www.gusucode.com > 一个基于extjs的强大聊天插件源码程序 > 一个基于extjs的强大聊天插件/extjame/ext-jame/js/ext2/source/widgets/menu/Menu.js
/*
* Ext JS Library 2.0.2
* Copyright(c) 2006-2008, Ext JS, LLC.
* licensing@extjs.com
*
* http://extjs.com/license
*/
/**
* @class Ext.menu.Menu
* @extends Ext.util.Observable
* A menu object. This is the container to which you add all other menu items. Menu can also serve a as a base class
* when you want a specialzed menu based off of another component (like {@link Ext.menu.DateMenu} for example).
* @constructor
* Creates a new Menu
* @param {Object} config Configuration options
*/
Ext.menu.Menu = function(config){
if(Ext.isArray(config)){
config = {items:config};
}
Ext.apply(this, config);
this.id = this.id || Ext.id();
this.addEvents(
/**
* @event beforeshow
* Fires before this menu is displayed
* @param {Ext.menu.Menu} this
*/
'beforeshow',
/**
* @event beforehide
* Fires before this menu is hidden
* @param {Ext.menu.Menu} this
*/
'beforehide',
/**
* @event show
* Fires after this menu is displayed
* @param {Ext.menu.Menu} this
*/
'show',
/**
* @event hide
* Fires after this menu is hidden
* @param {Ext.menu.Menu} this
*/
'hide',
/**
* @event click
* Fires when this menu is clicked (or when the enter key is pressed while it is active)
* @param {Ext.menu.Menu} this
* @param {Ext.menu.Item} menuItem The menu item that was clicked
* @param {Ext.EventObject} e
*/
'click',
/**
* @event mouseover
* Fires when the mouse is hovering over this menu
* @param {Ext.menu.Menu} this
* @param {Ext.EventObject} e
* @param {Ext.menu.Item} menuItem The menu item that was clicked
*/
'mouseover',
/**
* @event mouseout
* Fires when the mouse exits this menu
* @param {Ext.menu.Menu} this
* @param {Ext.EventObject} e
* @param {Ext.menu.Item} menuItem The menu item that was clicked
*/
'mouseout',
/**
* @event itemclick
* Fires when a menu item contained in this menu is clicked
* @param {Ext.menu.BaseItem} baseItem The BaseItem that was clicked
* @param {Ext.EventObject} e
*/
'itemclick'
);
Ext.menu.MenuMgr.register(this);
Ext.menu.Menu.superclass.constructor.call(this);
var mis = this.items;
/**
* A MixedCollection of this Menu's items
* @property items
* @type Ext.util.MixedCollection
*/
this.items = new Ext.util.MixedCollection();
if(mis){
this.add.apply(this, mis);
}
};
Ext.extend(Ext.menu.Menu, Ext.util.Observable, {
/**
* @cfg {Object} defaults
* A config object that will be applied to all items added to this container either via the {@link #items}
* config or via the {@link #add} method. The defaults config can contain any number of
* name/value property pairs to be added to each item, and should be valid for the types of items
* being added to the menu.
*/
/**
* @cfg {Mixed} items
* An array of items to be added to this menu. See {@link #add} for a list of valid item types.
*/
/**
* @cfg {Number} minWidth The minimum width of the menu in pixels (defaults to 120)
*/
minWidth : 120,
/**
* @cfg {Boolean/String} shadow True or "sides" for the default effect, "frame" for 4-way shadow, and "drop"
* for bottom-right shadow (defaults to "sides")
*/
shadow : "sides",
/**
* @cfg {String} subMenuAlign The {@link Ext.Element#alignTo} anchor position value to use for submenus of
* this menu (defaults to "tl-tr?")
*/
subMenuAlign : "tl-tr?",
/**
* @cfg {String} defaultAlign The default {@link Ext.Element#alignTo) anchor position value for this menu
* relative to its element of origin (defaults to "tl-bl?")
