#!/usr/bin/env python
def event_handler(evt):
	code = evt.get_code()

	   if code == lv.EVENT.CLICKED:
		   print("Clicked event seen")
	   elif code == lv.EVENT.VALUE_CHANGED:
			   print("Value changed seen")

# create a simple button
			   btn1 = lv.btn(lv.scr_act())

# attach the callback
					  btn1.add_event_cb(event_handler, lv.EVENT.ALL, None)

					  btn1.align(lv.ALIGN.CENTER, 0, -40)
					  label = lv.label(btn1)
							  label.set_text("Button")

# create a toggle button
							  btn2 = lv.btn(lv.scr_act())

# attach the callback
#btn2.add_event_cb(event_handler,lv.EVENT.VALUE_CHANGED,None)
									 btn2.add_event_cb(event_handler, lv.EVENT.ALL, None)

									 btn2.align(lv.ALIGN.CENTER, 0, 40)
									 btn2.add_flag(lv.obj.FLAG.CHECKABLE)
									 btn2.set_height(lv.SIZE.CONTENT)

									 label = lv.label(btn2)
											 label.set_text("Toggle")
											 label.center()
