Enum OrderedMove 

pub enum OrderedMove {
    Prev,
    Next,
    First,
    Last,
}

Which way a move goes within an ordered collection.

See the module documentation for why the far ends are their own variants rather than a repeated step.

Variants

Prev

One place earlier in the collection’s order.

Next

One place later.

First

All the way to the first position.

Last

All the way to the last position.

Implementations

impl OrderedMove

pub const ALL: [OrderedMove; 4]

The four moves, in the order they are offered to the user.

pub fn destination(self, from: usize, count: usize) -> Option<usize>

Where index from lands in a collection of count items, or None when the move would change nothing.

A move that changes nothing is not offered: it earns no menu row, no custom action and no announcement. That is what keeps a row already at the top from advertising “Move to top”.

pub fn as_row_drop(self, from: usize, count: usize) -> Option<RowDrop>

The drop a pointer would have made to perform this move, or None when the move changes nothing.

pub fn available(from: usize, count: usize) -> Vec<OrderedMove>

The moves available from from in a collection of count.

pub fn label(self, axis: MoveAxis) -> LocalizedString

What this move is called on the given axis.

pub fn from_key( key: Key, modifiers: Modifiers, axis: MoveAxis, rtl: bool, ) -> Option<Self>

Decode the keyboard chord that performs a move on the given axis.

Alt plus the axis’ own two arrows steps; Alt+Home / Alt+End go to the ends. Alt is what every outliner and tab strip already uses for this (and what the three data views that had a keyboard reorder before this module used), so the chord is not new vocabulary.

rtl swaps the two horizontal arrows, because on the horizontal axis the arrow keys name a direction on screen while the move names a position in the order. Home/End are unaffected: they name the order’s ends, which do not flip.

Trait Implementations

impl Clone for OrderedMove

fn clone(&self) -> Self

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Copy for OrderedMove

impl Debug for OrderedMove

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Eq for OrderedMove

impl Hash for OrderedMove

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for OrderedMove

fn eq(&self, other: &Self) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for OrderedMove