Python viewer states geometry collisions, Multiple for-each loops, Multiple curves. Houdini tutorial

For the intro on viewer states chack out the playlist:

0:00 end result
01:03 creating embedded hda
1:46 first loop setup
02:33 creating a point
03:35 adding parameters
04:53 creating channel references for each loop
07:58 referencing attributes in a parameters
09:04 creating a curve from created points
11:21 creating the second for-each loop
11:50 adding new parameters for HDA
12:42 creating new parameter references
18:02 python state setup
18:41 getting instance attributes for point and curve count parms
21:21 editing start method
23:18 editing onMouseEvent method
27:11 setting un onKeyEvent method
30:33 assigning default value for the number of curves
32:21 setting up collision geo toggle
34:35 editing python code for collision
40.28 that's it!

[FaddyVFX]

Nice, i was searching for examples about it to learn new methods. Thanx

[bekabaratashvili]

Hey, I am learning so much from you, Thanks!
Now i am stack and need a help. I want to use z key with scroll mouse wheel to act something, but they are only available in deferent events.
I think i have to use return True to consume the event, but how can i use it?
if you know please help!