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/tree/TreeNode.js
/*
* Ext JS Library 2.0.2
* Copyright(c) 2006-2008, Ext JS, LLC.
* licensing@extjs.com
*
* http://extjs.com/license
*/
/**
* @class Ext.tree.TreeNode
* @extends Ext.data.Node
* @cfg {String} text The text for this node
* @cfg {Boolean} expanded true to start the node expanded
* @cfg {Boolean} allowDrag False to make this node undraggable if {@link #draggable} = true (defaults to true)
* @cfg {Boolean} allowDrop False if this node cannot have child nodes dropped on it (defaults to true)
* @cfg {Boolean} disabled true to start the node disabled
* @cfg {String} icon The path to an icon for the node. The preferred way to do this
* is to use the cls or iconCls attributes and add the icon via a CSS background image.
* @cfg {String} cls A css class to be added to the node
* @cfg {String} iconCls A css class to be added to the nodes icon element for applying css background images
* @cfg {String} href URL of the link used for the node (defaults to #)
* @cfg {String} hrefTarget target frame for the link
* @cfg {String} qtip An Ext QuickTip for the node
* @cfg {Boolean} expandable If set to true, the node will always show a plus/minus icon, even when empty
* @cfg {String} qtipCfg An Ext QuickTip config for the node (used instead of qtip)
* @cfg {Boolean} singleClickExpand True for single click expand on this node
* @cfg {Function} uiProvider A UI <b>class</b> to use for this node (defaults to Ext.tree.TreeNodeUI)
* @cfg {Boolean} checked True to render a checked checkbox for this node, false to render an unchecked checkbox
* (defaults to undefined with no checkbox rendered)
* @cfg {Boolean} draggable True to make this node draggable (defaults to false)
* @cfg {Boolean} isTarget False to not allow this node to act as a drop target (defaults to true)
* @cfg {Boolean} allowChildren False to not allow this node to have child nodes (defaults to true)
* @constructor
* @param {Object/String} attributes The attributes/config for the node or just a string with the text for the node
*/
Ext.tree.TreeNode = function(attributes){
attributes = attributes || {};
if(typeof attributes == "string"){
attributes = {text: attributes};
}
this.childrenRendered = false;
this.rendered = false;
Ext.tree.TreeNode.superclass.constructor.call(this, attributes);
this.expanded = attributes.expanded === true;
this.isTarget = attributes.isTarget !== false;
this.draggable = attributes.draggable !== false && attributes.allowDrag !== false;
this.allowChildren = attributes.allowChildren !== false && attributes.allowDrop !== false;
/**
* Read-only. The text for this node. To change it use setText().
* @type String
*/
this.text = attributes.text;
/**
* True if this node is disabled.
* @type Boolean
*/
this.disabled = attributes.disabled === true;
this.addEvents(
/**
* @event textchange
* Fires when the text for this node is changed
* @param {Node} this This node
* @param {String} text The new text
* @param {String} oldText The old text
*/
"textchange",
/**
* @event beforeexpand
* Fires before this node is expanded, return false to cancel.
* @param {Node} this This node
* @param {Boolean} deep
* @param {Boolean} anim
*/
"beforeexpand",
/**
* @event beforecollapse
* Fires before this node is collapsed, return false to cancel.
* @param {Node} this This node
* @param {Boolean} deep
* @param {Boolean} anim
*/
"beforecollapse",
/**
* @event expand
* Fires when this node is expanded
* @param {Node} this This node
*/
"expand",
/**
* @event disabledchange
* Fires when the disabled status of this node changes
* @param {Node} this This node
* @param {Boolean} disabled
*/
"disabledchange",
/**
* @event collapse
* Fires when this node is collapsed
* @param {Node} this This node
*/
"collapse",
/**
* @event beforeclick
* Fires before click processing. Return false to cancel the default action.
