Mac Unique 'per model' ID: question

driven

hi all,

I'm creating unique id's for any models, including unsaved, using

su_Id = true

begin
#
model = Sketchup.active_model() 
su_Id = model.definitions.object_id()
has_title = model.title()
add_title = "Unsaved_" + su_Id.to_s
#
# First check if there's an active model name         
  if has_title.to_a.length == 1 then
    current_title = has_title
  else
   current_title = add_title
  end
rescue 
   # .. handle error
   #  UI.messagebox("You need an open .skp for this to work")
    puts "You need an open .skp for this to work"
else
#check
    puts "model name is; " + current_title.to_s
    ensure
    puts "current_title " + "is a " + defined? current_title 
    puts "Congratulations  no errors!"
end

It works very well, it inside in my module, but I want use it elsewhere and don't know which bit's need to be constants or def's to use in other sub-modules.

At this stage things go wrong when I try to wrap them.
john

Dan Rathbun

@driven said:

I'm creating unique id's for any models, including unsaved, using

su_Id = model.definitions.object_id()

object_id is a Ruby integer, that is only unique within a single session. It will be reused in the next session. (The possibility exists that you may get that integer assigned to another model, in another session.)

Sketchup already has a unique model numbering feature, that is automatically saved in the model.
see:
Model.guid()

It will change if you save the model, so you'll have to track the data under the old guid, and rekey it with the new guid after saving.
see ModelObserver#onPreSaveModel() and ModelObserver#onPostSaveModel()
.

Dan Rathbun

@driven said:

It works very well, .. but I want use it elsewhere and don't know which bit's need to be constants or def's to use in other sub-modules.

You want to write a library submodule, that can be used by all your various other plugin submodules.

module Driven

  module StatLib

    def self.libtask
      # method code here
    end # method def

  end # submodule Driven;;StatLib

end # module Driven

You would save the above file (as "statlib.rb" for example,) within your "driven" subdir, perhaps within a "lib" subsubdir.

Then in ANOTHER file, for a plugin perhaps:

require('driven/lib/statlib')

module Driven

  module NiftyPlugin

    public

    def self.some_module_method
      # call your lib method
      Driven;;StatLib.libtask
      # other code here
    end # method def

    class << self

      private

      def some_private_method( arg1, arg2 )
        # call your lib method
        Driven;;StatLib.libtask      
      end

    end # proxy class

  end # submodule Driven;;NiftyPlugin

end # module Driven

.. and you'd save this file in it's own plugin subdir of your "driven" dir.

You can create local vars, module vars, or constants that just point at another module, so you can give a short "nickname" to a long qualified, multi-nested module name:
Let's say there was some lib module, that had a class you wanted to use.
(This is a fictious example
SKX::Lib::GUI::DialogHelper::Lister

Inside your local namespace, you can create a "nickname to it:
` lister = SKX::Lib::GUI::DialogHelper::Lister

use the local pointer to call methods:

mylist = lister.new("List of Models")`

Dan Rathbun

Your other option is to write a special mixin module and then mixin it into your other submodules. This is a bit advanced.

Have you read the old "Pick-Axe" Ruby book ?

driven

@dan rathbun said:

Your other option is to write a special mixin module and then mixin it into your other submodules. This is a bit advanced.

I agree, but will have another look at your other links,

@unknownuser said:

Have you read the old "Pick-Axe" Ruby book ?

yes, and too many others, I've gone back to mainly using "Mr Neighborly's Humble Little Ruby Book" http://humblelittlerubybook.com/book/html/chapter1.html because it's 1.8.5 and most things work in mac SU.

thanks for the comments

john

driven

@dan rathbun said:

object_id is a Ruby integer, that is only unique within a single session. It will be reused in the next session. (The possibility exists that you may get that integer assigned to another model, in another session.

With this 'Untitled[0..-1] Sketchup' is always reports 'Unsaved_260629430_su.txt' until one of them is has been written to, then the number sequence randomizes.

If I 'Save' an 'Unsaved_260629430_su.txt' the full script will (eventually) update and re-name it's file.

I also have a cleanup sequence for closed unsaved models.

I'll try and wrap it all, and see how it goes.

john