testing touch events

Test.kv

#:kivy 1.0
#:import kivy kivy
#:import win kivy.core.window

<cont>:
  but: but
	FloatLayout:
		size:(600,600)
		
		Button:
			id:but
			text: 'My first' + str(root.info)
			size_hint:.2,.2
			
			pos:(200,200)
			background_color:[.5,.8,.2,1]
			foreground_color:[.4,.4,.8,.8]
			font_size:18
			
		

test.py

from kivy.app import App
from kivy.uix.widget import Widget
from kivy.uix.image import Image
from kivy.input.motionevent import MotionEvent

from kivy.uix.scatter import Scatter
from kivy.uix.button import Button

from kivy.uix.boxlayout import BoxLayout
from kivy.uix.floatlayout import FloatLayout
from kivy.properties import StringProperty, ObjectProperty

class TestApp(App):
	title = 'HELLO World'
	def build(self):
		#self.r = cont()
		#self.root = self.r
		return cont(app=self)

class cont(Widget):

	but = ObjectProperty(None)
	info=StringProperty(None)
	app = ObjectProperty(None)
	double_tap_status = False
	
	
		
	
	def on_touch_down(self, touch):
		
		if self.but.collide_point(*touch.pos):
			if touch.is_double_tap:
				print self.double_tap_status,touch.double_tap_time
				if (touch.double_tap_time <0.5):
					self.double_tap_status = True
			touch.double_tap_time = 0.0
			touch.grab(self)
	
	def on_touch_move(self, touch):
		if touch.grab_current is self:
			print self.double_tap_status
			if self.double_tap_status==True:
				print touch.x,touch.y
			else:
				print touch.profile
				print touch.x,touch.y,touch.ud
				self.but.pos = (touch.x,touch.y)
				self.but.background_color=[.5,.8,.2,.4]
		else:
			pass

	def on_touch_up(self, touch):
		if touch.grab_current is self:
        # i receive my grabbed touch, i must ungrab it !
			print 'leave'
			
			#touch.double_tap_time = 0.0
			self.but.background_color=[.5,.8,.2,1]
			touch.ungrab(self)
		else:
        # it's a normal touch
			pass
		self.double_tap_status=False
	
if __name__ == '__main__':
	TestApp().run()