My hitch() method does this kind of: http://higginsforpresident.net/js/jq.hitch.js
It would look like: this._input.bind('change', $.hitch(this, "_onInputChange")); Regards, Peter Higgins On Wed, Apr 8, 2009 at 12:03 PM, gregory <gregory.tomlin...@gmail.com> wrote: > > the only difficulty I am having with > Balazs Endresz's approach (which I have also > implemented in my environment) is if another developer passes a > function as 'data' param, the results become unpredictable. Though I > don't *think* anybody should be passing a function to access as > event.data, it currently does work to do so. > > though changing the pattern to no longer have the handler as the last > param may cause minor confusion, it should not cause any backward > compatibility issues. > > I have never bench marked the performance of 'return toString.call > (obj) === "[object Function]";' Is this faster than running typeof obj > === "function" ? > > very, very interested in seeing the core of jquery improved to include > a capability to apply correct scope to the handler function > > thanks! > -gregory > > On Mar 29, 3:26 am, Azat Razetdinov <razetdi...@gmail.com> wrote: >> From the updated jQuery 1.4 Roadmap: >> >> > If you need a different object for the scope, why not use the data >> > argument to transport it? >> >> In OOP-style applications the handler is often not an anonymous >> function but a link to the current objects's prototype method: >> >> this._input.bind('change', this._onInputChange, this); >> >> And all prototype methods expect that 'this' points to the current >> object. If one needs the jQuery object, he could happily use >> event.currentTarget to reach it. >> >> One would recommend binding all handlers with anonymous functions, >> e.g.: >> >> var that = this; >> this._input.bind('change', function (event) { that._onInputChange >> (event) }); >> >> 1. It's more verbose. 2. There's no way to unbind this handler. >> >> On Feb 23, 11:56 pm, Azat Razetdinov <razetdi...@gmail.com> wrote: >> >> > Passing handler after scope is not suitable for two reasons: >> >> > 1. There's no way to determine whether data or scope is passed in a >> > three-argument method call. >> > 2. Passing scope after handler is common pattern in JavaScript 1.6 >> > methods like forEach. >> >> > On Dec 25 2008, 11:08 pm, "Eduardo Lundgren" >> >> > <eduardolundg...@gmail.com> wrote: >> > > The isFunction is faster now but still has more coast that when you don't >> > > need to call it. >> >> > > We should keep the handler as the last parameter to fit with the jQuery >> > > API, >> > > the change is compatible with it. >> >> > > $('div').bind('click', {data: true}, scope, *scope.internalHandler*); >> >> > > Scoping events is a good addition to jQuery. >> >> > > Ariel, Joern, John? Let me know if it make sense for you. >> >> > > Thanks, >> > > Eduardo Lundgren >> >> > > On Thu, Dec 25, 2008 at 11:57 AM, Balazs Endresz >> > > <balazs.endr...@gmail.com>wrote: >> >> > > > True, but the new isFunction is a couple of times faster than the old >> > > > one, though it's still many times faster to directly call >> > > > Object.prototype.toString, which is far below 0.001ms. But as the >> > > > callback function is the last parameter everywhere in jQuery it might >> > > > be confusing to change this pattern, it just looked more like binding >> > > > the function with a native method for me. >> >> > > > On Dec 25, 7:06 pm, "Eduardo Lundgren" <eduardolundg...@gmail.com> >> > > > wrote: >> > > > > Hi Balazs, >> >> > > > > Thanks for give us your opinion. >> >> > > > > When you use $.isFunction(data) on the bind method it is very >> > > > > expensive >> > > > when >> > > > > you have a lot of iterations. >> >> > > > > Diff the file I attached with the original file (rev. 5996) I made >> > > > > only a >> > > > > small change on the bind() method, and it's compatible with data and >> > > > > with >> > > > > out API. >> >> > > > > On Thu, Dec 25, 2008 at 3:05 AM, Balazs Endresz < >> > > > balazs.endr...