Enum HandleEdge 

pub enum HandleEdge {
    Leading,
    Trailing,
}

Which edge of its own container a handle hugs.

A handle named no edge straddles the boundary it resizes, half its band on either side, which is what a divider between two panels of a group wants. A dock’s own edge handle cannot: dock_frame clips to the dock’s box, so the half hanging outside is cut away – what it paints and what it hit-tests alike, which is why the outer half of a dock’s grab band has never actually been grabbable. Naming the edge moves the whole band inside.

The hairline stays on the boundary itself: it is the container’s outermost pixel, the one the neighbour’s content butts up against. Moving it inward by even a pixel leaves that pixel of the container showing past the line on one side, or a gap before it on the other, along the whole seam. What a renderer paints on top of the line – an indicator thicker than the line, centred on it – overhangs the boundary, and the container’s clip takes the outer half off it unless the renderer defers that part. Only that part: a deferred element paints after the whole tree, and no priority puts it beneath the application’s own deferred content, so a deferred line would cut straight through a popover opened at the default priority from a panel drawn before this container. A renderer learns which edge it is drawing for from ResizeHandleContext::edge.

Variants

Leading

Where the axis starts: the left edge of a horizontal handle’s container, the top edge of a vertical one’s.

Trailing

Where the axis ends.

Trait Implementations

impl Clone for HandleEdge

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 HandleEdge

impl Debug for HandleEdge

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

Formats the value using the given formatter.

impl Eq for HandleEdge

impl PartialEq for HandleEdge

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for HandleEdge