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- <template>
- <view class="u-checkbox" :style="[checkboxStyle]">
- <view class="u-checkbox__icon-wrap" @tap="toggle" :class="[iconClass]" :style="[iconStyle]">
- <u-icon class="u-checkbox__icon-wrap__icon" name="checkbox-mark" :size="checkboxIconSize" :color="iconColor"/>
- </view>
- <view class="u-checkbox__label" @tap="onClickLabel" :style="{
- fontSize: $u.addUnit(labelSize)
- }">
- <slot />
- </view>
- </view>
- </template>
- <script>
- /**
- * checkbox 复选框
- * @description 该组件需要搭配checkboxGroup组件使用,以便用户进行操作时,获得当前复选框组的选中情况。
- * @tutorial https://www.uviewui.com/components/checkbox.html
- * @property {String Number} icon-size 图标大小,单位rpx(默认20)
- * @property {String Number} label-size label字体大小,单位rpx(默认28)
- * @property {String Number} name checkbox组件的标示符
- * @property {String} shape 形状,见官网说明(默认circle)
- * @property {Boolean} disabled 是否禁用
- * @property {Boolean} label-disabled 是否禁止点击文本操作checkbox
- * @property {String} active-color 选中时的颜色,如设置CheckboxGroup的active-color将失效
- * @event {Function} change 某个checkbox状态发生变化时触发,回调为一个对象
- * @example <u-checkbox v-model="checked" :disabled="false">天涯</u-checkbox>
- */
- export default {
- name: "u-checkbox",
- props: {
- // checkbox的名称
- name: {
- type: [String, Number],
- default: ''
- },
- // 形状,square为方形,circle为原型
- shape: {
- type: String,
- default: ''
- },
- // 是否为选中状态
- value: {
- type: Boolean,
- default: false
- },
- // 是否禁用
- disabled: {
- type: [String, Boolean],
- default: ''
- },
- // 是否禁止点击提示语选中复选框
- labelDisabled: {
- type: [String, Boolean],
- default: ''
- },
- // 选中状态下的颜色,如设置此值,将会覆盖checkboxGroup的activeColor值
- activeColor: {
- type: String,
- default: ''
- },
- // 图标的大小,单位rpx
- iconSize: {
- type: [String, Number],
- default: ''
- },
- // label的字体大小,rpx单位
- labelSize: {
- type: [String, Number],
- default: ''
- },
- // 组件的整体大小
- size: {
- type: [String, Number],
- default: ''
- },
- },
- data() {
- return {
- parentDisabled: false,
- newParams: {},
- };
- },
- created() {
- // 支付宝小程序不支持provide/inject,所以使用这个方法获取整个父组件,在created定义,避免循环应用
- this.parent = this.$u.$parent.call(this, 'u-checkbox-group');
- // 如果存在u-checkbox-group,将本组件的this塞进父组件的children中
- this.parent && this.parent.children.push(this);
- },
- computed: {
- // 是否禁用,如果父组件u-checkbox-group禁用的话,将会忽略子组件的配置
- isDisabled() {
- return this.disabled !== '' ? this.disabled : this.parent ? this.parent.disabled : false;
- },
- // 是否禁用label点击
- isLabelDisabled() {
- return this.labelDisabled !== '' ? this.labelDisabled : this.parent ? this.parent.labelDisabled : false;
- },
- // 组件尺寸,对应size的值,默认值为34rpx
- checkboxSize() {
- return this.size ? this.size : (this.parent ? this.parent.size : 34);
- },
- // 组件的勾选图标的尺寸,默认20
- checkboxIconSize() {
- return this.iconSize ? this.iconSize : (this.parent ? this.parent.iconSize : 20);
- },
- // 组件选中激活时的颜色
- elActiveColor() {
- return this.activeColor ? this.activeColor : (this.parent ? this.parent.activeColor : 'primary');
- },
- // 组件的形状
- elShape() {
- return this.shape ? this.shape : (this.parent ? this.parent.shape : 'square');
- },
- iconStyle() {
- let style = {};
- // 既要判断是否手动禁用,还要判断用户v-model绑定的值,如果绑定为false,那么也无法选中
- if (this.elActiveColor && this.value && !this.isDisabled) {
- style.borderColor = this.elActiveColor;
- style.backgroundColor = this.elActiveColor;
- }
- style.width = this.$u.addUnit(this.checkboxSize);
- style.height = this.$u.addUnit(this.checkboxSize);
