submenu.vue
2.48 KB
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<template>
<li :class="classes" @mouseenter="handleMouseenter" @mouseleave="handleMouseleave">
<div :class="[prefixCls + '-title']" v-el:reference>
<span><slot name="title"></slot></span>
<Icon type="ios-arrow-down"></Icon>
</div>
<ul :class="[prefixCls]" v-if="mode === 'vertical'"></ul>
<Drop v-else v-show="opened" placement="bottom" transition="slide-up" v-ref:drop><slot></slot></Drop>
</li>
</template>
<script>
import Drop from '../select/dropdown.vue';
import Icon from '../icon/icon.vue';
const prefixCls = 'ivu-menu';
export default {
name: 'Submenu',
components: { Icon, Drop },
props: {
key: {
type: [String, Number],
required: true
}
},
data () {
return {
prefixCls: prefixCls,
active: false,
opened: false
}
},
computed: {
classes () {
return [
`${prefixCls}-submenu`,
{
[`${prefixCls}-item-active`]: this.active,
[`${prefixCls}-opened`]: this.opened
}
]
},
mode () {
return this.$parent.mode;
}
},
methods: {
handleMouseenter () {
if (this.mode === 'vertical') return;
clearTimeout(this.timeout);
this.timeout = setTimeout(() => {
this.opened = true;
}, 250);
},
handleMouseleave () {
if (this.mode === 'vertical') return;
clearTimeout(this.timeout);
this.timeout = setTimeout(() => {
this.opened = false;
}, 150);
}
},
watch: {
mode (val) {
if (val === 'horizontal') {
this.$refs.drop.update();
}
},
opened (val) {
if (this.mode === 'vertical') return;
if (val) {
this.$refs.drop.update();
} else {
this.$refs.drop.destroy();
}
}
},
events: {
'on-menu-item-select' () {
this.opened = false;
return true;
}
}
}
</script>