colors[g].normal = Color((0.9568628072738647, 0.7882353663444519, 0.0470588281750679))
            if g== "Tweak":
                armature.rigify_colors[g].normal = Color((0.03921568766236305, 0.21176472306251526, 0.5803921818733215))
            if g== "FK":
                armature.rigify_colors[g].normal = Color((0.11764706671237946, 0.5686274766921997, 0.03529411926865578))
            if g== "Extra":
                armature.rigify_colors[g].normal = Color((0.9686275124549866, 0.250980406999588, 0.0941176563501358))

        return {'FINISHED'}


class DATA_OT_rigify_use_standard_colors(bpy.types.Operator):
    bl_idname = "armature.rigify_use_standard_colors"
    bl_label = "Rigify Get active/select colors from current theme"

    @classmethod
    def poll(cls, context):
        return context.object.type == 'ARMATURE'

    def execute(self, context):
        obj = context.object
        armature = obj.data
        if not hasattr(armature, 'rigify_colors'):
            return {'FINISHED'}

        current_theme = bpy.context.user_preferences.themes.items()[0][0]
        theme = bpy.context.user_preferences.themes[current_theme]

        armature.rigify_selection_colors.select = theme.view_3d.bone_pose
        armature.rigify_selection_colors.active = theme.view_3d.bone_pose_active

        # for col in armature.rigify_colors:
        #     col.select = theme.view_3d.bone_pose
        #     col.active = theme.view_3d.bone_pose_active

        return {'FINISHED'}


class DATA_OT_rigify_apply_selection_colors(bpy.types.Operator):
    bl_idname = "armature.rigify_apply_selection_colors"
    bl_label = "Rigify Apply user defined active/select colors"

    @classmethod
    def poll(cls, context):
        return context.object.type == 'ARMATURE'

    def execute(self, context):
        obj = context.object
        armature = obj.data
        if not hasattr(armature, 'rigify_colors'):
            return {'FINISHED'}

        #current_theme = bpy.context.user_preferences.themes.items()[0][0]
        #theme = bpy.context.user_preferences.themes[current_theme]

        for col in armature.rigify_colors:
            col.select = armature.rigify_selection_colors.select
            col.active = armature.rigify_selection_colors.active

        return {'FINISHED'}


class DATA_OT_rigify_bone_group_add(bpy.types.Operator):
    bl_idname = "armature.rigify_bone_group_add"
    bl_label = "Rigify Add Bone Group color set"

    @classmethod
    def poll(cls, context):
        return context.object.type == 'ARMATURE'

    def execute(self, context):
        obj = context.object
        armature = obj.data

        if hasattr(armature, 'rigify_colors'):
            armature.rigify_colors.add()
            armature.rigify_colors[-1].name = unique_name(armature.rigify_colors, 'Group')

            current_theme = bpy.context.user_preferences.themes.items()[0][0]
            theme = bpy.context.user_preferences.themes[current_theme]

            armature.rigify_colors[-1].normal = theme.view_3d.wire
            armature.rigify_colors[-1].normal.hsv = theme.view_3d.wire.hsv
            armature.rigify_colors[-1].select = theme.view_3d.bone_pose
            armature.rigify_colors[-1].select.hsv = theme.view_3d.bone_pose.hsv
            armature.rigify_colors[-1].active = theme.view_3d.bone_pose_active
            armature.rigify_colors[-1].active.hsv = theme.view_3d.bone_pose_active.hsv

        return {'FINISHED'}


class DATA_OT_rigify_bone_group_add_theme(bpy.types.Operator):
    bl_idname = "armature.rigify_bone_group_add_theme"
    bl_label = "Rigify Add Bone Group color set from Theme"
    bl_options = {"REGISTER", "UNDO"}

    theme = bpy.props.EnumProperty(items=(('THEME01', 'THEME01', ''),
                                          ('THEME02', 'THEME02', ''),
                                          ('THEME03', 'THEME03', ''),
                                          ('THEME04', 'THEME04', ''),
                                          ('THEME05', 'THEME05', ''),
                                          ('THEME06', 'THEME06', ''),
                                          ('THEME07', 'THEME07', ''),
                                          ('THEME08', 'THEME08', ''),
                                          ('THEME09', 'THEME09', ''),
                                          ('THEME10', 'THEME10', ''),
                                          ('THEME11', 'THEME11', ''),
                                          ('THEME12', 'THEME12', ''),
                                          ('THEME13', 'THEME13', ''),
                                          ('THEME14', 'THEME14', ''),
                                          ('THEME15', 'THEME15', ''),
                                          ('THEME16', 'THEME16', ''),
                                          ('THEME17', 'THEME17', ''),
                                          ('THEME18', 'THEME18', ''),
                                          ('THEME19', 'THEME19', ''),
                                          ('THEME20', 'THEME20', '')
                                          ),
                                   name='Theme')

