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#!/usr/bin/python3
# read_css.py
#
# Copyright:
# Copyright (C) 2024-2025 Bernd Schumacher <bernd@bschu.de>
#
# License: GPL-3.0+
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
# .
# This package is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
# .
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <https://www.gnu.org/licenses/>.
# Comment:
# On Debian systems, the complete text of the GNU General
# Public License version 3 can be found in
# "/usr/share/common-licenses/GPL-3".
""" read_css.py reads .css file """
import sys
import os
import gi
sys.path.append(os.path.dirname(os.path.dirname(os.path.realpath(__file__))))
if __name__ == '__main__':
from cashbox.app import App
try:
from cashbox.read_appargs import appargs
except ImportError as exc:
print('Error: cashbox modules not found.', exc)
sys.exit(1)
try:
gi.require_version('Gtk', '4.0')
gi.require_version('Adw', '1')
from gi.repository import Adw, Gtk, Gdk
except (ImportError, ValueError) as exc:
print('Error: Dependencies not met.', exc)
sys.exit(1)
def read_css():
""" reads .css file """
css_provider = Gtk.CssProvider()
css_provider.load_from_path(appargs.css_path)
styleContext = Gtk.StyleContext
display = Gdk.Display.get_default()
styleContext.add_provider_for_display(display, css_provider,
Gtk.STYLE_PROVIDER_PRIORITY_USER)
if __name__ == '__main__':
# test button
# should change color of label to red -
# defined in cashbox.css as "#invalid"
HINT = """
Hint: to see color of label change, when pressing the button, run:
cat <<END >/tmp/read_css.css
#invalid {
background: @error_color;
}
END
./read_css.py --css-path /tmp/read_css.css
"""
print(HINT)
class CssWindow(Adw.Window):
""" test window using .css file """
def __init__(self, **kwargs):
super().__init__(**kwargs)
box = Gtk.Box()
self.set_content(box)
button = Gtk.Button(label="button")
box.append(button)
label = Gtk.Label(label="label")
box.append(label)
button.connect('clicked', self.clicked, label)
for i, j in appargs.items():
print(f"<{i}>=<{j}>")
def clicked(self, _button, label):
""" test calback for button """
if label.get_name() == "invalid":
label.set_name("normal")
else:
label.set_name("invalid")
class MyApp(App):
""" test class App """
def on_activate(self, app):
""" start test window """
win = CssWindow(application=app)
win.present()
myapp = MyApp()
myapp.run(sys.argv)
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