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node_modules/uview-ui/components/u-checkbox/u-checkbox.vue
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278
node_modules/uview-ui/components/u-checkbox/u-checkbox.vue
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<template>
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<view class="u-checkbox" :style="[checkboxStyle]">
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<view class="u-checkbox__icon-wrap" @tap="toggle">
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<u-icon :class="iconClass" name="checkbox-mark" :size="iconSize" :color="iconColor" class="u-checkbox__icon" :style="[iconStyle]" />
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</view>
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<view class="u-label-class u-checkbox__label" @tap="onClickLabel" :style="{
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fontSize: labelSize + 'rpx'
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}">
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<slot />
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</view>
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</view>
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</template>
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<script>
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/**
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* checkbox 复选框
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* @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。
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* @tutorial https://www.uviewui.com/components/checkbox.html
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* @property {String Number} icon-size 图标大小，单位rpx（默认24）
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* @property {String Number} label-size label字体大小，单位rpx（默认28）
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* @property {String Number} name checkbox组件的标示符
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* @property {String} shape 形状，见官网说明（默认circle）
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* @property {Boolean} disabled 是否禁用（默认false）
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* @property {Boolean} label-disabled 点击文本是否可以操作checkbox（默认true）
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* @property {String} active-color 选中时的颜色，如设置CheckboxGroup的active-color将失效
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* @event {Function} change 某个checkbox状态发生变化时触发，回调为一个对象
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* @example <u-checkbox v-model="checked" :disabled="false">天涯</u-checkbox>
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*/
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export default {
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name: "u-checkbox",
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props: {
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// checkbox的名称
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name: {
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type: [String, Number],
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default: ''
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},
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// 形状，square为方形，circle为原型
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shape: {
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type: String,
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default: 'square'
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},
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// 是否为选中状态
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value: {
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type: Boolean,
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default: false
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},
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// 是否禁用
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disabled: {
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type: Boolean,
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default: false
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},
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// 是否禁止点击提示语选中复选框
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labelDisabled: {
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type: Boolean,
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default: false
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},
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// 选中状态下的颜色，如设置此值，将会覆盖checkboxGroup的activeColor值
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activeColor: {
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type: String,
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default: ''
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},
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// 图标的大小，单位rpx
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iconSize: {
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type: [String, Number],
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default: 20
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},
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// label的字体大小，rpx单位
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labelSize: {
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type: [String, Number],
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default: 28
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},
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// 组件的整体大小
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size: {
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type: [String, Number],
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default: 34
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},
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},
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inject: {
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checkboxGroup: {
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// 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
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default() {
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return {
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disabled: false,
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children: [],
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size: 34,
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activeColor: '#2979ff',
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max: 999999,
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emitEvent: () => {},
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width: '',
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wrap: false
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}
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}
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}
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},
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data() {
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return {
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parentDisabled: false,
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};
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},
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created() {
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this.parentDisabled = this.checkboxGroup.disabled;
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this.checkboxGroup.children.push(this);
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},
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computed: {
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iconStyle() {
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let style = {};
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if (this.checkboxActiveColor && this.value && !this.disabled && !this.parentDisabled) {
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style.borderColor = this.checkboxActiveColor;
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style.backgroundColor = this.checkboxActiveColor;
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}
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style.width = this.checkboxGroup.size + 'rpx';
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style.height = this.checkboxGroup.size + 'rpx';
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return style;
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},
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iconColor() {
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return this.value ? '#ffffff' : 'transparent';
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},
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iconClass() {
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let classs = [];
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classs.push('u-checkbox__icon--' + this.shape);
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if (this.value == true) classs.push('u-checkbox__icon--checked');
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if (this.disabled || this.parentDisabled) classs.push('u-checkbox__icon--disabled');
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if (this.value && (this.disabled || this.parentDisabled)) classs.push('u-checkbox__icon--disabled--checked');
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return classs;
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},
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// 激活的颜色，可能受checkboxGroup和本组件的activeColor影响
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// 本组件的activeColor值优先
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checkboxActiveColor() {
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return this.activeColor ? this.activeColor : this.checkboxGroup.activeColor;
