paper-input-search.html 15.6 KB
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444
<!--
@license
Copyright (c) 2015 The Polymer Project Authors. All rights reserved.
This code may only be used under the BSD style license found at http://polymer.github.io/LICENSE.txt
The complete set of authors may be found at http://polymer.github.io/AUTHORS.txt
The complete set of contributors may be found at http://polymer.github.io/CONTRIBUTORS.txt
Code distributed by Google as part of the polymer project is also
subject to an additional IP rights grant found at http://polymer.github.io/PATENTS.txt
-->

<link rel="import" href="../../bower_components/polymer/polymer.html">
<link rel="import" href="../../bower_components/paper-styles/default-theme.html">
<link rel="import" href="../../bower_components/paper-input/paper-input.html">
<link rel="import" href="../../bower_components/paper-menu-button/paper-menu-button.html">
<link rel="import" href="../../bower_components/paper-ripple/paper-ripple.html">
<link rel="import" href="../../bower_components/iron-a11y-keys-behavior/iron-a11y-keys-behavior.html">
<link rel="import" href="../../bower_components/iron-behaviors/iron-control-state.html">
<link rel="import" href="../../bower_components/iron-behaviors/iron-button-state.html">
<link rel="import" href="../../bower_components/iron-icons/iron-icons.html">
<link rel="import" href="../../bower_components/iron-icon/iron-icon.html">
<link rel="import" href="../../bower_components/iron-selector/iron-selectable.html">
<link rel="import" href="../../bower_components/iron-form-element-behavior/iron-form-element-behavior.html">
<link rel="import" href="../../bower_components/iron-validatable-behavior/iron-validatable-behavior.html">

<!--
Material design: [Dropdown menus](https://www.google.com/design/spec/components/buttons.html#buttons-dropdown-buttons)

`paper-dropdown-menu` is similar to a native browser select element.
`paper-dropdown-menu` works with selectable content. The currently selected
item is displayed in the control. If no item is selected, the `label` is
displayed instead.

The child element with the class `dropdown-content` will be used as the dropdown
menu. It could be a `paper-menu` or element that triggers `iron-select` when
selecting its children.

Example:

    <paper-dropdown-menu label="Your favourite pastry">
      <paper-menu class="dropdown-content">
        <paper-item>Croissant</paper-item>
        <paper-item>Donut</paper-item>
        <paper-item>Financier</paper-item>
        <paper-item>Madeleine</paper-item>
      </paper-menu>
    </paper-dropdown-menu>

This example renders a dropdown menu with 4 options.

Similarly to using `iron-select`, `iron-deselect` events will cause the
current selection of the `paper-dropdown-menu` to be cleared.

### Styling

The following custom properties and mixins are also available for styling:

Custom property | Description | Default
----------------|-------------|----------
`--paper-dropdown-menu` | A mixin that is applied to the element host | `{}`
`--paper-dropdown-menu-disabled` | A mixin that is applied to the element host when disabled | `{}`
`--paper-dropdown-menu-ripple` | A mixin that is applied to the internal ripple | `{}`
`--paper-dropdown-menu-button` | A mixin that is applied to the internal menu button | `{}`
`--paper-dropdown-menu-input` | A mixin that is applied to the internal paper input | `{}`
`--paper-dropdown-menu-icon` | A mixin that is applied to the internal icon | `{}`

You can also use any of the `paper-input-container` and `paper-menu-button`
style mixins and custom properties to style the internal input and menu button
respectively.

@group Paper Elements
@element paper-dropdown-menu
@hero hero.svg
@demo demo/index.html
-->

<dom-module id="paper-input-search">
    <style>
        :host {
            display: inline-block;
            position: relative;
            text-align: left;
            cursor: pointer;

            /* NOTE(cdata): Both values are needed, since some phones require the
             * value to be `transparent`.
             */
            -webkit-tap-highlight-color: rgba(0,0,0,0);
            -webkit-tap-highlight-color: transparent;

        --paper-input-container-input: {
             overflow: hidden;
             white-space: nowrap;
             text-overflow: ellipsis;
             max-width: 100%;
             box-sizing: border-box;
             /*cursor: pointer;*/
         };

