text: # ##### 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.types import Panel, Menu
  from rna_prop_ui import PropertyPanel
  
  from .properties_animviz import (
      MotionPathButtonsPanel,
      MotionPathButtonsPanel_display,
  )
  
  
  class ArmatureButtonsPanel:
      bl_space_type = 'PROPERTIES'
      bl_region_type = 'WINDOW'
      bl_context = "data"
  
      @classmethod
      def poll(cls, context):
          return context.armature
  
  
  class DATA_PT_context_arm(ArmatureButtonsPanel, Panel):
      bl_label = ""
      bl_options = {'HIDE_HEADER'}
  
      def draw(self, context):
          layout = self.layout
  
          ob = context.object
          arm = context.armature
          space = context.space_data
  
          if ob:
              layout.template_ID(ob, "data")
          elif arm:
              layout.template_ID(space, "pin_id")
  
  
  class DATA_PT_skeleton(ArmatureButtonsPanel, Panel):
      bl_label = "Skeleton"
  
      def draw(self, context):
          layout = self.layout
  
          arm = context.armature
  
          layout.row().prop(arm, "pose_position", expand=True)
  
          col = layout.column()
          col.label(text="Layers:")
          col.prop(arm, "layers", text="")
          col.label(text="Protected Layers:")
          col.prop(arm, "layers_protected", text="")
  
  
  class DATA_PT_display(ArmatureButtonsPanel, Panel):
      bl_label = "Viewport Display"
      bl_options = {'DEFAULT_CLOSED'}
  
      def draw(self, context):
          layout = self.layout
          layout.use_property_split = True
  
          ob = context.object
          arm = context.armature
  
          layout.prop(arm, "display_type", text="Display As")
  
          flow = layout.grid_flow(row_major=False, columns=0, even_columns=False, even_rows=False, align=True)
          col = flow.column()
          col.prop(arm, "show_names", text="Names")
          col = flow.column()
          col.prop(arm, "show_axes", text="Axes")
          col = flow.column()
          col.prop(arm, "show_bone_custom_shapes", text="Shapes")
          col = flow.column()
          col.prop(arm, "show_group_colors", text="Group Colors")
          if ob:
              col = flow.column()
              col.prop(ob, "show_in_front", text="In Front")
          col = flow.column()
          col.prop(arm, "use_deform_delay", text="Delay Refresh")
  
  
  class DATA_MT_bone_group_context_menu(Menu):
      bl_label = "Bone Group Specials"
  
      def draw(self, _context):
          layout = self.layout
  
          layout.operator("pose.group_sort", icon='SORTALPHA')
  
  
  class DATA_PT_bone_groups(ArmatureButtonsPanel, Panel):
      bl_label = "Bone Groups"
      bl_options = {'DEFAULT_CLOSED'}
  
      @classmethod
      def poll(cls, context):
          return (context.object and context.object.type == 'ARMATURE' and context.object.pose)
  
      def draw(self, context):
          layout = self.layout
  
          ob = context.object
          pose = ob.pose
          group = pose.bone_groups.active
  
          row = layout.row()
  
          rows = 1
          if group:
              rows = 4
          row.template_list("UI_UL_list", "bone_groups", pose, "bone_groups", pose.bone_groups, "active_index", rows=rows)
  
          col = row.column(align=True)
          col.active = (ob.proxy is None)
          col.operator("pose.group_add", icon='ADD', text="")
          col.operator("pose.group_remove", icon='REMOVE', text="")
          col.menu("DATA_MT_bone_group_context_menu", icon='DOWNARROW_HLT', text="")
          if group:
              col.separator()
              col.operator("pose.group_move", icon='TRIA_UP', text="").direction = 'UP'
              col.operator("pose.group_move", icon='TRIA_DOWN', text="").direction = 'DOWN'
  
              split = layout.split()
              split.active = (ob.proxy is None)
  
              col = split.column()
              col.prop(group, "color_set")
              if group.color_set:
                  col = split.column()
                  sub = col.row(align=True)
                  sub.enabled = group.is_custom_color_set  # only custom colors are editable
                  sub.prop(group.colors, "normal", text="")
                  sub.prop(group.colors, "select", text="")
                  sub.prop(group.colors, "active", text="")
  
          row = layout.row()
          row.active = (ob.proxy is None)
  
          sub = row.row(align=True)
          sub.operator("pose.group_assign", text="Assign")
          # row.operator("pose.bone_group_remove_from", text="Remove")
          sub.operator("pose.group_unassign", text="Remove")
  
          sub = row.row(align=True)
          sub.operator("pose.group_select", text="Select")
          sub.operator("pose.group_deselect", text="Deselect")
  
  
  class DATA_PT_pose_library(ArmatureButtonsPanel, Panel):
      bl_label = "Pose Library"
      bl_options = {'DEFAULT_CLOSED'}
  
      @classmethod
      def poll(cls, context):
          return (context.object and context.object.type == 'ARMATURE' and context.object.pose)
  
      def draw(self, context):
          layout = self.layout
  
          ob = context.object
          poselib = ob.pose_library
  
          layout.template_ID(ob, "pose_library", new="poselib.new", unlink="poselib.unlink")
  
          if poselib:
              # warning about poselib being in an invalid state
              if poselib.fcurves and not poselib.pose_markers:
                  layout.label(icon='ERROR', text="Error: Potentially corrupt library, run 'Sanitize' operator to fix")
  
