index.js
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import { VantComponent } from '../common/component';
import { touch } from '../mixins/touch';
var THRESHOLD = 0.15;
VantComponent({
props: {
disabled: Boolean,
leftWidth: {
type: Number,
value: 0
},
rightWidth: {
type: Number,
value: 0
},
asyncClose: Boolean
},
mixins: [touch],
data: {
offset: 0,
draging: false
},
computed: {
wrapperStyle: function wrapperStyle() {
var _this$data = this.data,
offset = _this$data.offset,
draging = _this$data.draging;
return "\n transform: translate3d(" + offset + "px, 0, 0);\n transition: " + (draging ? 'none' : '.6s cubic-bezier(0.18, 0.89, 0.32, 1)') + ";\n ";
}
},
methods: {
onTransitionend: function onTransitionend() {
this.swipe = false;
},
open: function open(position) {
var _this$data2 = this.data,
leftWidth = _this$data2.leftWidth,
rightWidth = _this$data2.rightWidth;
var offset = position === 'left' ? leftWidth : -rightWidth;
this.swipeMove(offset);
this.resetSwipeStatus();
},
close: function close() {
this.setData({
offset: 0
});
},
resetSwipeStatus: function resetSwipeStatus() {
this.swiping = false;
this.opened = true;
},
swipeMove: function swipeMove(offset) {
if (offset === void 0) {
offset = 0;
}
this.setData({
offset: offset
});
offset && (this.swiping = true);
!offset && (this.opened = false);
},
swipeLeaveTransition: function swipeLeaveTransition(direction) {
var _this$data3 = this.data,
offset = _this$data3.offset,
leftWidth = _this$data3.leftWidth,
rightWidth = _this$data3.rightWidth;
var threshold = this.opened ? 1 - THRESHOLD : THRESHOLD; // right
if (direction > 0 && -offset > rightWidth * threshold && rightWidth > 0) {
this.open('right'); // left
} else if (direction < 0 && offset > leftWidth * threshold && leftWidth > 0) {
this.open('left');
} else {
this.swipeMove();
}
},
startDrag: function startDrag(event) {
if (this.data.disabled) {
return;
}
this.setData({
draging: true
});
this.touchStart(event);
if (this.opened) {
this.startX -= this.data.offset;
}
},
onDrag: function onDrag(event) {
if (this.data.disabled) {
return;
}
this.touchMove(event);
var deltaX = this.deltaX;
var _this$data4 = this.data,
leftWidth = _this$data4.leftWidth,
rightWidth = _this$data4.rightWidth;
if (deltaX < 0 && (-deltaX > rightWidth || !rightWidth) || deltaX > 0 && (deltaX > leftWidth || deltaX > 0 && !leftWidth)) {
return;
}
if (this.direction === 'horizontal') {
this.swipeMove(deltaX);
}
},
endDrag: function endDrag() {
if (this.data.disabled) {
return;
}
this.setData({
draging: false
});
if (this.swiping) {
this.swipeLeaveTransition(this.data.offset > 0 ? -1 : 1);
}
},
onClick: function onClick(event) {
var _event$currentTarget$ = event.currentTarget.dataset.key,
position = _event$currentTarget$ === void 0 ? 'outside' : _event$currentTarget$;
this.$emit('click', position);
if (!this.data.offset) {
return;
}
if (this.data.asyncClose) {
this.$emit('close', {
position: position,
instance: this
});
} else {
this.swipeMove(0);
}
}
}
});