285 lines
		
	
	
		
			8.3 KiB
		
	
	
	
		
			Python
		
	
	
	
			
		
		
	
	
			285 lines
		
	
	
		
			8.3 KiB
		
	
	
	
		
			Python
		
	
	
	
| <template>
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| 	<view class="u-checkbox" :style="[checkboxStyle]">
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| 		<view class="u-checkbox__icon-wrap" @tap="toggle" :class="[iconClass]" :style="[iconStyle]">
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| 			<u-icon class="u-checkbox__icon-wrap__icon" name="checkbox-mark" :size="checkboxIconSize" :color="iconColor"/>
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| 		</view>
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| 		<view class="u-checkbox__label" @tap="onClickLabel" :style="{
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| 			fontSize: $u.addUnit(labelSize)
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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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| 
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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20)
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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
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| 	 * @property {Boolean} label-disabled 是否禁止点击文本操作checkbox
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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: ''
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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: [String, Boolean],
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| 				default: ''
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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: [String, Boolean],
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| 				default: ''
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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: ''
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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: ''
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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: ''
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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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| 				newParams: {},
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| 			};
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| 		},
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| 		created() {
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| 			// 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
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| 			this.parent = this.$u.$parent.call(this, 'u-checkbox-group');
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| 			// 如果存在u-checkbox-group,将本组件的this塞进父组件的children中
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| 			this.parent && this.parent.children.push(this);
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| 		},
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| 		computed: {
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| 			// 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
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| 			isDisabled() {
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| 				return this.disabled !== '' ? this.disabled : this.parent ? this.parent.disabled : false;
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| 			},
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| 			// 是否禁用label点击
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| 			isLabelDisabled() {
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| 				return this.labelDisabled !== '' ? this.labelDisabled : this.parent ? this.parent.labelDisabled : false;
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| 			},
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| 			// 组件尺寸,对应size的值,默认值为34rpx
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| 			checkboxSize() {
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| 				return this.size ? this.size : (this.parent ? this.parent.size : 34);
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| 			},
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| 			// 组件的勾选图标的尺寸,默认20
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| 			checkboxIconSize() {
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| 				return this.iconSize ? this.iconSize : (this.parent ? this.parent.iconSize : 20);
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| 			},
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| 			// 组件选中激活时的颜色
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| 			elActiveColor() {
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| 				return this.activeColor ? this.activeColor : (this.parent ? this.parent.activeColor : 'primary');
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| 			},
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| 			// 组件的形状
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| 			elShape() {
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| 				return this.shape ? this.shape : (this.parent ? this.parent.shape : 'square');
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| 			},
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| 			iconStyle() {
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| 				let style = {};
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| 				// 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
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| 				if (this.elActiveColor && this.value && !this.isDisabled) {
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| 					style.borderColor = this.elActiveColor; 
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| 					style.backgroundColor = this.elActiveColor;
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| 				}
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| 				style.width = this.$u.addUnit(this.checkboxSize);
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| 				style.height = this.$u.addUnit(this.checkboxSize);
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| 				return style;
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| 			},
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| 			// 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
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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 classes = [];
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| 				classes.push('u-checkbox__icon-wrap--' + this.elShape);
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| 				if (this.value == true) classes.push('u-checkbox__icon-wrap--checked');
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| 				if (this.isDisabled) classes.push('u-checkbox__icon-wrap--disabled');
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| 				if (this.value && this.isDisabled) classes.push('u-checkbox__icon-wrap--disabled--checked');
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| 				// 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
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| 				return classes.join(' ');
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| 			},
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| 			checkboxStyle() {
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| 				let style = {};
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| 				if(this.parent && this.parent.width) {
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| 					style.width = this.parent.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 ${this.parent.width}`;
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| 					// #endif
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| 				}
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| 				if(this.parent && this.parent.wrap) {
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| 					style.width = '100%';
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| 					// #ifndef MP
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| 					// H5和APP使用flex布局,将宽度设置100%,即可自动换行
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| 					style.flex = '0 0 100%';
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| 					// #endif
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| 				}
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| 				return style;
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| 			}
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| 		},
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| 		methods: {
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| 			onClickLabel() {
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| 				if (!this.isLabelDisabled && !this.isDisabled) {
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| 					this.setValue();
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| 				}
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| 			},
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| 			toggle() {
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| 				if (!this.isDisabled) {
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| 					this.setValue();
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| 				}
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| 			},
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| 			emitEvent() {
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| 				this.$emit('change', {
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| 					value: !this.value,
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| 					name: this.name
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| 				})
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| 				// 执行父组件u-checkbox-group的事件方法
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| 				// 等待下一个周期再执行,因为this.$emit('input')作用于父组件,再反馈到子组件内部,需要时间
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| 				setTimeout(() => {
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| 					if(this.parent && this.parent.emitEvent) this.parent.emitEvent();
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| 				}, 80);
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| 			},
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| 			// 设置input的值,这里通过input事件,设置通过v-model绑定的组件的值
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| 			setValue() {
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| 				// 判断是否超过了可选的最大数量
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| 				let checkedNum = 0;
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| 				if(this.parent && this.parent.children) {
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| 					// 只要父组件的某一个子元素的value为true,就加1(已有的选中数量)
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| 					this.parent.children.map(val => {
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| 						if (val.value) checkedNum++;
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| 					})
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| 				}
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| 				// 如果原来为选中状态,那么可以取消
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| 				if (this.value == true) {
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| 					this.emitEvent();
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| 					this.$emit('input', !this.value);
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| 				} else {
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| 					// 如果超出最多可选项,提示
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| 					if(this.parent && checkedNum >= this.parent.max) {
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| 						return this.$u.toast(`最多可选${this.parent.max}项`);
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| 					}
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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.emitEvent();
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| 					this.$emit('input', !this.value);
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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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| 
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| <style lang="scss" scoped>
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| 	@import "../../libs/css/style.components.scss";
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| 
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| 	.u-checkbox {
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| 		/* #ifndef APP-NVUE */
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| 		display: inline-flex;
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| 		/* #endif */
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| 		align-items: center;
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| 		overflow: hidden;
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| 		user-select: none;
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| 		line-height: 1.8;
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| 		
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| 		&__icon-wrap {
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| 			color: $u-content-color;
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| 			flex: none;
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| 			display: -webkit-flex;
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| 			@include vue-flex;
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| 			align-items: 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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| 			/* #ifdef MP-TOUTIAO */
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| 			// 头条小程序兼容性问题,需要设置行高为0,否则图标偏下
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| 			&__icon {
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| 				line-height: 0;
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| 			}
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| 			/* #endif */
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| 			
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| 			&--circle {
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| 				border-radius: 100%;
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| 			}
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| 			
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| 			&--square {
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| 				border-radius: 6rpx;
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| 			}
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| 			
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| 			&--checked {
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| 				color: #fff;
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| 				background-color: $u-type-primary;
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| 				border-color: $u-type-primary;
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| 			}
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| 			
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| 			&--disabled {
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| 				background-color: #ebedf0;
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| 				border-color: #c8c9cc;
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| 			}
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| 			
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| 			&--disabled--checked {
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| 				color: #c8c9cc !important;
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| 			}
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| 		}
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| 	
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| 		&__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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| 			&--disabled {
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| 				color: #c8c9cc;
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| 			}
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| 		}
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| 	}
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| </style>
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