const { ccclass, property } = cc._decorator;

@ccclass
export default class Adapt extends cc.Component {
    @property()
    isByChange = true;
    onLoad() {
        if (this.isByChange) {
            cc.view.setResizeCallback(() => this.resize())
        }
        this.resize();
    }

    public curDR: cc.Size;
    public resize() {

        var cvs = cc.find('Canvas').getComponent(cc.Canvas);
        //保存原始设计分辨率，供屏幕大小变化时使用
        // if (!this.curDR) {
        this.curDR = cvs.designResolution;
        // }
        var dr = this.curDR;
        var s = cc.view.getFrameSize();
        var rw = s.width;
        var rh = s.height;
        var finalW = rw;
        var finalH = rh;

        if ((rw / rh) > (dr.width / dr.height)) {
            //!#zh: 是否优先将设计分辨率高度撑满视图高度。 */
            //cvs.fitHeight = true;

            //如果更长，则用定高
            finalH = dr.height;
            finalW = finalH * rw / rh;
        }
        else {
            /*!#zh: 是否优先将设计分辨率宽度撑满视图宽度。 */
            //cvs.fitWidth = true;
            //如果更短，则用定宽
            finalW = dr.width;
            finalH = rh / rw * finalW;
        }
        cvs.designResolution = cc.size(finalW, finalH);
        cvs.node.width = finalW;
        cvs.node.height = finalH;
        cvs.node.emit('resize');
    }
}