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#!/usr/bin/env python
# Copyright (C) 2011, One Laptop Per Child
# Author, Gonzalo Odiard <gonzalo@laptop.org>
# Translated from c demo provided by Carlos Garnacho <carlos@lanedo.com>
from gi.repository import Gtk
from gi.repository import Gdk
import math
class TestTouch(Gtk.DrawingArea):
def __init__(self):
self.touches = {}
super(TestTouch, self).__init__()
self.set_events(Gdk.EventMask.TOUCH_MASK)
self.connect('draw', self.__draw_cb)
self.connect('event', self.__event_cb)
def __event_cb(self, widget, event):
if event.type in (Gdk.EventType.TOUCH_BEGIN,
Gdk.EventType.TOUCH_CANCEL, Gdk.EventType.TOUCH_END,
Gdk.EventType.TOUCH_UPDATE):
x = event.touch.x
y = event.touch.y
seq = str(event.touch.sequence)
if event.type in (Gdk.EventType.TOUCH_BEGIN,
Gdk.EventType.TOUCH_UPDATE):
self.touches[seq] = (x, y)
elif event.type == Gdk.EventType.TOUCH_END:
del self.touches[seq]
self.queue_draw()
def __draw_cb(self, widget, ctx):
ctx.set_source_rgba(0.3, 0.3, 0.3, 0.7)
for touch in self.touches.values():
x, y = touch
ctx.save()
ctx.arc(x, y, 60, 0., 2 * math.pi)
ctx.fill()
ctx.restore()
def main():
window = Gtk.Window()
test_touch = TestTouch()
window.add(test_touch)
window.connect("destroy", Gtk.main_quit)
window.show_all()
window.maximize()
Gtk.main()
if __name__ == "__main__":
main()
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