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* @module Widgets
*/
import * as MH from "@lisn/globals/minification-helpers";
import { validateBoolean, validateNumber } from "@lisn/utils/validation";
import { GestureWatcher } from "@lisn/watchers/gesture-watcher";
import {
Widget,
WidgetConfigValidatorObject,
registerWidget,
} from "@lisn/widgets/widget";
/**
* This is a simple wrapper around the {@link GestureWatcher}. If you are using
* the JavaScript API, you should use the {@link GestureWatcher} directly. The
* purpose of this widget is to expose the watcher's ability to track gestures
* and set relevant CSS properties via the HTML API. See
* {@link GestureWatcher.trackGesture}.
*
* -----
*
* To use with auto-widgets (HTML API) (see
* {@link Settings.settings.autoWidgets | settings.autoWidgets}), the following
* CSS classes or data attributes are recognized:
* - `lisn-track-gesture` class or `data-lisn-track-gesture` attribute set on
* the element that constitutes the widget.
*
* See below examples for what values you can use set for the data attributes
* in order to modify the configuration of the automatically created widget.
*
* @example
* This will track user gestures over this element and set the relevant CSS
* properties. It will use the default {@link GestureWatcher} options.
*
* ```html
* <div class="lisn-track-gesture"></div>
* ```
*
* @example
* As above but with custom settings.
*
* ```html
* <div data-lisn-track-gesture="prevent-default=false
* | min-delta-x=-100
* | max-delta-x=100
* | min-delta-y=-100
* | max-delta-y=100
* | min-delta-z=0.5
* | max-delta-z=2"
* ></div>
* ```
*/
export class TrackGesture extends Widget {
static get(element: Element): TrackGesture | null {
const instance = super.get(element, DUMMY_ID);
if (MH.isInstanceOf(instance, TrackGesture)) {
return instance;
}
return null;
}
static register() {
registerWidget(
WIDGET_NAME,
(element, config) => {
if (!TrackGesture.get(element)) {
return new TrackGesture(element, config);
}
return null;
},
configValidator,
);
}
constructor(element: Element, config?: TrackGestureConfig) {
super(element, { id: DUMMY_ID });
GestureWatcher.reuse().trackGesture(element, null, {
preventDefault: config?.preventDefault,
minTotalDeltaX: config?.minDeltaX,
maxTotalDeltaX: config?.maxDeltaX,
minTotalDeltaY: config?.minDeltaY,
maxTotalDeltaY: config?.maxDeltaY,
minTotalDeltaZ: config?.minDeltaZ,
maxTotalDeltaZ: config?.maxDeltaZ,
});
this.onDestroy(() => GestureWatcher.reuse().noTrackGesture(element));
}
}
/**
* @interface
*/
export type TrackGestureConfig = {
/**
* Corresponds to
* {@link Watchers/GestureWatcher.OnGestureOptions.preventDefault | OnGestureOptions.preventDefault}.
*
* @defaultValue undefined // GestureWatcher default
*/
preventDefault?: boolean;
/**
* Corresponds to
* {@link Watchers/GestureWatcher.OnGestureOptions.minTotalDeltaX | OnGestureOptions.minTotalDeltaX}.
*
* @defaultValue undefined // GestureWatcher default
*/
minDeltaX?: number;
/**
* Corresponds to
* {@link Watchers/GestureWatcher.OnGestureOptions.maxTotalDeltaX | OnGestureOptions.maxTotalDeltaX}.
*
* @defaultValue undefined // GestureWatcher default
*/
maxDeltaX?: number;
/**
* Corresponds to
* {@link Watchers/GestureWatcher.OnGestureOptions.minTotalDeltaY | OnGestureOptions.minTotalDeltaY}.
*
* @defaultValue undefined // GestureWatcher default
*/
minDeltaY?: number;
/**
* Corresponds to
* {@link Watchers/GestureWatcher.OnGestureOptions.maxTotalDeltaY | OnGestureOptions.maxTotalDeltaY}.
*
* @defaultValue undefined // GestureWatcher default
*/
maxDeltaY?: number;
/**
* Corresponds to
* {@link Watchers/GestureWatcher.OnGestureOptions.minTotalDeltaZ | OnGestureOptions.minTotalDeltaZ}.
*
* @defaultValue undefined // GestureWatcher default
*/
minDeltaZ?: number;
/**
* Corresponds to
* {@link Watchers/GestureWatcher.OnGestureOptions.maxTotalDeltaZ | OnGestureOptions.maxTotalDeltaZ}.
*
* @defaultValue undefined // GestureWatcher default
*/
maxDeltaZ?: number;
};
// --------------------
const WIDGET_NAME = "track-gesture";
// Only one TrackGesture widget per element is allowed, but Widget requires a
// non-blank ID.
const DUMMY_ID = WIDGET_NAME;
// For HTML API only
const configValidator: WidgetConfigValidatorObject<TrackGestureConfig> = {
preventDefault: validateBoolean,
minDeltaX: validateNumber,
maxDeltaX: validateNumber,
minDeltaY: validateNumber,
maxDeltaY: validateNumber,
minDeltaZ: validateNumber,
maxDeltaZ: validateNumber,
};
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