    @classmethod
    def poll(cls, context):
        return context.object.type == 'ARMATURE'

    def execute(self, context):
        obj = context.object
        armature = obj.data

        if hasattr(armature, 'rigify_colors'):

            if self.theme in armature.rigify_colors.keys():
                return {'FINISHED'}
            armature.rigify_colors.add()
            armature.rigify_colors[-1].name = self.theme

            id = int(self.theme[-2:]) - 1

            theme_color_set = bpy.context.user_preferences.themes[0].bone_color_sets[id]

            armature.rigify_colors[-1].normal = theme_color_set.normal
            armature.rigify_colors[-1].select = theme_color_set.select
            armature.rigify_colors[-1].active = theme_color_set.active

        return {'FINISHED'}


class DATA_OT_rigify_bone_group_remove(bpy.types.Operator):
    bl_idname = "armature.rigify_bone_group_remove"
    bl_label = "Rigify Remove Bone Group color set"

    idx = bpy.props.IntProperty()

    @classmethod
    def poll(cls, context):
        return context.object.type == 'ARMATURE'

    def execute(self, context):
        obj = context.object
        obj.data.rigify_colors.remove(self.idx)

        # set layers references to 0
        for l in obj.data.rigify_layers:
            if l.group == self.idx + 1:
                l.group = 0
            elif l.group > self.idx + 1:
                l.group -= 1

        return {'FINISHED'}


class DATA_OT_rigify_bone_group_remove_all(bpy.types.Operator):
    bl_idname = "armature.rigify_bone_group_remove_all"
    bl_label = "Rigify Remove All Bone Groups"

    @classmethod
    def poll(cls, context):
        return context.object.type == 'ARMATURE'

    def execute(self, context):
        obj = context.object

        for i, col in enumerate(obj.data.rigify_colors):
            obj.data.rigify_colors.remove(0)
            # set layers references to 0
            for l in obj.data.rigify_layers:
                if l.group == i + 1:
                    l.group = 0

        return {'FINISHED'}


class DATA_UL_rigify_bone_groups(bpy.types.UIList):
    def draw_item(self, context, layout, data, item, icon, active_data, active_propname, index):
        row = layout.row(align=True)
        row = row.split(percentage=0.1)
        row.label(text=str(index+1))
        row = row.split(percentage=0.7)
        row.prop(item, "name", text='', emboss=False)
        row = row.row(align=True)
        icon = 'LOCKED' if item.standard_colors_lock else 'UNLOCKED'
        #row.prop(item, "standard_colors_lock", text='', icon=icon)
        row.prop(item, "normal", text='')
        row2 = row.row(align=True)
        row2.prop(item, "select", text='')
        row2.prop(item, "active", text='')
        #row2.enabled = not item.standard_colors_lock
        row2.enabled = not bpy.context.object.data.rigify_colors_lock


class DATA_PT_rigify_bone_groups_specials(bpy.types.Menu):
    bl_label = 'Rigify Bone Groups Specials'

    def draw(self, context):
        layout = self.layout

        layout.operator('armature.rigify_bone_group_remove_all')


class DATA_PT_rigify_bone_groups(bpy.types.Panel):
    bl_label = "Rigify Bone Groups"
    bl_space_type = 'PROPERTIES'
    bl_region_type = 'WINDOW'
    bl_context = "data"
    bl_options = {'DEFAULT_CLOSED'}