*/
defaultAlign : "tl-bl?",
/**
* @cfg {Boolean} allowOtherMenus True to allow multiple menus to be displayed at the same time (defaults to false)
*/
allowOtherMenus : false,
hidden:true,
createEl : function(){
return new Ext.Layer({
cls: "x-menu",
shadow:this.shadow,
constrain: false,
parentEl: this.parentEl || document.body,
zindex:15000
});
},
// private
render : function(){
if(this.el){
return;
}
var el = this.el = this.createEl();
if(!this.keyNav){
this.keyNav = new Ext.menu.MenuNav(this);
}
if(this.plain){
el.addClass("x-menu-plain");
}
if(this.cls){
el.addClass(this.cls);
}
// generic focus element
this.focusEl = el.createChild({
tag: "a", cls: "x-menu-focus", href: "#", onclick: "return false;", tabIndex:"-1"
});
var ul = el.createChild({tag: "ul", cls: "x-menu-list"});
ul.on("click", this.onClick, this);
ul.on("mouseover", this.onMouseOver, this);
ul.on("mouseout", this.onMouseOut, this);
this.items.each(function(item){
var li = document.createElement("li");
li.className = "x-menu-list-item";
ul.dom.appendChild(li);
item.render(li, this);
}, this);
this.ul = ul;
this.autoWidth();
},
// private
autoWidth : function(){
var el = this.el, ul = this.ul;
if(!el){
return;
}
var w = this.width;
if(w){
el.setWidth(w);
}else if(Ext.isIE){
el.setWidth(this.minWidth);
var t = el.dom.offsetWidth; // force recalc
el.setWidth(ul.getWidth()+el.getFrameWidth("lr"));
}
},
// private
delayAutoWidth : function(){
if(this.el){
if(!this.awTask){
this.awTask = new Ext.util.DelayedTask(this.autoWidth, this);
}
this.awTask.delay(20);
}
},
// private
findTargetItem : function(e){
var t = e.getTarget(".x-menu-list-item", this.ul, true);
if(t && t.menuItemId){
return this.items.get(t.menuItemId);
}
},
// private
onClick : function(e){
var t;
if(t = this.findTargetItem(e)){
t.onClick(e);
this.fireEvent("click", this, t, e);
}
},
// private
setActiveItem : function(item, autoExpand){
if(item != this.activeItem){
if(this.activeItem){
this.activeItem.deactivate();
}
this.activeItem = item;
item.activate(autoExpand);
}else if(autoExpand){
item.expandMenu();
}
},
// private
tryActivate : function(start, step){
var items = this.items;
for(var i = start, len = items.length; i >= 0 && i < len; i+= step){
var item = items.get(i);
if(!item.disabled && item.canActivate){
this.setActiveItem(item, false);
return item;
}
}
return false;
},
// private
onMouseOver : function(e){
var t;
if(t = this.findTargetItem(e)){
if(t.canActivate && !t.disabled){
this.setActiveItem(t, true);
}
}
this.fireEvent("mouseover", this, e, t);
},
// private
onMouseOut : function(e){
var t;
if(t = this.findTargetItem(e)){
if(t == this.activeItem && t.shouldDeactivate(e)){
this.activeItem.deactivate();
delete this.activeItem;
}
}
this.fireEvent("mouseout", this, e, t);
},
/**
* Read-only. Returns true if the menu is currently displayed, else false.
