767 lines
26 KiB
JavaScript
767 lines
26 KiB
JavaScript
/**
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* @class YAHOO.ext.View
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* @extends YAHOO.ext.util.Observable
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* Create a "View" for an element based on a data model or UpdateManager and the supplied DomHelper template.
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* This class also supports single and multi selection modes. <br>
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* Create a data model bound view:
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<pre><code>
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var dataModel = new YAHOO.ext.grid.XMLDataModel(...);
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var view = new YAHOO.ext.View('my-element',
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'<div id="{0}">{2} - {1}</div>', // auto create template
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dataModel, {
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singleSelect: true,
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selectedClass: 'ydataview-selected'
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});
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// listen for node click?
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view.on('click', function(vw, index, node, e){
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alert('Node "' + node.id + '" at index: ' + index + ' was clicked.');
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});
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// load XML data
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dataModel.load('foobar.xml');
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</code></pre>
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For an example of creating a JSON/UpdateManager view, see {@link YAHOO.ext.JsonView}.
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* <br><br>
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* <b>Note: The root of your template must be a single node. Table/row implementations may work but are not supported due to
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* IE's limited insertion support with tables and Opera's faulty event bubbling.</b>
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* @constructor
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* Create a new View
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* @param {String/HTMLElement/Element} container The container element where the view is to be rendered.
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* @param {String/DomHelper.Template} tpl The rendering template or a string to create a template with
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* @param {DataModel} dataModel The bound data model
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* @param {Object} config The config object
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*/
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YAHOO.ext.View = function(container, tpl, dataModel, config){
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this.el = getEl(container, true);
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this.nodes = this.el.dom.childNodes;
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if(typeof tpl == 'string'){
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tpl = new YAHOO.ext.Template(tpl);
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}
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tpl.compile();
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/**
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* The template used by this View
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* @type {YAHOO.ext.DomHelper.Template}
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*/
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this.tpl = tpl;
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this.setDataModel(dataModel);
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var CE = YAHOO.util.CustomEvent;
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/** @private */
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this.events = {
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/**
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* @event beforeclick
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* Fires before a click is processed. Returns false to cancel the default action.
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* @param {YAHOO.ext.View} this
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* @param {Number} index The index of the target node
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* @param {HTMLElement} node The target node
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* @param {YAHOO.ext.EventObject} e The raw event object
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*/
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'beforeclick' : true,
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/**
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* @event click
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* Fires when a template node is clicked.
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* @param {YAHOO.ext.View} this
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* @param {Number} index The index of the target node
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* @param {HTMLElement} node The target node
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* @param {YAHOO.ext.EventObject} e The raw event object
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*/
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'click' : true,
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/**
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* @event dblclick
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* Fires when a template node is double clicked.
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* @param {YAHOO.ext.View} this
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* @param {Number} index The index of the target node
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* @param {HTMLElement} node The target node
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* @param {YAHOO.ext.EventObject} e The raw event object
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*/
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'dblclick' : true,
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/**
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* @event contextmenu
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* Fires when a template node is right clicked.
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* @param {YAHOO.ext.View} this
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* @param {Number} index The index of the target node
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* @param {HTMLElement} node The target node
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* @param {YAHOO.ext.EventObject} e The raw event object
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*/
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'contextmenu' : true,
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/**
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* @event selectionchange
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* Fires when the selected nodes change.
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* @param {YAHOO.ext.View} this
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* @param {Array} selections Array of the selected nodes
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*/
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'selectionchange' : true,
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/**
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* @event beforeselect
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* Fires before a selection is made. If any handlers return false, the selection is cancelled.
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* @param {YAHOO.ext.View} this
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* @param {HTMLElement} node The node to be selected
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* @param {Array} selections Array of currently selected nodes
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*/
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'beforeselect' : true
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};
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this.el.mon("click", this.onClick, this, true);
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this.el.mon("dblclick", this.onDblClick, this, true);
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this.el.mon("contextmenu", this.onContextMenu, this, true);
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/**
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* The css class to add to selected nodes
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* @type {YAHOO.ext.DomHelper.Template}
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*/
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this.selectedClass = 'ydataview-selected';
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this.emptyText = '';
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this.selections = [];
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this.lastSelection = null;
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/**
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* The root property in the loaded json object that contains the data
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* @type {String}
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*/
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this.jsonRoot = null;
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YAHOO.ext.util.Config.apply(this, config);
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if(this.renderUpdates || this.jsonRoot){
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var um = this.el.getUpdateManager();
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um.setRenderer(this);
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}
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};
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YAHOO.extendX(YAHOO.ext.View, YAHOO.ext.util.Observable, {
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/**
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* Returns the element this view is bound to.
