/**
* Tree widget
* @namespace tree
* @class Tree
*/
ludo.tree.Tree = new Class({
Extends:ludo.CollectionView,
type:'tree.Tree',
nodeCache:{},
renderedRecords: {},
/**
String template for nodes in the tree
@config {String|Object}
@example
tpl : '{title}
or as an object:
@example
tpl:{
tplKey : 'type',
city : 'City : {city}',
country : 'Country : {country}
}
When using an object, "tplKey" is a reference to a common property of all objects, example "type". When type
for a node is "city", it will use the city : 'City : {city}' tpl. When it's "country", it will use the "country" tpl.
@example
[
{ id:1, "country":"Japan", "type":"country", "capital":"Tokyo", "population":"13,185,502",
children:[
{ id:11, city:'Kobe', "type":"city" },
{ id:12, city:'Kyoto', "type":"city" },
{ id:13, city:'Sapporo', "type":"city"},
{ id:14, city:'Sendai', "type":"city"},
{ id:15, city:'Kawasaki', "type":"city"}
]},
{id:2, "country":"South Korea", "capital":"Seoul", "population":"10,464,051", "type":"country",
children:[
{ id:21, city:'Seoul', "type":"city" }
]},
{id:3, "country":"Russia", "capital":"Moscow", "population":"10,126,424", "type":"country"},
]
is an example of a data structure for this tpl.
*/
tpl : '<span class="ludo-tree-node-spacer"></span> {title}',
tplKey:undefined,
dataSource:{
},
defaultDS: 'dataSource.TreeCollection',
/**
Default values when not present in node.
@config {Object} defaults
@default undefined
@example
defaults:{
"database" : {
"icon" : "image.gif"
}
}
where "database" refers to the record attribute with name defined in categoryKey property of tree(default "type" ).
*/
defaults:undefined,
/**
* Key used to defined nodes inside categories. This key is used for default values and node config
* @config {String} categoryKey
* @default "type"
*/
categoryKey : 'type',
/**
Config of tree node categories
@config {Object} categoryConfig
@example
categoryConfig:{
"database":{
"selectable" : false
}
}
*/
categoryConfig:undefined,
ludoConfig:function(config){
this.parent(config);
this.setConfigParams(config, ['defaults','categoryConfig','categoryKey']);
},
ludoEvents:function () {
this.parent();
if (this.dataSource) {
this.getDataSource().addEvents({
'select' : this.selectRecord.bind(this),
'deselect' : this.deSelectRecord.bind(this),
'add' : this.addRecord.bind(this),
'addChild' : this.addChild.bind(this),
'dispose' : this.removeChild.bind(this),
'removeChild' : this.removeChild.bind(this),
'show' : this.showRecord.bind(this),
'hide' : this.hideRecord.bind(this)
});
}
},
ludoDOM:function () {
this.parent();
this.getBody().style.overflowY = 'auto';
this.getBody().addEvents({
'click' : this.onClick.bind(this),
'dblclick' : this.onDblClick.bind(this)
});
},
onClick:function (e) {
var record = this.getRecordByDOM(e.target);
if (record) {
if(e.target.tagName.toLowerCase() === 'span' && this.isSelectable(record)) {
this.getDataSource().selectRecord(record);
}
if(ludo.dom.hasClass(e.target, 'ludo-tree-node-expand')){
this.expandOrCollapse(record, e.target);
}else{
this.expand(record, e.target);
}
}
},
onDblClick:function(e){
var record = this.getRecordByDOM(e.target);
if(record){
this.fireEvent('dblClick', record);
}
},
selectRecord:function (record) {
if(!record.getPlainRecord)record = this.getDataSource().getRecord(record);
if(!record)return;
if(!this.isRecordRendered(record))this.showRecord(record);
var el = this.getDomElement(record, '.ludo-tree-node-plain');
if (el)ludo.dom.addClass(el, 'ludo-tree-selected-node');
},
deSelectRecord:function (record) {
var el = this.getDomElement(record, '.ludo-tree-node-plain');
