ui.py

        layout.active = cam.pov.normal_enable

        layout.prop(cam.pov, "normal_patterns")
        layout.prop(cam.pov, "cam_normal")
        layout.prop(cam.pov, "turbulence")
        layout.prop(cam.pov, "scale")


class CAMERA_PT_POV_replacement_text(CameraDataButtonsPanel, Panel):
    """Use this class for camera text replacement field."""

    bl_label = "Custom POV Code"
    COMPAT_ENGINES = {'POVRAY_RENDER'}

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

        cam = context.camera

        col = layout.column()
        col.label(text="Replace properties with:")
        col.prop(cam.pov, "replacement_text", text="")


###############################################################################
# Text Povray Settings
###############################################################################


class TEXT_OT_POV_insert(Operator):
    """Use this class to create blender text editor operator to insert pov snippets like other pov IDEs."""

    bl_idname = "text.povray_insert"
    bl_label = "Insert"

    filepath: bpy.props.StringProperty(name="Filepath", subtype='FILE_PATH')

    @classmethod
    def poll(cls, context):
        # context.area.type == 'TEXT_EDITOR'
        return bpy.ops.text.insert.poll()

    def execute(self, context):
        if self.filepath and isfile(self.filepath):
            file = open(self.filepath, "r")
            bpy.ops.text.insert(text=file.read())

            # places the cursor at the end without scrolling -.-
            # context.space_data.text.write(file.read())
            file.close()
        return {'FINISHED'}


def validinsert(ext):
    return ext in {".txt", ".inc", ".pov"}


class TEXT_MT_POV_insert(bpy.types.Menu):
    """Use this class to create a menu launcher in text editor for the TEXT_OT_POV_insert operator ."""

    bl_label = "Insert"
    bl_idname = "TEXT_MT_POV_insert"

    def draw(self, context):
        pov_documents = locate_docpath()
        prop = self.layout.operator(
            "wm.path_open", text="Open folder", icon='FILE_FOLDER'
        )
        prop.filepath = pov_documents
        self.layout.separator()

        list = []
        for root, dirs, files in os.walk(pov_documents):
            list.append(root)
        print(list)
        self.path_menu(
            list,
            "text.povray_insert",
            # {"internal": True},
            filter_ext=validinsert,
        )


class TEXT_PT_POV_custom_code(TextButtonsPanel, Panel):
    """Use this class to create a panel in text editor for the user to decide if he renders text only or adds to 3d scene."""

    bl_label = "POV"
    COMPAT_ENGINES = {'POVRAY_RENDER'}

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

        text = context.space_data.text

        pov_documents = locate_docpath()
        if not pov_documents:
            layout.label(text="Please configure ", icon="INFO")
            layout.label(text="default pov include path ")
            layout.label(text="in addon preferences")
            # layout.separator()
            layout.operator(
                "preferences.addon_show",
                text="Go to Render: Persistence of Vision addon",
                icon="PREFERENCES",
            ).module = "render_povray"

            # layout.separator()
        else:
            # print(pov_documents)
            layout.menu(TEXT_MT_POV_insert.bl_idname)

        if text:
            box = layout.box()
            box.label(text='Source to render:', icon='RENDER_STILL')
            row = box.row()
            row.prop(text.pov, "custom_code", expand=True)
            if text.pov.custom_code in {'3dview'}:
                box.operator("render.render", icon='OUTLINER_DATA_POSE')
            if text.pov.custom_code in {'text'}:
                rtext = bpy.context.space_data.text
                box.operator("text.run", icon='POSE_DATA')
            # layout.prop(text.pov, "custom_code")
            elif text.pov.custom_code in {'both'}:
                box.operator("render.render", icon='POSE_HLT')
                layout.label(text="Please specify declared", icon="INFO")
                layout.label(text="items in properties ")
                # layout.label(text="")
                layout.label(text="replacement fields")


###############################################
# Text editor templates from header menu


class TEXT_MT_POV_templates(bpy.types.Menu):
    """Use this class to create a menu for the same pov templates scenes as other pov IDEs."""

    bl_label = "POV"

    # We list templates on file evaluation, we can assume they are static data,
    # and better avoid running this on every draw call.
    import os

    template_paths = [os.path.join(os.path.dirname(__file__), "templates_pov")]

    def draw(self, context):
        self.path_menu(
            self.template_paths, "text.open", props_default={"internal": True}
        )


def menu_func_templates(self, context):
    # Do not depend on POV being active renderer here...
    self.layout.menu("TEXT_MT_POV_templates")


