Note:YAHOO.ext.View = function(container, tpl, dataModel, config){
this.el = getEl(container, true);
this.nodes = this.el.dom.childNodes;
if(typeof tpl == 'string'){
tpl = new YAHOO.ext.Template(tpl);
}
tpl.compile();
this.tpl = tpl;
this.setDataModel(dataModel);
var CE = YAHOO.util.CustomEvent;
this.events = {
'click' : new CE('click'),
'dblclick' : new CE('dblclick'),
'contextmenu' : new CE('contextmenu'),
'selectionchange' : new CE('selectionchange')
};
this.el.mon("click", this.onClick, this, true);
this.el.mon("dblclick", this.onDblClick, this, true);
this.el.mon("contextmenu", this.onContextMenu, this, true);
this.el.swallowEvent("selectstart", true);
this.selectedClass = 'ydataview-selected';
this.selections = [];
this.lastSelection = null;
this.jsonRoot = null;
YAHOO.ext.util.Config.apply(this, config);
if(this.renderUpdates || this.jsonRoot){
var um = this.el.getUpdateManager();
um.setRenderer(this);
}
};
YAHOO.extendX(YAHOO.ext.View, YAHOO.ext.util.Observable, {
getEl : function(){
return this.el;
},
render : function(el, response){
this.clearSelections();
this.el.update('');
var o;
try{
o = YAHOO.ext.util.JSON.decode(response.responseText);
if(this.jsonRoot){
o = eval('o.' + this.jsonRoot);
}
}catch(e){}
if(o && o.length){
this.html = [];
for(var i = 0, len = o.length; i < len; i++) {
this.renderEach(o[i]);
}
this.el.update(this.html.join(''));
this.html = null;
this.nodes = this.el.dom.childNodes;
this.updateIndexes(0);
}
},
refresh : function(){
this.clearSelections();
this.el.update('');
this.html = [];
this.dataModel.each(this.renderEach, this);
this.el.update(this.html.join(''));
this.html = null;
this.nodes = this.el.dom.childNodes;
this.updateIndexes(0);
},
prepareData : function(data, index){
return data;
},
renderEach : function(data){
this.html[this.html.length] = this.tpl.applyTemplate(this.prepareData(data));
},
refreshNode : function(index){
this.refreshNodes(index, index);
},
refreshNodes : function(dm, startIndex, endIndex){
this.clearSelections();
var dm = this.dataModel;
var ns = this.nodes;
for(var i = startIndex; i <= endIndex; i++){
var d = this.prepareData(dm.getRow(i), i);
if(i < ns.length-1){
var old = ns[i];
this.tpl.insertBefore(old, d);
this.el.dom.removeChild(old);
}else{
this.tpl.append(this.el.dom, d);
}
}
this.updateIndexes(startIndex, endIndex);
},
deleteNodes : function(dm, startIndex, endIndex){
this.clearSelections();
if(startIndex == 0 && endIndex >= this.nodes.length-1){
this.el.update('');
}else{
var el = this.el.dom;
for(var i = startIndex; i <= endIndex; i++){
el.removeChild(this.nodes[startIndex]);
}
this.updateIndexes(startIndex);
}
},
insertNodes : function(dm, startIndex, endIndex){
if(this.nodes.length == 0){
this.refresh();
}else{
this.clearSelections();
var t = this.tpl;
var before = this.nodes[startIndex];
var dm = this.dataModel;
if(before){
for(var i = startIndex; i <= endIndex; i++){
t.insertBefore(before, this.prepareData(dm.getRow(i), i));
}
}else{
var el = this.el.dom;
for(var i = startIndex; i <= endIndex; i++){
t.append(el, this.prepareData(dm.getRow(i), i));
}
}
this.updateIndexes(startIndex);
}
},
updateIndexes : function(dm, startIndex, endIndex){
var ns = this.nodes;
startIndex = startIndex || 0;
endIndex = endIndex || ns.length-1;
for(var i = startIndex; i <= endIndex; i++){
ns[i].nodeIndex = i;
}
},
setDataModel : function(dm){
this.unplugDataModel(this.dataModel);
this.dataModel = dm;
dm.on('cellupdated', this.refreshNode, this, true);
dm.on('datachanged', this.refresh, this, true);
dm.on('rowsdeleted', this.deleteNodes, this, true);
dm.on('rowsinserted', this.insertNodes, this, true);
dm.on('rowsupdated', this.refreshNodes, this, true);
