Dynamic Menu/Listbox or load external list in Menu/Listbox/Something

Coding Python Support
1

I try without success to create an operator that load from an external list some data end use it in the interface.

After some research I came with this script.
Add > Dynamic Menu , then in Toolbar appears two listbox.

The BIG problem is that can’t select any voice in the second listbox, and I don’t get any error on the console

Below the script: to make it work you must have a folder named object and change “scriptPath” to point that. Here the contents of object folder.

Fruit.py


print("EXEC PRESET Fruit
")
props.do_list = ("apple","Apple",""),("pear","Pear",""),("orange","Orange","")

Vegetables.py


print("EXEC PRESET Vegetables
")
props.do_list = ("tomato","Tomato",""),("salad","Salad",""),("carrot","Carrot","")

How to make it work? If someone have any idea please, let me know.


import os, sys
os.system("cls") # clear console screen

import bpy
from bpy.props import *


def getPresets():
    scriptPath = "C:\Documents and Settings\XXXXXXXX\Desktop" #os.path.dirname(__file__)
    print(scriptPath)
    presetPath = os.path.join(scriptPath, "objects")
    print(presetPath)
    presetFiles = os.listdir(presetPath)
    #presetFiles.sort()
    presets = [(presetFile, presetFile.rpartition(".")[0], presetFile)
                for i, presetFile in enumerate(presetFiles) if presetFile.endswith(".py")]

    #print(presets)
    return presets, presetPath


def setProps(props, preset, presetsPath):
    #bpy.ops.script.python_file_run(filepath=presetsPath + '\\' + preset)
    file = open(os.path.join(presetsPath, preset))
    for line in file:
        exec(line)
    file.close()
    return

class add_mesh_dynobj(bpy.types.Operator):
    bl_idname = "mesh.dynobj_add"
    bl_label = "Add Objects"
    bl_options = {'REGISTER', 'UNDO'}
    bl_description = "add something"
    
    presets, presetsPath = getPresets()
    
    print(presets)
    print(presetsPath)

    first = presets[0]
    first_preset = first[0]
    
    do_presets = EnumProperty(attr='do_presets',
            name='Type',
            description="Type",
            default=first_preset,
            items=presets)
    
    last_preset = None
    last_part = None

    def update(self):
        print("UPDATING...")
        sce = bpy.types.Scene
        if True:
            print("UPDATE PART LIST...")
            tmp=self.do_list[0]
            first=tmp[1]
            print(first)
            sce.do_parts = EnumProperty(
                    name="Subtype",
                    description="Subtype",
                    items=self.do_list)
            self.last_part = sce.do_parts
    
    def draw(self, context):
        print("DRAW INTERFACE...
")
        layout = self.layout
        col = layout.column()
        sce = bpy.context.scene
        
        col.prop(self, 'do_presets')
        col.separator()
        col.prop(sce, 'do_parts')

    def execute(self, context):
    
        print('EXECUTING...')
        print(str(self.do_presets)+"="+str(self.last_preset))
        if not self.last_preset or self.do_presets != self.last_preset:
            print('setting Preset', self.do_presets)
            setProps(self, self.do_presets, self.presetsPath)
            self.last_preset = self.do_presets
            print(self.do_list)
        self.update()
        return {'FINISHED'}
        
    def invoke(self, context, event):
        print('
___________START_____________')
        self.execute(context)
        return {'FINISHED'}

def add_mesh_dynobj_button(self, context):
    self.layout.operator(add_mesh_dynobj.bl_idname, text="Dynamic Menu", icon="PLUGIN")

def register():
    bpy.utils.register_module(__name__)
    bpy.types.INFO_MT_mesh_add.append(add_mesh_dynobj_button)

def unregister():
    bpy.utils.unregister_module(__name__)
    bpy.types.INFO_MT_mesh_add.remove(add_mesh_dynobj_button)
    
if __name__ == "__main__":
    register()
2

Odd…my guess is that you are actually defining the enum in the update. It should be defined outside the update, right?

3

intersting way to getting data

did you succeed to make it work?

hope it does work fine

thanks happy 2.5

4

Thank you for your interest, but maybe I didn’t explain it well… but just for information it DOESN’T work.

This is what I want to do:

  • I would like to list or show in menu some categories (in my script are preset filename)
  • categories are limitless, just add a file in the folder and then a new category appears
  • any category has items, they are in external files so I can add them easily
  • when i pick up a category i get a list of all the items in it

The script seems to work but I can’t select a value in the second listbox.

@Atom if I define outside the update the enum property doesn’t update…

This script is made from paste and copy other code snippets/examples/addon found in the internet. But I didn’t actually fully understood how to make a working dynamic list/menu.

If anyone has an idea how to do that, pleeeease let me know.