[Code] Tracking Models during a Ruby session

thomthom

( Split from: [Code] Scarpino's SphereTool Sample ver 2.1.0 )

I've been using similar methods of keeping track of tools vs models in order to allow OSX to have the tool active for multiple models. However, I found problems with the Model class. I seemed to experience getting different Model objects during the same session. So when I tried to look up a tool for a given model it would fail. I also tried with model.guid, but that also changes. I think my current version use a combination of Model and model.guid.

It's been a while since I last looked at that issue. I'll see if I can dig up some notes on the specifics.

Dan Rathbun

Yes I do know that guid can change if the model is modified and saved.

On PC.. Sketchup.active_model.object_id stays the same, even if the model is modified, saved, modified more, saved as a different filename.
The object_id remains the same, until a new model is opened, or a modelfile is opened from disk.

The PC is the easiest of the 2, to handle.

driven

I found that Sketchup.active_model.definitions.object_id() was the most robust identifier on mac. see apple_pudding.

thomthom

@dan rathbun said:

On PC.. Sketchup.active_model.object_id stays the same, even if the model is modified, saved, modified more, saved as a different filename.
But model.object_id reflects the Model object, right? if I'm getting a different Model object, for the same model, then surely model.object_id will be different as well?

@driven said:

I found that Sketchup.active_model.definitions.object_id() was the most robust identifier on mac. see apple_pudding.

That's interesting.

driven

@thomthom said:

@driven said:

I found that Sketchup.active_model.definitions.object_id() was the most robust identifier on mac. see apple_pudding.

That's interesting.

It works with multiple unsaved windows, where everything else appears to fail. It also copes if I run a second instance of SU, even if it's the same version, which access's the same folders.

Dan Rathbun

@thomthom said:

@dan rathbun said:

On PC.. Sketchup.active_model.object_id stays the same, even if the model is modified, saved, modified more, saved as a different filename.
But model.object_id reflects the Model object, right?

YES

@thomthom said:

if I'm getting a different Model object, for the same model, then surely model.object_id will be different as well?

YES

OK ThomThom, I see what you mean. The model object (incl. object_id,) will change, before it's saved, after it's modified, BUT not immediately !! Seems like, after modifying, it stays the same, until you change the active tool. Kind of like the C-side is doing things in a batch way.

This is annoying.

Dan Rathbun

OK there is two approaches to try. Presbyterian (top down,) and Congregational (bottom up.)

The Presbyterian, ie, keeping track of models, and assigning a tool instance to each model, seems to not work. (At least as simply as we wish it to.)
I've noticed some behavior, that John eludes to. That is that behind the scenes, when the app thinks it needed, it creates a new model object, but transfers, or copies, things over to the new object. The entities object is one I noticed. On PC, when you open a new empty model, calling methods against the old model object, returns child objects of the new model object.

Anyway.. I am going to think about doing it the opposite way around, always creating one tool instance, and having that instance check what the active_model is before doing anything.. like whenever a click state changes, etc.

John... have you tested what happens in tools when you switch model document windows ?
Does deactivate() or suspend() get called in the "from" tool, and activate() or resume(), in the model switched to?

Dan Rathbun

I suppose the "easy" way is to just reset the tool and all it's variables, if the active model changes at all.

I can't really see keeping a database of all the tool's instance variables, for each model. (ie an Array of Hashes) That's just too much.

I am leaning back towards my original thinking... the Tool class is best implemented as a singleton class, AND when the active model changes, just reset the tool and all it's variables. Then notify users they can't switch horses in midstream.

driven

the post notifications are bad today... just came back by chance and there 4 new posts, I've had no notifications...

when I was looking at how you might track tool usage, across models in the same session, the only reliable method was to assign a unique id and save it to file. I thought I'd posted the WIP script, but maybe I just Pm'd a couple of mac user's for testing.

