Trait Resizable

Source

pub trait Resizable<C: DragConfig = Config>: Selectable<C> {
    // Required method
    fn resize_targets(
        &self,
        handle: ResizeHandle,
    ) -> (Option<C::Element>, Option<C::Element>);

    // Provided methods
    fn resize_handles(
        &self,
        cfg: &C,
        measure: &dyn MeasureText,
    ) -> Option<[(ResizeHandle, RectF); 8]> { ... }
    fn hit_resize_handle(
        &self,
        cfg: &C,
        measure: &dyn MeasureText,
        x: f32,
        y: f32,
    ) -> Option<ResizeHandle> { ... }
    fn resize_by(
        &self,
        cfg: &mut C,
        handle: ResizeHandle,
        dx: f32,
        dy: f32,
    ) -> NudgeResult { ... }
}

Expand description

A selectable element whose extent can be adjusted by dragging the eight handles on its selection box.

Required Methods§

Source

fn resize_targets( &self, handle: ResizeHandle, ) -> (Option<C::Element>, Option<C::Element>)

The nudge elements a handle’s (horizontal, vertical) motion drives — the only thing an implementation defines. None components are discarded (an edge-midpoint handle resizes along one dimension).

Provided Methods§

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fn resize_handles( &self, cfg: &C, measure: &dyn MeasureText, ) -> Option<[(ResizeHandle, RectF); 8]>

Default handle geometry: eight squares on the selection box (element bounds + SELECTION_PADDING).

Source

fn hit_resize_handle( &self, cfg: &C, measure: &dyn MeasureText, x: f32, y: f32, ) -> Option<ResizeHandle>

Default handle hit test.

Source

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

Default resize pipeline: each motion component routes through Config::nudge on its target element, so resize obeys exactly the same feasibility rules as dragging those elements directly.