if (el)ludo.dom.removeClass(el, 'ludo-tree-selected-node');
},
getDomElement:function (record, cls) {
var el = this.getDomByRecord(record);
if (el)return document.id(el).getFirst(cls);
return undefined;
},
expandOrCollapse:function (record, el) {
el = this.getExpandEl(record);
var method = ludo.dom.hasClass(el, 'ludo-tree-node-collapse') ? 'collapse' : 'expand';
this[method](record,el);
},
expand:function (record, el) {
el = this.getExpandEl(record);
if(!this.areChildrenRendered(record)){
this.renderChildrenOf(record);
}
ludo.dom.addClass(el, 'ludo-tree-node-collapse');
this.getCachedNode(record, 'children', 'child-container-').style.display = '';
},
collapse:function (record, el) {
el = this.getExpandEl(record);
ludo.dom.removeClass(el, 'ludo-tree-node-collapse');
this.getCachedNode(record, 'children', 'child-container-').style.display = 'none';
},
getExpandEl:function (record) {
return this.getCachedNode(record, 'expand', 'expand-');
},
getChildContainer:function (record) {
return this.getCachedNode(record, 'children', 'child-container-');
},
hideRecord:function (record) {
if(this.isRecordRendered(record)){
this.getCachedNode(record, 'node', '').style.display = 'none';
}
},
showRecord:function (record) {
if(!this.isRecordRendered(record)){
this.showRecord(record.getParent());
this.expand(record.getParent());
this.showRecord(record.getParent());
}
this.getCachedNode(record, 'node', '').style.display = '';
},
getDomByRecord:function (record) {
return record ? this.getCachedNode(record, 'node', '') : undefined;
},
isRecordRendered:function(record){
return this.renderedRecords[record.getUID ? record.getUID() : record.uid] ? true : false;
},
areChildrenRendered:function(record){
record = record.getUID ? record.record : record;
return record.children && record.children.length ? this.isRecordRendered(record.children[0]) : false;
},
getCachedNode:function (record, cacheKey, idPrefix) {
if (this.nodeCache[cacheKey] === undefined)this.nodeCache[cacheKey] = {};
var uid = record.getUID ? record.getUID() : record.uid;
if (!this.nodeCache[cacheKey][uid]) {
this.nodeCache[cacheKey][uid] = this.getBody().getElementById(idPrefix + uid)
}
return this.nodeCache[cacheKey][uid];
},
getRecordByDOM:function (el) {
var b = this.getBody();
while (el !== b && (!el.className || el.className.indexOf('ludo-tree-a-node') === -1)) {
el = el.parentNode;
}
if (el)return this.getDataSource().getRecord(el.id);
return undefined;
},
insertJSON:function () {
this.nodeCache = {};
this.renderedRecords = {};
this.nodeContainer().innerHTML = '';
this.render();
},
render:function () {
this.parent();
var data = this.getDataSource().getData();
this.nodeContainer().innerHTML = this.getHtmlForBranch(data);
},
getHtmlForBranch:function (branch) {
var html = [];
for (var i = 0; i < branch.length; i++) {
html.push(this.getHtmlFor(branch[i], (i === branch.length - 1), true));
}
return html.join('');
},
renderChildrenOf:function(record){
var p = this.getChildContainer(record);
if(p){
var c = record.getChildren();
if(c)p.innerHTML = this.getHtmlForBranch(c);
}
},
getHtmlFor:function (record, isLast, includeContainer) {
var ret = [];
this.renderedRecords[record.uid] = true;
if (includeContainer) {
ret.push('<div class="ludo-tree-a-node ludo-tree-node');
if (isLast)ret.push(' ludo-tree-node-last-sibling');
ret.push('" id="' + record.uid + '">');
}
ret.push('<div class="ludo-tree-node-plain">');
ret.push(this.isSelectable(record) ? '<span class="ludo-tree-node-selectable">' : '<span>');
ret.push(this.getNodeTextFor(record));
ret.push('</span>');