#####################################################################
##
#  Apple Pudding      Wed Jan 11 00;12;31 +0000 2012
#
##      
#####################################################################
# load("/Library/Application Support/Google SketchUp 8/SketchUp/plugins/apple_pudding_proof.rb")
require('sketchup.rb')  # d/s restricts access to SU only calls
#Sketchup.send_action("openRubyConsole;")
#module JcB    # later dan...
def proof      # just type proof after loading
#---------------------------------------------------------------------
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
#--------------------------------------------------------------------
begin
path = "/tmp/" 
# our Directory current_path? If not make one.
cacheDir = "/tmp/macSUcache"  # is CLEARED after a system Shut Down not Restart which is all I normally do.
if not File.exists? cacheDir 
then   Dir.mkdir(path + 'macSUcache')
end 
#check
    puts "current path is; " + cacheDir.to_s 
    puts "cacheDir " + "is a " + defined? cacheDir 
rescue
    puts "what now???"
else
    puts "Congratulations  no errors!"
end
#--------------------------------------------------------------------
##
begin
unique_Id =(cacheDir + "/" + current_title.to_s + "_su.txt")
#check
    puts "this models cache ID; " + unique_Id.to_s    
    puts "unique_Id " + "is a " + defined? unique_Id 
rescue
    puts "again?...what now???"
else
    puts "Congratulations  no errors!"
end
#--------------------------------------------------------------------
## Proof
#######################################################################
begin
# Create/open a current model file in read-write [adds new to end of existing] mode, use "w" for over-writing 
f = File.open unique_Id, "a+"  
#
# Write an array of Strings to the file 
nums = [["\n"] + [Time.now] + ["", "", "", "", "", ""].sort_by { rand }]
f.puts  nums
#check
  #  puts "the File; " + unique_Id.to_s + " is now open? " + File.exists?(unique_Id).to_s
    puts "f " + "is a " + defined? f 
rescue
    puts "again?...what now???"
else
    puts "Congratulations  no errors!"
#should return true   is now writen
#
##
# Rewind the file, read its lines, and print the third line
# #
# 
f.rewind 
f.readlines.join  
ensure
  f.close unless f.nil?
#check
 puts "Congratulations  no errors!"
 puts "this File; " + unique_Id.to_s + " now closed? " + f.closed?.to_s 
 end #begin
 end #def
##############################################################################
 ##--------------------------------------------------------------------------
# 
# # TODO; add a 'Clear This' method
# def clr_proof #
# # Delete the current model file 
# f = File.open unique_Id
# deleteCur = File.delete unique_Id
# puts "does tmp file for " + unique_Id.to_s + " still Exists? " + File.exists?(unique_Id).to_s 
# end #clr_proof
#
##
###############################################################
=begin
##
# purge all .su.txt files
#eraseSUtxt=(system "e- cd / \n rm -rf /tmp/macSUcache/*su.txt")
#eraseDir =(system "e- cd / \n rm -rf /tmp/macSUcache")
#eraseSUtxt
#eraseDir
##
################################################################
=end 

#end #def proof
#end #module
#--------------------------------------------------------------------

# file_loaded(File.basename(__FILE__))

#--------------------------------------------------------------------
#####################################################################

aside, when testing this code block, I had to double comment my system calls, as I couldn't copy/paste from this, without seeing errors in SU?

Dan Rathbun

Post concerning tool icons, moved back to parent thread.

dkendig

from Paul on the SketchUp Extensibility Team:

@unknownuser said:

Yes, I believe that would work fine. However, I recommend using the Entity member entityID instead, like this: Sketchup.active_model.definitions.entityID. This one also doesn't persist between sessions, but it is a unique index across all entities Sketchup has loaded (even with multiple models), and active_model.definitions is a SketchUp entity.

thomthom

That's interesting!

thomthom

@dkendig said:

from Paul on the SketchUp Extensibility Team:

@unknownuser said:

Yes, I believe that would work fine. However, I recommend using the Entity member entityID instead, like this: Sketchup.active_model.definitions.entityID. This one also doesn't persist between sessions, but it is a unique index across all entities Sketchup has loaded (even with multiple models), and active_model.definitions is a SketchUp entity.

So under OSX this returns a new integer for each model opened.
But under Windows it returns the same integer even if you open or create a new model. It appear to reuse the DefinitionList entity.

eneroth3

Any news on this topic? Can model specific states be safely indexed by the model object now or do we still need to use hacks such as using the DefinitionsList object id as index?