cc.Class({
    extends: cc.Component,

    properties: {
        btnPrefab: {
            default: null,
            type: cc.Prefab
        },
        btns: []
    },

    // LIFE-CYCLE CALLBACKS:

    onLoad () {

        for (let i = 0 ; i < 5; i++) {
            var btn = cc.instantiate(this.btnPrefab);
            btn.getComponent('topMenuBtn').btn_idx = i;
            btn.getComponent('topMenuBtn').selected = i === 0;
            this.btns.push(btn);
            this.node.addChild(btn);
            let y = -250 - 100 * i;
            btn.setPosition(cc.v2(0, y));
        }
    },

    start () {
    },

    // update (dt) {},
    updateMenuShow(index) {
        for(let btn of this.btns) {
            let comp = btn.getComponent('topMenuBtn');
            comp.selected = comp.btn_idx === index;
            comp.updateStatus();
        }
    }
});