@gmail.com>wrote: >> >> > > > > > Hi, I think this would be really useful! I've also modified jQuery >> > > > > > to >> > > > > > do this a while ago (1.2.6) but with the new scope being the last >> > > > > > argument, so it works without the data object as well: >> >> > > > > > jQuery.fn.bind=function( type, data, fn, bind ) { >> > > > > > return type == "unload" ? this.one(type, data, fn) : >> > > > > > this.each >> > > > > > (function(){ >> > > > > > if( $.isFunction(data) ) >> > > > > > jQuery.event.add( this, type, data, >> > > > bind, fn >> > > > > > ); >> > > > > > else >> > > > > > jQuery.event.add( this, type, fn, >> > > > > > data, >> > > > bind >> > > > > > ); >> > > > > > }); >> > > > > > } >> >> > > > > > jQuery.event = { >> > > > > > add: function(elem, types, handler, data, bind) { >> > > > > > if ( elem.nodeType == 3 || elem.nodeType == 8 ) >> > > > > > return; >> >> > > > > > if( bind != undefined ) >> > > > > > handler = jQuery.bind(handler, bind); >> > > > > > //change >> > > > scope >> > > > > > ... >> >> > > > > > jQuery.each( >> > > > > > ("blur,focus,load,resize,scroll,unload,click,dblclick," + >> >> > > > "mousedown,mouseup,mousemove,mouseover,mouseout,mouseenter,mouseleave," >> > > > > > + >> > > > > > >> > > > > > "change,select,submit,keydown,keypress,keyup,error").split(","), >> > > > > > function(i, name){ >> >> > > > > > // Handle event binding >> > > > > > jQuery.fn[name] = function(fn, bind){ //second argument for >> > > > > > the >> > > > > > scope >> > > > > > return fn ? this.bind(name, fn, bind) : >> > > > this.trigger(name); >> > > > > > }; >> > > > > > }); >> >> > > > > > where jQuery.bind is: >> >> > > > > > jQuery.bind=function( fn, bind ){ >> > > > > > var args = $.makeArray( arguments ).slice(2); >> > > > > > if( args.length == 1 && $.isArray( args[0] ) ) >> > > > > > args = args[0]; >> > > > > > return function(){ >> > > > > > return fn.apply( bind, args ); >> > > > > > } >> > > > > > } >> >> > > > > > On Dec 25, 10:38 am, "Eduardo Lundgren" <eduardolundg...@gmail.com> >> > > > > > wrote: >> > > > > > > Hi guys, >> >> > > > > > > The .bind() method consider the scope of the handler the element >> > > > whose >> > > > > > the >> > > > > > > event is assigned - that is the correct as default. >> >> > > > > > > I've been playing with the event.js and implemented an >> > > > > > > alternative to >> > > > > > call >> > > > > > > .bind(), specifying another scope, that looks useful for our api. >> >> > > > > > > I've attached the event.js modified from the rev. 5996 from the >> > > > trunk. >> > > > > > > The changes are compatible with the current API. >> >> > > > > > > Here goes one example: >> >> > > > > > > var scopeTest = function() { >> > > > > > > this.name = "iamanotherscope"; >> >> > > > > > > this.internalHandler = function(event) { >> > > > > > > console.log("I am another scope method.", >> > > > this.name, >> > > > > > > event, event.data); >> > > > > > > }; >> > > > > > > }; >> >> > > > > > > var scope = new scopeTest(); >> >> > > > > > > $('div').bind('click', {data: true}, globalHandler); >> > > > > > > $('div').bind('click', {data: true}, >> > > > scope.internalHandler); >> > > > > > // >> > > > > > > handler, data, default scope >> > > > > > > $('div').bind('click', {data: true}, scope, >> > > > > > > scope.internalHandler); // handler, data, pre-defined scope >> >> > > > > > > Let me know if make sense for you. >> >> > > > > > > -- >> > > > > > > Eduardo Lundgren >> > > > > > > Software Engineer >> > > > > > > Liferay, Inc. >> > > > > > > Enterprise. Open Source. For Life. >> >> > > > > > > event.js >> > > > > > > 26KViewDownload >> >> > > > > -- >> > > > > Eduardo Lundgren >> > > > > Software Engineer >> > > > > Liferay, Inc. >> > > > > Enterprise. Open Source. For Life. >> >> > > -- >> > > Eduardo Lundgren >> > > Software Engineer >> > > Liferay, Inc. >> > > Enterprise. Open Source. For Life. >