[Closed] dotNetObject and event handler inside ca

Feb 19, 2009 3:54 pm

I’ve run into this weird issue with a script I’m working on where using dotNet.addEventHandler doesn’t do anything when invoked from inside a ca’s event.

Below is a simplified script to illustrate what I’m trying to accomplish. In the original script the on TestParam set val actually calls a function that creates a dotNetObject (unless it already exists) and attaches several event handlers. However, to find out what was going wrong I wrote this simple test script:

fn Tmr_Tick =
(
  print "Tick!"
  Tmr.Stop()
)

TestCa = attributes "TestCa"
(
  parameters params
  (
    TestParam type:#integer
    on TestParam set val do
    (
      Tmr = dotNetObject "System.Windows.Forms.Timer"
      dotNet.addEventHandler Tmr "Tick" Tmr_Tick
      Tmr.Interval = 100
      Tmr.Start()
    )
  )
)

TestObj = box()
custAttributes.add TestObj TestCa

After running the above script, enter line by line in the listener:

Tmr
undefined
TestObj.TestParam = 1
1
[i]no "Tick" ?[/i]
Tmr
dotNetObject:System.Windows.Forms.Timer
Tmr.Enabled
true

So at this point the timer is created and is running, but the Tmr_Tick function is never called.
Adding the event manually in the listener after this:

dotNet.addEventHandler Tmr "Tick" Tmr_Tick
OK
"Tick!"

Any ideas would be very much appreciated!

Thanks,
Martijn

4 Replies

ZeBoxx2

Feb 19, 2009 3:54 pm

no idea – seems like a bug ( your post pretty much has the exact findings in this earlier thread: http://forums.cgsociety.org/showthread.php?t=728464 )

LoneRobot

Feb 19, 2009 3:54 pm

hi Martijn,

Looks like the same issue as me – i think it has something to do with the eventhandler being added in global scope, otherwise it doesnt register.

In my case i was using the flowlayoutpanel – when dynamically adding controls, they wouldnt register. I got around this by building a custom control that registered these within the class library. This way, it worked within the Ca def in the command panel, but had the downside of needing a loaded assembly.

I’ve logged this with autodesk.

magicm

Feb 19, 2009 3:54 pm

Thanks for the replies guys Hadn’t noticed that thread ( search button? where? )

Cheers,
Martijn

Kameleon

Feb 19, 2009 3:54 pm

I had the same problem once when adding event handlers to picture boxes I solved it by having a global array with all the picboxes and then adding the eventhandlers in a global scope also… In your case it should be something like this:

mTimer=#(dotNetObject "System.Windows.Forms.Timer")
fn Tmr_Tick sender args =
(
  print "Tick!"
  sender.Stop()
)

TestCa = attributes "TestCa"
(
  parameters params
  (
    TestParam type:#integer
    on TestParam set val do
    (   
      mTimer[1].Interval = 100
      mTimer[1].Start()
    )
  )
)
dotNet.addEventHandler mTimer[1] "Tick" Tmr_Tick
TestObj = box()
custAttributes.add TestObj TestCa

Hope it helps, cheers!