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#!/usr/bin/env python
# clock_ex3.py
# a pygtk widget that implements a clock face
# porting of Davyd Madeley's
# http://www.gnome.org/~davyd/gnome-journal-cairo-article/clock-ex3.c
# author: Lawrence Oluyede <l.oluyede@gmail.com>
# date: 03 December 2005
import gtk
import math
class EggClockFace(gtk.DrawingArea):
def __init__(self):
super(EggClockFace, self).__init__()
self.connect("expose_event", self.expose)
def expose(self, widget, event):
context = widget.window.cairo_create()
# set a clip region for the expose event
context.rectangle(event.area.x, event.area.y,
event.area.width, event.area.height)
context.clip()
self.draw(context)
return False
def draw(self, context):
rect = self.get_allocation()
x = rect.x + rect.width / 2.0
y = rect.y + rect.height / 2.0
radius = min(rect.width / 2.0, rect.height / 2.0) - 5
# clock back
context.arc(x, y, radius, 0, 2.0 * math.pi)
context.set_source_rgb(1, 1, 1)
context.fill_preserve()
context.set_source_rgb(0, 0, 0)
context.stroke()
# clock ticks
for i in xrange(12):
context.save()
if i % 3 == 0:
inset = 0.2 * radius
else:
inset = 0.1 * radius
context.set_line_width(0.5 * context.get_line_width())
context.move_to(x + (radius - inset) * math.cos(i * math.pi / 6.0),
y + (radius - inset) * math.sin(i * math.pi / 6.0))
context.line_to(x + radius * math.cos(i * math.pi / 6.0),
y + radius * math.sin(i * math.pi / 6.0))
context.stroke()
context.restore()
def main():
window = gtk.Window()
clock = EggClockFace()
window.add(clock)
window.connect("destroy", gtk.main_quit)
window.show_all()
gtk.main()
if __name__ == "__main__":
main()
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