From d26fb8196be56e60e51fde53feb6f74e166c0fbf Mon Sep 17 00:00:00 2001
From: cagataycivici <cagatay.civici@gmail.com>
Date: Sun, 30 Dec 2018 13:36:20 +0300
Subject: [PATCH] Initiated MultiSelect

---
 src/AppMenu.vue                            |   1 +
 src/assets/styles/primevue.css             |   1 +
 src/components/multiselect/MultiSelect.css | 149 ++++++++++++++++
 src/components/multiselect/MultiSelect.vue | 188 +++++++++++++++++++++
 src/main.js                                |   2 +
 src/router.js                              |   5 +
 src/views/multiselect/MultiSelectDemo.vue  |  55 ++++++
 7 files changed, 401 insertions(+)
 create mode 100644 src/components/multiselect/MultiSelect.css
 create mode 100644 src/components/multiselect/MultiSelect.vue
 create mode 100644 src/views/multiselect/MultiSelectDemo.vue

diff --git a/src/AppMenu.vue b/src/AppMenu.vue
index 6ffdd7f39..e2a9beb60 100644
--- a/src/AppMenu.vue
+++ b/src/AppMenu.vue
@@ -15,6 +15,7 @@
                     <router-link to="/inputswitch">&#9679; InputSwitch</router-link>
                     <router-link to="/inputtext">&#9679; InputText</router-link>
                     <router-link to="/listbox">&#9679; Listbox</router-link>
+                    <router-link to="/multiselect">&#9679; MultiSelect</router-link>
                     <router-link to="/password">&#9679; Password</router-link>
                     <router-link to="/radiobutton">&#9679; RadioButton</router-link>
                     <router-link to="/rating">&#9679; Rating</router-link>
diff --git a/src/assets/styles/primevue.css b/src/assets/styles/primevue.css
index 4fb9e0efd..24096d753 100644
--- a/src/assets/styles/primevue.css
+++ b/src/assets/styles/primevue.css
@@ -9,6 +9,7 @@
 @import '../../components/inputtext/InputText.css';
 @import '../../components/inputswitch/InputSwitch.css';
 @import '../../components/listbox/Listbox.css';
+@import '../../components/multiselect/MultiSelect.css';
 @import '../../components/panel/Panel.css';
 @import '../../components/password/Password.css';
 @import '../../components/progressbar/ProgressBar.css';
diff --git a/src/components/multiselect/MultiSelect.css b/src/components/multiselect/MultiSelect.css
new file mode 100644
index 000000000..c6627b06f
--- /dev/null
+++ b/src/components/multiselect/MultiSelect.css
@@ -0,0 +1,149 @@
+/** MultiSelect **/
+.p-multiselect {
+    display: inline-block;
+    position: relative;
+    width: auto;
+    cursor: pointer;
+}
+
+.p-multiselect .p-multiselect-trigger {
+    border-right: none;
+    border-top: none;
+    border-bottom: none;
+    cursor: pointer;
+    width: 1.5em;
+    height: 100%;
+    position: absolute;
+    right: 0;
+    top: 0;
+    padding: 0 .25em;
+}
+
+.p-multiselect .p-multiselect-trigger .p-multiselect-trigger-icon {
+    top: 50%;
+    left: 50%;
+    margin-top: -.5em;
+    margin-left: -.5em;
+    position: absolute;
+}
+
+.p-multiselect .p-multiselect-label-container  {
+    overflow: hidden;
+}
+
+.p-multiselect .p-multiselect-label  {
+    display: block;
+    padding: .25em 2em .25em .25em;
+    width: auto;
+    border: none;
+    cursor: pointer;
+    text-overflow: ellipsis;
+    overflow: hidden;
+}
+
+.p-multiselect-label-empty {
+    overflow: hidden;
+    visibility: hidden;
+}
+
+.p-multiselect.p-disabled .p-multiselect-trigger,
+.p-multiselect.p-disabled .p-multiselect-label {
+    cursor: auto
+}
+
+.p-multiselect-panel {
+    padding: 0.2em;
+    position: absolute;
+    min-width: 10em;
+}
+
+.p-multiselect .p-multiselect-panel {
+    min-width: 100%;
+}
+
+.p-multiselect-panel .p-multiselect-items-wrapper {
+    overflow: auto;
+    position: relative;
+    padding: 0.2em 0;
+}
+
+.p-multiselect-panel .p-multiselect-list {
+    border: 0 none;
+}
+
+.p-multiselect-panel .p-multiselect-item {
+    border: 0 none;
+    cursor: pointer;
+    font-weight: normal;
+    margin: 1px 0;
+    padding: .125em .25em;
+    text-align: left;
+    white-space: nowrap;
+    display: block;
+    position: relative;
+}
+
+.p-multiselect-panel .p-multiselect-item .p-checkbox {
+    display: inline-block;
+    vertical-align: middle;
+}
+
+.p-multiselect-panel .p-multiselect-item label {
+    display: inline-block;
+    vertical-align: middle;
+}
+
+.p-multiselect-header {
+    margin-bottom: 0.3em;
+    padding: .25em;
+    position: relative;
+    text-align: left;
+}
+
+.p-multiselect-header .p-checkbox {
+    display: inline-block;
+    vertical-align: middle;
+    cursor:pointer;
+}
+
+.p-multiselect-header .p-multiselect-filter-container {
+    position: relative;
+    display: inline-block;
+    vertical-align: middle;
+    width: 65%;
+}
+
+.p-multiselect-header .p-multiselect-filter-container .p-multiselect-filter-icon {
+    position: absolute;
+    top: .25em;
+    left: .125em;
+}
+            
+.p-multiselect-header .p-inputtext {
