Help with acess to registry from observer

honoluludesktop

Sketchup.read_default fails to access the registry with the following code, and returns nil although I have verified that there is a value in v_name. Anyone care to discuss?

class AtelierModelObserver<Sketchup;;ModelObserver
  def onSaveModel(model) 
    result=Sketchup.read_default("label","v_name","default")
    if result==nil
      #undocumented PC only exit command.
      Sketchup.send_action 57602 
    end
  end
end

thomthom

result=Sketchup.read_default("label","v_name","default") This gives you nil?
You added the string "default" to the optional default value - which means it should return "default" if the value is not set.

How are you verifying that you have a value for v_name? What value is set in the registry? What ruby value type do you use to set the value?

honoluludesktop

In the first instance of Sketchup, the plugin writes to the register, and waits at a UI.messagebox midway. At this time, the second instance of sketchup, saves its model, calls the observer, to checks the register, but nil is returned. I use regedit to check the values in the register as I step through the program. In this case nil works for me, but I would like to know whats happening. Maybe one instance locks access to the register from the other? I am in the process of posting the plugin.

honoluludesktop

Plugin posted here.

thomthom

So what is the value you see in the register?
Does the register actually change as you use write_default ? Or is it delayed until SketchUp closes?

honoluludesktop

Regedit shows the write_default changes the register, but when read_default is placed in the observer, it returns nil.

Dan Rathbun

I believe I posted the 3rd argument bug for Sketchup.read_default() in the API topic. I have to check the beta bug list on this.

EDIT: YES.. I did report this bug ...

@dan rathbun said:

Any attempt to read a Registry DWORD value returns nil.
The 3rd argument is not returned on failure.

The bug was already listed in Google's buglist as number 2435419

Dan Rathbun

I bumped the bug report.

honoluludesktop

Good to know. In my case, I assumed that returning nil in that situation was a sign that the second instance of Sketchup was running. Guess I'll add or v_name==the_vari for when it gets fixed:-)

Dan Rathbun

There'a a major drawback to using the API "default" methods.
That is they did not give us a "remove_default" method.
This means the Win Registry or Mac plist can become cluttered with old 'orphaned' settings for plugins that are no longer used.

Many authors (TIG is one I think,) that instead write out their own settings file in the plugin subfolder. I think he has posted code snippets in other topic threads.

Basically you write out a string report of your settings Hash to a text file, using the inspect method.
To reload it, you read the file into a String object, and then eval() the string inside the context of your module, assigning it to a var, which should become type Hash after evaluation.