        @apply(--paper-dropdown-menu);
        }

        :host([disabled]) {
        @apply(--paper-dropdown-menu-disabled);
        }

        :host([noink]) paper-ripple {
            display: none;
        }

        :host([no-label-float]) paper-ripple {
            top: 8px;
        }

        paper-ripple {
            top: 12px;
            left: 0px;
            bottom: 8px;
            right: 0px;

        @apply(--paper-dropdown-menu-ripple);
        }

        paper-menu-button {
            display: block;
            padding: 0;
        @apply(--paper-dropdown-menu-button);
        }

        paper-input {
        @apply(--paper-dropdown-menu-input);
        }

        iron-icon {
            /*color: var(--disabled-text-color);*/
            color: #2196F3;

        @apply(--paper-dropdown-menu-icon);
        }

    </style>
    <template>
        <paper-menu-button
                id="menuButton"
                vertical-align="top"
                horizontal-align="left"
                vertical-offset="[[_computeMenuVerticalOffset(noLabelFloat)]]"
                disabled="[[disabled]]"
                no-animations="[[noAnimations]]"
                on-iron-select="_onIronSelect"
                on-iron-deselect="_onIronDeselect"
                opened="{{opened}}">
            <div class="dropdown-trigger">
                <!--<paper-ripple></paper-ripple>-->
                <paper-input
                        id="inputField"
                        invalid="[[invalid]]"
                        value="{{inputValue}}"
                        placeholder="[[placeholder]]"
                        always-float-label="[[alwaysFloatLabel]]"
                        no-label-float="[[noLabelFloat]]"
                        label="[[label]]">
                    <iron-icon icon="search" prefix></iron-icon>
                    <iron-icon icon="arrow-drop-down" suffix></iron-icon>
                </paper-input>
            </div>
            <content id="content" select=".dropdown-content"></content>
        </paper-menu-button>
    </template>
</dom-module>
<script>
    (function() {
        'use strict';

        Polymer({
            is: 'paper-input-search',

            /**
             * Fired when the dropdown opens.
             *
             * @event paper-dropdown-open
             */

            /**
             * Fired when the dropdown closes.
             *
             * @event paper-dropdown-close
             */

            behaviors: [
                Polymer.IronControlState,
                Polymer.IronButtonState,
                Polymer.IronFormElementBehavior,
                Polymer.IronValidatableBehavior
            ],

            properties: {
                /**
                 * The derived "label" of the currently selected item. This value
                 * is the `label` property on the selected item if set, or else the
                 * trimmed text content of the selected item.
                 */
                selectedItemLabel: {
                    type: String,
                    notify: true,
                    readOnly: true
                },

                /**
                 * The last selected item. An item is selected if the dropdown menu has
                 * a child with class `dropdown-content`, and that child triggers an
                 * `iron-select` event with the selected `item` in the `detail`.
                 *
                 * @type {?Object}
                 */
                selectedItem: {
                    type: Object,
                    notify: true,
                    readOnly: true
                },

                /**
                 * The value for this element that will be used when submitting in
                 * a form. It is read only, and will always have the same value
                 * as `selectedItemLabel`.
                 */
                value: {
                    type: String,
                    notify: true,
                    readOnly: true
                },

                /**
                 * The label for the dropdown.
                 */
                label: {
                    type: String
                },

                /**
                 * The placeholder for the dropdown.
                 */
                placeholder: {
                    type: String
                },

                /**
                 * True if the dropdown is open. Otherwise, false.
                 */
                opened: {
                    type: Boolean,
                    notify: true,
                    value: false
                },

                /**
                 * Set to true to disable the floating label. Bind this to the
                 * `<paper-input-container>`'s `noLabelFloat` property.
                 */
                noLabelFloat: {
                    type: Boolean,
                    value: false,
                    reflectToAttribute: true
                },

                /**
                 * Set to true to always float the label. Bind this to the
                 * `<paper-input-container>`'s `alwaysFloatLabel` property.
                 */
                alwaysFloatLabel: {
                    type: Boolean,
                    value: false
                },

