submenu.vue
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<template>
<li :class="classes" @mouseenter="handleMouseenter" @mouseleave="handleMouseleave">
<div :class="[prefixCls + '-submenu-title']" ref="reference" @click.stop="handleClick" :style="titleStyle">
<slot name="title"></slot>
<Icon :type="arrowType" :custom="customArrowType" :size="arrowSize" :class="[prefixCls + '-submenu-title-icon']" />
</div>
<collapse-transition v-if="mode === 'vertical'">
<ul :class="[prefixCls]" v-show="opened"><slot></slot></ul>
</collapse-transition>
<transition name="slide-up" v-else>
<Drop
v-show="opened"
placement="bottom"
ref="drop"
:style="dropStyle"><ul :class="[prefixCls + '-drop-list']"><slot></slot></ul>
</Drop>
</transition>
</li>
</template>
<script>
import Drop from '../select/dropdown.vue';
import Icon from '../icon/icon.vue';
import CollapseTransition from '../base/collapse-transition';
import { getStyle, findComponentUpward, findComponentsDownward } from '../../utils/assist';
import Emitter from '../../mixins/emitter';
import mixin from './mixin';
const prefixCls = 'ivu-menu';
export default {
name: 'MewSubmenu',
mixins: [ Emitter, mixin ],
components: { Icon, Drop, CollapseTransition },
props: {
name: {
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`,
{
[`${prefixCls}-item-active`]: this.active && !this.hasParentSubmenu,
[`${prefixCls}-opened`]: this.opened,
[`${prefixCls}-submenu-disabled`]: this.disabled,
[`${prefixCls}-submenu-has-parent-submenu`]: this.hasParentSubmenu,
[`${prefixCls}-child-item-active`]: this.active
}
];
},
accordion () {
return this.menu.accordion;
},
dropStyle () {
let style = {};
if (this.dropWidth) style.minWidth = `${this.dropWidth}px`;
return style;
},
titleStyle () {
return this.hasParentSubmenu && this.mode !== 'horizontal' ? {
paddingLeft: 43 + (this.parentSubmenuNum - 1) * 24 + 'px'
} : {};
},
// 3.4.0, global setting customArrow 有值时，arrow 赋值空
arrowType () {
let type = 'ios-arrow-forward';
if (this.$IVIEW) {
if (this.$IVIEW.menu.customArrow) {
type = '';
} else if (this.$IVIEW.menu.arrow) {
type = this.$IVIEW.menu.arrow;
}
}
return type;
},
// 3.4.0, global setting
customArrowType () {
let type = '';
if (this.$IVIEW) {
if (this.$IVIEW.menu.customArrow) {
type = this.$IVIEW.menu.customArrow;
}
}
return type;
},
// 3.4.0, global setting
arrowSize () {
let size = '';
if (this.$IVIEW) {
if (this.$IVIEW.menu.arrowSize) {
size = this.$IVIEW.menu.arrowSize;
}
}
return size;
}
},
methods: {
handleMouseenter () {
if (this.disabled) return;
if (this.mode === 'vertical') return;
clearTimeout(this.timeout);
this.timeout = setTimeout(() => {
this.menu.updateOpenKeys(this.name);
this.opened = true;
}, 250);
},
handleMouseleave () {
if (this.disabled) return;
if (this.mode === 'vertical') return;
clearTimeout(this.timeout);
this.timeout = setTimeout(() => {
this.menu.updateOpenKeys(this.name);
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.$options.name === 'Submenu') item.opened = false;
});
}
this.opened = !opened;
this.menu.updateOpenKeys(this.name);
}
},
watch: {
mode (val) {
if (val === 'horizontal') {
this.$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.$refs.drop.destroy();
}
}
},
mounted () {
this.$on('on-menu-item-select', (name) => {
if (this.mode === 'horizontal') this.opened = false;
this.dispatch('MewMenu', 'on-menu-item-select', name);
return true;
});
this.$on('on-update-active-name', (status) => {
if (findComponentUpward(this, 'MewSubmenu')) this.dispatch('MewSubmenu', 'on-update-active-name', status);
if (findComponentsDownward(this, 'MewSubmenu')) findComponentsDownward(this, 'MewSubmenu').forEach(item => {
item.active = false;
});
this.active = status;
});
}
};
</script>