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Fade in/fade out button in flash

Posted on 2007-03-21
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Last Modified: 2010-04-03
I need a make an animated button in Flash that just fades in from alpha 0 to alpha 100 on rollover, and fades back out on rollout.  I would prefer to do it with AS, and have 'walked' through several tutorials on google, but I'm just not getting the jist of it...

(I have found some EE question/solutions on this, but the links to the solutions have expired or now broken, or refer to older versions, I am now using Flash 8, if that matters a whole lot)
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Question by:cdr21
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6 Comments
 
LVL 5

Expert Comment

by:victmo
ID: 18767561
Hi cdr21,

You can do the following...

1.- Create a movieclip which is gonna be you button, it can contain an image or any graphic.
2.- Create a new layer inside your movieclip (this is where we're putting the code)
3.- Add the following actionscript in the first frame of the layer you just created:

tvar initAlpha = 50; //Chage to set the starting alpha value
var vel = 0.3; //Change to set the velocity of the fade in/out, Max value = 1

this.newAlpha=initAlpha;
this.onEnterFrame=function(){_alpha+=(newAlpha-_alpha)*vel;};
this.onRollOver=function(){newAlpha=100;};
this.onRollOut=this.onReleaseOutside=function(){na=0;};

Good Luck,

Vic
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Author Comment

by:cdr21
ID: 18767760
Ok I did the following:

Inserted a new layer where the button needs to live on the main timeline
Drew a new rectangle to serve as the button; converted it to a MC, called it anim1
Double clicked in the new rectangle MC, to acces its timeline
Pasted your code in the first frame
Saved everything... tried the movie... just seeing a new blue rectangle I just drew, no animation :(

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LVL 5

Accepted Solution

by:
victmo earned 2000 total points
ID: 18768514
Hi Again,

Sorry, I had some finger problems...
on the first line its "var", not "tvar"...
on the last line its "newAlpha=0", not "na=0"...

Please try it and tell me if it works. The corrected code goes as follow:

var initAlpha = 50; //Chage to set the starting alpha value
var vel = 0.3; //Change to set the velocity of the fade in/out, Max value = 1

this.newAlpha=initAlpha;
this.onEnterFrame=function(){_alpha+=(newAlpha-_alpha)*vel;};
this.onRollOver=function(){newAlpha=100;};
this.onRollOut=this.onReleaseOutside=function(){newAlpha=0;};

Good luck,

Vic
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Author Comment

by:cdr21
ID: 18769046

Hey, Vic, that works!

Where should I put a geturl statement to make the button fully functional - in this case linking to an external url?
0
 

Author Comment

by:cdr21
ID: 18774473

Thanks for all your help Vic!

I got the geturl statement below to work, placing it just above your code

this.onRelease = function() {
 getURL("javascript:openFEP('ktre')");
 };
0
 
LVL 5

Expert Comment

by:victmo
ID: 18777874
Yeap, thats correct, you can place your code there or on the object:

on(release){
  //your code
}

Glad it worked,

Vic
0

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