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#!/usr/bin/env python
# Copyright (C) 2011, One Laptop Per Child
# Author, Manuel Kaufmann <humitos@gmail.com>
import moosegesture
from gi.repository import Gtk
from gi.repository import Gdk
LENGHT = 100
DIRECTIONS = {
1: (-1, 1),
2: (0, 1),
3: (1, 1),
4: (-1, 0),
7: (-1, -1),
8: (0, -1),
9: (1, -1),
6: (1, 0),
}
class TouchWidget(Gtk.DrawingArea):
def __init__(self):
self.touches = {}
self.gesture = []
super(TouchWidget, 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):
if seq in self.touches:
self.touches[seq].append((x, y))
else:
self.touches[seq] = [(x, y)]
elif event.type == Gdk.EventType.TOUCH_END:
self.gesture = moosegesture.getGesture(self.touches[seq])
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)
allocation = self.get_allocation()
ctx.save()
ctx.set_line_width(10)
ctx.move_to(allocation.width / 2, allocation.height / 2)
for direction in self.gesture:
x, y = DIRECTIONS[direction]
ctx.rel_line_to(x * LENGHT, y * LENGHT)
ctx.stroke()
ctx.restore()
self.gesture = []
def main():
window = Gtk.Window()
test_touch = TouchWidget()
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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