source: Dev/trunk/src/client/dojox/widget/DynamicTooltip.js

dojo.provide("dojox.widget.DynamicTooltip");
dojo.experimental("dojox.widget.DynamicTooltip");

dojo.require("dijit.Tooltip");
dojo.requireLocalization("dijit", "loading");

dojo.declare("dojox.widget.DynamicTooltip", dijit.Tooltip,
        {
                // summary:
                //              Extension of dijit.Tooltip providing content set via XHR
                //              request via href param

                // hasLoaded: Boolean
                //              false if the contents are yet to be loaded from the HTTP request
                hasLoaded: false,
                
                // href: String
                //              location from where to fetch the contents
                href: "",
                
                // label: String
                //              contents to display in the tooltip. Initialized to a loading icon.
                label: "",

                // preventCache: Boolean
                //              Cache content retrieved externally
                preventCache:   false,
                
                postMixInProperties: function(){
                        this.inherited(arguments);
                        this._setLoadingLabel();
                },
                
                _setLoadingLabel: function(){
                        // summary:
                        //              Changes the tooltip label / contents to loading message, only if
                        //              there's an href param, otherwise acts as normal tooltip

                        if(this.href){
                                this.label = dojo.i18n.getLocalization("dijit", "loading", this.lang).loadingState;
                        }
                },

                // MOW: this is a new widget, do we really need a deprecated stub?
                // setHref: function(/*String|Uri*/ href){
                //      // summary:
                //      //              Deprecated.   Use set('href', ...) instead.
                //      dojo.deprecated("dojox.widget.DynamicTooltip.setHref() is deprecated.   Use set('href', ...) instead.", "", "2.0");
                //      return this.set("href", href);
                // },

                _setHrefAttr: function(/*String|Uri*/ href){
                        // summary:
                        //              Hook so attr("href", ...) works.
                        // description:
                        //              resets so next show loads new href
                        // href:
                        //              url to the content you want to show, must be within the same domain as your mainpage
                
                        this.href = href;
                        this.hasLoaded = false;
                },
                
                loadContent: function(node){
                        // summary:
                        //              Download contents of href via XHR and display
                        // description:
                        //              1. checks if content already loaded
                        //              2. if not, sends XHR to download new data
                        if(!this.hasLoaded && this.href){
                                this._setLoadingLabel();
                                this.hasLoaded = true;
                                
                                dojo.xhrGet({
                                        url: this.href,
                                        handleAs: "text",
                                        tooltipWidget: this,
                                        load: function(response, ioArgs){
                                                this.tooltipWidget.label = response;
                                                this.tooltipWidget.close();
                                                this.tooltipWidget.open(node);
                                        },
                                        preventCache: this.preventCache
                                });
                        }
                },
                
                refresh: function(){
                        // summary:
                        //              Allows re-download of contents of href and display
                        //              Useful with preventCache = true

                        this.hasLoaded = false;
                },
                
                open: function(/*DomNode*/ target){
                        // summary:
                        //              Display the tooltip; usually not called directly.
                        
                        target = target || (this._connectNodes && this._connectNodes[0]);
                        if(!target){ return; }

                        this.loadContent(target);
                        this.inherited(arguments);
                }
        }
);