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},
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checkboxStyle() {
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let style = {};
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if(this.checkboxGroup.width) {
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style.width = this.checkboxGroup.width;
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// #ifdef MP
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// 各家小程序因为它们特殊的编译结构，使用float布局
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style.float = 'left';
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// #endif
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// #ifndef MP
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// H5和APP使用flex布局
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style.flex = `0 0 ${this.checkboxGroup.width}`;
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// #endif
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}
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if(this.checkboxGroup.wrap) {
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style.width = '100%';
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// #ifndef MP
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// H5和APP使用flex布局，将宽度设置100%，即可自动换行
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style.flex = '0 0 100%';
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// #endif
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}
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return style;
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}
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},
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methods: {
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onClickLabel() {
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if (!this.disabled && !this.labelDisabled && !this.parentDisabled) {
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this.setValue();
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}
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},
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toggle() {
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if (!this.disabled && !this.parentDisabled) {
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this.setValue();
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}
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},
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emitEvent() {
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this.$emit('change', {
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value: this.value,
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name: this.name
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})
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this.checkboxGroup.emitEvent();
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},
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// 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
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setValue() {
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// 判断是否超过了可选的最大数量
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let checkedNum = 0;
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this.checkboxGroup.children.map(val => {
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if (val.value) checkedNum++;
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})
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// 如果原来为选中状态，那么可以取消
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if (this.value == true) {
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this.$emit('input', !this.value);
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// 等待下一个周期再执行，因为this.$emit('input')作用于父组件，再反馈到子组件内部，需要时间
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this.$nextTick(function() {
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this.emitEvent();
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})
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} else if (checkedNum < this.checkboxGroup.max && this.value == false) {
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// 如果原来为未选中状态，需要选中的数量少于父组件中设置的max值，才可以选中
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this.$emit('input', !this.value);
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// 等待下一个周期再执行，因为this.$emit('input')作用于父组件，再反馈到子组件内部，需要时间
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this.$nextTick(function() {
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this.emitEvent();
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})
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}
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}
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}
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};
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</script>
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<style lang="scss" scoped>
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.u-checkbox {
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display: -webkit-flex;
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display: flex;
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-webkit-align-items: center;
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align-items: center;
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overflow: hidden;
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-webkit-user-select: none;
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user-select: none;
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line-height: 1.8;
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}
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.u-checkbox__icon-wrap,
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.u-checkbox__label {
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color: $u-content-color;
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}
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.u-checkbox__icon-wrap {
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-webkit-flex: none;
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flex: none;
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}
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.u-checkbox__icon {
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display: -webkit-flex;
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display: flex;
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-webkit-align-items: center;
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align-items: center;
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-webkit-justify-content: center;
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justify-content: center;
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box-sizing: border-box;
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width: 42rpx;
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height: 42rpx;
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color: transparent;
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text-align: center;
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transition-property: color, border-color, background-color;
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font-size: 20px;
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border: 1px solid #c8c9cc;
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transition-duration: 0.2s;
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}
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.u-checkbox__icon--circle {
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border-radius: 100%;
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}
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.u-checkbox__icon--square {
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border-radius: 3px;
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}
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.u-checkbox__icon--checked {
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color: #fff;
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background-color: #2979ff;
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border-color: #2979ff;
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}
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.u-checkbox__icon--disabled {
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background-color: #ebedf0;
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border-color: #c8c9cc;
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}
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.u-checkbox__icon--disabled--checked {
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color: #c8c9cc !important;
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}
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.u-checkbox__label {
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word-wrap: break-word;
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margin-left: 10rpx;
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margin-right: 24rpx;
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color: $u-content-color;
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font-size: 30rpx;
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}
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.u-checkbox__label--disabled {
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color: #c8c9cc;
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}
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.u-checkbox__label:empty {
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margin: 0;
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}
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</style>
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