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* @return {YAHOO.ext.Element}
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*/
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getEl : function(){
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return this.el;
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},
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render : function(el, response){
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this.clearSelections();
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this.el.update('');
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var o;
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try{
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o = YAHOO.ext.util.JSON.decode(response.responseText);
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if(this.jsonRoot){
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o = eval('o.' + this.jsonRoot);
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}
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}catch(e){}
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/**
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* The current json data or null
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*/
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this.jsonData = o;
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this.beforeRender();
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this.refresh();
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},
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beforeRender : function(){
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},
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/**
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* Refreshes the view.
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*/
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refresh : function(){
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this.clearSelections();
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this.el.update('');
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this.html = [];
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if(this.renderUpdates || this.jsonRoot){
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var o = this.jsonData;
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if(o){
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for(var i = 0, len = o.length; i < len; i++) {
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this.renderEach(o[i]);
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}
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}
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}else{
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this.dataModel.each(this.renderEach, this);
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}
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var strHtml;
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if(this.html.length > 0){
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strHtml = this.html.join('');
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}else{
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strHtml = this.emptyText;
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}
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this.el.update(strHtml);
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this.html = null;
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this.nodes = this.el.dom.childNodes;
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this.updateIndexes(0);
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},
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/**
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* Function to override to reformat the data that is sent to
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* the template for each node.
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* @param {Array/Object} data The raw data (array of colData for a data model bound view or
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* a JSON object for an UpdateManager bound view).
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* @param {Number} index The index of the data within the data model
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*/
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prepareData : function(data, index){
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return data;
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},
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renderEach : function(data){
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this.html[this.html.length] = this.tpl.applyTemplate(this.prepareData(data));
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},
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/**
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* Refresh an individual node.
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* @param {Number} index
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*/
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refreshNode : function(index){
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this.refreshNodes(index, index);
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},
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refreshNodes : function(dm, startIndex, endIndex){
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this.clearSelections();
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var dm = this.dataModel;
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var ns = this.nodes;
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for(var i = startIndex; i <= endIndex; i++){
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var d = this.prepareData(dm.getRow(i), i);
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if(i < ns.length-1){
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var old = ns[i];
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this.tpl.insertBefore(old, d);
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this.el.dom.removeChild(old);
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}else{
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this.tpl.append(this.el.dom, d);
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}
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}
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this.updateIndexes(startIndex, endIndex);
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},
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deleteNodes : function(dm, startIndex, endIndex){
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this.clearSelections();
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if(startIndex == 0 && endIndex >= this.nodes.length-1){
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this.el.update('');
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}else{
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var el = this.el.dom;
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for(var i = startIndex; i <= endIndex; i++){
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el.removeChild(this.nodes[startIndex]);
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}
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this.updateIndexes(startIndex);
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}
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},
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insertNodes : function(dm, startIndex, endIndex){
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if(this.nodes.length == 0){
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this.refresh();
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}else{
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this.clearSelections();
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var t = this.tpl;
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var before = this.nodes[startIndex];
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var dm = this.dataModel;
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if(before){
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for(var i = startIndex; i <= endIndex; i++){
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t.insertBefore(before, this.prepareData(dm.getRow(i), i));
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}
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}else{
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var el = this.el.dom;
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for(var i = startIndex; i <= endIndex; i++){
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t.append(el, this.prepareData(dm.getRow(i), i));
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}
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}
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this.updateIndexes(startIndex);
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}
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},
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updateIndexes : function(dm, startIndex, endIndex){
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var ns = this.nodes;
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startIndex = startIndex || 0;
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endIndex = endIndex || ns.length-1;
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for(var i = startIndex; i <= endIndex; i++){
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ns[i].nodeIndex = i;
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}
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},
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/**
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* Changes the data model this view uses and refresh the view.