classes = (
    WORLD_PT_POV_world,
    WORLD_MT_POV_presets,
    WORLD_OT_POV_add_preset,
    WORLD_TEXTURE_SLOTS_UL_List,
    WORLD_PT_POV_mist,
    # RenderButtonsPanel,
    # ModifierButtonsPanel,
    # MaterialButtonsPanel,
    # TextureButtonsPanel,
    # ObjectButtonsPanel,
    # CameraDataButtonsPanel,
    # WorldButtonsPanel,
    # TextButtonsPanel,
    # PovDataButtonsPanel,
    DATA_PT_POV_normals,
    DATA_PT_POV_texture_space,
    DATA_PT_POV_vertex_groups,
    DATA_PT_POV_shape_keys,
    DATA_PT_POV_uv_texture,
    DATA_PT_POV_vertex_colors,
    DATA_PT_POV_customdata,
    # PovLampButtonsPanel,
    LIGHT_PT_POV_preview,
    LIGHT_PT_POV_light,
    LIGHT_MT_POV_presets,
    LIGHT_OT_POV_add_preset,
    OBJECT_PT_POV_rainbow,
    RENDER_PT_POV_export_settings,
    RENDER_PT_POV_render_settings,
    RENDER_PT_POV_photons,
    RENDER_PT_POV_antialias,
    RENDER_PT_POV_radiosity,
    POV_RADIOSITY_MT_presets,
    RENDER_OT_POV_radiosity_add_preset,
    RENDER_PT_POV_media,
    MODIFIERS_PT_POV_modifiers,
    MATERIAL_PT_POV_sss,
    MATERIAL_MT_POV_sss_presets,
    MATERIAL_OT_POV_sss_add_preset,
    MATERIAL_PT_strand,
    MATERIAL_PT_POV_activate_node,
    MATERIAL_PT_POV_active_node,
    MATERIAL_PT_POV_specular,
    MATERIAL_PT_POV_mirror,
    MATERIAL_PT_POV_transp,
    MATERIAL_PT_POV_reflection,
    # MATERIAL_PT_POV_interior,
    MATERIAL_PT_POV_fade_color,
    MATERIAL_PT_POV_caustics,
    MATERIAL_PT_POV_replacement_text,
    TEXTURE_MT_POV_specials,
    TEXTURE_PT_POV_context_texture,
    TEXTURE_PT_POV_type,
    TEXTURE_PT_POV_preview,
    TEXTURE_PT_POV_parameters,
    TEXTURE_PT_POV_tex_gamma,
    OBJECT_PT_POV_obj_parameters,
    OBJECT_PT_POV_obj_sphere,
    OBJECT_PT_POV_obj_cylinder,
    OBJECT_PT_POV_obj_cone,
    OBJECT_PT_POV_obj_superellipsoid,
    OBJECT_PT_POV_obj_torus,
    OBJECT_PT_POV_obj_supertorus,
    OBJECT_PT_POV_obj_parametric,
    OBJECT_PT_povray_replacement_text,
    VIEW_MT_POV_primitives_add,
    VIEW_MT_POV_Basic_Shapes,
    VIEW_MT_POV_import,
    NODE_MT_POV_map_create,
    CAMERA_PT_POV_cam_dof,
    CAMERA_PT_POV_cam_nor,
    CAMERA_PT_POV_replacement_text,
    TEXT_OT_POV_insert,
    TEXT_MT_POV_insert,
    TEXT_PT_POV_custom_code,
    TEXT_MT_POV_templates,
    # TEXTURE_PT_context,
    # TEXTURE_PT_POV_povray_texture_slots,
    TEXTURE_UL_POV_texture_slots,
    MATERIAL_TEXTURE_SLOTS_UL_POV_layerlist,
    MATERIAL_OT_POV_texture_slot_add,
    MATERIAL_OT_POV_texture_slot_remove,
    TEXTURE_PT_POV_influence,
)


def register():
    # from bpy.utils import register_class

    for cls in classes:
        register_class(cls)

    bpy.types.VIEW3D_MT_add.prepend(menu_func_add)
    bpy.types.TOPBAR_MT_file_import.append(menu_func_import)
    bpy.types.TEXT_MT_templates.append(menu_func_templates)
    bpy.types.RENDER_PT_POV_radiosity.prepend(rad_panel_func)
    bpy.types.LIGHT_PT_POV_light.prepend(light_panel_func)
    # bpy.types.WORLD_PT_POV_world.prepend(world_panel_func)
    # was used for parametric objects but made the other addon unreachable on
    # unregister for other tools to use created a user action call instead
    # addon_utils.enable("add_mesh_extra_objects", default_set=False, persistent=True)

    # bpy.types.TEXTURE_PT_context_texture.prepend(TEXTURE_PT_POV_type)


def unregister():
    # from bpy.utils import unregister_class

    # bpy.types.TEXTURE_PT_context_texture.remove(TEXTURE_PT_POV_type)
    # addon_utils.disable("add_mesh_extra_objects", default_set=False)
    # bpy.types.WORLD_PT_POV_world.remove(world_panel_func)
    bpy.types.LIGHT_PT_POV_light.remove(light_panel_func)
    bpy.types.RENDER_PT_POV_radiosity.remove(rad_panel_func)
    bpy.types.TEXT_MT_templates.remove(menu_func_templates)
    bpy.types.TOPBAR_MT_file_import.remove(menu_func_import)
    bpy.types.VIEW3D_MT_add.remove(menu_func_add)

    for cls in reversed(classes):
        unregister_class(cls)