Trait layout::core::format::RenderBackend

source · [−]
pub trait RenderBackend {
    fn draw_rect(
        &mut self,
        xy: Point,
        size: Point,
        look: &StyleAttr,
        clip: Option<ClipHandle>
    );
    fn draw_line(&mut self, start: Point, stop: Point, look: &StyleAttr);
    fn draw_circle(&mut self, xy: Point, size: Point, look: &StyleAttr);
    fn draw_text(&mut self, xy: Point, text: &str, look: &StyleAttr);
    fn draw_arrow(
        &mut self,
        path: &[(Point, Point)],
        dashed: bool,
        head: (bool, bool),
        look: &StyleAttr,
        text: &str
    );
    fn create_clip(
        &mut self,
        xy: Point,
        size: Point,
        rounded_px: usize
    ) -> ClipHandle;
}
Expand description

This is the trait that all rendering backends need to implement.

Required Methods

Draw a rectangle. The top-left point of the rectangle is \p xy. The shape style (color, edge-width) are passed in \p look. The parameter \p clip is an optional clip region (see: create_clip).

Draw a line between \p start and \p stop.

Draw an ellipse with the center \p xy, and size \p size.

source

fn draw_text(&mut self, xy: Point, text: &str, look: &StyleAttr)

Draw a labe.

Draw an arrow, with a label, with the style parameters in \p look.

Generate a clip region that shapes can use to create complex shapes.

Implementors