    @classmethod
    def poll(cls, context):
        return context.object.type == 'ARMATURE'

    def draw(self, context):
        obj = context.object
        armature = obj.data
        color_sets = obj.data.rigify_colors
        idx = obj.data.rigify_colors_index

        layout = self.layout
        row = layout.row()
        row.operator("armature.rigify_use_standard_colors", icon='FILE_REFRESH', text='')
        row = row.row(align=True)
        row.prop(armature.rigify_selection_colors, 'select', text='')
        row.prop(armature.rigify_selection_colors, 'active', text='')
        row = layout.row(align=True)
        icon = 'LOCKED' if armature.rigify_colors_lock else 'UNLOCKED'
        row.prop(armature, 'rigify_colors_lock', text = 'Unified select/active colors', icon=icon)
        row.operator("armature.rigify_apply_selection_colors", icon='FILE_REFRESH', text='Apply')
        row = layout.row()
        row.template_list("DATA_UL_rigify_bone_groups", "", obj.data, "rigify_colors", obj.data, "rigify_colors_index")

        col = row.column(align=True)
        col.operator("armature.rigify_bone_group_add", icon='ZOOMIN', text="")
        col.operator("armature.rigify_bone_group_remove", icon='ZOOMOUT', text="").idx = obj.data.rigify_colors_index
        col.menu("DATA_PT_rigify_bone_groups_specials", icon='DOWNARROW_HLT', text="")
        row = layout.row()
        row.prop(armature, 'rigify_theme_to_add', text = 'Theme')
        op = row.operator("armature.rigify_bone_group_add_theme", text="Add From Theme")
        op.theme = armature.rigify_theme_to_add
        row = layout.row()
        row.operator("armature.rigify_add_bone_groups", text="Add Standard")


class BONE_PT_rigify_buttons(bpy.types.Panel):
    bl_label = "Rigify Type"
    bl_space_type = 'PROPERTIES'
    bl_region_type = 'WINDOW'
    bl_context = "bone"
    #bl_options = {'DEFAULT_OPEN'}

    @classmethod
    def poll(cls, context):
        if not context.armature or not context.active_pose_bone:
            return False
        obj = context.object
        if obj:
            return obj.mode == 'POSE'
        return False

    def draw(self, context):
        C = context
        id_store = C.window_manager
        bone = context.active_pose_bone
        collection_name = str(id_store.rigify_collection).replace(" ", "")
        rig_name = str(context.active_pose_bone.rigify_type).replace(" ", "")

        layout = self.layout

        # Build types list
        for i in range(0, len(id_store.rigify_types)):
            id_store.rigify_types.remove(0)

        for r in rig_lists.rig_list:
            rig = get_rig_type(r)
            if hasattr(rig, 'IMPLEMENTATION') and rig.IMPLEMENTATION:
                continue
            # collection = r.split('.')[0]  # UNUSED
            if collection_name == "All":
                a = id_store.rigify_types.add()
                a.name = r
            elif r.startswith(collection_name + '.'):
                a = id_store.rigify_types.add()
                a.name = r
            elif collection_name == "None" and len(r.split('.')) == 1:
                a = id_store.rigify_types.add()
                a.name = r

        # Rig type field
        row = layout.row()
        row.prop_search(bone, "rigify_type", id_store, "rigify_types", text="Rig type:")

        # Rig type parameters / Rig type non-exist alert
        if rig_name != "":
            try:
                rig = get_rig_type(rig_name)
                rig.Rig
            except (ImportError, AttributeError):
                row = layout.row()
                box = row.box()
                box.label(text="ALERT: type \"%s\" does not exist!" % rig_name)
            else:
                try:
                    rig.parameters_ui
                except AttributeError:
                    col = layout.column()
                    col.label(text="No options")
                else:
                    col = layout.column()
                    col.label(text="Options:")
                    box = layout.box()
                    rig.parameters_ui(box, bone.rigify_parameters)


class VIEW3D_PT_tools_rigify_dev(bpy.types.Panel):
    bl_label = "Rigify Dev Tools"
    bl_category = 'Tools'
    bl_space_type = 'VIEW_3D'
    bl_region_type = 'TOOLS'

    def draw(self, context):
        obj = context.active_object
        if obj is not None:
            if context.mode == 'EDIT_ARMATURE':
                r = self.layout.row()
                r.operator("armature.rigify_encode_metarig", text="Encode Metarig to Python")
                r = self.layout.row()
                r.operator("armature.rigify_encode_metarig_sample", text="Encode Sample to Python")

            if context.mode == 'EDIT_MESH':
                r = self.layout.row()
                r.operator("mesh.rigify_encode_mesh_widget", text="Encode Mesh Widget to Python")


def rigify_report_exception(operator, exception):
    import traceback
    import sys
    import os
    # find the module name where the error happened
    # hint, this is the metarig type!
    exceptionType, exceptionValue, exceptionTraceback = sys.exc_info()
    fn = traceback.extract_tb(exceptionTraceback)[-1][0]
    fn = os.path.basename(fn)
    fn = os.path.splitext(fn)[0]
    message = []
    if fn.startswith("__"):
        message.append("Incorrect armature...")
    else:
        message.append("Incorrect armature for type '%s'" % fn)
    message.append(exception.message)

    message.reverse()  # XXX - stupid! menu's are upside down!

