New version: Gideros Studio 2012.09.10

hgvyas123

:-)) )

hgvyas123

why in the world i end up with the above smiley instead of :-))

hgvyas123

)

hgvyas123

yeah finally got my smiley and found some modification in the forum

ar2rsawseen

@hgvyas123 thats just one of @techdojo voodoo ways of preventing you from gaining his star

hgvyas123

ohhhh so finally @techdojo has started some cheating huhhh i always know he is afraid from me

techdojo

Actually @techdojo has fallen foul of that error many many times )

ar2rsawseen

) ) )

hgvyas123

)

by the way anyone knows about the issue of smiley )


edit :- god knows why but it is working now

gorkem

See, Gideros makes developers happy :P

hgvyas123

aha finally found there are two smileys in dropdown with different symbol


: ) ) and : - ) )

without space

moopf

Come on guys, is there any need to fill up this thread with nonsense? Makes it a pain following important threads when you get messages every few minutes that are nothing to do with it or, actually, much to do with anything in particular other than increasing post counts

Sorry for being grumpy.

ar2rsawseen

Kids, shhhhhh, you will wake up the "grumpa"

Scouser

@moopf: I see you're still being Mr. Grumpy. Referenced in This thread

techdojo

@scouser - I see your still hanging around the forums when there's products to develop.., err hang on a minute - D'oh!

hgvyas123

ohhh so no one is taking care about bug i found in forum

:-O

ar2rsawseen

) ) ) this is not a bug but a posting whore filter

SinisterSoft

@atilim When opengl 2.0 arrives will we have z depth?

techdojo

There you go - someone always has to bring the conversation back on track

ar2rsawseen

@SinisterSoft yeah, why are you off-topicing again?

Scouser

Shouldn't that be @SinisterSoft yeah, why are you ON-topicing again? )

ar2rsawseen

)

hgvyas123

Shouldn't that be @SinisterSoft yeah, why are you ON-topicing again? )

)

Mells

@Mells
you, for example, can add a method (or change it some how differently) to Object class, and this method (or other change) will appear in any class that was created used Core.class function (so basically in any class)

I see. It's hard for me to see how useful it could really be without specific examples.
What is possible now that was not possible before?
If it was added, that means that there was a specific need for it and I'd like to understand better.

@atilim when is it useful, can you provide an example?

ar2rsawseen

@Mells here is a quick example from original thread were the thought of root Object born: http://www.giderosmobile.com/forum/discussion/comment/19246#Comment_19246

For example, let's say you want to add a method to every class, that would retrieve a class name, so you could compare:

--if specific instance is of specific class if inst:getClassName() == SomeClass then --do your stuff end

Without root Object, you would have to go through every root class (that does not have someone they inherited from) and add this method to them. It would be like: EventDispatcher, TextureBase, FontBase, Application, Sound, SoundChannel, etc.

But if you have one root Object where everyone inherits from it (internally), you may add this method only to the root Object and all other classes will have this method automatically

bowerandy

@Mells, I suppose since it was my proposal, I ought to give an example or two.

Well, it's exactly like @ar2rsawseen says, it gives you the opportunity to add methods that can be actioned on any object in the system. There shouldn't be any performance penalty unless you actually add code that causes one.

So, for example, you might want a (C++ style) "destructor" to be called when any object is GC'ed. You can do this with:

function Object:enableDestructor() self._proxy = newproxy(true) getmetatable(self._proxy).__gc = function() self:_destroy() end end   function Object:_destroy() end   MyClass=Core.class(Object)   function MyClass:postInit() self:enableDestructor() end   function MyClass:_destroy() print("That's the last you'll see of me") end

You might want to add other methods like getClassName(), to answer the string class name of a particular object.

function getClassName(class) -- Answers a string name for a supplied class object. -- Note, this involves a sequential search through the global table so is -- not particularly fast. -- for k,v in pairs(_G) do if v==class then return k end end end   function Object:getClass() return getmetatable(self) end   function Object:getClassName() return getClassName(self:getClass()) end

You may have seen in another thread that you can use these ideas to implement a system that helps track memory leaks:

http://giderosmobile.com/forum/discussion/2645/help-with-memory-leak#Item_13

I think the good thing about it is that it opens up possibilities that are impossible without it (that destructor idea for example) but there is no performance penalty if you don't use it, so what's not to like?

best regards

Mells

@ar2rsawseen @bowerandy
I see thank you, that was helpful.
I will need to think more about it and see what I could do with it.

So... I believe it could be a solution to my unanswered question there :

is if not kindsof(classname) or something similar available in Gideros?

ar2rsawseen

@Mells yes exactly, if you check that thread I've posted earlier, @bowerandy already proposed the code for "kind of" similar method

bowerandy

@Mells, that thread is perhaps a little confusing since it sort of morphs through a range of different ideas as it progresses.

For a "correct" implementation of isKindOf() one really needs to wind up the superclass chain of the object being tested to see if is a subclass of the supplied class. Unfortunately, @atilim, told me in a PM that the latest release doesn't correctly add a .super field to the builtin classes (like Sprite etc). This means that a real isKindOf() will not yet work consistently.

However, most uses of such a test can make do with a direct class comparison. Lets call this isA(). You can implement this like:

function Object:isA(class) return self:getClass()==class end

Best regards

Mells

@bowerandy
thank you very much.