Trait DrawingRenderer 

pub trait DrawingRenderer: Send + Sync {
    // Required methods
    fn render(
        &self,
        drawing: &Drawing,
        painter: &Painter,
        rect: Rect,
        view: &ChartView<'_>,
    );
    fn hit_test(&self, drawing: &Drawing, point: Pos2, tolerance: f32) -> bool;

    // Provided method
    fn settings(&self, _ui: &mut Ui, _settings: &mut Value) -> bool { ... }
}

Rendering, picking and settings for a host-defined drawing tool. Anchors are projected by the manager into drawing.points; tool-specific data lives in drawing.custom_settings. Callbacks must tolerate incomplete drawings while the pointer previews their construction.

Required Methods

fn render( &self, drawing: &Drawing, painter: &Painter, rect: Rect, view: &ChartView<'_>, )

Paints inside the supplied pane clip, using current projected anchors and market data.

fn hit_test(&self, drawing: &Drawing, point: Pos2, tolerance: f32) -> bool

Tests the tool’s geometry in screen points. This result is authoritative, including after painting; returning false keeps custom decorative areas out of selection.

Provided Methods

fn settings(&self, _ui: &mut Ui, _settings: &mut Value) -> bool

Edits the tool’s settings and returns whether they changed. The manager retains undo, lock checks and persistence notifications. Tools without settings keep the default.

Dyn Compatibility

This trait is dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

Implementors