source: Dev/trunk/src/client/dojox/mobile/app/SceneController.js

dojo.provide("dojox.mobile.app.SceneController");
dojo.experimental("dojox.mobile.app.SceneController");
dojo.require("dojox.mobile._base");

(function(){

        var app = dojox.mobile.app;

        var templates = {};

        dojo.declare("dojox.mobile.app.SceneController", dojox.mobile.View, {

                stageController: null,

                keepScrollPos: false,

                init: function(sceneName, params){
                        // summary:
                        //              Initializes the scene by loading the HTML template and code, if it has
                        //              not already been loaded

                        this.sceneName = sceneName;
                        this.params = params;
                        var templateUrl = app.resolveTemplate(sceneName);

                        this._deferredInit = new dojo.Deferred();

                        if(templates[sceneName]){
                                // If the template has been cached, do not load it again.
                                this._setContents(templates[sceneName]);
                        }else{
                                // Otherwise load the template
                                dojo.xhrGet({
                                        url: templateUrl,
                                        handleAs: "text"
                                }).addCallback(dojo.hitch(this, this._setContents));
                        }

                        return this._deferredInit;
                },

                _setContents: function(templateHtml){
                        // summary:
                        //              Sets the content of the View, and invokes either the loading or
                        //              initialization of the scene assistant.
                        templates[this.sceneName] = templateHtml;

                        this.domNode.innerHTML = "<div>" + templateHtml + "</div>";

                        var sceneAssistantName = "";

                        var nameParts = this.sceneName.split("-");

                        for(var i = 0; i < nameParts.length; i++){
                                sceneAssistantName += nameParts[i].substring(0, 1).toUpperCase()
                                                        + nameParts[i].substring(1);
                        }
                        sceneAssistantName += "Assistant";
                        this.sceneAssistantName = sceneAssistantName;

                        var _this = this;

                        dojox.mobile.app.loadResourcesForScene(this.sceneName, function(){

                                console.log("All resources for ",_this.sceneName," loaded");

                                var assistant;
                                if(typeof(dojo.global[sceneAssistantName]) != "undefined"){
                                        _this._initAssistant();
                                }else{
                                        var assistantUrl = app.resolveAssistant(_this.sceneName);

                                        dojo.xhrGet({
                                                url: assistantUrl,
                                                handleAs: "text"
                                        }).addCallback(function(text){
                                                try{
                                                        dojo.eval(text);
                                                }catch(e){
                                                        console.log("Error initializing code for scene " + _this.sceneName
                                                        + '. Please check for syntax errors');
                                                        throw e;
                                                }
                                                _this._initAssistant();
                                        });
                                }
                        });

                },

                _initAssistant: function(){
                        // summary:
                        //              Initializes the scene assistant. At this point, the View is
                        //              populated with the HTML template, and the scene assistant type
                        //              is declared.

                        console.log("Instantiating the scene assistant " + this.sceneAssistantName);

                        var cls = dojo.getObject(this.sceneAssistantName);

                        if(!cls){
                                throw Error("Unable to resolve scene assistant "
                                                        + this.sceneAssistantName);
                        }

                        this.assistant = new cls(this.params);

                        this.assistant.controller = this;
                        this.assistant.domNode = this.domNode.firstChild;

                        this.assistant.setup();

                        this._deferredInit.callback();
                },

                query: function(selector, node){
                        // summary:
                        //              Queries for DOM nodes within either the node passed in as an argument
                        //              or within this view.

                        return dojo.query(selector, node || this.domNode)
                },

                parse: function(node){
                        var widgets = this._widgets =
                                dojox.mobile.parser.parse(node || this.domNode, {
                                        controller: this
                                });

                        // Tell all widgets what their controller is.
                        for(var i = 0; i < widgets.length; i++){
                                widgets[i].set("controller", this);
                        }
                },

                getWindowSize: function(){
                        // TODO, this needs cross browser testing

                        return {
                                w: dojo.global.innerWidth,
                                h: dojo.global.innerHeight
                        }
                },

                showAlertDialog: function(props){

                        var size = dojo.marginBox(this.assistant.domNode);
                        var dialog = new dojox.mobile.app.AlertDialog(
                                        dojo.mixin(props, {controller: this}));
                        this.assistant.domNode.appendChild(dialog.domNode);

                        console.log("Appended " , dialog.domNode, " to ", this.assistant.domNode);
                        dialog.show();
                },

                popupSubMenu: function(info){
                        var widget = new dojox.mobile.app.ListSelector({
                                controller: this,
                                destroyOnHide: true,
                                onChoose: info.onChoose
                        });

                        this.assistant.domNode.appendChild(widget.domNode);

                        widget.set("data", info.choices);
                        widget.show(info.fromNode);
                }
        });

})();