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* @param {DataModel} dataModel
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*/
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setDataModel : function(dm){
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if(!dm) return;
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this.unplugDataModel(this.dataModel);
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this.dataModel = dm;
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dm.on('cellupdated', this.refreshNode, this, true);
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dm.on('datachanged', this.refresh, this, true);
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dm.on('rowsdeleted', this.deleteNodes, this, true);
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dm.on('rowsinserted', this.insertNodes, this, true);
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dm.on('rowsupdated', this.refreshNodes, this, true);
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dm.on('rowssorted', this.refresh, this, true);
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this.refresh();
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},
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/**
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* Unplug the data model and stop updates.
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* @param {DataModel} dataModel
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*/
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unplugDataModel : function(dm){
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if(!dm) return;
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dm.removeListener('cellupdated', this.refreshNode, this);
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dm.removeListener('datachanged', this.refresh, this);
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dm.removeListener('rowsdeleted', this.deleteNodes, this);
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dm.removeListener('rowsinserted', this.insertNodes, this);
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dm.removeListener('rowsupdated', this.refreshNodes, this);
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dm.removeListener('rowssorted', this.refresh, this);
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this.dataModel = null;
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},
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/**
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* Returns the template node the passed child belongs to or null if it doesn't belong to one.
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* @param {HTMLElement} node
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* @return {HTMLElement} The template node
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*/
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findItemFromChild : function(node){
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var el = this.el.dom;
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if(!node || node.parentNode == el){
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return node;
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}
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var p = node.parentNode;
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while(p && p != el){
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if(p.parentNode == el){
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return p;
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}
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p = p.parentNode;
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}
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return null;
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},
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/** @ignore */
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onClick : function(e){
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var item = this.findItemFromChild(e.getTarget());
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if(item){
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var index = this.indexOf(item);
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if(this.onItemClick(item, index, e) !== false){
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this.fireEvent('click', this, index, item, e);
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}
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}else{
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this.clearSelections();
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}
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},
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/** @ignore */
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onContextMenu : function(e){
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var item = this.findItemFromChild(e.getTarget());
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if(item){
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this.fireEvent('contextmenu', this, this.indexOf(item), item, e);
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}
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},
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/** @ignore */
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onDblClick : function(e){
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var item = this.findItemFromChild(e.getTarget());
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if(item){
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this.fireEvent('dblclick', this, this.indexOf(item), item, e);
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}
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},
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onItemClick : function(item, index, e){
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if(this.fireEvent('beforeclick', this, index, item, e) !== false){
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if(this.multiSelect || this.singleSelect){
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if(this.multiSelect && e.shiftKey && this.lastSelection){
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this.select(this.getNodes(this.indexOf(this.lastSelection), index), false);
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}else{
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this.select(item, this.multiSelect && e.ctrlKey);
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this.lastSelection = item;
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}
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e.preventDefault();
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}
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return true;
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}else{
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return false;
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}
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},
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/**
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* Get the number of selected nodes.
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* @return {Number}
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*/
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getSelectionCount : function(){
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return this.selections.length;
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},
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/**
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* Get the currently selected nodes.
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* @return {Array} An array of HTMLElements
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*/
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getSelectedNodes : function(){
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return this.selections;
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},
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/**
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* Get the indexes of the selected nodes.
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* @return {Array}
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*/
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getSelectedIndexes : function(){
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var indexes = [];
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for(var i = 0, len = this.selections.length; i < len; i++) {
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indexes.push(this.selections[i].nodeIndex);
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}
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return indexes;
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},
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/**
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* Clear all selections
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* @param {Boolean} suppressEvent (optional) true to skip firing of the selectionchange event
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*/
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clearSelections : function(suppressEvent){
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if(this.multiSelect || this.singleSelect){
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YAHOO.util.Dom.removeClass(this.selections, this.selectedClass);
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this.selections = [];
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if(!suppressEvent){
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this.fireEvent('selectionchange', this, this.selections);
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}
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}
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},
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/**
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* Returns true if the passed node is selected
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* @param {HTMLElement/Number} node The node or node index
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* @return {Boolean}
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*/
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isSelected : function(node){
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node = this.getNode(node);
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var s = this.selections;
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if(s.length < 1){
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return false;
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}
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if(s.indexOf){
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return s.indexOf(node) !== -1;
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}else{
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for(var i = 0, len = s.length; i < len; i++){
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if (s[i] == node){
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return true;
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}
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}
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return false;
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}
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},
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/**
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* Selects nodes.