* @param {Node} this This node
* @param {Ext.EventObject} e The event object
*/
"beforeclick",
/**
* @event click
* Fires when this node is clicked
* @param {Node} this This node
* @param {Ext.EventObject} e The event object
*/
"click",
/**
* @event checkchange
* Fires when a node with a checkbox's checked property changes
* @param {Node} this This node
* @param {Boolean} checked
*/
"checkchange",
/**
* @event dblclick
* Fires when this node is double clicked
* @param {Node} this This node
* @param {Ext.EventObject} e The event object
*/
"dblclick",
/**
* @event contextmenu
* Fires when this node is right clicked
* @param {Node} this This node
* @param {Ext.EventObject} e The event object
*/
"contextmenu",
/**
* @event beforechildrenrendered
* Fires right before the child nodes for this node are rendered
* @param {Node} this This node
*/
"beforechildrenrendered"
);
var uiClass = this.attributes.uiProvider || this.defaultUI || Ext.tree.TreeNodeUI;
/**
* Read-only. The UI for this node
* @type TreeNodeUI
*/
this.ui = new uiClass(this);
};
Ext.extend(Ext.tree.TreeNode, Ext.data.Node, {
preventHScroll: true,
/**
* Returns true if this node is expanded
* @return {Boolean}
*/
isExpanded : function(){
return this.expanded;
},
/**
* Returns the UI object for this node.
* @return {TreeNodeUI} The object which is providing the user interface for this tree
* node. Unless otherwise specified in the {@link #uiProvider}, this will be an instance
* of {@link Ext.tree.TreeNodeUI}
*/
getUI : function(){
return this.ui;
},
// private override
setFirstChild : function(node){
var of = this.firstChild;
Ext.tree.TreeNode.superclass.setFirstChild.call(this, node);
if(this.childrenRendered && of && node != of){
of.renderIndent(true, true);
}
if(this.rendered){
this.renderIndent(true, true);
}
},
// private override
setLastChild : function(node){
var ol = this.lastChild;
Ext.tree.TreeNode.superclass.setLastChild.call(this, node);
if(this.childrenRendered && ol && node != ol){
ol.renderIndent(true, true);
}
if(this.rendered){
this.renderIndent(true, true);
}
},
// these methods are overridden to provide lazy rendering support
// private override
appendChild : function(){
var node = Ext.tree.TreeNode.superclass.appendChild.apply(this, arguments);
if(node && this.childrenRendered){
node.render();
}
this.ui.updateExpandIcon();
return node;
},
// private override
removeChild : function(node){
this.ownerTree.getSelectionModel().unselect(node);
Ext.tree.TreeNode.superclass.removeChild.apply(this, arguments);
// if it's been rendered remove dom node
if(this.childrenRendered){
node.ui.remove();
}
if(this.childNodes.length < 1){
this.collapse(false, false);
}else{
this.ui.updateExpandIcon();
}
if(!this.firstChild && !this.isHiddenRoot()) {
this.childrenRendered = false;
}
return node;
},
// private override
insertBefore : function(node, refNode){
var newNode = Ext.tree.TreeNode.superclass.insertBefore.apply(this, arguments);
if(newNode && refNode && this.childrenRendered){
node.render();
}
this.ui.updateExpandIcon();
return newNode;
},
/**
* Sets the text for this node
* @param {String} text
*/
setText : function(text){
var oldText = this.text;
this.text = text;
this.attributes.text = text;
if(this.rendered){ // event without subscribing
this.ui.onTextChange(this, text, oldText);
}
this.fireEvent("textchange", this, text, oldText);
},
/**
* Triggers selection of this node
*/
select : function(){
this.getOwnerTree().getSelectionModel().select(this);
},
/**
* Triggers deselection of this node
*/
unselect : function(){
this.getOwnerTree().getSelectionModel().unselect(this);
},
/**
* Returns true if this node is selected
* @return {Boolean}
*/
isSelected : function(){
return this.getOwnerTree().getSelectionModel().isSelected(this);
},
/**
* Expand this node.
* @param {Boolean} deep (optional) True to expand all children as well
* @param {Boolean} anim (optional) false to cancel the default animation
* @param {Function} callback (optional) A callback to be called when
* expanding this node completes (does not wait for deep expand to complete).
* Called with 1 parameter, this node.
*/
expand : function(deep, anim, callback){
if(!this.expanded){
if(this.fireEvent("beforeexpand", this, deep, anim) === false){
return;
}
if(!this.childrenRendered){
this.renderChildren();
}
this.expanded = true;
if(!this.isHiddenRoot() && (this.getOwnerTree().animate && anim !== false) || anim){
this.ui.animExpand(function(){
this.fireEvent("expand", this);
if(typeof callback == "function"){
callback(this);
}
if(deep === true){
this.expandChildNodes(true);
}
}.createDelegate(this));
return;
}else{
this.ui.expand();
this.fireEvent("expand", this);
if(typeof callback == "function"){
callback(this);
}
}
}else{
if(typeof callback == "function"){
callback(this);
}
}
if(deep === true){
this.expandChildNodes(true);
}
},
isHiddenRoot : function(){
return this.isRoot && !this.getOwnerTree().rootVisible;
},
/**
* Collapse this node.
