231 lines
9.8 KiB
Vue
231 lines
9.8 KiB
Vue
<template>
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<uni-shadow-root class="vant-dist-slider-index"><view :class="'custom-class '+(utils.bem('slider', { disabled, vertical }))" :style="wrapperStyle" @click="onClick">
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<view :class="utils.bem('slider__bar')" :style="(barStyle)+'; '+(style({ backgroundColor: activeColor }))">
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<view v-if="range" :class="utils.bem('slider__button-wrapper-left')" :data-index="0" @touchstart="onTouchStart" @touchmove.stop.prevent="onTouchMove" @touchend="onTouchEnd" @touchcancel="onTouchEnd">
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<slot v-if="useButtonSlot" name="left-button"></slot>
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<view v-else :class="utils.bem('slider__button')"></view>
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</view>
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<view v-if="range" :class="utils.bem('slider__button-wrapper-right')" :data-index="1" @touchstart="onTouchStart" @touchmove.stop.prevent="onTouchMove" @touchend="onTouchEnd" @touchcancel="onTouchEnd">
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<slot v-if="useButtonSlot" name="right-button"></slot>
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<view v-else :class="utils.bem('slider__button')"></view>
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</view>
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<view v-if="(!range)" :class="utils.bem('slider__button-wrapper')" @touchstart="onTouchStart" @touchmove.stop.prevent="onTouchMove" @touchend="onTouchEnd" @touchcancel="onTouchEnd">
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<slot v-if="useButtonSlot" name="button"></slot>
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<view v-else :class="utils.bem('slider__button')"></view>
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</view>
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</view>
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</view></uni-shadow-root>
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</template>
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<wxs src="../wxs/utils.wxs" module="utils"></wxs><wxs src="../wxs/style.wxs" module="style"></wxs>
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<script>
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global['__wxRoute'] = 'vant/dist/slider/index'
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import { VantComponent } from '../common/component';
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import { touch } from '../mixins/touch';
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import { canIUseModel } from '../common/version';
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import { getRect, addUnit, nextTick } from '../common/utils';
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const DRAG_STATUS = {
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START: 'start',
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MOVING: 'moving',
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END: 'end',
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};
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VantComponent({
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mixins: [touch],
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props: {
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range: Boolean,
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disabled: Boolean,
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useButtonSlot: Boolean,
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activeColor: String,
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inactiveColor: String,
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max: {
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type: Number,
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value: 100,
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},
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min: {
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type: Number,
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value: 0,
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},
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step: {
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type: Number,
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value: 1,
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},
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value: {
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type: null,
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value: 0,
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observer(val) {
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if (val !== this.value) {
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this.updateValue(val);
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}
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},
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},
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vertical: Boolean,
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barHeight: null,
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},
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created() {
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this.updateValue(this.data.value);
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},
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methods: {
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onTouchStart(event) {
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if (this.data.disabled)
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return;
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const { index } = event.currentTarget.dataset;
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if (typeof index === 'number') {
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this.buttonIndex = index;
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}
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this.touchStart(event);
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this.startValue = this.format(this.value);
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this.newValue = this.value;
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if (this.isRange(this.newValue)) {
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this.startValue = this.newValue.map((val) => this.format(val));
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}
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else {
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this.startValue = this.format(this.newValue);
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}
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this.dragStatus = DRAG_STATUS.START;
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},
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onTouchMove(event) {
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if (this.data.disabled)
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return;
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if (this.dragStatus === DRAG_STATUS.START) {
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this.$emit('drag-start');
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}
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this.touchMove(event);
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this.dragStatus = DRAG_STATUS.MOVING;
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getRect(this, '.van-slider').then((rect) => {
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const { vertical } = this.data;
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const delta = vertical ? this.deltaY : this.deltaX;
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const total = vertical ? rect.height : rect.width;
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const diff = (delta / total) * this.getRange();
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if (this.isRange(this.startValue)) {
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this.newValue[this.buttonIndex] =
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this.startValue[this.buttonIndex] + diff;
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}
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else {
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this.newValue = this.startValue + diff;
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}
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this.updateValue(this.newValue, false, true);
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});
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},
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onTouchEnd() {
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if (this.data.disabled)
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return;
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if (this.dragStatus === DRAG_STATUS.MOVING) {
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this.dragStatus = DRAG_STATUS.END;
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nextTick(() => {
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this.updateValue(this.newValue, true);
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this.$emit('drag-end');
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});
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}
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},
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onClick(event) {
