emmental/playlist/sort.py

# Copyright 2021 (c) Anna Schumaker.
from gi.repository import GObject
from gi.repository import Gtk

class UpDownBox(Gtk.Box):
    def __init__(self):
        Gtk.Box.__init__(self)
        self.append(Gtk.Button.new_from_icon_name("go-up-symbolic"))
        self.append(Gtk.Button.new_from_icon_name("go-down-symbolic"))
        self.add_css_class("linked")

        self.get_first_child().connect("clicked", self.clicked, "move-up")
        self.get_last_child().connect("clicked", self.clicked, "move-down")

        self.get_first_child().set_sensitive(False)
        self.get_last_child().set_sensitive(False)

    def set_active(self, active, first, last):
        self.get_first_child().set_sensitive(active and not first)
        self.get_last_child().set_sensitive(active and not last)

    def clicked(self, button, signal):
        self.emit(signal)

    @GObject.Signal
    def move_up(self): pass

    @GObject.Signal
    def move_down(self): pass


class DirectionButton(Gtk.Button):
    def __init__(self):
        Gtk.Button.__init__(self, sensitive=False)
        self.set_icon_name("view-sort-ascending")

    def set_direction(self, direction, active):
        sort = "ascending" if direction == "ASC" else "descending"
        self.set_icon_name(f"view-sort-{sort}")
        self.set_sensitive(active)