index.js
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// #ifndef APP-PLUS || MP-WEIXIN || H5
export default {
watch: {
value(val) {
this.initData(val)
},
endValue(val) {
if (this.section) {
this.initEndData(val)
}
}
},
data() {
return {
drag: false,
startX: 0,
endX: 0,
lastLeft: 0,
useLast: 0,
lastRight: 0,
useRight: 0,
moveLeft: 'translate3d(0,0,0)',
transLeft: 'translate3d(-100%, 0, 0)',
moveRight: 'translate3d(0,0,0)',
transRight: 'translate3d(100%, 0, 0)',
isRight: false
}
},
mounted() {
this.initData(this.value)
if (this.section) {
this.initEndData(this.endValue)
}
},
methods: {
initData(value) {
this.startX = 0;
this.lastLeft = 0;
this.drag = false;
this.styleChange(Number(value), true)
},
initEndData(value) {
this.endX = 0;
this.lastRight = 0;
this.drag = false;
value = Number(this.max) - Number(value) + Number(this.min)
this.styleSectionChange(value, true)
},
format(value) {
value = Number(value)
let step = Number(this.step)
return Math.round(Math.max(Number(this.min), Math.min(value, Number(this.max))) / step) * step;
},
touchstart(e) {
let touch = e.changedTouches[0] || e.touches[0];
this.startX = touch.clientX
},
endTouchstart(e) {
let touch = e.changedTouches[0] || e.touches[0];
this.endX = touch.clientX
},
changeValue(value, isStart, isEnd) {
var params = {
value: value,
isStart: isStart
}
if (isEnd) {
this.change(params)
} else {
this.changing(params)
}
},
styleChange(value, isEnd) {
value = this.format(value);
if (this.section) {
value = value > this.end ? this.end : value;
}
this.changeValue(value, true, isEnd)
const min = Number(this.min)
const max = Number(this.max)
var dvalue = max - min;
var maxWidth = Number(this.width) - Number(this.blockWidth);
var width = (value - min) / dvalue * maxWidth;
this.lastLeft = width
if (isEnd) {
this.useLast = width
}
this.transLeft = `translate3d(-${Number(this.width)-width}px,0,0)`
this.moveLeft = `translate3d(${width}px,0,0)`
this.isRight = value === max
},
styleSectionChange(value, isEnd) {
value = this.format(value);
const min = Number(this.min)
const max = Number(this.max)
var total = max + min;
var val = total - value;
val = val < this.start ? this.start : val;
value = total - val;
this.changeValue(val, false, isEnd)
var dvalue = max - min;
var maxWidth = Number(this.width) - Number(this.blockWidth);
var width = (value - min) / dvalue * maxWidth;
this.lastRight = width
if (isEnd) {
this.useRight = width
}
this.transRight = `translate3d(${Number(this.width)-width}px,0,0)`
this.moveRight = `translate3d(-${width}px,0,0)`
},
touchmove(e) {
if (this.disabled) return;
let touch = e.changedTouches[0] || e.touches[0];
let pageX = touch.clientX
let left = pageX - this.startX + (this.useLast || 0);
this.drag = true
left = left < 0 ? 0 : left;
let maxWidth = Number(this.width) - Number(this.blockWidth);
left = left >= maxWidth ? maxWidth : left;
let dvalue = Number(this.max) - Number(this.min);
let value = (left / maxWidth) * dvalue + Number(this.min);
this.lastLeft = left
this.styleChange(value, false)
},
endTouchmove(e) {
if (this.disabled) return;
let touch = e.changedTouches[0] || e.touches[0];
let pageX = touch.clientX;
this.drag = true
let left = this.endX - pageX + (this.useRight || 0);
left = left < 0 ? 0 : left;
let maxWidth = Number(this.width) - Number(this.blockWidth);
left = left >= maxWidth ? maxWidth : left;
let dvalue = Number(this.max) - Number(this.min);
let value = (left / maxWidth) * dvalue + Number(this.min);
// this.endX = pageX
this.lastRight = left
this.styleSectionChange(value, false)
},
touchend(e) {
if (this.disabled) return;
if (this.drag) {
let maxWidth = Number(this.width) - Number(this.blockWidth);
let dvalue = Number(this.max) - Number(this.min);
let value = (this.lastLeft / maxWidth) * dvalue + Number(this.min);
this.styleChange(value, true)
this.drag = false
}
},
endTouchend(e) {
if (this.disabled) return;
if (this.drag) {
let maxWidth = Number(this.width) - Number(this.blockWidth);
let dvalue = Number(this.max) - Number(this.min);
let value = (this.lastRight / maxWidth) * dvalue + Number(this.min);
this.styleSectionChange(value, true)
this.drag = false
}
}
}
}
// #endif
// #ifdef APP-PLUS|| MP-WEIXIN || H5
export default {}
// #endif