CustomProps.py

bl_info = {
    "name": "Custom Property Manager",
    "author": "Nathan Craddock",
    "version": (0, 1),
    "blender": (2, 77, 0),
    "location": "UI > Properties Panel",
    "description": "Add objects to track Custom Props on",
    "tracker_url": "",
    "category": "Object"
}

import bpy

class AddObject(bpy.types.Operator):
    """Adds an object to the list"""
    bl_idname = "object.add_object_custom"
    bl_label = "Add Object"
    
    def execute(self, context):
        o = bpy.context.active_object
        if o not in context.scene.custom_props_objects:
            context.scene.custom_props_objects.append(bpy.context.active_object)
        return {'FINISHED'}
    

class RemoveObject(bpy.types.Operator):
    """Removes an object from the list"""
    bl_idname = "object.remove_object_custom"
    bl_label = "Remove Object"
    
    def execute(self, context):
        if bpy.context.active_object in context.scene.custom_props_objects:
            context.scene.custom_props_objects.remove(bpy.context.active_object)
        return {'FINISHED'}


class LayoutDemoPanel(bpy.types.Panel):
    """Creates a Panel in the scene context of the properties editor"""
    bl_label = "Custom Property Manager"
    bl_idname = "SCENE_PT_layout"
    bl_space_type = 'VIEW_3D'
    bl_region_type = 'UI'
    bl_context = "scene"

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

        scene = context.scene
        row = layout.row()

        row.operator("object.add_object_custom")
        row.operator("object.remove_object_custom")
        objects = context.scene.custom_props_objects
        
        if objects:
            row = layout.row()
            row.label(text="Custom Properties:")
        
        
        
        for o in objects:
            box = layout.box()
            box.label(text=o.name)
            
            if o.type == "MESH":
                if o.keys():
                    for prop in o.keys():
                        row = box.row()
                        row.prop(o, '["' + prop + '"]', slider=True)
                else:
                    row = box.row()
                    row.label(text=o.name + " has no CP for object")
                
                if o.data.keys():
                    for prop in o.data.keys():
                        row = box.row()
                        row.prop(o.data, '["' + prop + '"]', slider=True)
                else:
                    row = box.row()
                    row.label(text=o.name + " has no CP for data")
            
            elif o.type == "ARMATURE":
                armature = bpy.data.armatures[o.name]
                if armature.keys():
                    for prop in armature.keys():
                        row = box.row()
                        row.prop(armature, '["' + prop + '"]', slider=True)
                else:
                    row = box.row()
                    row.label(text=o.name + " has no custom properties")

def register():
    bpy.utils.register_module(__name__)

    bpy.types.Scene.custom_props_objects = []
    
def unregister():
    bpy.utils.unregister_module(__name__)

    
    del bpy.types.Scene.custom_props_objects
    

if __name__ == "__main__":
    register()