* @param {Boolean} deep (optional) True to collapse all children as well
* @param {Boolean} anim (optional) false to cancel the default animation
*/
collapse : function(deep, anim){
if(this.expanded && !this.isHiddenRoot()){
if(this.fireEvent("beforecollapse", this, deep, anim) === false){
return;
}
this.expanded = false;
if((this.getOwnerTree().animate && anim !== false) || anim){
this.ui.animCollapse(function(){
this.fireEvent("collapse", this);
if(deep === true){
this.collapseChildNodes(true);
}
}.createDelegate(this));
return;
}else{
this.ui.collapse();
this.fireEvent("collapse", this);
}
}
if(deep === true){
var cs = this.childNodes;
for(var i = 0, len = cs.length; i < len; i++) {
cs[i].collapse(true, false);
}
}
},
// private
delayedExpand : function(delay){
if(!this.expandProcId){
this.expandProcId = this.expand.defer(delay, this);
}
},
// private
cancelExpand : function(){
if(this.expandProcId){
clearTimeout(this.expandProcId);
}
this.expandProcId = false;
},
/**
* Toggles expanded/collapsed state of the node
*/
toggle : function(){
if(this.expanded){
this.collapse();
}else{
this.expand();
}
},
/**
* Ensures all parent nodes are expanded, and if necessary, scrolls
* the node into view.
*/
ensureVisible : function(callback){
var tree = this.getOwnerTree();
tree.expandPath(this.parentNode.getPath(), false, function(){
var node = tree.getNodeById(this.id); // Somehow if we don't do this, we lose changes that happened to node in the meantime
tree.getTreeEl().scrollChildIntoView(node.ui.anchor);
Ext.callback(callback);
}.createDelegate(this));
},
/**
* Expand all child nodes
* @param {Boolean} deep (optional) true if the child nodes should also expand their child nodes
*/
expandChildNodes : function(deep){
var cs = this.childNodes;
for(var i = 0, len = cs.length; i < len; i++) {
cs[i].expand(deep);
}
},
/**
* Collapse all child nodes
* @param {Boolean} deep (optional) true if the child nodes should also collapse their child nodes
*/
collapseChildNodes : function(deep){
var cs = this.childNodes;
for(var i = 0, len = cs.length; i < len; i++) {
cs[i].collapse(deep);
}
},
/**
* Disables this node
*/
disable : function(){
this.disabled = true;
this.unselect();
if(this.rendered && this.ui.onDisableChange){ // event without subscribing
this.ui.onDisableChange(this, true);
}
this.fireEvent("disabledchange", this, true);
},
/**
* Enables this node
*/
enable : function(){
this.disabled = false;
if(this.rendered && this.ui.onDisableChange){ // event without subscribing
this.ui.onDisableChange(this, false);
}
this.fireEvent("disabledchange", this, false);
},
// private
renderChildren : function(suppressEvent){
if(suppressEvent !== false){
this.fireEvent("beforechildrenrendered", this);
}
var cs = this.childNodes;
for(var i = 0, len = cs.length; i < len; i++){
cs[i].render(true);
}
this.childrenRendered = true;
},
// private
sort : function(fn, scope){
Ext.tree.TreeNode.superclass.sort.apply(this, arguments);
if(this.childrenRendered){
var cs = this.childNodes;
for(var i = 0, len = cs.length; i < len; i++){
cs[i].render(true);
}
}
},
// private
render : function(bulkRender){
this.ui.render(bulkRender);
if(!this.rendered){
// make sure it is registered
this.getOwnerTree().registerNode(this);
this.rendered = true;
if(this.expanded){
this.expanded = false;
this.expand(false, false);
}
}
},
// private
renderIndent : function(deep, refresh){
if(refresh){
this.ui.childIndent = null;
}
this.ui.renderIndent();
if(deep === true && this.childrenRendered){
var cs = this.childNodes;
for(var i = 0, len = cs.length; i < len; i++){
cs[i].renderIndent(true, refresh);
}
}
},
beginUpdate : function(){
this.childrenRendered = false;
},
endUpdate : function(){
if(this.expanded){
this.renderChildren();
}
},
destroy : function(){
for(var i = 0,l = this.childNodes.length; i < l; i++){
this.childNodes[i].destroy();
}
this.childNodes = null;
if(this.ui.destroy){
this.ui.destroy();
}
}
});