lazy-widgets/dist/helpers/CompoundClickHelper.js

Typescript retained mode GUI for the HTML canvas API

import { ClickState } from "./ClickState.js";
/**
 * A class that mixes multiple {@link GenericClickHelper} instances into one.
 * Useful if you want a widget to be both clickable by a pointer and by the
 * enter key
 *
 * @category Helper
 */
export class CompoundClickHelper {
    constructor(clickHelpers) {
        this.clickHelpers = clickHelpers;
    }
    get lastClickState() {
        let highestState = ClickState.Released;
        for (const clickHelper of this.clickHelpers) {
            if (clickHelper.lastClickState > highestState) {
                highestState = clickHelper.lastClickState;
            }
        }
        return highestState;
    }
    get clickState() {
        let highestState = ClickState.Released;
        for (const clickHelper of this.clickHelpers) {
            if (clickHelper.clickState > highestState) {
                highestState = clickHelper.clickState;
            }
        }
        return highestState;
    }
    /**
     * See {@link BaseClickHelper#clickStateChanged}.
     *
     * Note that this does not check if the combined state has changed, it only
     * check if any of the states in {@link CompoundClickHelper#clickHelpers}
     * has changed, meaning that this can be true while
     * {@link CompoundClickHelper#clickState} is equal to
     * {@link CompoundClickHelper#lastClickState}. To check whether the combined
     * state changed, compare the aforementioned values. This is the default
     * behaviour so that clicks aren't dropped.
     */
    get clickStateChanged() {
        for (const clickHelper of this.clickHelpers) {
            if (clickHelper.clickStateChanged) {
                return true;
            }
        }
        return false;
    }
    /**
     * Similar to {@link BaseClickHelper#wasClick}, except that the wasClick
     * property for each click helper is only true if the
     * {@link BaseClickHelper#clickStateChanged} property is also true.
     */
    get wasClick() {
        for (const clickHelper of this.clickHelpers) {
            if (clickHelper.wasClick && clickHelper.clickStateChanged) {
                return true;
            }
        }
        return false;
    }
    /** Resets each click helper instance being mixed. */
    reset() {
        for (const clickHelper of this.clickHelpers) {
            clickHelper.reset();
        }
    }
    /**
     * Unsets the {@link BaseClickHelper#clickStateChanged} flag in each click
     * helper instance being mixed.
     */
    doneProcessing() {
        for (const clickHelper of this.clickHelpers) {
            clickHelper.doneProcessing();
        }
    }
}
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