- return style;
- },
- // checkbox内部的勾选图标,如果选中状态,为白色,否则为透明色即可
- iconColor() {
- return this.value ? '#ffffff' : 'transparent';
- },
- iconClass() {
- let classes = [];
- classes.push('u-checkbox__icon-wrap--' + this.elShape);
- if (this.value == true) classes.push('u-checkbox__icon-wrap--checked');
- if (this.isDisabled) classes.push('u-checkbox__icon-wrap--disabled');
- if (this.value && this.isDisabled) classes.push('u-checkbox__icon-wrap--disabled--checked');
- // 支付宝小程序无法动态绑定一个数组类名,否则解析出来的结果会带有",",而导致失效
- return classes.join(' ');
- },
- checkboxStyle() {
- let style = {};
- if(this.parent && this.parent.width) {
- style.width = this.parent.width;
- // #ifdef MP
- // 各家小程序因为它们特殊的编译结构,使用float布局
- style.float = 'left';
- // #endif
- // #ifndef MP
- // H5和APP使用flex布局
- style.flex = `0 0 ${this.parent.width}`;
- // #endif
- }
- if(this.parent && this.parent.wrap) {
- style.width = '100%';
- // #ifndef MP
- // H5和APP使用flex布局,将宽度设置100%,即可自动换行
- style.flex = '0 0 100%';
- // #endif
- }
- return style;
- }
- },
- methods: {
- onClickLabel() {
- if (!this.isLabelDisabled && !this.isDisabled) {
- this.setValue();
- }
- },
- toggle() {
- if (!this.isDisabled) {
- this.setValue();
- }
- },
- emitEvent() {
- this.$emit('change', {
- value: !this.value,
- name: this.name
- })
- // 执行父组件u-checkbox-group的事件方法
- // 等待下一个周期再执行,因为this.$emit('input')作用于父组件,再反馈到子组件内部,需要时间
- setTimeout(() => {
- if(this.parent && this.parent.emitEvent) this.parent.emitEvent();
- }, 80);
- },
- // 设置input的值,这里通过input事件,设置通过v-model绑定的组件的值
- setValue() {
- // 判断是否超过了可选的最大数量
- let checkedNum = 0;
- if(this.parent && this.parent.children) {
- // 只要父组件的某一个子元素的value为true,就加1(已有的选中数量)
- this.parent.children.map(val => {
- if (val.value) checkedNum++;
- })
- }
- // 如果原来为选中状态,那么可以取消
- if (this.value == true) {
- this.emitEvent();
- this.$emit('input', !this.value);
- } else {
- // 如果超出最多可选项,提示
- if(this.parent && checkedNum >= this.parent.max) {
- return this.$u.toast(`最多可选${this.parent.max}项`);
- }
- // 如果原来为未选中状态,需要选中的数量少于父组件中设置的max值,才可以选中
- this.emitEvent();
- this.$emit('input', !this.value);
- }
- }
- }
- };
- </script>
- <style lang="scss" scoped>
- @import "../../libs/css/style.components.scss";
- .u-checkbox {
- /* #ifndef APP-NVUE */
- display: inline-flex;
- /* #endif */
- align-items: center;
- overflow: hidden;
- user-select: none;
- line-height: 1.8;
-
- &__icon-wrap {
- color: $u-content-color;
- flex: none;
- display: -webkit-flex;
- @include vue-flex;
- align-items: center;
- justify-content: center;
- box-sizing: border-box;
- width: 42rpx;
- height: 42rpx;
- color: transparent;
- text-align: center;
- transition-property: color, border-color, background-color;
- font-size: 20px;
- border: 1px solid #c8c9cc;
- transition-duration: 0.2s;
-
- /* #ifdef MP-TOUTIAO */
- // 头条小程序兼容性问题,需要设置行高为0,否则图标偏下
- &__icon {
- line-height: 0;
- }
- /* #endif */
-
- &--circle {
- border-radius: 100%;
- }
-
- &--square {
- border-radius: 6rpx;
- }
-
- &--checked {
- color: #fff;
- background-color: $u-type-primary;
- border-color: $u-type-primary;
- }
-
- &--disabled {
- background-color: #ebedf0;
- border-color: #c8c9cc;
- }
-
- &--disabled--checked {
- color: #c8c9cc !important;
- }
- }
-
- &__label {
- word-wrap: break-word;
- margin-left: 10rpx;
- margin-right: 24rpx;
- color: $u-content-color;
- font-size: 30rpx;
-
- &--disabled {
- color: #c8c9cc;
- }
- }
- }
- </style>
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