pure actionscript preloader

[firegambler]

hi,

actually i am trying to get a little insight into this whole object orientated thing. so i want to create a preloader which is pure code.
the problem is that the variable showing the percent loaded does not update, it stays at zero (at least that's what the textfield shows me); the variable that should show me the current frame of _root stays at 1 however the music that starts with frame 2 in my testfile can be heard.
finally the dynamically created textfields disappear when the film jumps to frame 2.

could anybody please correct my code and tell me why it didn't work?
i am not quite a newbie to flash but i am as far as it concernes object orientated programming...

thanks a lot

here is my code (which is positioned on the first frame of the root):

_root.stop();
finishedloading = 0;
Preloader=new MovieClip();
MovieClip.prototype.makeTextfields=function(){
	//textfield for percentage
	_root.createTextField("percent",2,10,10,50,20);
	percent.type="dynamic";
	percent.variable="_root.percent";
	percent.border=true;
	percent.background=true;
	percent.backgroundColor="0x00ffff";
	
	//textfield for current (root)frame - just to see where we are while developing the code
	_root.createTextField("WhereAmI",1,10,40,50,20);
	WhereAmI.type="dynamic";
	WhereAmI.variable="_root.whereami";
	WhereAmI.border=true;
	WhereAmI.background=true;
	WhereAmI.backgroundColor="0x00ff00";
	
	// textStyle
	format=new TextFormat();
	format.font="Arial";
	format.bold="true";
	format.size="16";
	format.align="right";
	format.color="0x000066";
	//attach format to textfields
	WhereAmI.setTextFormat(format);
	percent.setTextFormat(format);
}// end of makeTextfields()

MovieClip.prototype.preload = function() {
	total = getBytesTotal();
	loaded = getBytesLoaded();
	percent = Math.round(100*loaded/total);
	_root.percent = percent+"%";
	_root.whereami = _root._currentframe;
	if (finishedloading==0) {
		if (percent == "100%") {
			_root.nextFrame();
			finishedloading = 1;
		}		//end of if-condition
	}	//end of if-condition
}//end of preload()
Preloader.createEmptyMovieClip(MCPreloader,1);
MCPreloader.onLoad=makeTextfields();
MCPreloader.onEnterFrame = preload();

regards

 

[billwatson]

i cant see why you have these prototypes. however that said you might want to look at this prototype for preloding

http://www.layer51.com/proto/d.aspx?f=475

 

[firegambler]

well,

what i am trying to do is creating the whole preloader via script.
that is why i want to make a function and add it via prototype to the movieclip-class.
then i'd like to create a movieclip (via script) that will do the preloading work (supplying the variables for percentage,... with the relevant values).

then when i got that (and understood that) i want to create a preloader-bar and control its width,... via script.

it is not that this would be outstanding urgent, it is just that i am pretty keen on finally understanding that whole object orientated "crap"
and i guess that would be a pretty usable mini-project on the one hand to learn that kind of scripting and on the other hand having a preloader weighing almost 0k.


anyway thanks for the link, i guess it is pretty related to what i am trying to do and i'll have to do a little reflection on this to make this more transparent to my designers brain (which is trying to become also a programmer's one )

furthermore i'd appreciate additional comments to help me correct my code (unless it is so screwed up that i can't do anything exept filling up my garbage with it ;-))


best

regards

 

[billwatson]

i didnt realy go through your code. i just glanced at it and... well thought....prototype preloader thats been done........


making a preloader that just has actionscript might be a way to get at object oriented programming but it just includes a bar....which will probably only have 3 properties...width, height and color

the link i gave has little to do with what you want.

maybe this would be a better one

http://www.ultrashock.com

go to, tutorials, mx, and look at 'intoduction to listners'

and maybe a few other there like asbroadcaster. these are not directly tuts on OOP but to me they show the principles in an easy to understand model.

anyway its like riding a bike or learning to swim...hard at first...then so so straightforward....just stick with it and it will all come together.