simple textWidth() question... I figured it out.

Programming Questions

v.k.

simple textWidth() question... I figured it out.

in Programming Questions • 2 years ago

Why i am getting a "null point exception" as soon as a hit any key with the following code? I isolated this so it easy to understand.

void draw(){}

void keyPressed()

{

char in;

in = (char)key;

println(in); // till here is ok

println(textWidth(in)); // this cause a nuul pointer... if u comment out every thing works

}

thanks for any help

Replies(3)

fdevant

Re: simple textWidth() question...

2 years ago

void setup(){}
void draw (){}
void keyPressed(){
if(keyPressed){
println(key);
}
}

Maybe you should check if a key was pressed in the event?
-
http://draconiansolo.wordpress.com/

v.k.

Re: Re: simple textWidth() question...

2 years ago

Nope. U see the problem is with textWidth() call, and not with printing the key itself. If u do not use the line with textWidth90 in my code it will run also. I tried iserting textWidth() in your code and it gives me the same "null pointer exception". As this:

void setup(){}
void draw (){}
void keyPressed(){
if(keyPressed){
println(key);
println(textWidth(key)); //line i inserted
}
}

v.k.

Re: simple textWidth() question... I got it!

2 years ago

Oops... I figured it out. There was no font loaded. That's the null pointer. Once the font is loaded, everything works ok. No font, can't measure width... so this works, as long as you have the font in data folder:

PFont f;

void setup() {
f =loadFont("Futura-Medium-32.vlw");
textFont(f,32);
}
void draw () {
}
void keyPressed()
{
char in;
in = (char)key;
println(in);
println(textWidth(in));
}

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