+    padding: .125em .125em .125em 1.25em;
+    width: 100%;
+}
+
+.p-multiselect-header .p-multiselect-close {
+    position: absolute;
+    right: .375em;
+    top: .375em;
+    display: block;
+    border: 0 none;
+}
+
+.p-multiselect-header a.p-multiselect-all,
+.p-multiselect-header a.p-multiselect-none {
+    float:left;
+    margin-right: 10px;
+    display: block;
+}
+
+.p-multiselect-header .p-multiselect-close.p-state-hover {
+    padding:0px;
+}
+
+.p-fluid .p-multiselect {
+    width: 100%;
+    box-sizing: border-box;
+}
diff --git a/src/components/multiselect/MultiSelect.vue b/src/components/multiselect/MultiSelect.vue
new file mode 100644
index 000000000..3e53aef94
--- /dev/null
+++ b/src/components/multiselect/MultiSelect.vue
@@ -0,0 +1,188 @@
+<template>
+    <div :class="containerClass" @click="onClick">
+        <div class="p-hidden-accessible">
+            <input ref="focusInput" type="text" role="listbox" readonly :disabled="disabled" @focus="onFocus" @blur="onBlur" @keydown="onKeyDown" :tabindex="tabindex"/>
+        </div>
+        <div class="p-multiselect-label-container">
+            <label :class="labelClass">{{label}}</label>
+        </div>
+        <div class="p-multiselect-trigger">
+            <span class="p-multiselect-trigger-icon pi pi-chevron-down p-c"></span>
+        </div>
+    </div>
+</template>
+
+<script>
+export default {
+    props: {
+        value: null,
+        options: Array,
+        dataKey: null,
+        filter: Boolean,
+        optionLabel: null,
+        optionValue: null,
+        optionDisabled: null,
+        disabled: Boolean,
+        tabindex: String,
+        editable: Boolean,
+        placeholder: String,
+        scrollHeight: {
+            type: String,
+            default: '200px'
+        },
+        filterPlaceholder: String
+    },
+    data() {
+        return {
+            focused: false,
+            filterValue: null,
+            overlayVisible: false
+        };
+    },
+    outsideClickListener: null,
+    beforeDestroy() {
+        this.unbindOutsideClickListener();
+    },
+    updated() {
+        if (this.overlayVisible && this.filterValue) {
+            this.alignOverlay();
+        }
+    },
+    methods: {
+        getOptionLabel(option) {
+            return ObjectUtils.resolveFieldData(option, this.optionLabel);
+        },
+        getOptionValue(option) {
+            return this.optionValue ? ObjectUtils.resolveFieldData(option, this.optionValue) : option;
+        },
+        isOptionDisabled(option) {
+            return this.optionDisabled ? ObjectUtils.resolveFieldData(option, this.optionDisabled) : false;
+        },
+        onFocus() {
+            this.focused = true;
+        },
+        onBlur() {
+            this.focused = false;
+        },
+        onClick() {
+
+        },
+        onKeyDown(event) {
+            switch(event.which) {
+                //down
+                case 40:
+                    if (this.visibleOptions && this.overlayVisible && event.altKey) {
+                        this.overlayVisible = true;
+                    } 
+                break;
+
+                //space
+                case 32:
+                    if (!this.overlayVisible) {
+                        this.overlayVisible = true;
+                        event.preventDefault();
+                    }
+                break;
+
+                //enter and escape
+                case 13:
+                case 27:
+                    if (this.overlayVisible) {
+                        this.hideOverlay();
+                        event.preventDefault();
+                    }
+                break;
+
+                //tab
+                case 9:
+                    this.hideOverlay();
+                break;
+
+                default:
+                break;
+            }
+        },
+        bindOutsideClickListener() {
+            if (!this.outsideClickListener) {
+                this.outsideClickListener = (event) => {
+                    if (this.$refs.overlay && !this.$refs.overlay.contains(event.target)) {
+                        this.hideOverlay();
+                    }
+                };
+                document.addEventListener('click', this.outsideClickListener);
+            }
+        },
+        unbindOutsideClickListener() {
+            if (this.outsideClickListener) {
+                document.removeEventListener('click', this.outsideClickListener);
+                this.outsideClickListener = null;
+            }
+        },
+        hideOverlay() {
+            this.overlayVisible = false;
+            this.unbindOutsideClickListener();
+        },
+        getLabelByValue(val) {
+            let label = null;
+
+            if (this.options) {
+                for (let option of this.options) {
