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Index › Programming Questions & Help › Syntax Questions › keyPressed problem pressing same key again
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keyPressed problem pressing same key again (Read 369 times)
le_wuus
keyPressed problem pressing same key again
May 2nd, 2008, 7:58pm  
Thanks for helping me with the following.
I´ll bet that everyone (exept me) is able to solve this one...
If I press the Y key the program shall print 1 to the console.
If I press it again it shall print 2. (then 1 , then 2 and so on)
I added a boolean to controll the state of the key (if it has been pressed already or not).
But with my code the programm prints 1 2 just by pressing y one time.

here´s the code:


boolean Ypressed=false;

void setup (){
 size (100,100);
}


void draw (){

 if (Ypressed == false){    
   if  (keyPressed) {
     if (key == 'y' || key == 'Y'){


       Ypressed = true ;
       println("1");
     }  
   }
 }

 if (Ypressed == true){
   if  (keyPressed) {
     if (key == 'y' || key == 'Y'){


       Ypressed = false;
       println("2");

     }
   }
 }
 println(Ypressed);
}



Thank you for helping me.
le_wuus
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JohnG
Re: keyPressed problem pressing same key again
Reply #1 - May 2nd, 2008, 9:32pm  
The problem is that you set Ypressed to true, then immediately after it check if it's true, and then set it to false. You need to add "else" in there:

Code:
 void draw (){
 
  if (Ypressed == false){	
    if  (keyPressed) {
	if (key == 'y' || key == 'Y'){
	  Ypressed = true ;
	  println("1");
	}  
    }
  }  
  else if (Ypressed == true){ //<-------
    if  (keyPressed) {
	if (key == 'y' || key == 'Y'){
	  Ypressed = false;
	  println("2");
	}
    }
  }  
  println(Ypressed);
}
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le_wuus
Re: keyPressed problem pressing same key again
Reply #2 - May 2nd, 2008, 11:33pm  
Thanks mate !
(I just love this community)
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