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* @param {Array/HTMLElement/String/Number} nodeInfo An HTMLElement template node, index of a template node, id of a template node or an array of any of those to select
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* @param {Boolean} keepExisting (optional) true to keep existing selections
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* @param {Boolean} suppressEvent (optional) true to skip firing of the selectionchange vent
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*/
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select : function(nodeInfo, keepExisting, suppressEvent){
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if(!keepExisting){
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this.clearSelections(true);
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}
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if(nodeInfo instanceof Array){
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for(var i = 0, len = nodeInfo.length; i < len; i++) {
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this.select(nodeInfo[i], true, true);
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}
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}else{
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var node = this.getNode(nodeInfo);
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if(node && !this.isSelected(node)){
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if(this.fireEvent('beforeselect', this, node, this.selections) !== false){
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YAHOO.util.Dom.addClass(node, this.selectedClass);
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this.selections.push(node);
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}
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}
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}
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if(!suppressEvent){
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this.fireEvent('selectionchange', this, this.selections);
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}
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},
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/**
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* Gets a template node.
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* @param {HTMLElement/String/Number} nodeInfo An HTMLElement template node, index of a template node or the id of a template node
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* @return {HTMLElement} The node or null if it wasn't found
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*/
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getNode : function(nodeInfo){
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if(typeof nodeInfo == 'object'){
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return nodeInfo;
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}else if(typeof nodeInfo == 'string'){
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return document.getElementById(nodeInfo);
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}else if(typeof nodeInfo == 'number'){
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return this.nodes[nodeInfo];
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}
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return null;
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},
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/**
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* Gets a range template nodes.
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* @param {Number} startIndex
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* @param {Number} endIndex
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* @return {Array} An array of nodes
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*/
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getNodes : function(start, end){
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var ns = this.nodes;
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start = start || 0;
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end = typeof end == 'undefined' ? ns.length-1 : end;
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var nodes = [];
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if(start <= end){
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for(var i = start; i <= end; i++) {
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nodes.push(ns[i]);
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}
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}else{
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for(var i = start; i >= end; i--) {
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nodes.push(ns[i]);
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}
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}
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return nodes;
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},
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/**
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* Finds the index of the passed node
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* @param {HTMLElement/String/Number} nodeInfo An HTMLElement template node, index of a template node or the id of a template node
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* @return {Number} The index of the node or -1
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*/
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indexOf : function(node){
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node = this.getNode(node);
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if(typeof node.nodeIndex == 'number'){
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return node.nodeIndex;
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}
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var ns = this.nodes;
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for(var i = 0, len = ns.length; i < len; i++) {
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if(ns[i] == node){
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return i;
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}
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}
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return -1;
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}
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});
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/**
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* @class YAHOO.ext.JsonView
|
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* @extends YAHOO.ext.View
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* Shortcut class to create a JSON + UpdateManager template view. Usage:
|
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<pre><code>
|
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var view = new YAHOO.ext.JsonView('my-element',
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'<div id="{id}">{foo} - {bar}</div>', // auto create template
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|
{ multiSelect: true, jsonRoot: 'data' });
|
|
|
|
// listen for node click?
|
|
view.on('click', function(vw, index, node, e){
|
|
alert('Node "' + node.id + '" at index: ' + index + ' was clicked.');
|
|
});
|
|
|
|
// direct load of JSON data
|
|
view.load('foobar.php');
|
|
|
|
|
|
// Example from my blog list
|
|
var tpl = new YAHOO.ext.Template(
|
|
'<div class="entry">' +
|
|
'<a class="entry-title" href="{link}">{title}</a>' +
|
|
'<h4>{date} by {author} | {comments} Comments</h4>{description}' +
|
|
'</div><hr />'
|
|
);
|
|
|
|
var moreView = new YAHOO.ext.JsonView('entry-list', tpl, {
|
|
jsonRoot: 'posts'
|
|
});
|
|
moreView.on('beforerender', this.sortEntries, this, true);
|
|
moreView.load({
|
|
url:'/blog/get-posts.php',
|
|
params: 'allposts=true',
|
|
text:'Loading Blog Entries...'
