layout::core::format

Trait RenderBackend

Source 
pub trait RenderBackend {
    // Required methods
    fn draw_rect(
        &mut self,
        xy: Point,
        size: Point,
        look: &StyleAttr,
        properties: Option<String>,
        clip: Option<ClipHandle>,
    );
    fn draw_line(
        &mut self,
        start: Point,
        stop: Point,
        look: &StyleAttr,
        properties: Option<String>,
    );
    fn draw_circle(
        &mut self,
        xy: Point,
        size: Point,
        look: &StyleAttr,
        properties: Option<String>,
    );
    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,
        properties: Option<String>,
        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§

Source

fn draw_rect( &mut self, xy: Point, size: Point, look: &StyleAttr, properties: Option<String>, clip: Option<ClipHandle>, )

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).

Source

fn draw_line( &mut self, start: Point, stop: Point, look: &StyleAttr, properties: Option<String>, )

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

Source

fn draw_circle( &mut self, xy: Point, size: Point, look: &StyleAttr, properties: Option<String>, )

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.

Source

fn draw_arrow( &mut self, path: &[(Point, Point)], dashed: bool, head: (bool, bool), look: &StyleAttr, properties: Option<String>, text: &str, )

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

Source

fn create_clip( &mut self, xy: Point, size: Point, rounded_px: usize, ) -> ClipHandle

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

Implementors§