/// Display mode of arranger
pub enum ArrangerViewMode {
    Vertical,
    VerticalCompact,
    Horizontal,
}

impl ArrangerViewMode {
    pub fn to_next (&mut self) {
        *self = match self {
            Self::Vertical        => Self::VerticalCompact,
            Self::VerticalCompact => Self::Horizontal,
            Self::Horizontal      => Self::Vertical,
        }
    }
}