dm.on('rowssorted', this.refresh, this, true);
this.refresh();
},
unplugDataModel : function(dm){
if(!dm) return;
dm.removeListener('cellupdated', this.refreshNode, this);
dm.removeListener('datachanged', this.refresh, this);
dm.removeListener('rowsdeleted', this.deleteNodes, this);
dm.removeListener('rowsinserted', this.insertNodes, this);
dm.removeListener('rowsupdated', this.refreshNodes, this);
dm.removeListener('rowssorted', this.refresh, this);
this.dataModel = null;
},
findItemFromChild : function(node){
var el = this.el.dom;
if(!node || node.parentNode == el){
return node;
}
var p = node.parentNode;
while(p && p != el){
if(p.parentNode == el){
return p;
}
p = p.parentNode;
}
return null;
},
onClick : function(e){
var item = this.findItemFromChild(e.getTarget());
if(item){
var index = this.indexOf(item);
this.onItemClick(item, index, e);
this.fireEvent('click', this, index, item, e);
}else{
this.clearSelections();
}
},
onContextMenu : function(e){
var item = this.findItemFromChild(e.getTarget());
if(item){
this.fireEvent('contextmenu', this, this.indexOf(item), item, e);
}
},
onDblClick : function(e){
var item = this.findItemFromChild(e.getTarget());
if(item){
this.fireEvent('dblclick', this, this.indexOf(item), item, e);
}
},
onItemClick : function(item, index, e){
if(this.multiSelect || this.singleSelect){
if(this.multiSelect && e.shiftKey && this.lastSelection){
this.select(this.getNodes(this.indexOf(this.lastSelection), index), false);
}else{
this.select(item, this.multiSelect && e.ctrlKey);
this.lastSelection = item;
}
}
},
getSelectionCount : function(){
return this.selections.length;
},
getSelectedNodes : function(){
return this.selections;
},
getSelectedIndexes : function(){
var indexes = [];
for(var i = 0, len = this.selections.length; i < len; i++) {
indexes.push(this.selections[i].nodeIndex);
}
return indexes;
},
clearSelections : function(suppressEvent){
if(this.multiSelect || this.singleSelect){
YAHOO.util.Dom.removeClass(this.selections, this.selectedClass);
this.selections = [];
if(!suppressEvent){
this.fireEvent('selectionchange', this, this.selections);
}
}
},
select : function(nodeInfo, keepExisting, suppressEvent){
if(!keepExisting){
this.clearSelections(true);
}
if(nodeInfo instanceof Array){
for(var i = 0, len = nodeInfo.length; i < len; i++) {
this.select(nodeInfo[i], true, true);
}
}else{
var node = this.getNode(nodeInfo);
if(node){
YAHOO.util.Dom.addClass(node, this.selectedClass);
this.selections.push(node);
}
}
if(!suppressEvent){
this.fireEvent('selectionchange', this, this.selections);
}
},
getNode : function(nodeInfo){
if(typeof nodeInfo == 'object'){
return nodeInfo;
}else if(typeof nodeInfo == 'string'){
return document.getElementById(nodeInfo);
}else if(typeof nodeInfo == 'number'){
return this.nodes[nodeInfo];
}
return null;
},
getNodes : function(start, end){
var ns = this.nodes;
startIndex = startIndex || 0;
endIndex = typeof endIndex == 'undefined' ? ns.length-1 : endIndex;
var nodes = [];
for(var i = start; i <= end; i++) {
nodes.push(ns[i]);
}
return nodes;
},
indexOf : function(node){
node = this.getNode(node);
if(typeof node.nodeIndex == 'number'){
return node.nodeIndex;
}
var ns = this.nodes;
for(var i = 0, len = ns.length; i < len; i++) {
if(ns[i] == node){
return i;
}
}
return -1;
}
});
YAHOO.ext.JsonView = function(container, tpl, config){
var cfg = config || {};
cfg.renderUpdates = true;
YAHOO.ext.JsonView.superclass.constructor.call(this, container, tpl, null, config);
};
YAHOO.extendX(YAHOO.ext.JsonView, YAHOO.ext.View, {
load : function(){
var um = this.el.getUpdateManager();
um.update.apply(um, arguments);
}
});