                /**
                 * Set to true to disable animations when opening and closing the
                 * dropdown.
                 */
                noAnimations: {
                    type: Boolean,
                    value: false
                },

                inputValue: {
                    type: String,
                    value: undefined,
                    observer: '_fireInputValue'
                },

                fireInputValue: {
                    type: Boolean,
                    value: true,
                }
            },

            listeners: {
                'tap': '_onTap'
            },

            keyBindings: {
                'up down': 'open',
                'esc': 'close'
            },

            hostAttributes: {
                role: 'group',
                'aria-haspopup': 'true'
            },

            observers: [
//                '_selectedItemChanged(selectedItem)'
            ],

            attached: function() {
                // NOTE(cdata): Due to timing, a preselected value in a `IronSelectable`
                // child will cause an `iron-select` event to fire while the element is
                // still in a `DocumentFragment`. This has the effect of causing
                // handlers not to fire. So, we double check this value on attached:
                var contentElement = this.contentElement;
                if (contentElement && contentElement.selectedItem) {
                    this._setSelectedItem(contentElement.selectedItem);
                }
            },

            _fireInputValue: function() {//console.log(this.inputValue);
                if(this.fireInputValue) {//change NO DDL
                    this.fire('paper-input-search_input-value', {inputValue: this.inputValue});
                    if(this.contentElement.selectedItem){
//                        this._setSelectedItem(null);
                        this.contentElement.select(-1);
//                        console.log("deselected");
                    }
                }

                this.fireInputValue = true;
            },

            /**
             * The content element that is contained by the dropdown menu, if any.
             */
            get contentElement() {
                return Polymer.dom(this.$.content).getDistributedNodes()[0];
            },

            /**
             * Show the dropdown content.
             */
            open: function() {
                this.$.menuButton.open();
            },

            /**
             * Hide the dropdown content.
             */
            close: function() {
                this.$.menuButton.close();
            },

            /**
             * A handler that is called when `iron-select` is fired.
             *
             * @param {CustomEvent} event An `iron-select` event.
             */
            _onIronSelect: function(event) {
//                console.log("select");
                this.fireInputValue = false;
                this._setSelectedItem(event.detail.item);
                this.inputValue = event.detail.item.label || event.detail.item.textContent.trim();
            },

            /**
             * A handler that is called when `iron-deselect` is fired.
             *
             * @param {CustomEvent} event An `iron-deselect` event.
             */
            _onIronDeselect: function(event) {
//                console.log("deselect");
                this.fireInputValue = false;
                this._setSelectedItem(null);
            },

            /**
             * A handler that is called when the dropdown is tapped.
             *
             * @param {CustomEvent} event A tap event.
             */
            _onTap: function(event) {
                if (Polymer.Gestures.findOriginalTarget(event) === this) {
                    this.open();
                }
                this.async(function(){this.$.inputField.$.input.focus();},200);//to improve
//                console.log(this.selectedItemLabel);
//                console.log(this.value);
//                console.log(this.$.inputField.value);
//                console.log(this.inputValue);
            },

            /**
             * Compute the label for the dropdown given a selected item.
             *
             * @param {Element} selectedItem A selected Element item, with an
             * optional `label` property.
             */
//            _selectedItemChanged: function(selectedItem) {
//                var value = '';
//                if (!selectedItem) {
//                    value = '';
//                } else {
//                    value = selectedItem.label || selectedItem.textContent.trim();
//                }
//
//                this._setValue(value);
//                this._setSelectedItemLabel(value);
//                this.inputValue = selectedItem.label || selectedItem.textContent.trim();
//            },

            /**
             * Compute the vertical offset of the menu based on the value of
             * `noLabelFloat`.
             *
             * @param {boolean} noLabelFloat True if the label should not float
             * above the input, otherwise false.
             */
            _computeMenuVerticalOffset: function(noLabelFloat) {
                // NOTE(cdata): These numbers are somewhat magical because they are
                // derived from the metrics of elements internal to `paper-input`'s
                // template. The metrics will change depending on whether or not the
                // input has a floating label.
//                return noLabelFloat ? -4 : 8;
                return noLabelFloat ? 46-4 : 46+8;
//                return 64;
            },

            /**
             * Returns false if the element is required and does not have a selection,
             * and true otherwise.
             * @return {Boolean} true if `required` is false, or if `required` is true
             * and the element has a valid selection.
             */
            _getValidity: function() {
                return this.disabled || !this.required || (this.required && this.value);
            }
        });
    })();
</script>