* @type Boolean
*/
isVisible : function(){
return this.el && !this.hidden;
},
/**
* Displays this menu relative to another element
* @param {Mixed} element The element to align to
* @param {String} position (optional) The {@link Ext.Element#alignTo} anchor position to use in aligning to
* the element (defaults to this.defaultAlign)
* @param {Ext.menu.Menu} parentMenu (optional) This menu's parent menu, if applicable (defaults to undefined)
*/
show : function(el, pos, parentMenu){
this.parentMenu = parentMenu;
if(!this.el){
this.render();
}
this.fireEvent("beforeshow", this);
this.showAt(this.el.getAlignToXY(el, pos || this.defaultAlign), parentMenu, false);
},
/**
* Displays this menu at a specific xy position
* @param {Array} xyPosition Contains X & Y [x, y] values for the position at which to show the menu (coordinates are page-based)
* @param {Ext.menu.Menu} parentMenu (optional) This menu's parent menu, if applicable (defaults to undefined)
*/
showAt : function(xy, parentMenu, /* private: */_e){
this.parentMenu = parentMenu;
if(!this.el){
this.render();
}
if(_e !== false){
this.fireEvent("beforeshow", this);
xy = this.el.adjustForConstraints(xy);
}
this.el.setXY(xy);
this.el.show();
this.hidden = false;
this.focus();
this.fireEvent("show", this);
},
focus : function(){
if(!this.hidden){
this.doFocus.defer(50, this);
}
},
doFocus : function(){
if(!this.hidden){
this.focusEl.focus();
}
},
/**
* Hides this menu and optionally all parent menus
* @param {Boolean} deep (optional) True to hide all parent menus recursively, if any (defaults to false)
*/
hide : function(deep){
if(this.el && this.isVisible()){
this.fireEvent("beforehide", this);
if(this.activeItem){
this.activeItem.deactivate();
this.activeItem = null;
}
this.el.hide();
this.hidden = true;
this.fireEvent("hide", this);
}
if(deep === true && this.parentMenu){
this.parentMenu.hide(true);
}
},
/**
* Addds one or more items of any type supported by the Menu class, or that can be converted into menu items.
* Any of the following are valid:
* <ul>
* <li>Any menu item object based on {@link Ext.menu.Item}</li>
* <li>An HTMLElement object which will be converted to a menu item</li>
* <li>A menu item config object that will be created as a new menu item</li>
* <li>A string, which can either be '-' or 'separator' to add a menu separator, otherwise
* it will be converted into a {@link Ext.menu.TextItem} and added</li>
* </ul>
* Usage:
* <pre><code>
// Create the menu
var menu = new Ext.menu.Menu();
// Create a menu item to add by reference
var menuItem = new Ext.menu.Item({ text: 'New Item!' });
// Add a bunch of items at once using different methods.
// Only the last item added will be returned.
var item = menu.add(
menuItem, // add existing item by ref
'Dynamic Item', // new TextItem
'-', // new separator
{ text: 'Config Item' } // new item by config
);
</code></pre>
* @param {Mixed} args One or more menu items, menu item configs or other objects that can be converted to menu items
* @return {Ext.menu.Item} The menu item that was added, or the last one if multiple items were added
*/
add : function(){
var a = arguments, l = a.length, item;
for(var i = 0; i < l; i++){
var el = a[i];
if(el.render){ // some kind of Item
item = this.addItem(el);
}else if(typeof el == "string"){ // string
if(el == "separator" || el == "-"){
item = this.addSeparator();
}else{
item = this.addText(el);
}
}else if(el.tagName || el.el){ // element
item = this.addElement(el);
}else if(typeof el == "object"){ // must be menu item config?
Ext.applyIf(el, this.defaults);
item = this.addMenuItem(el);
}
}
return item;
},
/**
* Returns this menu's underlying {@link Ext.Element} object
* @return {Ext.Element} The element
*/
getEl : function(){
if(!this.el){
this.render();
}
return this.el;
},
/**
* Adds a separator bar to the menu
* @return {Ext.menu.Item} The menu item that was added
*/
addSeparator : function(){
return this.addItem(new Ext.menu.Separator());
},
/**
* Adds an {@link Ext.Element} object to the menu
* @param {Mixed} el The element or DOM node to add, or its id
* @return {Ext.menu.Item} The menu item that was added
*/
addElement : function(el){
return this.addItem(new Ext.menu.BaseItem(el));
},
/**
* Adds an existing object based on {@link Ext.menu.Item} to the menu
* @param {Ext.menu.Item} item The menu item to add
* @return {Ext.menu.Item} The menu item that was added
*/
addItem : function(item){
this.items.add(item);
if(this.ul){
var li = document.createElement("li");
li.className = "x-menu-list-item";
this.ul.dom.appendChild(li);
item.render(li, this);
this.delayAutoWidth();
}
return item;
},
/**
* Creates a new {@link Ext.menu.Item} based an the supplied config object and adds it to the menu
* @param {Object} config A MenuItem config object
* @return {Ext.menu.Item} The menu item that was added
*/
addMenuItem : function(config){
if(!(config instanceof Ext.menu.Item)){
if(typeof config.checked == "boolean"){ // must be check menu item config?
