def __init__(self, plugin, screen, client):
self.plugin = plugin
self.client = client
self._obsolete = False
self._active = True
# This counter ensures that we don't run into
# an infinite loop. If the window is configured,
# we configure the actor. If the actor is configured,
# we configure the window --> much fun.
# Now, we increment the counter if we configure the
# window. The actor will only be configured if
# the counter equals 0. If it is greater than 0,
# it is simply decremented.
# Maybe that's not necessary, but it seems to be.
self._window_configures = 0
# create the cairo stuff
self.surface = create_surface(client.actor,
client.screen.info.get_root_visual_type())
self.cr = cairo.cairo_create(self.surface)
cairo.cairo_set_operator(self.cr, cairo.CAIRO_OPERATOR_SOURCE)
cairo.cairo_set_source_surface(self.cr, self.surface, 0, 0)
cairo.cairo_set_source_rgba(self.cr, 255, 0, 0, 0)
self.client.push_handlers(
on_focus=self.on_focus,
on_updated_geom=self.on_updated_geom,
on_blur=self.on_blur,
)
self.client.actor.push_handlers(
on_configure_notify=self.actor_on_configure_notify,
on_expose=self.on_expose,
on_button_press=self.on_button_press,
)
self.client.window.push_handlers(
on_property_notify=self.on_property_notify,
on_configure_notify=self.window_on_configure_notify,
on_unmap_notify=self.on_unmap_notify,
on_map_notify=self.on_map_notify,
)
# TODO: dirty. something's wrong with substructure and structure notify.
self.client.screen.root.push_handlers(
on_configure_notify=self.screen_on_configure_notify
)
self.redraw()
win = xproto.Window.create_toplevel_on_screen(conn, screen,
width=width, height=height,
back_pixel=screen.white_pixel,
event_mask=xproto.EventMask.Exposure | xproto.EventMask.ButtonPress
)
win.map()
# create a surface for this window
surface = cairo.cairo_xcb_surface_create(conn, win,
visualtype,
width, height)
# and a cairo context
cr = cairo.cairo_create(surface)
cairo.cairo_set_operator(cr, cairo.CAIRO_OPERATOR_SOURCE)
cairo.cairo_set_source_surface(cr, surface, 0, 0)
cairo.cairo_set_source_rgba(cr, 255, 0, 0, 0)
@win.event
def on_expose(event):
# paint a red rectangle when an expose event occurs
cairo.cairo_set_source_rgb(cr, 255, 0, 0)
cairo.cairo_rectangle(cr, 100, 100, 300, 300)
cairo.cairo_fill(cr)
# don't forget to flush!
conn.flush()
@win.event
def on_button_press(event):
global running
running = False