Trait InteractiveLegend 

pub trait InteractiveLegend<C: PixelColor>: Legend<C> {
    type Event;
    type Response;

    // Required methods
    fn handle_event(
        &mut self,
        event: Self::Event,
        viewport: Rectangle,
    ) -> ChartResult<Self::Response>;
    fn hit_test(&self, point: Point, viewport: Rectangle) -> Option<usize>;
    fn toggle_entry(&mut self, index: usize) -> ChartResult<()>;
    fn selected_entry(&self) -> Option<usize>;
    fn set_selected_entry(&mut self, index: Option<usize>);
}

Trait for legends that support interactive features

Required Associated Types

type Event

Event type for legend interactions

type Response

Response type for legend interactions

Required Methods

fn handle_event( &mut self, event: Self::Event, viewport: Rectangle, ) -> ChartResult<Self::Response>

Handle an interaction event

Arguments

• event - The interaction event
• viewport - The legend viewport

fn hit_test(&self, point: Point, viewport: Rectangle) -> Option<usize>

Check if a point is within a legend entry

Arguments

• point - The point to check
• viewport - The legend viewport

fn toggle_entry(&mut self, index: usize) -> ChartResult<()>

Toggle the visibility of an entry

fn selected_entry(&self) -> Option<usize>

Get the currently selected entry index

fn set_selected_entry(&mut self, index: Option<usize>)

Set the selected entry

Implementors