Tool Observer method onToolStateChanged invoke twice

Developers Ruby API
1

I am using a simple observer for tools. Code below.

I noticed that when I move object method invoked 3 times.
1 time when I grab the object
2 times when I leave an object.

Unfortunately, the 2 times when I leave the object I have tool_state == 0 so I have no idea how I can recognize that 'one time

My task is to run a function of everything when the user ‘leaves’ the grabbed object. Would be nice to avoid static/classes/global variables to do this. Any thoughts?

At first, I thought that I added observer twice, but the grabbing object invoke only once (tool_state == 1)


class MyToolsObserver < Sketchup::ToolsObserver

  def onActiveToolChanged(tools, tool_name, tool_id)
    puts "onActiveToolChanged: #{tool_name}"
  end

  def onToolStateChanged(tools, tool_name, tool_id, tool_state)
    puts "onToolStateChanged: #{tool_id} - #{tool_name}:#{tool_state}"
 end

end
2

I think I found a way by using the previous state tool:
Used a object variable
Maybe somebody will search that in future

Here is updated code:

class MyToolsObserver < Sketchup::ToolsObserver

  attr_accessor :last_state

  def onActiveToolChanged(tools, tool_name, tool_id)
    puts "onActiveToolChanged: #{tool_name}"
  end

  def onToolStateChanged(tools, tool_name, tool_id, tool_state)
    puts "onToolStateChanged: #{tool_id} - #{tool_name}:#{tool_state}"

    if tool_id == 21048 && tool_state == 0 && @last_state == 1
      logic_code()
      puts "INVOKE MOVE TOOL"
    end

    @last_state = tool_state
 end

end
3

Needing to keep track of state is quite common with the SketchUp API.

It is actually an instance variable.

Please read the open issue in the API Issue tracker:

Also read about the v2016 Observer overhaul:

4

thanks for all the extra info!

Please read the open issue in the API Issue tracker:

oh yea, new methods for observers would be nice!