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// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
/**
* @fileoverview This implements a combobutton control.
*/
cr.define('cr.ui', function() {
/**
* Creates a new combobutton element.
* @param {Object=} opt_propertyBag Optional properties.
* @constructor
* @extends {HTMLUListElement}
*/
var ComboButton = cr.ui.define(cr.ui.MenuButton);
ComboButton.prototype = {
__proto__: cr.ui.MenuButton.prototype,
defaultItem_: null,
/**
* Truncates drop-down list.
*/
clear: function() {
this.menu.clear();
this.multiple = false;
},
addDropDownItem: function(item) {
this.multiple = true;
this.menu.addMenuItem(item).data = item;
},
/**
* Default item to fire on combobox click
*/
get defaultItem() {
return this.defaultItem_;
},
set defaultItem(defaultItem) {
this.defaultItem_ = defaultItem;
if (defaultItem.label) {
this.labelNode_.textContent = defaultItem.label;
} else {
this.labelNode_.textContent = '';
}
if (defaultItem.iconUrl) {
this.iconNode_.src = defaultItem.iconUrl;
} else {
this.iconNode_.src = '';
}
},
/**
* Initializes the element.
*/
decorate: function() {
cr.ui.MenuButton.prototype.decorate.call(this);
this.classList.add('combobutton');
this.iconNode_ = this.ownerDocument.createElement('img');
this.appendChild(this.iconNode_);
this.labelNode_ = this.ownerDocument.createElement('span');
this.appendChild(this.labelNode_);
var triggerIcon = this.ownerDocument.createElement('span');
triggerIcon.className = 'disclosureindicator';
this.trigger_ = this.ownerDocument.createElement('div');
this.trigger_.appendChild(triggerIcon);
this.appendChild(this.trigger_);
this.addEventListener('click', this.handleButtonClick_.bind(this));
this.trigger_.addEventListener('click',
this.handleTriggerClicked_.bind(this));
this.menu.addEventListener('activate',
this.handleMenuActivate_.bind(this));
// Remove mousedown event listener created by MenuButton::decorate,
// and move it down to trigger_.
this.removeEventListener('mousedown', this);
this.trigger_.addEventListener('mousedown', this);
},
/**
* Handles the keydown event for the menu button.
*/
handleKeyDown: function(e) {
switch (e.keyIdentifier) {
case 'Down':
case 'Up':
if (!this.isMenuShown())
this.showMenu();
e.preventDefault();
break;
case 'Esc':
case 'U+001B': // Maybe this is remote desktop playing a prank?
this.hideMenu();
break;
}
},
handleTriggerClicked_: function(event) {
event.stopPropagation();
},
handleMenuActivate_: function(event) {
this.dispatchSelectEvent(event.target.data);
},
handleButtonClick_: function() {
this.dispatchSelectEvent(this.defaultItem_);
},
dispatchSelectEvent: function(item) {
var selectEvent = new Event('select');
selectEvent.item = item;
this.dispatchEvent(selectEvent);
}
};
cr.defineProperty(ComboButton, 'disabled', cr.PropertyKind.BOOL_ATTR);
cr.defineProperty(ComboButton, 'multiple', cr.PropertyKind.BOOL_ATTR);
return {
ComboButton: ComboButton
};
});
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