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Index › Programming Questions & Help › Syntax Questions › keyPressed function
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keyPressed function (Read 994 times)
tzuching
keyPressed function
Jan 20th, 2010, 6:53pm  
Hi everyone,

let me just apologize beforehand that I am completely new to processing and programming, so I don't have the slightest clue as to how to work this thing...The assignment for my art class is to compose a simple "stream of consciousness." The idea is that a word appears on the initial screen, and when a key is pressed it moves on to the next word associated with it. I have the list of words I want to use, but have no idea how to integrate it into the keyPressed function. Help anyone??
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Cedric
Re: keyPressed function
Reply #1 - Jan 20th, 2010, 9:57pm  
all you need is an array of strings and a counting variable that is counted up

so our programm would look like this


Code:
String[] textArray = new String[]{ "Text a", "Text b", "Text c" };
PFont font;
int count;

void setup() {
  size(200,200);
  
font = createFont("Arial",14);
  textFont(font);
}

void draw() {
  background(255);
fill(0);
  text(textArray[count],80,100);

}

void keyPressed(){
count++;
if(count==textArray.length)count=0;
}



you could use modulo instead of "if" but this is probably easier to understand...
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tzuching
Re: keyPressed function
Reply #2 - Jan 20th, 2010, 10:29pm  
Thank you, Cedric!!
That worked perfectly!

Just one more question...if I want each word to appear a little lower than the other one, where would I enter the coordinates for each one?
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Cedric
Re: keyPressed function
Reply #3 - Jan 20th, 2010, 10:30pm  
what do you think Smiley ?
we have a variable that counts up, this could be used move thetext to a nother coordinate. look at http://processing.org/reference/text_.html to find out how to use it. the example makes it pretty clear i guess.
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tzuching
Re: keyPressed function
Reply #4 - Jan 20th, 2010, 10:40pm  
I'm not sure what the "s" in "String s" mean Shocked
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tzuching
Re: keyPressed function
Reply #5 - Jan 20th, 2010, 10:41pm  
can you also explain to me what this line means?

if(count==textArray.length)count=0;
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PhiLho 
Re: keyPressed function
Reply #6 - Jan 20th, 2010, 11:04pm  
You should take a look at the Learning section...
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Cedric
Re: keyPressed function
Reply #7 - Jan 20th, 2010, 11:08pm  
PhilHo is right, you should get used to the syntax and learn how to use the different commands. everything is explained in the reference, also what "s" is in this case.
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tzuching
Re: keyPressed function
Reply #8 - Jan 21st, 2010, 12:58pm  
alright. I'll do my best. Thanks!
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