add Dropdown component

add Dropdown component

src/components/dropdown/dropdown-item.vue

@@ -0,0 +1,50 @@
+<template>
+    <li :class="classes" @click="handleClick"><slot></slot></li>
+</template>
+<script>
+    const prefixCls = 'ivu-dropdown-item';
+
+    export default {
+        props: {
+            key: {
+                type: [String, Number]
+            },
+            disabled: {
+                type: Boolean,
+                default: false
+            },
+            selected: {
+                type: Boolean,
+                default: false
+            },
+            divided: {
+                type: Boolean,
+                default: false
+            }
+        },
+        computed: {
+            classes () {
+                return [
+                    `${prefixCls}`,
+                    {
+                        [`${prefixCls}-disabled`]: this.disabled,
+                        [`${prefixCls}-selected`]: this.selected,
+                        [`${prefixCls}-divided`]: this.divided
+                    }
+                ]
+            }
+        },
+        methods: {
+            handleClick () {
+                if (this.disabled) {
+                    this.$nextTick(() => {
+                        this.$parent.$parent.visible = true;
+                    });
+                } else {
+                    this.$parent.$parent.visible = false;
+                }
+                this.$parent.$parent.$emit('on-click', this.key);
+            }
+        }
+    }
+</script>

src/components/dropdown/dropdown-menu.vue

@@ -0,0 +1,6 @@
+<template>
+    <ul class="ivu-dropdown-menu"><slot></slot></ul>
+</template>
+<script>
+    export default {}
+</script>

src/components/dropdown/dropdown.vue

@@ -0,0 +1,89 @@
+<template>
+    <div
+        :class="[prefixCls]"
+        @click="handleClick"
+        @mouseenter="handleMouseenter"
+        @mouseleave="handleMouseleave"
+        v-clickoutside="handleClose">
+        <div :class="[prefixCls-rel]" v-el:reference><slot></slot></div>
+        <Drop v-show="visible" :placement="placement" transition="slide-up"><slot name="list"></slot></Drop>
+    </div>
+</template>
+<script>
+    import Drop from '../select/dropdown.vue';
+    import clickoutside from '../../directives/clickoutside';
+    import { oneOf } from '../../utils/assist';
+
+    const prefixCls = 'ivu-dropdown';
+
+    export default {
+        directives: { clickoutside },
+        components: { Drop },
+        props: {
+            trigger: {
+                validator (value) {
+                    return oneOf(value, ['click', 'hover']);
+                },
+                default: 'hover'
+            },
+            align: {
+                validator (value) {
+                    return oneOf(value, ['left', 'center', 'right']);
+                },
+                default: 'center'
+            }
+        },
+        data () {
+            return {
+                prefixCls: prefixCls,
+                visible: false
+            }
+        },
+        computed: {
+            placement () {
+                return this.align === 'left' ? 'bottom-start' : this.align === 'center' ? 'bottom' : 'bottom-end';
+            }
+        },
+        methods: {
+            handleClick () {
+                if (this.trigger !== 'click') {
+                    return false;
+                }
+                this.visible = !this.visible;
+            },
+            handleMouseenter () {
+                if (this.trigger !== 'hover') {
+                    return false;
+                }
+                clearTimeout(this.timeout);
+                this.timeout = setTimeout(() => {
+                    this.visible = true;
+                }, 250);
+            },
+            handleMouseleave () {
+                if (this.trigger !== 'hover') {
+                    return false;
+                }
+                clearTimeout(this.timeout);
+                this.timeout = setTimeout(() => {
+                    this.visible = false;
+                }, 150);
+            },
+            handleClose () {
+                if (this.trigger !== 'click') {
+                    return false;
+                }
+                this.visible = false;
+            }
+        },
+        watch: {
+            visible (val) {
+                if (val) {
+                    this.$broadcast('on-update-popper');
+                } else {
+                    this.$broadcast('on-destroy-popper');
+                }
+            }
+        }
+    }
+</script>

src/components/dropdown/index.js

@@ -0,0 +1,7 @@
+import Dropdown from './dropdown.vue';
+import DropdownMenu from './dropdown-menu.vue';
+import DropdownItem from './dropdown-item.vue';
+
+Dropdown.Menu = DropdownMenu;
+Dropdown.Item = DropdownItem;
+export default Dropdown;

src/components/select/dropdown.vue

@@ -5,6 +5,12 @@
     import Popper from 'popper.js';
 
     export default {
+        props: {
+            placement: {
+                type: String,
+                default: 'bottom-start'
+            }
+        },
         data () {
             return {
                 popper: null
@@ -20,7 +26,7 @@
                     this.$nextTick(() => {
                         this.popper = new Popper(this.$parent.$els.reference, this.$el, {
                             gpuAcceleration: false,
-                            placement: 'bottom-start',
+                            placement: this.placement,
                             boundariesPadding: 0,
                             forceAbsolute: true,
                             boundariesElement: 'body'

src/index.js

@@ -12,6 +12,7 @@ import Cascader from './components/cascader';
 import Checkbox from './components/checkbox';
 import Circle from './components/circle';
 import Collapse from './components/collapse';
+import Dropdown from './components/dropdown';
 import Icon from './components/icon';
 import Input from './components/input';
 import InputNumber from './components/input-number';
@@ -49,6 +50,9 @@ const iview = {
     Checkbox,
     CheckboxGroup: Checkbox.Group,
     Circle,
+    Dropdown,
+    DropdownItem: Dropdown.Item,
+    DropdownMenu: Dropdown.Menu,
     iCol: Col,
     Collapse,
     Icon,

src/styles/components/dropdown.less

@@ -0,0 +1,17 @@
+@dropdown-prefix-cls: ~"@{css-prefix}dropdown";
+@dropdown-item-prefix-cls: ~"@{dropdown-prefix-cls}-item";
+
+.@{dropdown-prefix-cls} {
+    display: inline-block;
+    position: relative;
+
+    &-rel{
+        display: inline-block;
+    }
+
+    &-menu{
+        min-width: 100px;
+    }
+}
+
+.select-item(@dropdown-prefix-cls, @dropdown-item-prefix-cls);

src/styles/components/index.less

@@ -28,4 +28,5 @@
 @import "slider";
 @import "cascader";
 @import "transfer";
-@import "table";
+@import "table";
+@import "dropdown";

src/styles/mixins/input.less

@@ -27,7 +27,7 @@
 .input-small() {
     padding: @input-padding-vertical-small @input-padding-horizontal;
     height: @input-height-small;
-    border-radius: @border-radius-small;
+    border-radius: @btn-border-radius-small;
 }
 
 .input() {
@@ -38,7 +38,7 @@
     padding: @input-padding-vertical-base @input-padding-horizontal;
     font-size: @font-size-small;
     border: 1px solid @input-border-color;
-    border-radius: @border-radius-base;
+    border-radius: @btn-border-radius;
     color: @input-color;
     background-color: @input-bg;
     background-image: none;

src/styles/mixins/select.less

@@ -37,6 +37,18 @@
         &-selected&-focus {
             background: shade(@selected-color, 10%);
         }
+
+        &-divided{
+            margin-top: 5px;
+            border-top: 1px solid @border-color-split;
+            &:before{
+                content: '';
+                height: 5px;
+                display: block;
+                margin: -7px -16px 0;
+                background-color: #fff;
+            }
+        }
     }
 
     .@{size-class}-large .@{item-class} {