js-draw
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Draw pictures using a pen, touchscreen, or mouse! JS-draw is a drawing library for JavaScript and TypeScript.
22 lines (21 loc) • 907 B
TypeScript
interface Callbacks {
filter(event: KeyboardEvent): boolean;
handleKeyDown(event: KeyboardEvent): void;
handleKeyUp(event: KeyboardEvent): void;
/**
* Should return `true` iff `source` is also registered as an event listener source.
* If `false` and focus leaves the original source, keyup events are fired.
*/
getHandlesKeyEventsFrom(source: Node): boolean;
}
/**
* Calls `callbacks` when different keys are known to be pressed.
*
* `filter` can be used to ignore events.
*
* This includes keys that didn't trigger a keydown or keyup event, but did cause
* shiftKey/altKey/metaKey/etc. properties to change on other events (e.g. mousemove
* events). Artifical events are created for these changes and sent to `callbacks`.
*/
declare const listenForKeyboardEventsFrom: (elem: HTMLElement, callbacks: Callbacks) => void;
export default listenForKeyboardEventsFrom;