pressing a button with python.

[Symbolic]

Hi,

I am trying to trigger a button of an OTL with a small python script.

target=hou.pwd();

target.parm("parm").pressButton();

When I run this in the python editor... it just kills houdini.

If I put that script on a script SOP... it klicks the button, I get my result... and then in crashes.

Any ideas? Thanks.

[graham]

What exactly is your button doing? Can you post an example? I use it all the time and have no problems.

[Symbolic]

What exactly is your button doing? Can you post an example? I use it all the time and have no problems.

Well,

The button is on an imaginary OTL right now.

The script on the OTL is:

def runMe():
	self = hou.pwd()
	hou.ui.displayMessage("Hit me! " + str(self))  

def execute():
  runMe()

The button it self has this script:

hou.pwd().hdaModule().runMe()

Then when you click the button, you get the message.

When you try to triger it with the python script... things go terribly wrong.

?!

Edited July 6, 2009 by Symbolic

[static]

Seems to be a bug, I tried something similar just now and it seems to just hang when it reaches the displayMessage... only when you run the callback from the .pressButton() though...

[Symbolic]

I am sure it was working the other day!?

[graham]

I can definitely reproduce and will submit a bug. I have an idea why it's hanging. I'll ask around.

Edit:

Bug submitted: 36185

Running the following line from the shell in the attached file causes the problem.

hou.node("/obj/gthompson_geo11").parm("parm").pressButton()

button_crash.hip

Edited July 6, 2009 by graham

[graham]

I am sure it was working the other day!?

I tested it in 3 different versions of H (9.5, 10.0, 10.x) and it was the same in all of them

[Symbolic]

Hah! So it is a bug?!

Any solutions?... ideas?... I just have lots of OTLs and selecting all of them -> pressing that button... does not work. I need to have a small script going through a list of those OTLs and trigering that button

Simple.

Edited July 6, 2009 by Symbolic

[graham]

I'm pretty sure the problem is caused by the fact you are attempting to display the message window. If you remove that line and say print or something else it's fine. It looks like a thread locking problem between the shell and the UI your callback is trying to display.

A quick way around that right now would be to do something like this for each asset.

cwd = hou.pwd()
hou.setPwd(my_node)
my_node.hdaModule().runMe()
hou.setPwd(cwd)

This avoids the callback and gets around the bug in my tests. If you had your runMe function defined differently you could get around not having to set the current directory but that's not really a big deal.

[Symbolic]

Thanks graham,

I do not need to display any messages. It was just to test the CLIKC process. Actually it seems like that test caused me troubles. It works for a simple "print" output. So it works. Cheers.