poll() as a python '@staticmethod' was too limiting and didnt allow useful base class poll functions in many cases.

now rna functions that dont have a 'self' are automatically assumed '@classmethods'.

de-duplicated poll functions and made some minor tweaks too.

release/scripts/ui/properties_data_mesh.py

@@ -47,22 +47,22 @@ class MESH_MT_shape_key_specials(bpy.types.Menu):
         layout.operator("object.shape_key_mirror", icon='ARROW_LEFTRIGHT')
 
 
-class DataButtonsPanel():
+class MeshButtonsPanel():
     bl_space_type = 'PROPERTIES'
     bl_region_type = 'WINDOW'
     bl_context = "data"
 
+    @classmethod
+    def poll(cls, context):
+        engine = context.scene.render.engine
+        return context.mesh and (engine in cls.COMPAT_ENGINES)
 
-class DATA_PT_context_mesh(DataButtonsPanel, bpy.types.Panel):
+
+class DATA_PT_context_mesh(MeshButtonsPanel, bpy.types.Panel):
     bl_label = ""
     bl_show_header = False
     COMPAT_ENGINES = {'BLENDER_RENDER', 'BLENDER_GAME'}
 
-    @staticmethod
-    def poll(context):
-        engine = context.scene.render.engine
-        return context.mesh and (engine in __class__.COMPAT_ENGINES)
-
     def draw(self, context):
         layout = self.layout
 
@@ -79,25 +79,15 @@ class DATA_PT_context_mesh(DataButtonsPanel, bpy.types.Panel):
             split.separator()
 
 
-class DATA_PT_custom_props_mesh(DataButtonsPanel, PropertyPanel, bpy.types.Panel):
-    _context_path = "object.data"
+class DATA_PT_custom_props_mesh(MeshButtonsPanel, PropertyPanel, bpy.types.Panel):
     COMPAT_ENGINES = {'BLENDER_RENDER', 'BLENDER_GAME'}
-
-    @staticmethod
-    def poll(context):
-        engine = context.scene.render.engine
-        return context.mesh and (engine in __class__.COMPAT_ENGINES)
+    _context_path = "object.data"
 
 
-class DATA_PT_normals(DataButtonsPanel, bpy.types.Panel):
+class DATA_PT_normals(MeshButtonsPanel, bpy.types.Panel):
     bl_label = "Normals"
     COMPAT_ENGINES = {'BLENDER_RENDER', 'BLENDER_GAME'}
 
-    @staticmethod
-    def poll(context):
-        engine = context.scene.render.engine
-        return context.mesh and (engine in __class__.COMPAT_ENGINES)
-
     def draw(self, context):
         layout = self.layout
 
@@ -116,15 +106,10 @@ class DATA_PT_normals(DataButtonsPanel, bpy.types.Panel):
         col.prop(mesh, "double_sided")
 
 
-class DATA_PT_settings(DataButtonsPanel, bpy.types.Panel):
+class DATA_PT_settings(MeshButtonsPanel, bpy.types.Panel):
     bl_label = "Settings"
     COMPAT_ENGINES = {'BLENDER_RENDER', 'BLENDER_GAME'}
 
-    @staticmethod
-    def poll(context):
-        engine = context.scene.render.engine
-        return context.mesh and (engine in __class__.COMPAT_ENGINES)
-
     def draw(self, context):
         layout = self.layout
 
@@ -133,15 +118,15 @@ class DATA_PT_settings(DataButtonsPanel, bpy.types.Panel):
         layout.prop(mesh, "texture_mesh")
 
 
-class DATA_PT_vertex_groups(DataButtonsPanel, bpy.types.Panel):
+class DATA_PT_vertex_groups(MeshButtonsPanel, bpy.types.Panel):
     bl_label = "Vertex Groups"
     COMPAT_ENGINES = {'BLENDER_RENDER', 'BLENDER_GAME'}
 
-    @staticmethod
-    def poll(context):
+    @classmethod
+    def poll(cls, context):
         engine = context.scene.render.engine
         obj = context.object
-        return (obj and obj.type in ('MESH', 'LATTICE') and (engine in __class__.COMPAT_ENGINES))
+        return (obj and obj.type in ('MESH', 'LATTICE') and (engine in cls.COMPAT_ENGINES))
 
     def draw(self, context):
         layout = self.layout
@@ -182,15 +167,15 @@ class DATA_PT_vertex_groups(DataButtonsPanel, bpy.types.Panel):
             layout.prop(context.tool_settings, "vertex_group_weight", text="Weight")
 
 
-class DATA_PT_shape_keys(DataButtonsPanel, bpy.types.Panel):
+class DATA_PT_shape_keys(MeshButtonsPanel, bpy.types.Panel):
     bl_label = "Shape Keys"
     COMPAT_ENGINES = {'BLENDER_RENDER', 'BLENDER_GAME'}
 
-    @staticmethod
-    def poll(context):
+    @classmethod
+    def poll(cls, context):
         engine = context.scene.render.engine
         obj = context.object
-        return (obj and obj.type in ('MESH', 'LATTICE', 'CURVE', 'SURFACE') and (engine in __class__.COMPAT_ENGINES))
+        return (obj and obj.type in ('MESH', 'LATTICE', 'CURVE', 'SURFACE') and (engine in cls.COMPAT_ENGINES))
 
     def draw(self, context):
         layout = self.layout
@@ -274,15 +259,10 @@ class DATA_PT_shape_keys(DataButtonsPanel, bpy.types.Panel):
                 row.prop(key, "slurph")
 
 
-class DATA_PT_uv_texture(DataButtonsPanel, bpy.types.Panel):
+class DATA_PT_uv_texture(MeshButtonsPanel, bpy.types.Panel):
     bl_label = "UV Texture"
     COMPAT_ENGINES = {'BLENDER_RENDER', 'BLENDER_GAME'}
 
-    @staticmethod
-    def poll(context):
-        engine = context.scene.render.engine
-        return context.mesh and (engine in __class__.COMPAT_ENGINES)
-
     def draw(self, context):
         layout = self.layout
 
@@ -302,12 +282,12 @@ class DATA_PT_uv_texture(DataButtonsPanel, bpy.types.Panel):
             layout.prop(lay, "name")
 
 
-class DATA_PT_texface(DataButtonsPanel, bpy.types.Panel):
+class DATA_PT_texface(MeshButtonsPanel, bpy.types.Panel):
     bl_label = "Texture Face"
     COMPAT_ENGINES = {'BLENDER_RENDER', 'BLENDER_GAME'}
 
-    @staticmethod
-    def poll(context):
+    @classmethod
+    def poll(cls, context):
         ob = context.active_object
         rd = context.scene.render
 
@@ -348,15 +328,10 @@ class DATA_PT_texface(DataButtonsPanel, bpy.types.Panel):
             col.label(text="No UV Texture")
 
 
-class DATA_PT_vertex_colors(DataButtonsPanel, bpy.types.Panel):
+class DATA_PT_vertex_colors(MeshButtonsPanel, bpy.types.Panel):
     bl_label = "Vertex Colors"
     COMPAT_ENGINES = {'BLENDER_RENDER', 'BLENDER_GAME'}
 
-    @staticmethod
-    def poll(context):
-        engine = context.scene.render.engine
-        return context.mesh and (engine in __class__.COMPAT_ENGINES)
-
     def draw(self, context):
         layout = self.layout