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xss-dimmer: be more precise with timer duration

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Vincent Bernat 2021-09-07 21:52:50 +02:00
parent 0106eddaff
commit cef1c1982b
1 changed files with 20 additions and 15 deletions
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31
bin/xss-dimmer
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@ -15,6 +15,7 @@ from gi.repository import Gtk, Gdk, GLib, GdkPixbuf
import cairo
import argparse
import threading
import time
from Xlib import display, X
from Xlib.error import BadWindow
from Xlib.protocol.event import MapNotify
@ -40,7 +41,7 @@ def on_realize(widget):
window.set_override_redirect(True)
def on_draw(widget, event, options, background, elapsed):
def on_draw(widget, event, options, background, start):
def _dim():
r = cairo.Region(cairo.RectangleInt(0, 0, *widget.get_size()))
dctx = window.begin_draw_frame(r)
@ -52,7 +53,8 @@ def on_draw(widget, event, options, background, elapsed):
x, y = widget.get_position()
wwidth, wheight = widget.get_size()
delta = options.end_opacity - options.start_opacity
current = elapsed[0] / options.delay
elapsed = time.monotonic() - start
current = elapsed / options.delay
opacity = delta * current + options.start_opacity
# Background
@ -70,31 +72,33 @@ def on_draw(widget, event, options, background, elapsed):
cctx.restore()
# Remaining time
remaining = str(round(options.delay - elapsed[0]))
cctx.set_source_rgba(1, 1, 1, opacity)
if elapsed >= options.delay:
return
remaining = str(round(options.delay - elapsed))
cctx.select_font_face(
options.font, cairo.FONT_SLANT_NORMAL, cairo.FONT_WEIGHT_BOLD
)
cctx.set_font_size(wheight // 4)
_, _, twidth, theight, _, _ = cctx.text_extents(remaining)
cctx.move_to(wwidth // 2 - twidth // 2, wheight // 2 + theight // 2)
text_position = wwidth // 2 - twidth // 2, wheight // 2 + theight // 2
cctx.move_to(*text_position)
cctx.set_source_rgba(1, 1, 1, opacity)
cctx.show_text(remaining)
cctx.move_to(*text_position)
cctx.set_source_rgba(0, 0, 0, opacity * 2)
cctx.move_to(wwidth // 2 - twidth // 2, wheight // 2 + theight // 2)
cctx.text_path(remaining)
cctx.set_line_width(4)
cctx.text_path(remaining)
cctx.stroke()
# Rearm timer
if not once:
elapsed[0] += options.step
if elapsed[0] <= options.delay:
GLib.timeout_add(options.step * 1000, _dim)
next_step = min(options.step, options.delay - elapsed)
on_draw.timer = GLib.timeout_add(next_step * 1000, _dim)
window = widget.get_window()
if not elapsed:
dim(event)
if not hasattr(on_draw, "timer"):
# First time we are called.
elapsed.append(0)
dim(event)
else:
# Timers already running, just repaint
@ -102,6 +106,7 @@ def on_draw(widget, event, options, background, elapsed):
if __name__ == "__main__":
now = time.monotonic()
parser = argparse.ArgumentParser()
add = parser.add_argument
add("--start-opacity", type=float, default=0, help="initial opacity")
@ -134,7 +139,7 @@ if __name__ == "__main__":
window.set_default_size(geom.width, geom.height)
window.move(geom.x, geom.y)
window.connect("draw", on_draw, options, background, [])
window.connect("draw", on_draw, options, background, now)
window.connect("delete-event", Gtk.main_quit)
window.connect("realize", on_realize)