treenodeui.js

一个struts和extjs得源码

/*
 * Ext JS Library 2.2.1
 * Copyright(c) 2006-2009, Ext JS, LLC.
 * [e-mail]
 * 
 * http://extjs.com/license
 */

/**
 * @class Ext.tree.TreeNodeUI
 * This class provides the default UI implementation for Ext TreeNodes.
 * The TreeNode UI implementation is separate from the
 * tree implementation, and allows customizing of the appearance of
 * tree nodes.<br>
 * <p>
 * If you are customizing the Tree's user interface, you
 * may need to extend this class, but you should never need to instantiate this class.<br>
 * <p>
 * This class provides access to the user interface components of an Ext TreeNode, through
 * {@link Ext.tree.TreeNode#getUI}
 */
Ext.tree.TreeNodeUI = function(node){
    this.node = node;
    this.rendered = false;
    this.animating = false;
    this.wasLeaf = true;
    this.ecc = 'x-tree-ec-icon x-tree-elbow';
    this.emptyIcon = Ext.BLANK_IMAGE_URL;
};

Ext.tree.TreeNodeUI.prototype = {
    // private
    removeChild : function(node){
        if(this.rendered){
            this.ctNode.removeChild(node.ui.getEl());
        } 
    },

    // private
    beforeLoad : function(){
         this.addClass("x-tree-node-loading");
    },

    // private
    afterLoad : function(){
         this.removeClass("x-tree-node-loading");
    },

    // private
    onTextChange : function(node, text, oldText){
        if(this.rendered){
            this.textNode.innerHTML = text;
        }
    },

    // private
    onDisableChange : function(node, state){
        this.disabled = state;
		if (this.checkbox) {
			this.checkbox.disabled = state;
		}        
        if(state){
            this.addClass("x-tree-node-disabled");
        }else{
            this.removeClass("x-tree-node-disabled");
        } 
    },

    // private
    onSelectedChange : function(state){
        if(state){
            this.focus();
            this.addClass("x-tree-selected");
        }else{
            //this.blur();
            this.removeClass("x-tree-selected");
        }
    },

    // private
    onMove : function(tree, node, oldParent, newParent, index, refNode){
        this.childIndent = null;
        if(this.rendered){
            var targetNode = newParent.ui.getContainer();
            if(!targetNode){//target not rendered
                this.holder = document.createElement("div");
                this.holder.appendChild(this.wrap);
                return;
            }
            var insertBefore = refNode ? refNode.ui.getEl() : null;
            if(insertBefore){
                targetNode.insertBefore(this.wrap, insertBefore);
            }else{
                targetNode.appendChild(this.wrap);
            }
            this.node.renderIndent(true);
        }
    },

/**
 * Adds one or more CSS classes to the node's UI element.
 * Duplicate classes are automatically filtered out.
 * @param {String/Array} className The CSS class to add, or an array of classes
 */
    addClass : function(cls){
        if(this.elNode){
            Ext.fly(this.elNode).addClass(cls);
        }
    },

/**
 * Removes one or more CSS classes from the node's UI element.
 * @param {String/Array} className The CSS class to remove, or an array of classes
 */
    removeClass : function(cls){
        if(this.elNode){
            Ext.fly(this.elNode).removeClass(cls);  
        }
    },

    // private
    remove : function(){
        if(this.rendered){
            this.holder = document.createElement("div");
            this.holder.appendChild(this.wrap);
        }  
    },

    // private
    fireEvent : function(){
        return this.node.fireEvent.apply(this.node, arguments);  
    },

    // private
    initEvents : function(){
        this.node.on("move", this.onMove, this);

        if(this.node.disabled){
            this.addClass("x-tree-node-disabled");
			if (this.checkbox) {
				this.checkbox.disabled = true;
			}            
        }
        if(this.node.hidden){
            this.hide();
        }
        var ot = this.node.getOwnerTree();
        var dd = ot.enableDD || ot.enableDrag || ot.enableDrop;
        if(dd && (!this.node.isRoot || ot.rootVisible)){
            Ext.dd.Registry.register(this.elNode, {
                node: this.node,
                handles: this.getDDHandles(),
                isHandle: false
            });
        }
    },

    // private
    getDDHandles : function(){
        return [this.iconNode, this.textNode, this.elNode];
    },

/**
 * Hides this node.
 */
    hide : function(){
        this.node.hidden = true;
        if(this.wrap){
            this.wrap.style.display = "none";
        }
    },

/**
 * Shows this node.
 */
    show : function(){
        this.node.hidden = false;
        if(this.wrap){
            this.wrap.style.display = "";
        } 
    },

    // private
    onContextMenu : function(e){
        if (this.node.hasListener("contextmenu") || this.node.getOwnerTree().hasListener("contextmenu")) {
            e.preventDefault();
            this.focus();
            this.fireEvent("contextmenu", this.node, e);
        }
    },

    // private
    onClick : function(e){
        if(this.dropping){
            e.stopEvent();
            return;
        }
        if(this.fireEvent("beforeclick", this.node, e) !== false){
            var a = e.getTarget('a');
            if(!this.disabled && this.node.attributes.href && a){
                this.fireEvent("click", this.node, e);
                return;
            }else if(a && e.ctrlKey){
                e.stopEvent();
            }
            e.preventDefault();
            if(this.disabled){
                return;
            }

            if(this.node.attributes.singleClickExpand && !this.animating && this.node.isExpandable()){
                this.node.toggle();
            }

            this.fireEvent("click", this.node, e);
        }else{
            e.stopEvent();
        }
    },

    // private
    onDblClick : function(e){
        e.preventDefault();
        if(this.disabled){
            return;
        }
        if(this.checkbox){
            this.toggleCheck();
        }
        if(!this.animating && this.node.isExpandable()){
            this.node.toggle();
        }
        this.fireEvent("dblclick", this.node, e);
    },

    onOver : function(e){
        this.addClass('x-tree-node-over');
    },

    onOut : function(e){
        this.removeClass('x-tree-node-over');
    },

    // private
    onCheckChange : function(){
        var checked = this.checkbox.checked;
		// fix for IE6
		this.checkbox.defaultChecked = checked;
        this.node.attributes.checked = checked;
        this.fireEvent('checkchange', this.node, checked);
    },

    // private
    ecClick : function(e){
        if(!this.animating && this.node.isExpandable()){
            this.node.toggle();
        }
    },

    // private
    startDrop : function(){
        this.dropping = true;
    },
    
    // delayed drop so the click event doesn't get fired on a drop
    endDrop : function(){ 
       setTimeout(function(){
           this.dropping = false;
       }.createDelegate(this), 50); 
    },

    // private
    expand : function(){
        this.updateExpandIcon();
        this.ctNode.style.display = "";
    },

    // private
    focus : function(){
        if(!this.node.preventHScroll){
            try{this.anchor.focus();
            }catch(e){}
        }else{
            try{
                var noscroll = this.node.getOwnerTree().getTreeEl().dom;
                var l = noscroll.scrollLeft;
                this.anchor.focus();
                noscroll.scrollLeft = l;
            }catch(e){}
        }
    },

/**
 * Sets the checked status of the tree node to the passed value, or, if no value was passed,
 * toggles the checked status. If the node was rendered with no checkbox, this has no effect.
 * @param {Boolean} (optional) The new checked status.
 */
    toggleCheck : function(value){
        var cb = this.checkbox;
        if(cb){
            cb.checked = (value === undefined ? !cb.checked : value);
            this.onCheckChange();
        }
    },

    // private
    blur : function(){
        try{
            this.anchor.blur();
        }catch(e){} 
    },

    // private
    animExpand : function(callback){