the "I" scope in (for....) statement

[RusD]

kglad wrote:

> first, if you set a movieclip's _visible property to false or zero, it can't
> detect any mouse events. to remedy set it's _alpha to zero. second, you have
> coding errors in that script, not the least of which is that setRGB() is
> already a flash method.
>

It's all fine with all this. Try to trace 'i' variable and you'l
understand it.

This is correct code :

for(var i=1; i<5; i++) {
_root["b"+i].pair_mc = _root["m"+i];
_root["b"+i].onRollOver=function(){
trace(i+' '+this.pair_mc);
this.pair_mc.setRGB(0xFFFFFF);
}
_root["b"+i].onRollOut=function(){
this.pair_mc.setRGB(0x006600);
}
}

[liangshun]

Hello everyone, I have some problem with the (for ... ) statement.. Basically,
I have 4 invisible movie clip in the stage, they are named b1, b2, b3, b4,
and another 4 movie clip in the stage, they are named m1, m2, m3, m4.

What I want to achieve is when I rollover those invisible movie clip (b1,
b2...), the other movie clip (m1, m2... ) change color, but it seems doesn't
work..... I am wondering if this is something have to do with the scope of
the "i"....

I attached the AS here...

Any help will be appreciated.

Sam

MovieClip.prototype.setRGB=function(col){
(new Color(this)).setRGB(col);
}

for(i=1; i<5; i++) {

_root["b"+i].onRollOver=function(){
_root["m"+i].setRGB(0xFFFFFF);
}

_root["b"+i].onRollOut=function(){
_root["m"+i].setRGB(0x006600);
}

}

[kglad]

first, if you set a movieclip's _visible property to false or zero, it can't
detect any mouse events. to remedy set it's _alpha to zero. second, you have
coding errors in that script, not the least of which is that setRGB() is
already a flash method.

[kglad]

now, you're introducing addtional errors. i is not a persistant variable. if
you want to retreive the "i" associated wiht each of your movieclips you'll
need to store its value in a persistant variable. try:

for (var i = 1; i<5; i++) {
_root["b"+i].pair_mc = _root["m"+i];
_root["b"+i].iVar=i;
_root["b"+i].onRollOver = function() {
trace(this.iVar+' '+this.pair_mc);
this.pair_mc.setRGB(0xFFFFFF);
};
_root["b"+i].onRollOut = function() {
this.pair_mc.setRGB(0x006600);
};
}

and you're still using setRGB() incorrectly. it's not a movieclip method,
it's a color method. see the correct use above.

[kglad]

in fact, just copy and paste this code into your movie and try it:

MovieClip.prototype.colorChange = function(col) {
myC = new Color(this);
myC.setRGB(col);
};
for(i=1; i<5; i++) {
_root["b"+i].onRollOver=function(){
_root["m"+i].colorChange(0xFFFFFF);
}
_root["b"+i].onRollOut=function(){
_root["m"+i].colorChange(0x006600);
}
}

[liangshun]

Thanks a lot ! it works perfect now. ..... I have much better understanding of nested function now.....

Cheers!!

Sam

[liangshun]

Thanks a lot , RusD, kglad!!

Cheers!

Sam

[kglad]

you're very welcome and good luck, sam!

[RusD]

kglad wrote: 
I placed tracing of 'i' variable just to show error. I thought it's clear

[liangshun]

hi RusD, kglad, thanks again for the very helpful explaination.

this line is the key..... :

_root["b"+i].pair_mc = _root["m"+i];

Cheers.

Sam