    operator.report({'INFO'}, '\n'.join(message))


class LayerInit(bpy.types.Operator):
    """Initialize armature rigify layers"""

    bl_idname = "pose.rigify_layer_init"
    bl_label = "Add Rigify Layers"
    bl_options = {'UNDO'}

    def execute(self, context):
        obj = context.object
        arm = obj.data
        for i in range(1 + len(arm.rigify_layers), 30):
            arm.rigify_layers.add()
        arm.rigify_layers[28].name = 'Root'
        arm.rigify_layers[28].row = 14
        return {'FINISHED'}


class Generate(bpy.types.Operator):
    """Generates a rig from the active metarig armature"""

    bl_idname = "pose.rigify_generate"
    bl_label = "Rigify Generate Rig"
    bl_options = {'UNDO'}
    bl_description = 'Generates a rig from the active metarig armature'

    def execute(self, context):
        import importlib
        importlib.reload(generate)

        use_global_undo = context.user_preferences.edit.use_global_undo
        context.user_preferences.edit.use_global_undo = False
        try:
            generate.generate_rig(context, context.object)
        except MetarigError as rig_exception:
            rigify_report_exception(self, rig_exception)
        finally:
            context.user_preferences.edit.use_global_undo = use_global_undo

        return {'FINISHED'}


class UpgradeMetarigTypes(bpy.types.Operator):
    """Upgrades metarig bones rigify_types"""

    bl_idname = "pose.rigify_upgrade_types"
    bl_label = "Rigify Upgrade Metarig Types"
    bl_description = 'Upgrades the rigify types on the active metarig armature'
    bl_options = {'UNDO'}

    def execute(self, context):
        for obj in bpy.data.objects:
            if type(obj.data) == bpy.types.Armature:
                upgradeMetarigTypes(obj)
        return {'FINISHED'}


class Sample(bpy.types.Operator):
    """Create a sample metarig to be modified before generating """ \
    """the final rig"""

    bl_idname = "armature.metarig_sample_add"
    bl_label = "Add a sample metarig for a rig type"
    bl_options = {'UNDO'}

    metarig_type = StringProperty(
            name="Type",
            description="Name of the rig type to generate a sample of",
            maxlen=128,
            )

    def execute(self, context):
        if context.mode == 'EDIT_ARMATURE' and self.metarig_type != "":
            use_global_undo = context.user_preferences.edit.use_global_undo
            context.user_preferences.edit.use_global_undo = False
            try:
                rig = get_rig_type(self.metarig_type)
                create_sample = rig.create_sample
            except (ImportError, AttributeError):
                raise Exception("rig type '" + self.metarig_type + "' has no sample.")
            else:
                create_sample(context.active_object)
            finally:
                context.user_preferences.edit.use_global_undo = use_global_undo
                bpy.ops.object.mode_set(mode='EDIT')

        return {'FINISHED'}


class EncodeMetarig(bpy.types.Operator):
    """ Creates Python code that will generate the selected metarig.
    """
    bl_idname = "armature.rigify_encode_metarig"
    bl_label = "Rigify Encode Metarig"
    bl_options = {'UNDO'}

    @classmethod
    def poll(self, context):
        return context.mode == 'EDIT_ARMATURE'

    def execute(self, context):
        name = "metarig.py"

        if name in bpy.data.texts:
            text_block = bpy.data.texts[name]
            text_block.clear()
        else:
            text_block = bpy.data.texts.new(name)

        text = write_metarig(context.active_object, layers=True, func_name="create", groups=True)
        text_block.write(text)
        bpy.ops.object.mode_set(mode='EDIT')

        return {'FINISHED'}


class EncodeMetarigSample(bpy.types.Operator):
    """ Creates Python code that will generate the selected metarig
        as a sample.
    """
    bl_idname = "armature.rigify_encode_metarig_sample"
    bl_label = "Rigify Encode Metarig Sample"
    bl_options = {'UNDO'}

