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7b9752c99d
Forward declares symbol. This is an indication to the compiler that the symbol may be used in the source yet is not required and may not be provided in compilation. The most common usage of forward declaration is code that takes a type as a function parameter but does not need to require it. By forward declaring instead of requiring, no hard dependency is made, and (if not required elsewhere) the namespace may never be required and thus, not be pulled into the JavaScript binary. If it is required elsewhere, it will be type checked as normal. ------------- Created by MOE: https://github.com/google/moe MOE_MIGRATED_REVID=127095620
137 lines
3.9 KiB
JavaScript
137 lines
3.9 KiB
JavaScript
// Copyright 2016 The Domain Registry Authors. All Rights Reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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goog.provide('registry.MenuButton');
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goog.require('goog.array');
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goog.require('goog.asserts');
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goog.require('goog.dom');
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goog.require('goog.dom.classlist');
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goog.require('goog.events');
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goog.require('goog.events.EventHandler');
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goog.require('goog.events.EventType');
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goog.forwardDeclare('goog.events.BrowserEvent');
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/**
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* Kennedy style menu button.
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* @param {!Element} button Menu button element.
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* @constructor
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* @extends {goog.events.EventHandler}
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* @final
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*/
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registry.MenuButton = function(button) {
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registry.MenuButton.base(this, 'constructor');
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/**
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* Outer menu button element.
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* @private {!Element}
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* @const
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*/
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this.button_ = button;
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this.listen(button, goog.events.EventType.CLICK, this.onButtonClick_);
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/**
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* Label that displays currently selected item.
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* @private {!Element}
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* @const
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*/
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this.label_ =
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goog.dom.getRequiredElementByClass(goog.getCssName('label'), button);
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/**
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* List of selectable items.
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* @private {!Element}
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* @const
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*/
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this.menu_ =
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goog.dom.getRequiredElementByClass(goog.getCssName('kd-menulist'),
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button);
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goog.array.forEach(
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goog.dom.getElementsByClass(goog.getCssName('kd-menulistitem'), button),
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function(item) {
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this.listen(item, goog.events.EventType.CLICK, this.onItemClick_);
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},
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this);
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};
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goog.inherits(registry.MenuButton, goog.events.EventHandler);
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/**
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* Returns selected value in menu.
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* @return {string}
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*/
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registry.MenuButton.prototype.getValue = function() {
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return goog.dom.getTextContent(
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goog.dom.getRequiredElementByClass(
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goog.getCssName('selected'),
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this.button_));
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};
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/**
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* Main menu button handler.
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* @param {!goog.events.BrowserEvent} e
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* @private
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*/
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registry.MenuButton.prototype.onButtonClick_ = function(e) {
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if (goog.dom.classlist.contains(this.button_, goog.getCssName('selected'))) {
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return;
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}
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e.stopPropagation();
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goog.dom.classlist.add(this.button_, goog.getCssName('selected'));
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goog.dom.classlist.add(this.menu_, goog.getCssName('shown'));
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this.listenOnce(goog.dom.getDocument().body, goog.events.EventType.CLICK,
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this.hideMenu_);
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};
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/**
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* Menu item selection handler.
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* @param {!goog.events.BrowserEvent} e
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* @private
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*/
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registry.MenuButton.prototype.onItemClick_ = function(e) {
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e.stopPropagation();
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if (goog.dom.classlist.contains(this.button_, goog.getCssName('disabled'))) {
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return;
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}
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goog.array.forEach(
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goog.dom.getElementsByClass(goog.getCssName('kd-menulistitem'),
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this.button_),
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function(item) {
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goog.dom.classlist.remove(item, goog.getCssName('selected'));
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},
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this);
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goog.asserts.assert(e.target instanceof Element);
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goog.dom.classlist.add(e.target, goog.getCssName('selected'));
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var text = goog.dom.getTextContent(e.target);
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goog.dom.setTextContent(this.label_, text);
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goog.events.fireListeners(this.button_, goog.events.EventType.CHANGE,
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false, {newValue: text});
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this.hideMenu_();
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};
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/**
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* Hide the menu.
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* @private
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*/
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registry.MenuButton.prototype.hideMenu_ = function() {
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goog.dom.classlist.remove(this.menu_, goog.getCssName('shown'));
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goog.dom.classlist.remove(this.button_, goog.getCssName('selected'));
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};
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