56 lines
2.3 KiB
TypeScript
56 lines
2.3 KiB
TypeScript
import type Chart from '../core/core.controller.js';
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import type { ChartEvent } from '../types.js';
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/**
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* Note: typedefs are auto-exported, so use a made-up `dom` namespace where
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* necessary to avoid duplicates with `export * from './helpers`; see
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* https://github.com/microsoft/TypeScript/issues/46011
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* @typedef { import('../core/core.controller.js').default } dom.Chart
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* @typedef { import('../../types').ChartEvent } ChartEvent
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*/
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/**
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* @private
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*/
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export declare function _isDomSupported(): boolean;
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/**
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* @private
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*/
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export declare function _getParentNode(domNode: HTMLCanvasElement): HTMLCanvasElement;
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export declare function getStyle(el: HTMLElement, property: string): string;
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/**
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* Gets an event's x, y coordinates, relative to the chart area
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* @param event
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* @param chart
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* @returns x and y coordinates of the event
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*/
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export declare function getRelativePosition(event: Event | ChartEvent | TouchEvent | MouseEvent, chart: Chart): {
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x: number;
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y: number;
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};
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export declare function getMaximumSize(canvas: HTMLCanvasElement, bbWidth?: number, bbHeight?: number, aspectRatio?: number): {
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width: number;
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height: number;
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};
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/**
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* @param chart
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* @param forceRatio
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* @param forceStyle
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* @returns True if the canvas context size or transformation has changed.
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*/
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export declare function retinaScale(chart: Chart, forceRatio: number, forceStyle?: boolean): boolean | void;
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/**
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* Detects support for options object argument in addEventListener.
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* https://developer.mozilla.org/en-US/docs/Web/API/EventTarget/addEventListener#Safely_detecting_option_support
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* @private
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*/
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export declare const supportsEventListenerOptions: boolean;
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/**
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* The "used" size is the final value of a dimension property after all calculations have
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* been performed. This method uses the computed style of `element` but returns undefined
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* if the computed style is not expressed in pixels. That can happen in some cases where
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* `element` has a size relative to its parent and this last one is not yet displayed,
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* for example because of `display: none` on a parent node.
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* @see https://developer.mozilla.org/en-US/docs/Web/CSS/used_value
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* @returns Size in pixels or undefined if unknown.
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*/
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export declare function readUsedSize(element: HTMLElement, property: 'width' | 'height'): number | undefined;
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