/usr/share/kivy-examples/canvas/lines.py is in python-kivy-examples 1.8.0+dfsg-2.1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 | from kivy.app import App
from kivy.properties import OptionProperty, NumericProperty, ListProperty, \
BooleanProperty
from kivy.uix.floatlayout import FloatLayout
from kivy.lang import Builder
from kivy.clock import Clock
from math import cos, sin
Builder.load_string('''
<LinePlayground>:
canvas:
Color:
rgba: .4, .4, 1, root.alpha
Line:
points: self.points
joint: self.joint
cap: self.cap
width: self.linewidth
close: self.close
Color:
rgba: .8, .8, .8, root.alpha_controlline
Line:
points: self.points
close: self.close
Color:
rgba: 1, .4, .4, root.alpha
Line:
points: self.points2
joint: self.joint
cap: self.cap
width: self.linewidth
close: self.close
GridLayout:
cols: 2
size_hint: 1, None
height: 44 * 5
GridLayout:
cols: 2
Label:
text: 'Alpha'
Slider:
value: root.alpha
on_value: root.alpha = float(args[1])
min: 0.
max: 1.
Label:
text: 'Alpha Control Line'
Slider:
value: root.alpha_controlline
on_value: root.alpha_controlline = float(args[1])
min: 0.
max: 1.
Label:
text: 'Width'
Slider:
value: root.linewidth
on_value: root.linewidth = args[1]
min: 1
max: 40
Label:
text: 'Cap'
GridLayout:
rows: 1
ToggleButton:
group: 'cap'
text: 'none'
on_press: root.cap = self.text
ToggleButton:
group: 'cap'
text: 'round'
on_press: root.cap = self.text
ToggleButton:
group: 'cap'
text: 'square'
on_press: root.cap = self.text
Label:
text: 'Joint'
GridLayout:
rows: 1
ToggleButton:
group: 'joint'
text: 'none'
on_press: root.joint = self.text
ToggleButton:
group: 'joint'
text: 'round'
on_press: root.joint = self.text
ToggleButton:
group: 'joint'
text: 'miter'
on_press: root.joint = self.text
ToggleButton:
group: 'joint'
text: 'bevel'
on_press: root.joint = self.text
Label:
text: 'Close'
ToggleButton:
text: 'Close line'
on_press: root.close = self.state == 'down'
AnchorLayout:
GridLayout:
cols: 1
size_hint: None, None
size: self.minimum_size
ToggleButton:
size_hint: None, None
size: 100, 44
text: 'Animate'
on_state: root.animate(self.state == 'down')
Button:
size_hint: None, None
size: 100, 44
text: 'Clear'
on_press: root.points = root.points2 = []
''')
class LinePlayground(FloatLayout):
alpha_controlline = NumericProperty(1.0)
alpha = NumericProperty(0.5)
close = BooleanProperty(False)
points = ListProperty([500, 500, 300, 300, 500, 300, 500, 400, 600, 400])
points2 = ListProperty([])
joint = OptionProperty('none', options=('round', 'miter', 'bevel', 'none'))
cap = OptionProperty('none', options=('round', 'square', 'none'))
linewidth = NumericProperty(10.0)
dt = NumericProperty(0)
def on_touch_down(self, touch):
if super(LinePlayground, self).on_touch_down(touch):
return True
touch.grab(self)
self.points = self.points + list(touch.pos)
return True
def on_touch_move(self, touch):
if touch.grab_current is self:
self.points[-2:] = list(touch.pos)
return True
return super(LinePlayground, self).on_touch_move(touch)
def on_touch_up(self, touch):
if touch.grab_current is self:
touch.ungrab(self)
return True
return super(LinePlayground, self).on_touch_up(touch)
def animate(self, do_animation):
if do_animation:
Clock.schedule_interval(self.update_points_animation, 0)
else:
Clock.unschedule(self.update_points_animation)
def update_points_animation(self, dt):
cy = self.height * 0.6
cx = self.width * 0.1
w = self.width * 0.8
step = 20
points = []
points2 = []
self.dt += dt
for i in range(int(w / step)):
x = i * step
points.append(cx + x)
points.append(cy + cos(x / w * 8. + self.dt) * self.height * 0.2)
points2.append(cx + x)
points2.append(cy + sin(x / w * 8. + self.dt) * self.height * 0.2)
self.points = points
self.points2 = points2
class TestLineApp(App):
def build(self):
return LinePlayground()
if __name__ == '__main__':
TestLineApp().run()
|