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xsecurelock: monitor background change

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Vincent Bernat 2021-12-08 17:19:46 +01:00
parent 4997db033a
commit 2b94a98c91
1 changed files with 52 additions and 28 deletions
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74
bin/xsecurelock-saver
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@ -10,62 +10,86 @@ done through environment variables:
"""
import os
import types
import gi
gi.require_version("Gtk", "3.0")
from gi.repository import Gtk, Gdk, GdkX11, GLib, GdkPixbuf
from gi.repository import Gtk, Gdk, GdkX11, GLib, GdkPixbuf, Gio
import cairo
def on_win_realize(widget, position):
def on_win_realize(widget, ctx):
"""On realization, embed into XSCREENSAVER_WINDOW and remember parent position."""
parent_wid = int(os.getenv("XSCREENSAVER_WINDOW", 0))
if not parent_wid:
return
parent = GdkX11.X11Window.foreign_new_for_display(widget.get_display(), parent_wid)
x, y, w, h = parent.get_geometry()
ctx.position = x, y
window = widget.get_window()
window.resize(w, h)
window.reparent(parent, 0, 0)
[*position] = x, y
def on_win_draw(widget, ctx, background, position):
def on_win_draw(widget, cctx, ctx):
"""Draw background image."""
ctx.set_operator(cairo.OPERATOR_SOURCE)
if not background:
ctx.set_source_rgba(0, 0, 0, opacity)
ctx.paint()
cctx.set_operator(cairo.OPERATOR_SOURCE)
if not ctx.background:
cctx.set_source_rgba(0, 0, 0, opacity)
cctx.paint()
return
x, y = position
x, y = ctx.position
wwidth, wheight = widget.get_size()
scale = widget.get_scale_factor()
bg = background.new_subpixbuf(x * scale, y * scale, wwidth * scale, wheight * scale)
ctx.scale(1 / scale, 1 / scale)
Gdk.cairo_set_source_pixbuf(ctx, bg, 0, 0)
ctx.paint()
bg = ctx.background.new_subpixbuf(
x * scale, y * scale, wwidth * scale, wheight * scale
)
cctx.scale(1 / scale, 1 / scale)
Gdk.cairo_set_source_pixbuf(cctx, bg, 0, 0)
cctx.paint()
def on_background_change(monitor, f1, f2, event, ctx):
"""Update background when changed."""
print(f1, f2, event, ctx)
if event not in (
Gio.FileMonitorEvent.CHANGES_DONE_HINT,
Gio.FileMonitorEvent.RENAMED,
):
return
try:
new_background = GdkPixbuf.Pixbuf.new_from_file(ctx.background_image)
except Exception:
pass
ctx.background = new_background
ctx.window.queue_draw()
if __name__ == "__main__":
background_image = os.getenv("XSECURELOCK_BACKGROUND_IMAGE", None)
ctx = types.SimpleNamespace()
ctx.background_image = os.getenv("XSECURELOCK_BACKGROUND_IMAGE", None)
ctx.background = None
ctx.position = [0, 0]
background = None
if background_image:
try:
background = GdkPixbuf.Pixbuf.new_from_file(background_image)
ctx.background = GdkPixbuf.Pixbuf.new_from_file(ctx.background_image)
except Exception:
pass
position = [0, 0]
window = Gtk.Window()
window.set_app_paintable(True)
window.set_visual(window.get_screen().get_rgba_visual())
window.connect("realize", on_win_realize, position)
window.connect("draw", on_win_draw, background, position)
window.connect("delete-event", Gtk.main_quit)
ctx.window = Gtk.Window()
ctx.window.set_app_paintable(True)
ctx.window.set_visual(ctx.window.get_screen().get_rgba_visual())
ctx.window.connect("realize", on_win_realize, ctx)
ctx.window.connect("draw", on_win_draw, ctx)
ctx.window.connect("delete-event", Gtk.main_quit)
window.show_all()
if ctx.background_image:
gfile = Gio.File.new_for_path(ctx.background_image)
monitor = gfile.monitor_file(Gio.FileMonitorFlags.WATCH_MOVES, None)
monitor.connect("changed", on_background_change, ctx)
ctx.window.show_all()
# Main loop
Gtk.main()