Processing keypress (not presseD)

Programming Questions

Sergio Pa..

Processing keypress (not presseD)

in Programming Questions • 1 year ago

I want to know if Processing can press a key on windows, the user is gonna use a kinect-like sensor to interact with some basic functions, we need to send key presses though. After some research, I found this "Robot" class, which seems to do exactly what I want, but maybe it's Arduino only?

I import the class with "import java.awt.Robot;", but on the line "r.keyPress(CAPS_LOCK);" I get this error:

Exception in thread "Animation Thread" java.lang.NullPointerException

at KeyPress.draw(KeyPress.java:40)

at processing.core.PApplet.handleDraw(Unknown Source)

at processing.core.PApplet.run(Unknown Source)

at java.lang.Thread.run(Thread.java:662)

Win7 64 bits, Java 32 bits, default Processing install (only unzipped and ran), only extra library is SimpleOpenNI.

Replies(3)

asimes

Re: Processing keypress (not presseD)

1 year ago

Maybe this helps? http://processing.org/reference/keyPressed_.html

An example:

Copy code

void setup() {
size(100, 100);
}
void draw() {
}
void keyPressed() {
if (key == 'a') println("a");
}

PhiLho

Re: Processing keypress (not presseD)

1 year ago

" on the line "r.keyPress(CAPS_LOCK);" I get this error:"
See Why do I get a NullPointerException?
If you give a line in isolation, it is hard to tell what error you did.
Beside, how CAPS_LOCK is defined?

Sergio Pa..

Re: Processing keypress (not presseD)

1 year ago

My bad guys, shouldn't try these stuff so late at night. I had forgotten to instantiate my "r"/Robot var on the setup method.

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