materialx/__init__.py

@@ -35,10 +35,16 @@ from . import logging
 log = logging.Log("__init__")
 
 
+register_classes, unregister_classes = bpy.utils.register_classes_factory([
+    node_tree.MxNodeTree,
+    preferences.AddonPreferences,
+])
+
+
 def register():
     log("register")
-    bpy.utils.register_class(preferences.AddonPreferences)
-    bpy.utils.register_class(node_tree.MxNodeTree)
+
+    register_classes()
     nodes.register()
     matlib.register()
     material.register()
@@ -46,8 +52,8 @@ def register():
 
 def unregister():
     log("unregister")
+
+    material.unregister()
     matlib.unregister()
     nodes.unregister()
-    material.unregister()
-    bpy.utils.unregister_class(node_tree.MxNodeTree)
-    bpy.utils.unregister_class(preferences.AddonPreferences)
+    unregister_classes()

materialx/nodes/ui.py

@@ -11,6 +11,7 @@ from bpy_extras.io_utils import ImportHelper, ExportHelper
 
 from ..node_tree import MxNodeTree
 from .. import utils
+from ..preferences import addon_preferences
 
 from ..utils import logging
 log = logging.Log('nodes.ui')
@@ -194,9 +195,7 @@ class NODES_PT_dev(bpy.types.Panel):
 
     @classmethod
     def poll(cls, context):
-        # TODO: enable
-        # return config.show_dev_settings
-        return True
+        return addon_preferences().dev_tools
 
     def draw(self, context):
         layout = self.layout

materialx/preferences.py

@@ -3,12 +3,38 @@
 
 import bpy
 
-from .utils import with_prefix
+from . import logging, ADDON_ALIAS
 
 
 class AddonPreferences(bpy.types.AddonPreferences):
-    bl_idname = with_prefix('AddonPreferences')
+    bl_idname = ADDON_ALIAS
+
+    def update_log_level(self, context):
+        logging.logger.setLevel(self.log_level)
+
+    dev_tools: bpy.props.BoolProperty(
+        name="Developer Tools",
+        description="Enable developer tools",
+        default=False,
+    )
+    log_level: bpy.props.EnumProperty(
+        name="Log Level",
+        description="Select logging level",
+        items=(('DEBUG', "Debug", "Log level DEBUG"),
+               ('INFO', "Info", "Log level INFO"),
+               ('WARNING', "Warning", "Log level WARN"),
+               ('ERROR', "Error", "Log level ERROR"),
+               ('CRITICAL', "Critical", "Log level CRITICAL")),
+        default='INFO',
+        update=update_log_level,
+    )
 
     def draw(self, context):
         layout = self.layout
-        layout.label(text="MaterialX addon preferences")
+        col = layout.column()
+        col.prop(self, "dev_tools")
+        col.prop(self, "log_level")
+
+
+def addon_preferences():
+    return bpy.context.preferences.addons[ADDON_ALIAS].preferences

materialx/utils.py

@@ -16,7 +16,7 @@ log = logging.Log('utils')
 
 
 ADDON_ROOT_DIR = Path(__file__).parent
-ADDON_DATA_DIR = Path(bpy.utils.user_resource("SCRIPTS", path=f"addons/{ADDON_ALIAS}", create=True))
+ADDON_DATA_DIR = Path(bpy.utils.user_resource("SCRIPTS", path=f"addons/{ADDON_ALIAS}_data", create=True))
 
 MX_LIBS_FOLDER = "libraries"
 MX_LIBS_DIR = ADDON_ROOT_DIR / MX_LIBS_FOLDER