Kivy draw on a widget

Kivy draw on a widget

I am new to Kivy and after I have done the tutorials my next step was to
add the two tutorial's widgets in one application. The class CombWidget
will be my Widget to which the Paint and PingPong widgets will bne added
to. For an intermediate step a BoxLayout was added and
a few Buttons
MyPaintWidget
in the BoxLayout.
To restrict the drawing only to MyPaintWidget a if statement was added
def on_touch_move(self, touch):
if self.collide_point(touch.x, touch.y):
touch.ud['line'].points += [touch.x, touch.y]
The line are drawn only to a small spot just above the buttons. The dot
are draw everywhere except on the Buttons. The Buttons also don't react to
clicks any more.
The code:
from random import random
from kivy.app import App
from kivy.graphics import Color, Ellipse, Line
from kivy.uix.button import Button
from kivy.uix.widget import Widget
class CombWidget(Widget):
pass
class MyPaintWidget(Widget):
def on_touch_down(self, touch):
color = (random(), 1, 1)
with self.canvas:
Color(*color, mode='hsv')
d = 30.
Ellipse(pos=(touch.x - d / 2, touch.y - d / 2), size=(d, d))
touch.ud['line'] = Line(points=(touch.x, touch.y))
def on_touch_move(self, touch):
if self.collide_point(touch.x, touch.y):
touch.ud['line'].points += [touch.x, touch.y]
class MyPaintApp(App):
def build(self):
return CombWidget()
if __name__ == '__main__':
MyPaintApp().run()
and the layout file:
#:kivy 1.7.0
<CombWidget>:
BoxLayout:
orientation: 'vertical'
padding: 20
spacing: 50
MyPaintWidget:
size: 100000, 100000
size_hint: 100000, 100000
Button:
text: "Hallo"
Button:
text: "Hallo 1"
Button:
text: "Hallo 2"
To increase the size of MyPaintWidget I used the size: and size_hint:
parameters in the kv file but not success.
Can anybody help met to increase the size of MyPaintWidget so that that
area behaves just like the MyPaintyApp the in tutorial. Also why does my
buttons show when you click on them.
Regards