53 lines
2.0 KiB
Python
53 lines
2.0 KiB
Python
# Copyright 2022 (c) Anna Schumaker.
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"""A custom Gtk.Box with controls for adjusting the volume."""
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from gi.repository import GObject
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from gi.repository import Gtk
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STEP_SIZE = 0.05
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def format_value_func(scale, value: float) -> str:
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"""Format the volume value to a percentage."""
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return f"{round(value*100)} %"
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class Controls(Gtk.Box):
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"""A Gtk.Box containing widgets for adjusting the volume."""
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volume = GObject.Property(type=float, default=1.0)
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def __init__(self):
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"""Initialize our volume controls."""
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super().__init__()
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self._decrement = Gtk.Button(icon_name="list-remove-symbolic",
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valign=Gtk.Align.END, has_frame=False,
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margin_bottom=6)
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self._adjustment = Gtk.Adjustment.new(1.0, 0.0, 1.0, STEP_SIZE, 0, 0)
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self._scale = Gtk.Scale(adjustment=self._adjustment, draw_value=True,
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valign=Gtk.Align.END, hexpand=True)
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self._increment = Gtk.Button(icon_name="list-add-symbolic",
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valign=Gtk.Align.END, has_frame=False,
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margin_bottom=6)
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self._scale.set_format_value_func(format_value_func)
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self.append(self._decrement)
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self.append(self._scale)
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self.append(self._increment)
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self._decrement.connect("clicked", self.__decrement)
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self._scale.connect("value-changed", self.__value_changed)
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self._increment.connect("clicked", self.__increment)
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self.bind_property("volume", self._adjustment, "value",
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GObject.BindingFlags.BIDIRECTIONAL)
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def __decrement(self, button: Gtk.Button) -> None:
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self._scale.set_value(self._scale.get_value() - STEP_SIZE)
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def __increment(self, button: Gtk.Button) -> None:
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self._scale.set_value(self._scale.get_value() + STEP_SIZE)
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def __value_changed(self, range: Gtk.Range) -> None:
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self.volume = range.get_value()
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