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<!--
@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;
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cursor: pointer;
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/* 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 {
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/*color: var(--disabled-text-color);*/
color: #2196F3;
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@apply(--paper-dropdown-menu-icon);
}
</style>
<template>
<paper-menu-button
id="menuButton"
vertical-align="top"
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horizontal-align="left"
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vertical-offset="[[_computeMenuVerticalOffset(noLabelFloat)]]"
disabled="[[disabled]]"
no-animations="[[noAnimations]]"
on-iron-select="_onIronSelect"
on-iron-deselect="_onIronDeselect"
opened="{{opened}}">
<div class="dropdown-trigger">
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<!--<paper-ripple></paper-ripple>-->
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<paper-input
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id="inputField"
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invalid="[[invalid]]"
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value="{{inputValue}}"
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placeholder="[[placeholder]]"
always-float-label="[[alwaysFloatLabel]]"
no-label-float="[[noLabelFloat]]"
label="[[label]]">
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<iron-icon icon="search" prefix></iron-icon>
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<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,
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readOnly: true
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},
/**
* 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
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},
inputValue: {
type: String,
value: undefined,
observer: '_fireInputValue'
},
fireInputValue: {
type: Boolean,
value: true,
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}
},
listeners: {
'tap': '_onTap'
},
keyBindings: {
'up down': 'open',
'esc': 'close'
},
hostAttributes: {
role: 'group',
'aria-haspopup': 'true'
},
observers: [
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// '_selectedItemChanged(selectedItem)'
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],
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);
}
},
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_fireInputValue: function() {//console.log(this.inputValue);
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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);
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// console.log("deselected");
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}
}
this.fireInputValue = true;
},
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/**
* 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.$.menuButton.close();
},
/**
* A handler that is called when `iron-select` is fired.
*
* @param {CustomEvent} event An `iron-select` event.
*/
_onIronSelect: function(event) {
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// console.log("select");
this.fireInputValue = false;
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this._setSelectedItem(event.detail.item);
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this.inputValue = event.detail.item.label || event.detail.item.textContent.trim();
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},
/**
* A handler that is called when `iron-deselect` is fired.
*
* @param {CustomEvent} event An `iron-deselect` event.
*/
_onIronDeselect: function(event) {
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// console.log("deselect");
this.fireInputValue = false;
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this._setSelectedItem(null);
},
/**
* A handler that is called when the dropdown is tapped.
*
* @param {CustomEvent} event A tap event.
*/
_onTap: function(event) {
if (Polymer.Gestures.findOriginalTarget(event) === this) {
this.open();
}
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this.async(function(){this.$.inputField.$.input.focus();},200);//to improve
// console.log(this.selectedItemLabel);
// console.log(this.value);
// console.log(this.$.inputField.value);
// console.log(this.inputValue);
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},
/**
* Compute the label for the dropdown given a selected item.
*
* @param {Element} selectedItem A selected Element item, with an
* optional `label` property.
*/
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// _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();
// },
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/**
* 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;
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return noLabelFloat ? 46-4 : 46+8;
// return 64;
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},
/**
* 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);
}
});
})();
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</script>
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