+                    let optionValue = this.getOptionValue(option);
+
+                    if(ObjectUtils.equals(optionValue, val, this.dataKey)) {
+                        label = this.getOptionLabel(option);
+                        break;
+                    }
+                }
+            }
+
+            return label;
+        }
+    },
+    computed: {
+        visibleOptions() {
+            if (this.filterValue)
+                return this.options.filter(option => this.getOptionLabel(option).toLowerCase().indexOf(this.filterValue.toLowerCase()) > -1);
+            else
+                return this.options;
+        },
+        containerClass() {
+            return [
+                'p-multiselect p-component p-unselectable-text',
+                {
+                    'p-disabled': this.disabled,
+                    'p-focus': this.focused
+                }
+            ];
+        },
+        labelClass() {
+            return [
+                'p-multiselect-label', 
+                {
+                    'p-placeholder': this.label == null && this.placeholder, 
+                    'p-multiselect-label-empty': !this.placeholder
+                }
+            ];
+        },
+        label() {
+            let label;
+
+            if (this.value && this.value.length) {
+                label = '';
+                for(let i = 0; i < this.value.length; i++) {
+                    if(i !== 0) {
+                        label += ',';
+                    }
+
+                    label += this.findLabelByValue(this.value[i]);
+                }
+            }
+            else {
+                label = this.placeholder || 'p-multiselect';
+            }
+
+            return label;
+        }
+    }
+}
+</script>
\ No newline at end of file
diff --git a/src/main.js b/src/main.js
index 6c5fdd64d..ae8921aa6 100644
--- a/src/main.js
+++ b/src/main.js
@@ -12,6 +12,7 @@ import Editor from './components/editor/Editor';
 import InputSwitch from './components/inputswitch/InputSwitch';
 import InputText from './components/inputtext/InputText';
 import Fieldset from './components/fieldset/Fieldset';
+import MultiSelect from './components/multiselect/MultiSelect';
 import Listbox from './components/listbox/Listbox';
 import Panel from './components/panel/Panel';
 import Password from './components/password/Password';
@@ -46,6 +47,7 @@ Vue.component('p-inputSwitch', InputSwitch);
 Vue.component('p-inputtext', InputText);
 Vue.component('p-listbox', Listbox);
 Vue.component('p-fieldset', Fieldset);
+Vue.component('p-multiSelect', MultiSelect);
 Vue.component('p-panel', Panel);
 Vue.component('p-password', Password);
 Vue.component('p-progressBar', ProgressBar);
diff --git a/src/router.js b/src/router.js
index 3e6ef2cf5..ac8cace79 100644
--- a/src/router.js
+++ b/src/router.js
@@ -71,6 +71,11 @@ export default new Router({
         name: 'listbox',
         component: () => import('./views/listbox/ListboxDemo.vue')
     },
+    {
+        path: '/multiselect',
+        name: 'multiselect',
+        component: () => import('./views/multiselect/MultiSelectDemo.vue')
+    },
     {
         path: '/panel',
         name: 'panel',
diff --git a/src/views/multiselect/MultiSelectDemo.vue b/src/views/multiselect/MultiSelectDemo.vue
new file mode 100644
index 000000000..6e7e19cd2
--- /dev/null
+++ b/src/views/multiselect/MultiSelectDemo.vue
@@ -0,0 +1,55 @@
+<template>
+    <div>
+        <div class="content-section introduction">
+            <div class="feature-intro">
+                <h1>MultiSelect</h1>
+                <p>MultiSelect is used to multiple values from a list of options.</p>
+            </div>
+        </div>
+
+        <div class="content-section implementation">
+            <h3 class="first">Basic</h3>
+            <p-multiSelect v-model="selectedCars1" :options="cars" optionLabel="brand" placeholder="Select Brands" />
+        </div>
+    </div>
+</template>
+
+<script>
+export default {
+    data() {
+        return {
+            selectedCars1: null,
+            selectedCars2: null,
+            cars: [
+                {brand: 'Audi', value: 'Audi'},
+                {brand: 'Bmw', value: 'Bmw'},
+                {brand: 'Fiat', value: 'Fiat'},
+                {brand: 'Honda', value: 'Honda'},
+                {brand: 'Jaguar', value: 'Jaguar'},
+                {brand: 'Mercedes', value: 'Mercedes'},
+                {brand: 'Renault', value: 'Renault'},
+                {brand: 'Volkswagen', value: 'Volkswagen'},
+                {brand: 'Volvo', value: 'Volvo'}
+            ]
+        }
+    }
+}
+</script>
+
+<style lang="scss">
+.p-multiselect {
+    min-width: 12em;
+}
+
+.p-multiselect-car-option {
+    img {
+        vertical-align: middle;
+        margin-right: .5em;
+        width: 24px;
+    }
+
+    span {
+        margin-top: .125em;
+    }
+}
+</style>