Function draw_plot_title

crates/plotlars-plotters/src/render/title.rs:7–41

(
    root: &DrawingArea<DB, plotters::coord::Shift>,
    config: &LayoutConfig,
    width: u32,
    height: u32,
)

use crate::converters::layout::LayoutConfig;

pub(super) fn draw_plot_title<DB: DrawingBackend>(
    root: &DrawingArea<DB, plotters::coord::Shift>,
    config: &LayoutConfig,
    width: u32,
    height: u32,
) {
    let title = match config.title {
        Some(ref t) => t,
        None => return,
    };

    let font_name = config.title_font.as_str();
    let font_size = config.title_font_size as f64;
    let color = config
        .title_color
        .as_ref()
        .map(convert_rgb)
        .unwrap_or(BLACK);

    let style = TextStyle::from((font_name, font_size).into_font())
        .color(&color)
        .pos(Pos::new(HPos::Center, VPos::Top));

    // Position: default is centered at top, user can override with x/y
    let tx = config
        .title_x
        .map(|x| (x * width as f64) as i32)
        .unwrap_or(width as i32 / 2);
    let ty = config
        .title_y
        .map(|y| ((1.0 - y) * height as f64) as i32)
        .unwrap_or((15 + title_top_margin(config) as i32) / 2);

    root.draw_text(title, &style, (tx, ty)).unwrap();
}

pub(super) fn title_top_margin(config: &LayoutConfig) -> u32 {
    if config.title.is_some() {