game_cocos_2c/assets/scripts/utils/UIHelper.ts

import { AppKernel } from "@scripts/app/AppKernel";
import { Button, Color, Component, Node, Sprite, Toggle, UIOpacity, UIRenderer, UITransform, find } from "cc";

const CUSTOM_CLICK = "_customOnClick";

export function addBtnClick(btn: Button | Node, onClick: Function, target?) {
    const onClickHandle = () => {
        AppKernel.sound.playBtnClick();
        onClick && onClick.apply(target);
    }
    const isNode = btn instanceof Node;
    const event_key = isNode ? Node.EventType.TOUCH_END : Button.EventType.CLICK;
    const btn_node = isNode ? btn : btn.node;
    btn_node.on(event_key, onClickHandle);
    btn_node[CUSTOM_CLICK] = onClickHandle;
}

export function removeBtnClick(btn: Button | Node, onClick, target) {
    const isNode = btn instanceof Node;
    const event_key = isNode ? Node.EventType.TOUCH_END : Button.EventType.CLICK;
    const btn_node = isNode ? btn : btn.node;
    const onClickHandle = btn_node[CUSTOM_CLICK];
    if (onClickHandle) {
        btn_node.off(event_key, onClickHandle);
        return;
    }

    btn_node.off(event_key, onClick, target);
}

export function addTogClick(tog: Toggle | Node, onToggle: Function, target?) {
    if (tog instanceof Toggle) {
        tog = tog.node;
    }

    tog.on(Toggle.EventType.CLICK, onToggle, target)
}

/**
 * 设置透明度
 * @param ui 
 * @param alpha  0 ~ 1;
 * @returns 
 */
export function setAlpha(ui: UIRenderer | Node, alpha: number) {

    if (ui instanceof Node) {
        const comp = ui.getComponent(UIOpacity) || ui.addComponent(UIOpacity);
        comp.opacity = alpha;
        return;
    }

    let color = ui.color.clone();
    color.a = 255 * alpha;
    ui.color = color;
}

export function setAsLastSibling(node: Node) {
    let index = node.parent.children.length - 1;
    index = Math.max(0, index);
    node.setSiblingIndex(index);
}


export enum ImgFitMode {
    FitWidth = 1,
    FitHeight
}

export function setSpriteFitMode(sprite: Sprite, fitMoed?: ImgFitMode) {
    if (sprite === null || !sprite.spriteFrame) return;
    if (fitMoed === null) return;

    sprite.sizeMode = Sprite.SizeMode.CUSTOM;
    sprite['']
    const trans = sprite.node.getComponent(UITransform);
    const ratio = sprite.spriteFrame.width / sprite.spriteFrame.height;
    switch (fitMoed) {
        case ImgFitMode.FitHeight:
            trans.width = ratio * trans.height
            break;
        case ImgFitMode.FitWidth:
            trans.height = trans.width / ratio;
            break;
    }
}