Hi,
i tried to sublass the navigator as described in "WidgetSubclassingMechanism"
like so:
(function(){
/*jslint node: true, browser: true */
/*global $tw: false */
"use strict";
exports.baseClass = "navigator";
// Specify a different name to make the subclass available as a new widget
instead of overwriting the baseclass:
exports.name = "limited-stack-navigator";
exports.constructor = function(parseTreeNode,options) {
this.initialise(parseTreeNode,options);
};
exports.prototype = {};
exports.prototype.handleNavigateEvent = function(event) {
/*event = $tw.hooks.invokeHook("th-navigating",event);
if(event.navigateTo) {
this.addToStory(event.navigateTo,event.navigateFromTitle);
if(!event.navigateSuppressNavigation) {
this.addToHistory(event.navigateTo,event.navigateFromClientRect);
}
}*/
console.log("HANDLE");
return false;
};
})();
I get the following error: "this.eventListeners is undefined". It seems
that the constructor of widget (the baseclass of navigator) is not called
beforehand (which registers this.eventListeners ). So my basic questions
here are:
1. is this a design flaw? (e.g. the registration for the events inside
of the navigator-constructor is a bad idea ;) )
2. is it not intended to subclass navigator from some reason?
3. am i doing something else (more trivial) wrong in my overwrite-trial
above?
Thanks for your help,
Mirko
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