ret.push('<div class="ludo-tree-node-expand" id="expand-' + record.uid + '" style="position:absolute;display:' + (record.children && record.children.length ? '' : 'none') + '"></div>');
ret.push('</div>');
ret.push('<div class="ludo-tree-node-container" style="display:none" id="child-container-');
ret.push(record.uid);
ret.push('">');
ret.push('</div>');
if (includeContainer)ret.push('</div>');
/**
* Event fired when a node is created
* @event createNode
* @param {String} id of DOM node
* @param {Object} record
* @param {tree.Tree} tree
*/
this.fireEvent('createNode', [record.uid, record, this]);
return ret.join('');
},
isSelectable:function (record) {
if(this.categoryConfig){
record = record.getUID ? record.getData() : record;
var config = this.categoryConfig[record[this.categoryKey]];
return config && config.selectable !== undefined ? config.selectable : true
}
return true;
},
getNodeTextFor:function (record) {
var tplFields = this.getTplFields(record);
var ret = this.getTpl(record);
for (var i = 0, count = tplFields.length; i < count; i++) {
var field = tplFields[i];
ret = ret.replace('{' + field + '}', record[field] ? record[field] : this.getDefaultValue(record, field));
}
ret = '<span class="ludo-tree-node-spacer"></span>' + ret;
return ret;
},
getDefaultValue:function(record, field){
if(this.defaults){
var key = this.categoryKey;
return record[key] && this.defaults && this.defaults[record[key]] ? this.defaults[record[key]][field] : '';
}
return "";
},
tpls:undefined,
getTpl:function(record){
return this.tpl['tplKey'] ? this.tpl[record[this.tplKey]] : this.tpl;
},
getTplFields:function (record) {
if (!this.tplFields) {
if(ludo.util.isString(this.tpl)){
this.tplFields = this.getTplMatches(this.tpl);
}else{
this.tplFields = {};
var tpl = Object.clone(this.tpl);
this.tplKey = tpl.tplKey;
for(var key in tpl){
if(tpl.hasOwnProperty(key)){
if(key != 'tplKey')this.tplFields[key] = this.getTplMatches(tpl[key]);
}
}
}
}
return this.tplKey ? this.tplFields[record[this.tplKey]] : this.tplFields;
},
getTplMatches:function(tpl){
var matches = tpl.match(/{([^}]+)}/g);
for (var i = 0; i < matches.length; i++) {
matches[i] = matches[i].replace(/[{}]/g, '');
}
return matches;
},
addRecord:function(record){
this.addChild(record);
},
addChild:function (record, parentRecord) {
var childContainer = parentRecord ? this.getChildContainer(parentRecord) : this.getBody();
if (childContainer) {
var node = this.getDomByRecord(record) || this.getNewNodeFor(record);
childContainer.appendChild(node);
this.cssBranch(parentRecord ? parentRecord.children : this.getDataSource().data);
if(parentRecord)this.getExpandEl(parentRecord).style.display='';
}
},
getNewNodeFor:function (record) {
record = record.getUID ? record.record : record;
if (!record.uid)this.getDataSource().indexRecord(record);
return ludo.dom.create({
cls : 'ludo-tree-a-node ludo-tree-node',
html : this.getHtmlFor(record, false, false),
id : record.uid
});
},
cssBranch:function (nodes) {
var count = nodes.length;
for (var i = Math.max(0,count-2); i < count; i++) {
var node = this.getDomByRecord(nodes[i]);
if (node) {
if (i < count - 1) {
ludo.dom.removeClass(node, 'ludo-tree-node-last-sibling');
} else {
ludo.dom.addClass(node, 'ludo-tree-node-last-sibling');
}
}
}
},
removeChild:function(record){
var el = this.getDomByRecord(record);
if(el){
el.parentNode.removeChild(el);
delete this.renderedRecords[this.getUID(record)];
if(record.parentUid){
var p = this.dataSource.findRecord(record.parentUid);
if(p)this.cssBranch(p.children);
}
}
},
getUID:function(record){
return record.getUID ? record.getUID() : record.uid;
}
});
