115 lines
3.3 KiB
JavaScript
115 lines
3.3 KiB
JavaScript
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//>>built
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define("dojox/grid/LazyTreeGridStoreModel", [
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"dojo/_base/declare",
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"dojo/_base/array",
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"dojo/_base/lang",
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"dijit/tree/ForestStoreModel"], function(declare, array, lang, ForestStoreModel){
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return declare("dojox.grid.LazyTreeGridStoreModel", ForestStoreModel, {
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// There are different approaches to get children for client-side
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// DataStore (e.g. dojo.data.ItemFileReadStore) or server-side DataStore
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// (e.g. dojox.data.QueryReadStore), so we need to be sure what kind of
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// DataStore is being used
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serverStore: false, // server side store
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constructor: function(/* Object */ args){
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this.serverStore = !!args.serverStore;
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},
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mayHaveChildren: function(/*dojo.data.Item*/ item){
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var children = null;
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return array.some(this.childrenAttrs, function(attr){
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children = this.store.getValue(item, attr);
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if(lang.isString(children)){
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return parseInt(children, 10) > 0 || children.toLowerCase() === "true" ? true : false;
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}else if(typeof children == "number"){
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return children > 0;
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}else if(typeof children == "boolean"){
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return children;
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}else if(this.store.isItem(children)){
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children = this.store.getValues(item, attr);
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return lang.isArray(children) ? children.length > 0 : false;
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}else{
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return false;
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}
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}, this);
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},
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getChildren: function(/*dojo.data.Item*/parentItem, /*function(items, size)*/onComplete, /*function*/ onError, /*object*/queryObj){
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if(queryObj){
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var start = queryObj.start || 0,
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count = queryObj.count,
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parentId = queryObj.parentId,
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sort = queryObj.sort;
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if(parentItem === this.root){
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this.root.size = 0;
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this.store.fetch({
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start: start,
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count: count,
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sort: sort,
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query: this.query,
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onBegin: lang.hitch(this, function(size){
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this.root.size = size;
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}),
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onComplete: lang.hitch(this, function(items){
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onComplete(items, queryObj, this.root.size);
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}),
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onError: onError
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});
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}else{
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var store = this.store;
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if(!store.isItemLoaded(parentItem)){
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var getChildren = lang.hitch(this, arguments.callee);
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store.loadItem({
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item: parentItem,
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onItem: function(parentItem){
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getChildren(parentItem, onComplete, onError, queryObj);
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},
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onError: onError
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});
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return;
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}
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if(this.serverStore && !this._isChildrenLoaded(parentItem)){
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this.childrenSize = 0;
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this.store.fetch({
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start: start,
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count: count,
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sort: sort,
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query: lang.mixin({parentId: parentId}, this.query || {}),
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onBegin: lang.hitch(this, function(size){
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this.childrenSize = size;
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}),
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onComplete: lang.hitch(this, function(items){
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onComplete(items, queryObj, this.childrenSize);
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}),
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onError: onError
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});
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}else{
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this.inherited(arguments);
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}
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}
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}else{
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this.inherited(arguments);
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}
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},
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_isChildrenLoaded: function(parentItem){
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// summary:
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// Check if all children of the given item have been loaded
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var children = null;
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return array.every(this.childrenAttrs, function(attr){
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children = this.store.getValues(parentItem, attr);
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return array.every(children, function(c){
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return this.store.isItemLoaded(c);
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}, this);
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}, this);
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},
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//overwritten
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onNewItem: function(item, parentInfo){ },
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onDeleteItem: function(item){ }
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});
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});
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