File name
Commit message
Commit date
File name
Commit message
Commit date
File name
Commit message
Commit date
File name
Commit message
Commit date
File name
Commit message
Commit date
import type { Chart, Point, FontSpec, CanvasFontSpec, PointStyle, RenderTextOpts } from '../types/index.js';
import type { TRBL, SplinePoint, RoundedRect, TRBLCorners } from '../types/geometric.js';
/**
* Converts the given font object into a CSS font string.
* @param font - A font object.
* @return The CSS font string. See https://developer.mozilla.org/en-US/docs/Web/CSS/font
* @private
*/
export declare function toFontString(font: FontSpec): string;
/**
* @private
*/
export declare function _measureText(ctx: CanvasRenderingContext2D, data: Record<string, number>, gc: string[], longest: number, string: string): number;
type Thing = string | undefined | null;
type Things = (Thing | Thing[])[];
/**
* @private
*/
export declare function _longestText(ctx: CanvasRenderingContext2D, font: string, arrayOfThings: Things, cache?: {
data?: Record<string, number>;
garbageCollect?: string[];
font?: string;
}): number;
/**
* Returns the aligned pixel value to avoid anti-aliasing blur
* @param chart - The chart instance.
* @param pixel - A pixel value.
* @param width - The width of the element.
* @returns The aligned pixel value.
* @private
*/
export declare function _alignPixel(chart: Chart, pixel: number, width: number): number;
/**
* Clears the entire canvas.
*/
export declare function clearCanvas(canvas?: HTMLCanvasElement, ctx?: CanvasRenderingContext2D): void;
export interface DrawPointOptions {
pointStyle: PointStyle;
rotation?: number;
radius: number;
borderWidth: number;
}
export declare function drawPoint(ctx: CanvasRenderingContext2D, options: DrawPointOptions, x: number, y: number): void;
export declare function drawPointLegend(ctx: CanvasRenderingContext2D, options: DrawPointOptions, x: number, y: number, w: number): void;
/**
* Returns true if the point is inside the rectangle
* @param point - The point to test
* @param area - The rectangle
* @param margin - allowed margin
* @private
*/
export declare function _isPointInArea(point: Point, area: TRBL, margin?: number): boolean;
export declare function clipArea(ctx: CanvasRenderingContext2D, area: TRBL): void;
export declare function unclipArea(ctx: CanvasRenderingContext2D): void;
/**
* @private
*/
export declare function _steppedLineTo(ctx: CanvasRenderingContext2D, previous: Point, target: Point, flip?: boolean, mode?: string): void;
/**
* @private
*/
export declare function _bezierCurveTo(ctx: CanvasRenderingContext2D, previous: SplinePoint, target: SplinePoint, flip?: boolean): void;
/**
* Render text onto the canvas
*/
export declare function renderText(ctx: CanvasRenderingContext2D, text: string | string[], x: number, y: number, font: CanvasFontSpec, opts?: RenderTextOpts): void;
/**
* Add a path of a rectangle with rounded corners to the current sub-path
* @param ctx - Context
* @param rect - Bounding rect
*/
export declare function addRoundedRectPath(ctx: CanvasRenderingContext2D, rect: RoundedRect & {
radius: TRBLCorners;
}): void;
export {};