index.js
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import { VantComponent } from '../common/component';
import { touch } from '../mixins/touch';
VantComponent({
mixins: [touch],
props: {
disabled: Boolean,
max: {
type: Number,
value: 100
},
min: {
type: Number,
value: 0
},
step: {
type: Number,
value: 1
},
value: {
type: Number,
value: 0
},
barHeight: {
type: String,
value: '2px'
}
},
created: function created() {
this.updateValue(this.data.value);
},
methods: {
onTouchStart: function onTouchStart(event) {
if (this.data.disabled) return;
this.touchStart(event);
this.startValue = this.format(this.data.value);
},
onTouchMove: function onTouchMove(event) {
var _this = this;
if (this.data.disabled) return;
this.touchMove(event);
this.getRect('.van-slider').then(function (rect) {
var diff = _this.deltaX / rect.width * 100;
_this.updateValue(_this.startValue + diff);
});
},
onTouchEnd: function onTouchEnd() {
if (this.data.disabled) return;
this.updateValue(this.data.value, true);
},
onClick: function onClick(event) {
var _this2 = this;
if (this.data.disabled) return;
this.getRect(function (rect) {
var value = (event.detail.x - rect.left) / rect.width * 100;
_this2.updateValue(value, true);
});
},
updateValue: function updateValue(value, end) {
value = this.format(value);
this.setData({
value: value,
barStyle: "width: " + value + "%; height: " + this.data.barHeight + ";"
});
if (end) {
this.$emit('change', value);
}
},
format: function format(value) {
var _this$data = this.data,
max = _this$data.max,
min = _this$data.min,
step = _this$data.step;
return Math.round(Math.max(min, Math.min(value, max)) / step) * step;
}
}
});