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virtualjoystick.py
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virtualjoystick.py
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from kivy.app import App
from kivy.uix.widget import Widget
from kivy.graphics import Rectangle
from kivy.uix.gridlayout import GridLayout
from math import sqrt
class VirtualJoystick(Widget):
stickpos = [0,0]
def __init__(self, **kwargs):
super(VirtualJoystick, self).__init__(**kwargs)
self.size_hint = [None,None]
self.bind(pos=self.redraw)
self.bind(size=self.redraw)
self.redraw()
def redraw(self, *args):
self.canvas.clear()
with self.canvas:
Rectangle(pos=self.pos, size=self.size,
source = 'joy_bg.png')
Rectangle(pos=[(i/4*j)+z+i/4 for i,j,z in
zip(self.size, self.stickpos, self.pos)],
size=[i/2 for i in self.size],
source = 'joy_fg.png')
def on_touch_down(self, touch):
if self.collide_point(*touch.pos):
touch.grab(self)
def on_touch_move(self, touch):
if touch.grab_current is self:
position = []
position.append(((touch.x - self.x)/self.width-0.5)*4)
position.append(((touch.y - self.y)/self.height-0.5)*4)
mag = sqrt(sum([x**2 for x in position]))
if mag > 1:
self.stickpos = [(x/mag) for x in position]
else:
self.stickpos = [x for x in position]
self.redraw()
def on_touch_up(self, touch):
if touch.grab_current is self:
self.stickpos = [0,0]
self.redraw()
class TestApp(App):
def build(self):
layout = GridLayout(rows=2, cols=2)
layout.add_widget(VirtualJoystick())
layout.add_widget(VirtualJoystick())
layout.add_widget(VirtualJoystick())
layout.add_widget(VirtualJoystick())
return layout
if __name__ == '__main__':
TestApp().run()