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if (this.data.disabled)
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return;
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const { min } = this.data;
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getRect(this, '.van-slider').then((rect) => {
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const { vertical } = this.data;
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const touch = event.touches[0];
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const delta = vertical
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? touch.clientY - rect.top
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: touch.clientX - rect.left;
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const total = vertical ? rect.height : rect.width;
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const value = Number(min) + (delta / total) * this.getRange();
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if (this.isRange(this.value)) {
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const [left, right] = this.value;
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const middle = (left + right) / 2;
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if (value <= middle) {
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this.updateValue([value, right], true);
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}
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else {
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this.updateValue([left, value], true);
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}
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}
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else {
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this.updateValue(value, true);
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}
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});
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},
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isRange(val) {
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const { range } = this.data;
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return range && Array.isArray(val);
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},
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handleOverlap(value) {
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if (value[0] > value[1]) {
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return value.slice(0).reverse();
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}
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return value;
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},
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updateValue(value, end, drag) {
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if (this.isRange(value)) {
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value = this.handleOverlap(value).map((val) => this.format(val));
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}
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else {
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value = this.format(value);
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}
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this.value = value;
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const { vertical } = this.data;
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const mainAxis = vertical ? 'height' : 'width';
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this.setData({
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wrapperStyle: `
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background: ${this.data.inactiveColor || ''};
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${vertical ? 'width' : 'height'}: ${addUnit(this.data.barHeight) || ''};
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`,
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barStyle: `
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${mainAxis}: ${this.calcMainAxis()};
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left: ${vertical ? 0 : this.calcOffset()};
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top: ${vertical ? this.calcOffset() : 0};
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${drag ? 'transition: none;' : ''}
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`,
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});
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if (drag) {
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this.$emit('drag', { value });
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}
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if (end) {
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this.$emit('change', value);
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}
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if ((drag || end) && canIUseModel()) {
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this.setData({ value });
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}
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},
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getScope() {
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return Number(this.data.max) - Number(this.data.min);
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},
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getRange() {
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const { max, min } = this.data;
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return max - min;
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},
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getOffsetWidth(current, min) {
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const scope = this.getScope();
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// 避免最小值小于最小step时出现负数情况
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return `${Math.max(((current - min) * 100) / scope, 0)}%`;
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},
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// 计算选中条的长度百分比
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calcMainAxis() {
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const { value } = this;
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const { min } = this.data;
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if (this.isRange(value)) {
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return this.getOffsetWidth(value[1], value[0]);
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}
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return this.getOffsetWidth(value, Number(min));
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},
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// 计算选中条的开始位置的偏移量
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calcOffset() {
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const { value } = this;
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const { min } = this.data;
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const scope = this.getScope();
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if (this.isRange(value)) {
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return `${((value[0] - Number(min)) * 100) / scope}%`;
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}
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return '0%';
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},
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format(value) {
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const { max, min, step } = this.data;
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return Math.round(Math.max(min, Math.min(value, max)) / step) * step;
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},
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},
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});
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export default global['__wxComponents']['vant/dist/slider/index']
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</script>
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<style platform="mp-weixin">
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@import '../common/index.css';.van-slider{background-color:var(--slider-inactive-background-color,#ebedf0);border-radius:999px;height:var(--slider-bar-height,2px);position:relative}.van-slider:before{bottom:calc(var(--padding-xs, 8px)*-1);content:"";left:0;position:absolute;right:0;top:calc(var(--padding-xs, 8px)*-1)}.van-slider__bar{background-color:var(--slider-active-background-color,#1989fa);border-radius:inherit;height:100%;position:relative;transition:all .2s;width:100%}.van-slider__button{background-color:var(--slider-button-background-color,#fff);border-radius:var(--slider-button-border-radius,50%);box-shadow:var(--slider-button-box-shadow,0 1px 2px rgba(0,0,0,.5));height:var(--slider-button-height,24px);width:var(--slider-button-width,24px)}.van-slider__button-wrapper,.van-slider__button-wrapper-right{position:absolute;right:0;top:50%;transform:translate3d(50%,-50%,0)}.van-slider__button-wrapper-left{left:0;position:absolute;top:50%;transform:translate3d(-50%,-50%,0)}.van-slider--disabled{opacity:var(--slider-disabled-opacity,.5)}.van-slider--vertical{display:inline-block;height:100%;width:var(--slider-bar-height,2px)}.van-slider--vertical .van-slider__button-wrapper,.van-slider--vertical .van-slider__button-wrapper-right{bottom:0;right:50%;top:auto;transform:translate3d(50%,50%,0)}.van-slider--vertical .van-slider__button-wrapper-left{left:auto;right:50%;top:0;transform:translate3d(50%,-50%,0)}.van-slider--vertical:before{bottom:0;left:-8px;right:-8px;top:0}
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</style> |