wy-mobile/miniprogram_npm/@vant/weapp/mixins/touch.js

'use strict';
Object.defineProperty(exports, '__esModule', { value: true });
exports.touch = void 0;
var MIN_DISTANCE = 10;
function getDirection(x, y) {
  if (x > y && x > MIN_DISTANCE) {
    return 'horizontal';
  }
  if (y > x && y > MIN_DISTANCE) {
    return 'vertical';
  }
  return '';
}
exports.touch = Behavior({
  methods: {
    resetTouchStatus: function () {
      this.direction = '';
      this.deltaX = 0;
      this.deltaY = 0;
      this.offsetX = 0;
      this.offsetY = 0;
    },
    touchStart: function (event) {
      this.resetTouchStatus();
      var touch = event.touches[0];
      this.startX = touch.clientX;
      this.startY = touch.clientY;
    },
    touchMove: function (event) {
      var touch = event.touches[0];
      this.deltaX = touch.clientX - this.startX;
      this.deltaY = touch.clientY - this.startY;
      this.offsetX = Math.abs(this.deltaX);
      this.offsetY = Math.abs(this.deltaY);
      this.direction =
        this.direction || getDirection(this.offsetX, this.offsetY);
    },
  },
});