Problems modifying teleop_base_keyboard.

edit

Hey there, I wanted to try out a code that sends Twist/cmd_vel parameters over a topic. Therefore, I tried simplifying the code for teleop_base_keyboard (available here) with this code.

When I run it, instead of just taking in my keystrokes and not displaying them on screen, it does and I have to push enter to see the printf on what's being sent (right after the chatter_pub.publish(cmdvel); line). And even then, the values never change. I get the feeling it's never entering in any cases apart from the default one. What's displayed is:

Reading from keyboard
---------------------------
w/x : increase/decrease max linear speed by 10%
e/c : increase/decrease max angular speed by 10%
---------------------------
anything else : stop
---------------------------
wwww
The speed information sent is: 
 Linear speed x 0.000000  
  Angular speed z 0.000000  
w
 The speed information sent is: 
 Linear speed x 0.000000  
  Angular speed z 0.000000  
 The speed information sent is: 
 Linear speed x 0.000000  
  Angular speed z 0.000000

Any input on what I'm doing wrong?

Thanks :)!