aaac7fed
 liuqimichale
add
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import { ease } from '../util/ease'
import { DIRECTION_DOWN, PROBE_REALTIME } from '../util/const'
export function pullDownMixin(BScroll) {
BScroll.prototype._initPullDown = function () {
// must watch scroll in real time
this.options.probeType = PROBE_REALTIME
}
BScroll.prototype._checkPullDown = function () {
const {threshold = 90, stop = 40} = this.options.pullDownRefresh
// check if a real pull down action
if (this.directionY !== DIRECTION_DOWN || this.y < threshold) {
return false
}
if (!this.pulling) {
this.pulling = true
this.trigger('pullingDown')
}
this.scrollTo(this.x, stop, this.options.bounceTime, ease.bounce)
return this.pulling
}
BScroll.prototype.finishPullDown = function () {
this.pulling = false
this.resetPosition(this.options.bounceTime, ease.bounce)
}
BScroll.prototype.openPullDown = function (config = true) {
this.options.pullDownRefresh = config
this._initPullDown()
}
BScroll.prototype.closePullDown = function () {
this.options.pullDownRefresh = false
}
}
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