numix-gtk-theme/gtk-3.0/scss/widgets/_toggle.scss

/***********************
 ! Check and Radio items
************************/

$suffix: if($variant == "dark", "-dark", "");

@mixin toggle($type) {
	background-image: none;

	-gtk-icon-source: url("../assets/#{$type}-unchecked#{$suffix}.png");

	&:insensitive { -gtk-icon-source: url("../assets/#{$type}-unchecked-insensitive#{$suffix}.png"); }

	&:checked, &:active {
		-gtk-icon-source: url("../assets/#{$type}-checked#{$suffix}.png");

		&:insensitive { -gtk-icon-source: url("../assets/#{$type}-checked-insensitive#{$suffix}.png"); }
	}

	&:inconsistent {
		-gtk-icon-source: url("../assets/#{$type}-mixed#{$suffix}.png");

		&:insensitive { -gtk-icon-source: url("../assets/#{$type}-mixed-insensitive#{$suffix}.png"); }
	}

	&.menuitem {
		-gtk-icon-source: none;

		&:insensitive { -gtk-icon-source: none; }

		&:checked, &:active {
			-gtk-icon-source: url("../assets/menuitem-#{$type}-checked.png");

			&:hover { -gtk-icon-source: url("../assets/menuitem-#{$type}-checked-hover.png"); }

			&:insensitive { -gtk-icon-source: url("../assets/menuitem-#{$type}-checked-insensitive.png"); }
		}

		&:inconsistent {
			-gtk-icon-source: url("../assets/menuitem-#{$type}-mixed.png");

			&:hover { -gtk-icon-source: url("../assets/menuitem-#{$type}-mixed-hover.png"); }

			&:insensitive { -gtk-icon-source: url("../assets/menuitem-#{$type}-mixed-insensitive.png"); }
		}
	}
}

@include exports("checkradio") {
	* {
		-GtkCheckButton-indicator-size: 16;
		-GtkCheckMenuItem-indicator-size: 16;
	}

	.radio { @include toggle("radio"); }

	.check { @include toggle("checkbox"); }

	GtkIconView.content-view.cell.check {
		-gtk-icon-source: url("assets/grid-selection-unchecked#{$suffix}.png");

		&:active { -gtk-icon-source: url("assets/grid-selection-checked#{$suffix}.png"); }
	}
}


/********
 ! Switch
*********/

@include exports("switch") {
	GtkSwitch {
		padding: 0;
		border-radius: $roundness;
		font: bold condensed;
		outline-offset: -4px;

		&.slider {
			@include linear-gradient(shade($bg_color, 1.2));

			border: 1px solid rgba(0,0,0,0.2);
			box-shadow: 0 1px 2px -1px alpha($dark_shadow, .12);

			&:insensitive {
				border-color: rgba(0,0,0,0.1);
				background-color: shade($bg_color, 0.9);
				box-shadow: none;
			}
		}

		&.trough {
			@include linear-gradient(shade($bg_color, .95), to top);

			border: 1px solid border_normal($bg_color);
			color: $fg_color;
			box-shadow: inset 1px 0 alpha($dark_shadow, .07),
						inset 0 1px alpha($dark_shadow, .08),
						inset -1px 0 alpha($dark_shadow, .07),
						inset 0 -1px alpha($dark_shadow, .05);

			&:active {
			    @include linear-gradient($selected_bg_color, to top);

				border-color: shade($selected_bg_color, 0.9);
				color: $selected_fg_color;
			}

			&:insensitive {
			    @include linear-gradient(shade($bg_color, .9), to top);

				border-color: border_insensitive($bg_color);
				color: mix($fg_color, $bg_color, 0.5);
			}
		}
	}
}