Speed and Feed Calculator

import hal
import glib
import time
import math

debug = 1

class HandlerClass:

  def on_calc_sfm_clicked(self, widget, data=None):
    self.sfm = float(self.builder.get_object('entry_sfm').get_text())
    self.diameter = float(self.builder.get_object('entry_diameter').get_text())
    self.rpm = str(int(self.sfm * (12/math.pi) / self.diameter))
    self.builder.get_object('label_rpm').set_text(self.rpm)

  def __init__(self, halcomp,builder,useropts):
    self.halcomp = halcomp
    self.builder = builder
    self.nhits = 0

def get_handlers(halcomp,builder,useropts):
  return [HandlerClass(halcomp,builder,useropts)]

# add GladeVCP panel as a tab next to Preview/DRO:
EMBED_TAB_NAME=GladeVCP demo
EMBED_TAB_COMMAND=halcmd loadusr -Wn gladevcp gladevcp -c gladevcp -u calc.py -x {XID} calc.glade