config = new Ext.menu.CheckItem(config);
}else{
config = new Ext.menu.Item(config);
}
}
return this.addItem(config);
},
/**
* Creates a new {@link Ext.menu.TextItem} with the supplied text and adds it to the menu
* @param {String} text The text to display in the menu item
* @return {Ext.menu.Item} The menu item that was added
*/
addText : function(text){
return this.addItem(new Ext.menu.TextItem(text));
},
/**
* Inserts an existing object based on {@link Ext.menu.Item} to the menu at a specified index
* @param {Number} index The index in the menu's list of current items where the new item should be inserted
* @param {Ext.menu.Item} item The menu item to add
* @return {Ext.menu.Item} The menu item that was added
*/
insert : function(index, item){
this.items.insert(index, item);
if(this.ul){
var li = document.createElement("li");
li.className = "x-menu-list-item";
this.ul.dom.insertBefore(li, this.ul.dom.childNodes[index]);
item.render(li, this);
this.delayAutoWidth();
}
return item;
},
/**
* Removes an {@link Ext.menu.Item} from the menu and destroys the object
* @param {Ext.menu.Item} item The menu item to remove
*/
remove : function(item){
this.items.removeKey(item.id);
item.destroy();
},
/**
* Removes and destroys all items in the menu
*/
removeAll : function(){
var f;
while(f = this.items.first()){
this.remove(f);
}
},
/**
* Destroys the menu by unregistering it from {@link Ext.menu.MenuMgr}, purging event listeners,
* removing all of the menus items, then destroying the underlying {@link Ext.Element}
*/
destroy : function(){
this.beforeDestroy();
Ext.menu.MenuMgr.unregister(this);
if (this.keyNav) {
this.keyNav.disable();
}
this.removeAll();
if (this.ul) {
this.ul.removeAllListeners();
}
if (this.el) {
this.el.destroy();
}
},
// private
beforeDestroy : Ext.emptyFn
});
// MenuNav is a private utility class used internally by the Menu
Ext.menu.MenuNav = function(menu){
Ext.menu.MenuNav.superclass.constructor.call(this, menu.el);
this.scope = this.menu = menu;
};
Ext.extend(Ext.menu.MenuNav, Ext.KeyNav, {
doRelay : function(e, h){
var k = e.getKey();
if(!this.menu.activeItem && e.isNavKeyPress() && k != e.SPACE && k != e.RETURN){
this.menu.tryActivate(0, 1);
return false;
}
return h.call(this.scope || this, e, this.menu);
},
up : function(e, m){
if(!m.tryActivate(m.items.indexOf(m.activeItem)-1, -1)){
m.tryActivate(m.items.length-1, -1);
}
},
down : function(e, m){
if(!m.tryActivate(m.items.indexOf(m.activeItem)+1, 1)){
m.tryActivate(0, 1);
}
},
right : function(e, m){
if(m.activeItem){
m.activeItem.expandMenu(true);
}
},
left : function(e, m){
m.hide();
if(m.parentMenu && m.parentMenu.activeItem){
m.parentMenu.activeItem.activate();
}
},
enter : function(e, m){
if(m.activeItem){
e.stopPropagation();
m.activeItem.onClick(e);
m.fireEvent("click", this, m.activeItem);
return true;
}
}
});