|
|
});
|
|
</code></pre>
|
|
* @constructor
|
|
* Create a new JsonView
|
|
* @param {String/HTMLElement/Element} container The container element where the view is to be rendered.
|
|
* @param {DomHelper.Template} tpl The rendering template
|
|
* @param {Object} config The config object
|
|
*/
|
|
YAHOO.ext.JsonView = function(container, tpl, config){
|
|
var cfg = config || {};
|
|
cfg.renderUpdates = true;
|
|
YAHOO.ext.JsonView.superclass.constructor.call(this, container, tpl, null, cfg);
|
|
/**
|
|
* @event beforerender
|
|
* Fires before rendering of the downloaded json data.
|
|
* @param {YAHOO.ext.View} this
|
|
* @param {Object} data The json data loaded
|
|
*/
|
|
this.events['beforerender'] = true;
|
|
/**
|
|
* @event load
|
|
* Fires when data is loaded.
|
|
* @param {YAHOO.ext.View} this
|
|
* @param {Object} data The json data loaded
|
|
* @param {Object} response The raw Connect response object
|
|
*/
|
|
this.events['load'] = true;
|
|
/**
|
|
* @event loadexception
|
|
* Fires when loading fails.
|
|
* @param {YAHOO.ext.View} this
|
|
* @param {Object} response The raw Connect response object
|
|
*/
|
|
this.events['loadexception'] = true;
|
|
this.el.getUpdateManager().on('update', this.onLoad, this, true);
|
|
this.el.getUpdateManager().on('failure', this.onLoadException, this, true);
|
|
};
|
|
YAHOO.extendX(YAHOO.ext.JsonView, YAHOO.ext.View, {
|
|
/**
|
|
* Performs an async request, loading the JSON from the response. If params are specified it uses POST, otherwise it uses GET.
|
|
* @param {Object/String/Function} url The url for this request or a function to call to get the url or a config object containing any of the following options:
|
|
<pre><code>
|
|
view.load({
|
|
url: 'your-url.php',<br/>
|
|
params: {param1: 'foo', param2: 'bar'}, // or a URL encoded string<br/>
|
|
callback: yourFunction,<br/>
|
|
scope: yourObject, //(optional scope) <br/>
|
|
discardUrl: false, <br/>
|
|
nocache: false,<br/>
|
|
text: 'Loading...',<br/>
|
|
timeout: 30,<br/>
|
|
scripts: false<br/>
|
|
});
|
|
</code></pre>
|
|
* The only required property is url. The optional properties nocache, text and scripts
|
|
* are shorthand for disableCaching, indicatorText and loadScripts and are used to set their associated property on this UpdateManager instance.
|
|
* @param {<i>String/Object</i>} params (optional) The parameters to pass as either a url encoded string "param1=1&param2=2" or an object {param1: 1, param2: 2}
|
|
* @param {<i>Function</i>} callback (optional) Callback when transaction is complete - called with signature (oElement, bSuccess)
|
|
* @param {<i>Boolean</i>} discardUrl (optional) By default when you execute an update the defaultUrl is changed to the last used url. If true, it will not store the url.
|
|
*/
|
|
load : function(){
|
|
var um = this.el.getUpdateManager();
|
|
um.update.apply(um, arguments);
|
|
},
|
|
|
|
/**
|
|
* Get the number of records in the current JSON dataset
|
|
* @return {Number}
|
|
*/
|
|
getCount : function(){
|
|
return this.jsonData ? this.jsonData.length : 0;
|
|
},
|
|
|
|
/**
|
|
* Returns the JSON object for the specified node(s)
|
|
* @param {HTMLElement/Array} node The node or an array of nodes
|
|
* @return {Object/Array} If you pass in an array, you get an array back, otherwise
|
|
* you get the JSON object for the node
|
|
*/
|
|
getNodeData : function(node){
|
|
if(node instanceof Array){
|
|
var data = [];
|
|
for(var i = 0, len = node.length; i < len; i++){
|
|
data.push(this.getNodeData(node[i]));
|
|
}
|
|
return data;
|
|
}
|
|
return this.jsonData[this.indexOf(node)] || null;
|
|
},
|
|
|
|
beforeRender : function(){
|
|
this.snapshot = this.jsonData;
|
|
if(this.sortInfo){
|
|
this.sort.apply(this, this.sortInfo);
|
|
}
|
|
this.fireEvent('beforerender', this, this.jsonData);
|
|
},
|
|
|
|
onLoad : function(el, o){
|
|
this.fireEvent('load', this, this.jsonData, o);
|
|
},
|
|
|
|
onLoadException : function(el, o){
|
|
this.fireEvent('loadexception', this, o);
|
|
},
|
|
|
|
/**
|
|
* Filter the data by a specific property.
