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Key strokes from mouse interaction in a GUI

[3 Replies]
- 06-Jul-2011 06:26 PM
- Forum: General Discussion
Is it possible to have your mouse hover over a box, and when it is in said box a key is pressed/held? When you remove your cursor from the box, the key is released.

ie.

1. move mouse to be over top of box, the key 'a' is pressed (you could see it in notepad or something)

3. retract mouse from box, key press stops

I've been mostly using the default libraries for my project, but the toxic lib one is nice as well. If any one has any suggestions that would be awesome!

NXT communication issues

[1 Reply]
- 08-Jun-2011 04:21 PM
- Forum: Integration and Hardware
Hello,

I am using the NXT comm processing library, but am having great difficulties connecting and using the library.

I am not sure how to actually use the libraries and have found some example programs. One I am using is this....

import pt.citar.diablu.processing.nxt.*;

PFont font;

int power = 50;

LegoNXT lego;

void setup() {

size(400, 400);

font = loadFont("ArialNarrow-24.vlw");

textFont(font);

lego = new LegoNXT(this, "COM18");

frameRate(10);

}

void draw() {

background(0);



textAlign(CENTER);

textMode(SCREEN);





int batteryLevel = lego.getBatteryLevel();



// draw battery level;

fill(255);

rect(170, height, 60, -batteryLevel/90);

text("Battery: " + batteryLevel + " mv", 140, height-batteryLevel/90);

}

But when I run it I get an error saying

Exception in thread "Animation Thread" java.lang.NoClassDefFoundError: gnu/io/UnsupportedCommOperationException

at NXTCommBatteryTest.setup(NXTCommBatteryTest.java:66)

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

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

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

Caused by: java.lang.ClassNotFoundException: gnu.io.UnsupportedCommOperationException

at java.net.URLClassLoader$1.run(URLClassLoader.java:202)

at java.security.AccessController.doPrivileged(Native Method)

at java.net.URLClassLoader.findClass(URLClassLoader.java:190)

at java.lang.ClassLoader.loadClass(ClassLoader.java:307)

at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)

at java.lang.ClassLoader.loadClass(ClassLoader.java:248)

... 4 more

So how do I connect to the nxt via usb and know that it is working properly?

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