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import xcb
from xcb.xproto import *
import xcb.render
def find_format(screen):
for d in screen.depths:
if d.depth == depth:
for v in d.visuals:
if v.visual == visual:
return v.format
raise Exception("Failed to find an appropriate Render pictformat!")
def startup():
white = setup.roots[0].white_pixel
conn.core.CreateWindow(depth, window, root,
0, 0, 640, 480, 0,
WindowClass.InputOutput,
visual,
CW.BackPixel | CW.EventMask,
[ white, EventMask.ButtonPress | EventMask.EnterWindow | EventMask.LeaveWindow | EventMask.Exposure ])
cookie = conn.render.QueryPictFormats()
reply = cookie.reply()
format = find_format(reply.screens[0])
name = 'X Python Binding Demo'
conn.core.ChangeProperty(PropMode.Replace, window, xcb.XA_WM_NAME, xcb.XA_STRING, 8, len(name), name)
conn.render.CreatePicture(pid, window, format, 0, [])
conn.core.MapWindow(window)
conn.flush()
def paint():
conn.core.ClearArea(False, window, 0, 0, 0, 0)
for x in xrange(0, 7):
for y in xrange(0, 5):
rectangle = ((x + 1) * 24 + x * 64, (y + 1) * 24 + y * 64, 64, 64)
color = (x * 65535 / 7, y * 65535 / 5, (x * y) * 65535 / 35, 65535)
conn.render.FillRectangles(xcb.render.PictOp.Src, pid, color, 1, rectangle)
conn.flush()
def run():
startup()
print 'Click in window to exit.'
while True:
try:
event = conn.wait_for_event()
except xcb.ProtocolException, error:
print "Protocol error %s received!" % error.__class__.__name__
break
except:
print "Unexpected error received: %s" % error.message
break
if isinstance(event, ExposeEvent):
paint()
elif isinstance(event, EnterNotifyEvent):
print 'Enter (%d, %d)' % (event.event_x, event.event_y)
elif isinstance(event, LeaveNotifyEvent):
print 'Leave (%d, %d)' % (event.event_x, event.event_y)
elif isinstance(event, ButtonPressEvent):
print 'Button %d down' % event.detail
break
conn.disconnect()
conn = xcb.connect()
conn.render = conn(xcb.render.key)
setup = conn.get_setup()
root = setup.roots[0].root
depth = setup.roots[0].root_depth
visual = setup.roots[0].root_visual
window = conn.generate_id()
pid = conn.generate_id()
run()
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