Processing 1.0 - Processing Discourse - Adding a function to a class

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Index › Programming Questions & Help › Programs › Adding a function to a class

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Adding a function to a class (Read 408 times)

Manic

Adding a function to a class
Mar 6^th, 2008, 8:55pm

I was wondering if it's possible to do the following:

I want to have an class, say just a button or something, that will have a method within it like "onClick", is it possible to set it up in a way that I could create an instance of the class, and do something like;

Code:


//terrible pseudo code//

myClass inst1 = new myClass();
myClass inst2 = new myClass();
inst1.onClick = myFunction();
inst2.onClick = myOtherFunction();

myFunction(){
do stuff
}
myOtherFunction(){
do other things
}

So that when ever the onClick function was fired for that particular instance, it would use the assigned function?

Is this a job for broadcasters and listeners? If so how do you go about doing that? does anyone know of anywhere that will explain it well?

Do I make any sense?

Thanks
Martin

eskimoblood Senior Member Offline Posts: 341	Re: Adding a function to a class Reply #1 - Mar 6^th, 2008, 10:46pm Hi, this isn't the way that processing work. Only the main PApplet can check for mouse events. So you need the mousePressed() methode to inform your class of the event. Take a look at this example from the learning section: http://processing.org/learning/topics/buttons.html
	Andreas Köberle {eskimoblood}

Manic Full Member Offline Posts: 123	Re: Adding a function to a class Reply #2 - Mar 8^th, 2008, 10:57am Thanks, not quite what I was looking for, but I'm not sure how to explain it better for the time being. I'll probably post again when I know what I'm trying to say better. Cheers Martin

fjen

Re: Adding a function to a class
Reply #3 - Mar 8^th, 2008, 12:48pm

Code:


class MyClass
{
  void onClick () {
  // nothing here by default
  }
}

class MyOtherClass
extends MyClass
{
   void onClick () {
	 println("MyOtherClass");
   }
}

class YetAnotherClass
extends MyClass
{
   void onClick () {
     println("YetAnotherClass");
   }
}

MyClass a,b,c;

void setup ()
{
 a = new MyClass();
 b = new MyOtherClass();
 c = new YetAnotherClass();
}

void draw ()
{
a.onClick();
b.onClick();
c.onClick();
noLoop();
}

.. or have a look at interfaces.
F

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