    @classmethod
    def poll(self, context):
        return context.mode == 'EDIT_ARMATURE'

    def execute(self, context):
        name = "metarig_sample.py"

        if name in bpy.data.texts:
            text_block = bpy.data.texts[name]
            text_block.clear()
        else:
            text_block = bpy.data.texts.new(name)

        text = write_metarig(context.active_object, layers=False, func_name="create_sample")
        text_block.write(text)
        bpy.ops.object.mode_set(mode='EDIT')

        return {'FINISHED'}


class EncodeWidget(bpy.types.Operator):
    """ Creates Python code that will generate the selected metarig.
    """
    bl_idname = "mesh.rigify_encode_mesh_widget"
    bl_label = "Rigify Encode Widget"
    bl_options = {'UNDO'}

    @classmethod
    def poll(self, context):
        return context.mode == 'EDIT_MESH'

    def execute(self, context):
        name = "widget.py"

        if name in bpy.data.texts:
            text_block = bpy.data.texts[name]
            text_block.clear()
        else:
            text_block = bpy.data.texts.new(name)

        text = write_widget(context.active_object)
        text_block.write(text)
        bpy.ops.object.mode_set(mode='EDIT')

        return {'FINISHED'}


#menu_func = (lambda self, context: self.layout.menu("INFO_MT_armature_metarig_add", icon='OUTLINER_OB_ARMATURE'))

#from bl_ui import space_info  # ensure the menu is loaded first

def register():

    bpy.utils.register_class(DATA_OT_rigify_add_bone_groups)
    bpy.utils.register_class(DATA_OT_rigify_use_standard_colors)
    bpy.utils.register_class(DATA_OT_rigify_apply_selection_colors)
    bpy.utils.register_class(DATA_OT_rigify_bone_group_add)
    bpy.utils.register_class(DATA_OT_rigify_bone_group_add_theme)
    bpy.utils.register_class(DATA_OT_rigify_bone_group_remove)
    bpy.utils.register_class(DATA_OT_rigify_bone_group_remove_all)
    bpy.utils.register_class(DATA_UL_rigify_bone_groups)
    bpy.utils.register_class(DATA_PT_rigify_bone_groups_specials)
    bpy.utils.register_class(DATA_PT_rigify_bone_groups)
    bpy.utils.register_class(DATA_PT_rigify_layer_names)
    bpy.utils.register_class(DATA_PT_rigify_buttons)
    bpy.utils.register_class(BONE_PT_rigify_buttons)
    bpy.utils.register_class(VIEW3D_PT_tools_rigify_dev)
    bpy.utils.register_class(LayerInit)
    bpy.utils.register_class(Generate)
    bpy.utils.register_class(UpgradeMetarigTypes)
    bpy.utils.register_class(Sample)
    bpy.utils.register_class(EncodeMetarig)
    bpy.utils.register_class(EncodeMetarigSample)
    bpy.utils.register_class(EncodeWidget)
    #space_info.INFO_MT_armature_add.append(ui.menu_func)


def unregister():

    bpy.utils.unregister_class(DATA_OT_rigify_add_bone_groups)
    bpy.utils.unregister_class(DATA_OT_rigify_use_standard_colors)
    bpy.utils.unregister_class(DATA_OT_rigify_apply_selection_colors)
    bpy.utils.unregister_class(DATA_OT_rigify_bone_group_add)
    bpy.utils.unregister_class(DATA_OT_rigify_bone_group_add_theme)
    bpy.utils.unregister_class(DATA_OT_rigify_bone_group_remove)
    bpy.utils.unregister_class(DATA_OT_rigify_bone_group_remove_all)
    bpy.utils.unregister_class(DATA_UL_rigify_bone_groups)
    bpy.utils.unregister_class(DATA_PT_rigify_bone_groups_specials)
    bpy.utils.unregister_class(DATA_PT_rigify_bone_groups)
    bpy.utils.unregister_class(DATA_PT_rigify_layer_names)
    bpy.utils.unregister_class(DATA_PT_rigify_buttons)
    bpy.utils.unregister_class(BONE_PT_rigify_buttons)
    bpy.utils.unregister_class(VIEW3D_PT_tools_rigify_dev)
    bpy.utils.unregister_class(LayerInit)
    bpy.utils.unregister_class(Generate)
    bpy.utils.unregister_class(UpgradeMetarigTypes)
    bpy.utils.unregister_class(Sample)
    bpy.utils.unregister_class(EncodeMetarig)
    bpy.utils.unregister_class(EncodeMetarigSample)
    bpy.utils.unregister_class(EncodeWidget)