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

define([
        "dojo/_base/lang",
        "dojo/_base/declare",
        "dijit/layout/ContentPane"
], function(lang, declare, ContentPane){
  
return declare("dojox.widget.WizardPane", ContentPane, {
        // summary:
        //              A panel in a `dojox.widget.Wizard`
        // description:
        //              An extended ContentPane with additional hooks for passing named
        //              functions to prevent the pane from going either forward or
        //              backwards.

        // canGoBack: Boolean
        //              If true, then can move back to a previous panel (by clicking the "Previous" button)
        canGoBack: true,

        // passFunction: String
        //              Name of function that checks if it's OK to advance to the next panel.
        //              If it's not OK (for example, mandatory field hasn't been entered), then
        //              returns an error message (String) explaining the reason. Can return null (pass)
        //              or a Boolean (true == pass)
        passFunction: null,
        
        // doneFunction: String
        //              Name of function that is run if you press the "Done" button from this panel
        doneFunction: null,

        startup: function(){
                this.inherited(arguments);
                if(this.isFirstChild){ this.canGoBack = false; }
                if(lang.isString(this.passFunction)){
                        this.passFunction = lang.getObject(this.passFunction);
                }
                if(lang.isString(this.doneFunction) && this.doneFunction){
                        this.doneFunction = lang.getObject(this.doneFunction);
                }
        },

        _onShow: function(){
                if(this.isFirstChild){ this.canGoBack = false; }
                this.inherited(arguments);
        },

        _checkPass: function(){
                // summary:
                //              Called when the user presses the "next" button.
                //              Calls passFunction to see if it's OK to advance to next panel, and
                //              if it isn't, then display error.
                //              Returns true to advance, false to not advance. If passFunction
                //              returns a string, it is assumed to be a custom error message, and
                //              is alert()'ed
                var r = true;
                if(this.passFunction && lang.isFunction(this.passFunction)){
                        var failMessage = this.passFunction();
                        switch(typeof failMessage){
                                case "boolean":
                                        r = failMessage;
                                        break;
                                case "string":
                                        alert(failMessage);
                                        r = false;
                                        break;
                        }
                }
                return r; // Boolean
        },

        done: function(){
                if(this.doneFunction && lang.isFunction(this.doneFunction)){ this.doneFunction(); }
        }
});

});