Struct LegendElement 

pub struct LegendElement;

The legend box in one corner of the data area.

Trait Implementations

impl Clone for LegendElement

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for LegendElement

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

Formats the value using the given formatter.

impl Draggable for LegendElement

fn nudge_element(&self) -> Element

The nudge-path element this drag target moves. This mapping is the only thing an implementation defines; movement itself happens in Self::drag_by.

fn drag_by(&self, cfg: &mut C, dx: f32, dy: f32) -> NudgeResult

Default drag pipeline: apply the pointer delta through Config::nudge. Returns NudgeResult::Rejected (and leaves cfg untouched) when the move would leave the chart area.

impl PartialEq for LegendElement

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

Equality operator ==.

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

Inequality operator !=.

impl Selectable for LegendElement

fn element_id(&self) -> String

The whole content document is measured as one rich text ('\n' segments break lines); shared placement expands it by padding and anchors it at the configured data-area corner.

fn bounds(&self, cfg: &Config, measure: &dyn MeasureText) -> Option<RectF>

Interaction bounds of this element under cfg, or None when the element is hidden, empty, or the layout is infeasible. Text-bearing elements use measure; tick-label elements remain representative strips rather than exact rendered-label unions.

fn as_draggable(&self) -> Option<&dyn Draggable>

This element’s drag capability, if any. Elements that also implement Draggable override this with Some(self). Lets hosts go from a HitMap hit straight to dragging without knowing concrete types.

fn selection_box( &self, cfg: &C, measure: &dyn MeasureText, ) -> Option<SelectionBox>

Default selection policy: a blue box SELECTION_PADDING px outside the bounds, stroked SELECTION_STROKE_WIDTH px in SELECTION_COLOR. Resizable elements additionally carry the eight resize handle squares.

fn contains(&self, cfg: &C, measure: &dyn MeasureText, x: f32, y: f32) -> bool

Default hit test: point-in-bounds.

fn register_into(self, map: &mut HitMap<C>) -> HitId

where Self: Sized + Send + Sync + 'static,

Default registration: every Selectable can enter a HitMap the same way. Returns the id the map will report from hit_test. (Send + Sync because hosts store hit maps in cross-thread render state, e.g. egui’s CallbackResources.)

fn as_resizable(&self) -> Option<&dyn Resizable<C>>

This element’s resize capability, if any. Elements that also implement Resizable override this with Some(self) — their selection box then grows the eight resize handles automatically.

impl StructuralPartialEq for LegendElement