[Flashcoders] Question regarding use of Delegate in a class

2006-02-21 Thread Wouter Steidl 
 
Good evening people,

I asked this on the newbie list since I suspect it to be a newbie question,,
but didn't get an answerso I hope to find the answer here:

I have some code in a class that needs to fire a fuction (startTimer) from
an onEnterFrame eventi can fire it from an onrelease usung Delegate, but
not from the onEnterFrame..what am I missing here?

code

private function doFade():Void{
container_mc.onEnterFrame = function(){
this.fader_mc._alpha-=faderSpeed;
if(this.fader_mc._alpha = 0){
this.fader_mc._alpha=0;
Delegate.create(this, startTimer); -- DOESN'T WORK
delete this.onEnterFrame;
}
}
container_mc.onRelease = Delegate.create(this, startTimer); --
WORKS AND FIRES THE FUNCTION WHEN I CLICK THE MOVIECLIP } 

/code

Thx for your help,

Wout

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Re: [Flashcoders] Question regarding use of Delegate in a class

2006-02-21 Thread Ian Thomas 
Hi Wouter,

Delegate.create() doesn't _call_ a function, it just creates a Function
variable for later use. Which is like a reference to a function.

By calling:
container_mc.onRelease = Delegate.create(this, startTimer);

You're saying, in effect when onRelease is called, trigger the code in
startTimer.

By saying:
Delegate.create(this, startTimer);

in your doFade() function, you're just creating a function reference and not
storing the value anywhere - not doing anything with it.

What you actually want to do is to call the function, which you should be
able to do with:

this.startTimer();

or even

startTimer();

HTH,
  Ian

On 2/21/06, Wouter Steidl [EMAIL PROTECTED] wrote:


 Good evening people,

 I asked this on the newbie list since I suspect it to be a newbie
 question,,
 but didn't get an answerso I hope to find the answer here:

 I have some code in a class that needs to fire a fuction (startTimer) from
 an onEnterFrame eventi can fire it from an onrelease usung Delegate,
 but
 not from the onEnterFrame..what am I missing here?

 code

 private function doFade():Void{
 container_mc.onEnterFrame = function(){
 this.fader_mc._alpha-=faderSpeed;
 if(this.fader_mc._alpha = 0){
 this.fader_mc._alpha=0;
 Delegate.create(this, startTimer); -- DOESN'T
 WORK
 delete this.onEnterFrame;
 }
 }
 container_mc.onRelease = Delegate.create(this, startTimer); --
 WORKS AND FIRES THE FUNCTION WHEN I CLICK THE MOVIECLIP }

 /code

 Thx for your help,

 Wout

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 http://www.figleaf.com
 http://training.figleaf.com

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Re: [Flashcoders] Question regarding use of Delegate in a class

2006-02-21 Thread Ian Thomas 
Oops - would help if I read your code properly!

The first bit of my reply made sense - you're not _calling_ the function,
just creating a reference to it.

Calling this.startTimer() won't work because you're in an inner function.

startTimer() should do it.

Ian
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Re: [Flashcoders] Question regarding use of Delegate in a class

2006-02-21 Thread Nathan Derksen 
There is another way of doing it as well, FYI, that doesn't use the  
delegate class. You can take advantage of the fact that handler  
functions can see local variables and use a local variable to make  
reference to the class. The line:


var parent = this;
(or fully typed, var parent:MyClassName = this;)

allows you to store a reference to the class instance. You can then  
reference any method or property by just calling parent.methodName()  
or parent.propertyName from within your handler functions.



private function doFade():Void{
var parent = this;
container_mc.onEnterFrame = function(){
this.fader_mc._alpha-=faderSpeed;
if(this.fader_mc._alpha = 0){
this.fader_mc._alpha=0;
parent.startTimer();
delete this.onEnterFrame;
}
}

container_mc.onRelease = function()
{
parent.startTimer();
}
}

Nathan
http://www.nathanderksen.com


On Feb 21, 2006, at 9:40 AM, Wouter Steidl wrote:


private function doFade():Void{
container_mc.onEnterFrame = function(){
this.fader_mc._alpha-=faderSpeed;
if(this.fader_mc._alpha = 0){
this.fader_mc._alpha=0;
Delegate.create(this, startTimer); -- DOESN'T WORK
delete this.onEnterFrame;
}
}
container_mc.onRelease = Delegate.create(this, startTimer); --


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