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xss-dimmer: add easing functions

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Vincent Bernat 2021-09-29 06:56:08 +02:00
parent 639e4b25cc
commit dc6c2f05ff
1 changed files with 22 additions and 1 deletions
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23
bin/xss-dimmer
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@ -16,6 +16,7 @@ import cairo
import argparse import argparse
import threading import threading
import time import time
import math
from Xlib import display, X from Xlib import display, X
from Xlib.error import BadWindow from Xlib.error import BadWindow
from Xlib.protocol.event import MapNotify from Xlib.protocol.event import MapNotify
@ -54,7 +55,7 @@ def on_draw(widget, event, options, background, start):
wwidth, wheight = widget.get_size() wwidth, wheight = widget.get_size()
delta = options.end_opacity - options.start_opacity delta = options.end_opacity - options.start_opacity
elapsed = time.monotonic() - start elapsed = time.monotonic() - start
current = elapsed / options.delay current = easing_functions[options.easing_function](elapsed / options.delay)
opacity = delta * current + options.start_opacity opacity = delta * current + options.start_opacity
# Background # Background
@ -105,6 +106,20 @@ def on_draw(widget, event, options, background, start):
dim(event, once=True) dim(event, once=True)
# See: https://easings.net/
easing_functions = {
"none": lambda x: x,
"ease-out-circ": lambda x: math.sqrt(1 - pow(x - 1, 2)),
"ease-out-sine": lambda x: math.sin(x * math.pi / 2),
"ease-out-cubic": lambda x: 1 - pow(1 - x, 3),
"ease-out-quint": lambda x: 1 - pow(1 - x, 5),
"ease-out-expo": lambda x: 1 - pow(2, -10 * x),
"ease-out-quad": lambda x: 1 - (1 - x) * (1 - x),
"ease-out-elastic": (
lambda x: pow(2, -10 * x) * math.sin((x * 10 - 0.75) * (2 * math.pi) / 3) + 1
),
}
if __name__ == "__main__": if __name__ == "__main__":
now = time.monotonic() now = time.monotonic()
parser = argparse.ArgumentParser() parser = argparse.ArgumentParser()
@ -116,6 +131,12 @@ if __name__ == "__main__":
add("--font", default="DejaVu Sans", help="font for countdown") add("--font", default="DejaVu Sans", help="font for countdown")
add("--locker", default="i3lock", help="quit if window class detected") add("--locker", default="i3lock", help="quit if window class detected")
add("--background", help="use a background instead of black") add("--background", help="use a background instead of black")
add(
"--easing-function",
default="ease-out-circ",
choices=easing_functions.keys(),
help="easing function for opacity",
)
options = parser.parse_args() options = parser.parse_args()
background = None background = None