Combine multiple operation into one

Developers Ruby API
10

Perhaps you can follow this logic:

module Dezmo
module DezmoTest

class DezmoTestTool

  def initialize
    @in_transform = false
    @myselection = nil
  end
  
  def onCancel(reason, view)
    view.model.abort_operation if @in_transform
    @in_transform = false
  end
  
  def onLButtonDown( flags, x, y, view )
    if @in_transform
      commit_transform(view)
    else
      if @myselection
        start_transform( view, "My Rotation" )
      else
        # code for select the entities to rotate
        #   and set @myselection
      end
    end
  end
  
  def onMouseMove(flags, x, y, view)
    if @in_transform && @myselection
      # code for trasnform (rotate) the entities (@myselection)
    else
      # code for select the entities to rotate
      #   and set @myselection
    end
  end

  def start_transform( view, undo_text )
    @in_transform = true
    #view.model.start_operation(undo_text, true)
    # edited:
    view.model.start_operation(undo_text)
  end
  
  def commit_transform( view )
    @in_transform = false
    view.model.commit_operation
  end

end #tool

end #extension
end #namespace