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dimmer: display a countdown

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Vincent Bernat 2021-08-04 11:27:27 +02:00
parent e06eda914e
commit 6729429c57
1 changed files with 32 additions and 12 deletions
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44
bin/dimmer
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@ -5,32 +5,51 @@
# It assumes we are using a compositor. # It assumes we are using a compositor.
import gi ; gi.require_version("Gtk", "3.0") import gi
gi.require_version("Gtk", "3.0")
from gi.repository import Gtk, Gdk, GLib from gi.repository import Gtk, Gdk, GLib
import cairo import cairo
import argparse import argparse
def draw(widget, event, options, current): def draw(widget, event, options, elapsed):
def dim(once=False): def dim(once=False):
cr = Gdk.cairo_create(window) cr = Gdk.cairo_create(window)
cr.set_source_rgba(0, 0, 0, current[0])
# Background
delta = options.max_opacity - options.min_opacity
current = elapsed[0] / options.delay
opacity = delta * current + options.min_opacity
cr.set_source_rgba(0, 0, 0, opacity)
cr.set_operator(cairo.OPERATOR_SOURCE) cr.set_operator(cairo.OPERATOR_SOURCE)
cr.paint() cr.paint()
# Remaining time
remaining = str(round(options.delay - elapsed[0]))
wwidth, wheight = widget.get_default_size()
cr.set_source_rgba(1, 1, 1, opacity)
cr.select_font_face(
options.font, cairo.FONT_SLANT_NORMAL, cairo.FONT_WEIGHT_BOLD
)
cr.set_font_size(wheight // 4)
_, _, twidth, theight, _, _ = cr.text_extents(remaining)
cr.move_to(wwidth // 2 - twidth // 2, wheight // 2 + theight // 2)
cr.show_text(remaining)
# Rearm timer
if not once: if not once:
current[0] += options.step elapsed[0] += options.step
delta = options.max_opacity - options.min_opacity if elapsed[0] <= options.delay:
delay = options.delay * options.step * 1000 / delta GLib.timeout_add(options.step * 1000, dim)
if current[0] <= options.max_opacity:
GLib.timeout_add(delay, dim)
window = widget.get_window() window = widget.get_window()
if not current: if not elapsed:
# First time we are called. # First time we are called.
current.append(options.min_opacity) elapsed.append(0)
dim() dim()
else: else:
# Timers already running, just dim to current value # Timers already running, just repaint
dim(once=True) dim(once=True)
@ -38,8 +57,9 @@ if __name__ == "__main__":
parser = argparse.ArgumentParser() parser = argparse.ArgumentParser()
parser.add_argument("--min-opacity", type=float, default=0.2) parser.add_argument("--min-opacity", type=float, default=0.2)
parser.add_argument("--max-opacity", type=float, default=1) parser.add_argument("--max-opacity", type=float, default=1)
parser.add_argument("--step", type=float, default=0.02) parser.add_argument("--step", type=float, default=0.1)
parser.add_argument("--delay", type=float, default=10) parser.add_argument("--delay", type=float, default=10)
parser.add_argument("--font", default="DejaVu Sans")
options = parser.parse_args() options = parser.parse_args()
display = Gdk.Display.get_default() display = Gdk.Display.get_default()