|
|
* @param {String} property A property on your JSON objects
|
|
* @param {String/RegExp} value Either string that the property values
|
|
* should start with or a RegExp to test against the property
|
|
*/
|
|
filter : function(property, value){
|
|
if(this.jsonData){
|
|
var data = [];
|
|
var ss = this.snapshot;
|
|
if(typeof value == 'string'){
|
|
var vlen = value.length;
|
|
if(vlen == 0){
|
|
this.clearFilter();
|
|
return;
|
|
}
|
|
value = value.toLowerCase();
|
|
for(var i = 0, len = ss.length; i < len; i++){
|
|
var o = ss[i];
|
|
if(o[property].substr(0, vlen).toLowerCase() == value){
|
|
data.push(o);
|
|
}
|
|
}
|
|
}else if(value.exec){ // regex?
|
|
for(var i = 0, len = ss.length; i < len; i++){
|
|
var o = ss[i];
|
|
if(value.test(o[property])){
|
|
data.push(o);
|
|
}
|
|
}
|
|
}else{
|
|
return;
|
|
}
|
|
this.jsonData = data;
|
|
this.refresh();
|
|
}
|
|
},
|
|
|
|
/**
|
|
* Filter by a function. The passed function will be called with each
|
|
* object in the current dataset. If the function returns true, the value is kept
|
|
* otherwise it is filtered.
|
|
* @param {Function} fn
|
|
* @param {Object} scope (optional) The scope of the function (defaults to this JsonView)
|
|
*/
|
|
filterBy : function(fn, scope){
|
|
if(this.jsonData){
|
|
var data = [];
|
|
var ss = this.snapshot;
|
|
for(var i = 0, len = ss.length; i < len; i++){
|
|
var o = ss[i];
|
|
if(fn.call(scope|| this, o)){
|
|
data.push(o);
|
|
}
|
|
}
|
|
this.jsonData = data;
|
|
this.refresh();
|
|
}
|
|
},
|
|
|
|
/**
|
|
* Clears the current filter.
|
|
*/
|
|
clearFilter : function(){
|
|
if(this.snapshot && this.jsonData != this.snapshot){
|
|
this.jsonData = this.snapshot;
|
|
this.refresh();
|
|
}
|
|
},
|
|
|
|
|
|
/**
|
|
* Sorts the data for this view and refreshes it.
|
|
* @param {String} property A property on your JSON objects to sort on
|
|
* @param {String} direction (optional) desc or asc (defaults to asc)
|
|
* @param {Function} sortType (optional) A function to call to convert the data to a sortable value.
|
|
*/
|
|
sort : function(property, dir, sortType){
|
|
this.sortInfo = Array.prototype.slice.call(arguments, 0);
|
|
if(this.jsonData){
|
|
var p = property;
|
|
var dsc = dir && dir.toLowerCase() == 'desc';
|
|
var f = function(o1, o2){
|
|
var v1 = sortType ? sortType(o1[p]) : o1[p];
|
|
var v2 = sortType ? sortType(o2[p]) : o2[p];;
|
|
if(v1 < v2){
|
|
return dsc ? +1 : -1;
|
|
}else if(v1 > v2){
|
|
return dsc ? -1 : +1;
|
|
}else{
|
|
return 0;
|
|
}
|
|
};
|
|
this.jsonData.sort(f);
|
|
this.refresh();
|
|
if(this.jsonData != this.snapshot){
|
|
this.snapshot.sort(f);
|
|
}
|
|
}
|
|
}
|
|
});
|