              # list of poses in pose library
              row = layout.row()
              row.template_list("UI_UL_list", "pose_markers", poselib, "pose_markers",
                                poselib.pose_markers, "active_index", rows=5)
  
              # column of operators for active pose
              # - goes beside list
              col = row.column(align=True)
  
              # invoke should still be used for 'add', as it is needed to allow
              # add/replace options to be used properly
              col.operator("poselib.pose_add", icon='ADD', text="")
  
              col.operator_context = 'EXEC_DEFAULT'  # exec not invoke, so that menu doesn't need showing
  
              pose_marker_active = poselib.pose_markers.active
  
              if pose_marker_active is not None:
                  col.operator("poselib.pose_remove", icon='REMOVE', text="")
                  col.operator(
                      "poselib.apply_pose",
                      icon='ZOOM_SELECTED',
                      text="",
                  ).pose_index = poselib.pose_markers.active_index
  
              col.operator("poselib.action_sanitize", icon='HELP', text="")  # XXX: put in menu?
  
              if pose_marker_active is not None:
                  col.operator("poselib.pose_move", icon='TRIA_UP', text="").direction = 'UP'
                  col.operator("poselib.pose_move", icon='TRIA_DOWN', text="").direction = 'DOWN'
  
  
  class DATA_PT_iksolver_itasc(ArmatureButtonsPanel, Panel):
      bl_label = "Inverse Kinematics"
      bl_options = {'DEFAULT_CLOSED'}
  
      @classmethod
      def poll(cls, context):
          ob = context.object
          return (ob and ob.pose)
  
      def draw(self, context):
          layout = self.layout
          layout.use_property_split = True
  
          ob = context.object
          itasc = ob.pose.ik_param
  
          layout.prop(ob.pose, "ik_solver")
  
          if itasc:
              layout.prop(itasc, "mode")
              simulation = (itasc.mode == 'SIMULATION')
              if simulation:
                  layout.prop(itasc, "reiteration_method", expand=False)
  
              col = layout.column()
              col.active = not simulation or itasc.reiteration_method != 'NEVER'
              col.prop(itasc, "precision")
              col.prop(itasc, "iterations")
  
              if simulation:
                  col.prop(itasc, "use_auto_step")
                  sub = layout.column(align=True)
                  if itasc.use_auto_step:
                      sub.prop(itasc, "step_min", text="Steps Min")
                      sub.prop(itasc, "step_max", text="Max")
                  else:
                      sub.prop(itasc, "step_count", text="Steps")
  
              col.prop(itasc, "solver")
              if simulation:
                  col.prop(itasc, "feedback")
                  col.prop(itasc, "velocity_max")
              if itasc.solver == 'DLS':
                  col.separator()
                  col.prop(itasc, "damping_max", text="Damping Max", slider=True)
                  col.prop(itasc, "damping_epsilon", text="Damping Epsilon", slider=True)
  
  
  class DATA_PT_motion_paths(MotionPathButtonsPanel, Panel):
      #bl_label = "Bones Motion Paths"
      bl_options = {'DEFAULT_CLOSED'}
      bl_context = "data"
  
      @classmethod
      def poll(cls, context):
          # XXX: include pose-mode check?
          return (context.object) and (context.armature)
  
      def draw(self, context):
          # layout = self.layout
  
          ob = context.object
          avs = ob.pose.animation_visualization
  
          pchan = context.active_pose_bone
          mpath = pchan.motion_path if pchan else None
  
          self.draw_settings(context, avs, mpath, bones=True)
  
  
  class DATA_PT_motion_paths_display(MotionPathButtonsPanel_display, Panel):
      #bl_label = "Bones Motion Paths"
      bl_context = "data"
      bl_parent_id = "DATA_PT_motion_paths"
      bl_options = {'DEFAULT_CLOSED'}
  
      @classmethod
      def poll(cls, context):
          # XXX: include pose-mode check?
          return (context.object) and (context.armature)
  
      def draw(self, context):
          # layout = self.layout
  
          ob = context.object
          avs = ob.pose.animation_visualization
  
          pchan = context.active_pose_bone
          mpath = pchan.motion_path if pchan else None
  
          self.draw_settings(context, avs, mpath, bones=True)
  
  
  class DATA_PT_custom_props_arm(ArmatureButtonsPanel, PropertyPanel, Panel):
      COMPAT_ENGINES = {'BLENDER_RENDER', 'BLENDER_EEVEE', 'BLENDER_WORKBENCH'}
      _context_path = "object.data"
      _property_type = bpy.types.Armature
  
  
  classes = (
      DATA_PT_context_arm,
      DATA_PT_skeleton,
      DATA_MT_bone_group_context_menu,
      DATA_PT_bone_groups,
      DATA_PT_pose_library,
      DATA_PT_motion_paths,
      DATA_PT_motion_paths_display,
      DATA_PT_display,
      DATA_PT_iksolver_itasc,
      DATA_PT_custom_props_arm,
  )
  
  if __name__ == "__main__":  # only for live edit.
      from bpy.utils import register_class
      for cls in classes:
          register_class(cls)
  