submenu.vue
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<template>
<li :class="classes" @mouseenter="handleMouseenter" @mouseleave="handleMouseleave">
<div :class="[prefixCls + '-submenu-title']" v-el:reference @click="handleClick">
<slot name="title"></slot>
<Icon type="ios-arrow-down" :class="[prefixCls + '-submenu-title-icon']"></Icon>
</div>
<ul :class="[prefixCls]" v-if="mode === 'vertical'" v-show="opened"><slot></slot></ul>
<Drop
v-else
v-show="opened"
placement="bottom"
transition="slide-up"
v-ref:drop
:style="dropStyle"><slot></slot></Drop>
</li>
</template>
<script>
import Drop from '../select/dropdown.vue';
import Icon from '../icon/icon.vue';
import { getStyle } from '../../utils/assist';
const prefixCls = 'ivu-menu';
export default {
name: 'Submenu',
components: { Icon, Drop },
props: {
key: {
type: [String, Number],
required: true
},
disabled: {
type: Boolean,
default: false
}
},
data () {
return {
prefixCls: prefixCls,
active: false,
opened: false,
dropWidth: parseFloat(getStyle(this.$el, 'width'))
};
},
computed: {
classes () {
return [
`${prefixCls}-submenu`,
{
[`${prefixCls}-item-active`]: this.active,
[`${prefixCls}-opened`]: this.opened,
[`${prefixCls}-submenu-disabled`]: this.disabled
}
];
},
mode () {
return this.$parent.mode;
},
accordion () {
return this.$parent.accordion;
},
dropStyle () {
let style = {};
if (this.dropWidth) style.minWidth = `${this.dropWidth}px`;
return style;
}
},
methods: {
handleMouseenter () {
if (this.disabled) return;
if (this.mode === 'vertical') return;
clearTimeout(this.timeout);
this.timeout = setTimeout(() => {
this.$parent.updateOpenKeys(this.key);
this.opened = true;
}, 250);
},
handleMouseleave () {
if (this.disabled) return;
if (this.mode === 'vertical') return;
clearTimeout(this.timeout);
this.timeout = setTimeout(() => {
this.$parent.updateOpenKeys(this.key);
this.opened = false;
}, 150);
},
handleClick () {
if (this.disabled) return;
if (this.mode === 'horizontal') return;
const opened = this.opened;
if (this.accordion) {
this.$parent.$children.forEach(item => {
if (item.$options.name === 'Submenu') item.opened = false;
});
}
this.opened = !opened;
this.$parent.updateOpenKeys(this.key);
}
},
watch: {
mode (val) {
if (val === 'horizontal') {
this.$refs.drop.update();
}
},
opened (val) {
if (this.mode === 'vertical') return;
if (val) {
// set drop a width to fixed when menu has fixed position
this.dropWidth = parseFloat(getStyle(this.$el, 'width'));
this.$refs.drop.update();
} else {
this.$refs.drop.destroy();
}
}
},
events: {
'on-menu-item-select' () {
if (this.mode === 'horizontal') this.opened = false;
return true;
}
}
};
</script>