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- <template>
- <view class="u-checkbox" :style="[checkboxStyle]">
- <view class="u-checkbox__icon-wrap" @tap="toggle">
- <u-icon :class="iconClass" name="checkbox-mark" :size="iconSize" :color="iconColor" class="u-checkbox__icon" :style="[iconStyle]" />
- </view>
- <view class="u-label-class u-checkbox__label" @tap="onClickLabel" :style="{
- fontSize: labelSize + 'rpx'
- }">
- <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24)
- * @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(默认false)
- * @property {Boolean} label-disabled 点击文本是否可以操作checkbox(默认true)
- * @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: 'square'
- },
- // 是否为选中状态
- value: {
- type: Boolean,
- default: false
- },
- // 是否禁用
- disabled: {
- type: Boolean,
- default: false
- },
- // 是否禁止点击提示语选中复选框
- labelDisabled: {
- type: Boolean,
- default: false
- },
- // 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: 20
- },
- // label的字体大小,rpx单位
- labelSize: {
- type: [String, Number],
- default: 28
- },
- // 组件的整体大小
- size: {
- type: [String, Number],
- default: 34
- },
- },
- inject: {
- checkboxGroup: {
- // 添加默认值,是为了能让u-checkbox组件无需u-checkbox-group组件嵌套时单独使用
- default() {
- return {
- disabled: false,
- children: [],
- size: 34,
- activeColor: '#2979ff',
- max: 999999,
- emitEvent: () => {},
- width: '',
- wrap: false
- }
- }
- }
- },
- data() {
- return {
- parentDisabled: false,
- };
- },
- created() {
- this.parentDisabled = this.checkboxGroup.disabled;
- this.checkboxGroup.children.push(this);
- },
- computed: {
- iconStyle() {
- let style = {};
- if (this.checkboxActiveColor && this.value && !this.disabled && !this.parentDisabled) {
- style.borderColor = this.checkboxActiveColor;
- style.backgroundColor = this.checkboxActiveColor;
- }
- style.width = this.checkboxGroup.size + 'rpx';
- style.height = this.checkboxGroup.size + 'rpx';
- return style;
- },
- iconColor() {
- return this.value ? '#ffffff' : 'transparent';
- },
- iconClass() {
- let classs = [];
- classs.push('u-checkbox__icon--' + this.shape);
- if (this.value == true) classs.push('u-checkbox__icon--checked');
- if (this.disabled || this.parentDisabled) classs.push('u-checkbox__icon--disabled');
- if (this.value && (this.disabled || this.parentDisabled)) classs.push('u-checkbox__icon--disabled--checked');
- return classs;
- },
- // 激活的颜色,可能受checkboxGroup和本组件的activeColor影响
- // 本组件的activeColor值优先
- checkboxActiveColor() {
- return this.activeColor ? this.activeColor : this.checkboxGroup.activeColor;
- },
- checkboxStyle() {
- let style = {};
- if(this.checkboxGroup.width) {
- style.width = this.checkboxGroup.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 ${this.checkboxGroup.width}`;
- // #endif
- }
- if(this.checkboxGroup.wrap) {
- style.width = '100%';
- // #ifndef MP
- // H5和APP使用flex布局,将宽度设置100%,即可自动换行
- style.flex = '0 0 100%';
- // #endif
- }
- return style;
- }
- },
- methods: {
- onClickLabel() {
- if (!this.disabled && !this.labelDisabled && !this.parentDisabled) {
- this.setValue();
- }
- },
- toggle() {
- if (!this.disabled && !this.parentDisabled) {
- this.setValue();
- }
- },
- emitEvent() {
- this.$emit('change', {
- value: this.value,
- name: this.name
- })
- this.checkboxGroup.emitEvent();
- },
- // 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;
- this.checkboxGroup.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.$emit('input', !this.value);
- // 等待下一个周期再执行,因为this.$emit('input')作用于父组件,再反馈到子组件内部,需要时间
- this.$nextTick(function() {
- this.emitEvent();
- })
- } else if (checkedNum < this.checkboxGroup.max && this.value == false) {
- // 如果原来为未选中状态,需要选中的数量少于父组件中设置的max值,才可以选中
- this.$emit('input', !this.value);
- // 等待下一个周期再执行,因为this.$emit('input')作用于父组件,再反馈到子组件内部,需要时间
- this.$nextTick(function() {
- this.emitEvent();
- })
- }
- }
- }
- };
- </script>
- <style lang="scss" scoped>
- .u-checkbox {
- display: -webkit-flex;
- display: flex;
- -webkit-align-items: center;
- align-items: center;
- overflow: hidden;
- -webkit-user-select: none;
- user-select: none;
- line-height: 1.8;
- }
-
- .u-checkbox__icon-wrap,
- .u-checkbox__label {
- color: $u-content-color;
- }
- .u-checkbox__icon-wrap {
- -webkit-flex: none;
- flex: none;
- }
- .u-checkbox__icon {
- display: -webkit-flex;
- display: flex;
- -webkit-align-items: center;
- align-items: center;
- -webkit-justify-content: 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;
- }
- .u-checkbox__icon--circle {
- border-radius: 100%;
- }
- .u-checkbox__icon--square {
- border-radius: 3px;
- }
- .u-checkbox__icon--checked {
- color: #fff;
- background-color: #2979ff;
- border-color: #2979ff;
- }
- .u-checkbox__icon--disabled {
- background-color: #ebedf0;
- border-color: #c8c9cc;
- }
- .u-checkbox__icon--disabled--checked {
- color: #c8c9cc !important;
- }
- .u-checkbox__label {
- word-wrap: break-word;
- margin-left: 10rpx;
- margin-right: 24rpx;
- color: $u-content-color;
- font-size: 30rpx;
- }
- .u-checkbox__label--disabled {
- color: #c8c9cc;
- }
- .u-checkbox__label:empty {
- margin: 0;
- }
- </style>
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