python-kivy-examples 1.9.1-1build3 / usr / share / kivy-examples / demo / touchtracer / main.py

This file is indexed.

/usr/share/kivy-examples/demo/touchtracer/main.py is in python-kivy-examples 1.9.1-1build3.

This file is owned by root:root, with mode 0o755.

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
'''
Touch Tracer Line Drawing Demonstration
=======================================

This demonstrates tracking each touch registered to a device. You should
see a basic background image. When you press and hold the mouse, you
should see cross-hairs with the coordinates written next to them. As
you drag, it leaves a trail. Additional information, like pressure,
will be shown if they are in your device's touch.profile.

This program specifies an icon, the file icon.png, in its App subclass.
It also uses the particle.png file as the source for drawing the trails which
are white on transparent. The file touchtracer.kv describes the application.

The file android.txt is used to package the application for use with the
Kivy Launcher Android application. For Android devices, you can
copy/paste this directory into /sdcard/kivy/touchtracer on your Android device.

'''
__version__ = '1.0'

import kivy
kivy.require('1.0.6')

from kivy.app import App
from kivy.uix.floatlayout import FloatLayout
from kivy.uix.label import Label
from kivy.graphics import Color, Rectangle, Point, GraphicException
from random import random
from math import sqrt


def calculate_points(x1, y1, x2, y2, steps=5):
    dx = x2 - x1
    dy = y2 - y1
    dist = sqrt(dx * dx + dy * dy)
    if dist < steps:
        return None
    o = []
    m = dist / steps
    for i in range(1, int(m)):
        mi = i / m
        lastx = x1 + dx * mi
        lasty = y1 + dy * mi
        o.extend([lastx, lasty])
    return o


class Touchtracer(FloatLayout):

    def on_touch_down(self, touch):
        win = self.get_parent_window()
        ud = touch.ud
        ud['group'] = g = str(touch.uid)
        pointsize = 5
        if 'pressure' in touch.profile:
            ud['pressure'] = touch.pressure
            pointsize = (touch.pressure * 100000) ** 2
        ud['color'] = random()

        with self.canvas:
            Color(ud['color'], 1, 1, mode='hsv', group=g)
            ud['lines'] = [
                Rectangle(pos=(touch.x, 0), size=(1, win.height), group=g),
                Rectangle(pos=(0, touch.y), size=(win.width, 1), group=g),
                Point(points=(touch.x, touch.y), source='particle.png',
                      pointsize=pointsize, group=g)]

        ud['label'] = Label(size_hint=(None, None))
        self.update_touch_label(ud['label'], touch)
        self.add_widget(ud['label'])
        touch.grab(self)
        return True

    def on_touch_move(self, touch):
        if touch.grab_current is not self:
            return
        ud = touch.ud
        ud['lines'][0].pos = touch.x, 0
        ud['lines'][1].pos = 0, touch.y

        index = -1

        while True:
            try:
                points = ud['lines'][index].points
                oldx, oldy = points[-2], points[-1]
                break
            except:
                index -= 1

        points = calculate_points(oldx, oldy, touch.x, touch.y)

        # if pressure changed create a new point instruction
        if 'pressure' in ud:
            if not .95 < (touch.pressure / ud['pressure']) < 1.05:
                g = ud['group']
                pointsize = (touch.pressure * 100000) ** 2
                with self.canvas:
                    Color(ud['color'], 1, 1, mode='hsv', group=g)
                    ud['lines'].append(
                        Point(points=(), source='particle.png',
                              pointsize=pointsize, group=g))

        if points:
            try:
                lp = ud['lines'][-1].add_point
                for idx in range(0, len(points), 2):
                    lp(points[idx], points[idx + 1])
            except GraphicException:
                pass

        ud['label'].pos = touch.pos
        import time
        t = int(time.time())
        if t not in ud:
            ud[t] = 1
        else:
            ud[t] += 1
        self.update_touch_label(ud['label'], touch)

    def on_touch_up(self, touch):
        if touch.grab_current is not self:
            return
        touch.ungrab(self)
        ud = touch.ud
        self.canvas.remove_group(ud['group'])
        self.remove_widget(ud['label'])

    def update_touch_label(self, label, touch):
        label.text = 'ID: %s\nPos: (%d, %d)\nClass: %s' % (
            touch.id, touch.x, touch.y, touch.__class__.__name__)
        label.texture_update()
        label.pos = touch.pos
        label.size = label.texture_size[0] + 20, label.texture_size[1] + 20


class TouchtracerApp(App):
    title = 'Touchtracer'
    icon = 'icon.png'

    def build(self):
        return Touchtracer()

    def on_pause(self):
        return True

if __name__ == '__main__':
    TouchtracerApp().run()

APT Browse - Built by Thomas Orozco.