Struct DragState 

pub struct DragState { /* private fields */ }

Runtime pointer state for handle-based dragging.

The helper intentionally stores only coordinates and item positions, never rendered GPUI elements. This mirrors the safe part of drag-rs’ model: a drag operation has a start point, a current cursor point and a result callback, while each UI renders its own preview/handle natively.

Implementations

impl DragState

pub fn start(&mut self, index: usize, position: Point<Pixels>)

pub fn start_at( &mut self, index: usize, position: Point<Pixels>, bounds: Option<Bounds<Pixels>>, )

pub fn update_position(&mut self, position: Point<Pixels>)

pub fn set_over(&mut self, index: usize)

pub fn move_active_to(&mut self, index: usize)

pub fn finish(&mut self) -> Option<(usize, usize)>

pub fn cancel(&mut self)

pub fn active_index(&self) -> Option<usize>

pub fn origin_index(&self) -> Option<usize>

pub fn over_index(&self) -> Option<usize>

pub fn is_active(&self, index: usize) -> bool

pub fn is_over(&self, index: usize) -> bool

pub fn offset(&self, axis: DragAxis) -> (Pixels, Pixels)

pub fn offset_from_bounds( &self, axis: DragAxis, bounds: Option<Bounds<Pixels>>, ) -> (Pixels, Pixels)

Offset the active item from its current layout slot so the original grabbed point remains under the pointer.

Reorderable lists may move the active item to a new slot while the pointer is still down. Using only current - start makes the item jump when that layout slot changes. When the caller can provide the active slot’s latest bounds, this method compensates by anchoring the visual preview to the grab offset captured on mouse down.

Trait Implementations

impl Clone for DragState

fn clone(&self) -> DragState

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for DragState

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

Formats the value using the given formatter.

impl Default for DragState

fn default() -> DragState

Returns the “default value” for a type.