grab

pub fn grab(self: *ScrollBarWidget) Grab {
    var fill = self.data().options.color(.text).opacity(0.5);
    if (dvui.captured(self.data().id) or self.highlight) {
        fill = self.data().options.color(.text).opacity(0.3);
    }

    return .{
        .rect = self.data().parent.screenRectScale(self.grabRect.insetAll(2)).r,
        .color = fill,
    };
}