import gtk
import cairo
import array
#import goocanvas
import weakref
import gc

def fini(foo):
    print "data is no more", foo

def create_stipple():
    color = gtk.gdk.color_parse ("mediumseagreen")
    
    stipple_data = array.array('B', [0, 0, 0, 255,   0, 0, 0, 0,
                                     0, 0, 0, 0,   0, 0, 0, 255])
    
    stipple_data[2] = stipple_data[14] = color.red >> 8
    stipple_data[1] = stipple_data[13] = color.green >> 8
    stipple_data[0] = stipple_data[12] = color.blue >> 8

    print stipple_data.tolist()

    surface = cairo.ImageSurface.create_for_data (stipple_data,
                                                  cairo.FORMAT_ARGB32,
                                                  2, 2, 8)
    pattern = cairo.SurfacePattern(surface)
    pattern.set_extend (cairo.EXTEND_REPEAT)

    data = weakref.ref(stipple_data, fini)
    
    return pattern

# w = gtk.Window()
# w.connect("destroy", gtk.main_quit)

# c = goocanvas.Canvas(automatic_bounds = True,
# 		     bounds_from_origin = False,
# 		     bounds_padding = 4.0,
# 		     background_color_rgb = 0xC3C3FF)

print "Creating pattern"
pattern = create_stipple()
print "Pattern created"

print "Deleting pattern"
del pattern
while gc.collect():
    pass
print "Pattern deleted"

# root = c.get_root_item()

# r = goocanvas.Rect(parent = root,
#                    x = 90,
#                    y = 40,
#                    width =  90,
#                    height =  60,
#                    fill_pattern = pattern,
#                    stroke_color = "black",
#                    line_width = 4.0)

# w.add(c)

# w.show_all()

# gtk.main()