code: function SpriteMouseEvent(metas) {
              this.target = metas.target;
              this.x = metas.x;
              this.y = metas.y;
              this.from = metas.from;
              this.fromX = metas.fromX;
              this.fromY = metas.fromY;
              this.stage = metas.stage;
          }
docs: 构造函数。