edit 'hide when' in 'edit paraemter interface' using python

[Lucavfx 2]

Hi,

I'd like  to access the 'Hide When' parameter field in 'Edit Parameter Interface' via python. The idea is to access this field and store a string such as "{ showmoreinfo == 1 }". Is there a way to easily do this?

I searched and found workarounds which involve calling the hide method i.e. hou.parm('/out/mantra1/vm_lightexport_scope21').hide(1) but this result in an inefficient system requiring hoops to achieve what I want.

Any ideas?

Thanks

Luca

 

[graham 148]

Disable/Hide When is handled through a parameters ParmTemplate conditionals dict.

Consider this example of a button that is disabled/hidden when a toggle ('parm') is not checked:

>>> pt=hou.parm('/obj/geo1/null1/parm2').parmTemplate()
>>> pt
<hou.ButtonParmTemplate name='parm2' label='Label'>
>>> pt.conditionals()
{parmCondType.DisableWhen: '{ parm == 0 }', parmCondType.HideWhen: '{ parm == 0 }'}
>>> pt.setConditional(hou.parmCondType.DisableWhen, "{ parm == 1 }")
>>> pt.setConditional(hou.parmCondType.HideWhen, "{ parm == 1 }")
>>> pt.conditionals()
{parmCondType.DisableWhen: '{ parm == 1 }', parmCondType.HideWhen: '{ parm == 1 }'}
>>> n.replaceSpareParmTuple(pt.name(), pt)

 

[Lucavfx 2]

23 minutes ago, graham said:

Disable/Hide When is handled through a parameters ParmTemplate conditionals dict.

Consider this example of a button that is disabled/hidden when a toggle ('parm') is not checked:

>>> pt=hou.parm('/obj/geo1/null1/parm2').parmTemplate()
>>> pt
<hou.ButtonParmTemplate name='parm2' label='Label'>
>>> pt.conditionals()
{parmCondType.DisableWhen: '{ parm == 0 }', parmCondType.HideWhen: '{ parm == 0 }'}
>>> pt.setConditional(hou.parmCondType.DisableWhen, "{ parm == 1 }")
>>> pt.setConditional(hou.parmCondType.HideWhen, "{ parm == 1 }")
>>> pt.conditionals()
{parmCondType.DisableWhen: '{ parm == 1 }', parmCondType.HideWhen: '{ parm == 1 }'}
>>> n.replaceSpareParmTuple(pt.name(), pt)

 

 

Thanks, I'm getting closer now. The problem is that as in the case of image plane parameters they're specified as vm_channel_plane# however python param and parmTemplate calls expect parameter names to be explicit (i.e. vm_channel_plane23). Setting the conditionals dict to explicit parameters does not seem to apply in this case

[graham 148]

In the case of something like that (and if say modifying more than one parameter, or the ones on digital assets) you'll want to use the hou.ParmTemplateGroup from the node like as follows:

>>> hou.parm('/out/mantra1/vm_variable_plane1').description()
'VEX Variable'
>>> ptg = hou.node('/out/mantra1').parmTemplateGroup()
>>> ptg.find("vm_variable_plane#")
<hou.StringParmTemplate name='vm_variable_plane#' label='VEX Variable' length=1 naming_sch
>>> pt = ptg.find("vm_variable_plane#")
>>> pt.setLabel("This is a test")
>>> ptg.replace(pt.name(), pt)
>>> hou.node('/out/mantra1').setParmTemplateGroup(ptg)
>>> hou.parm('/out/mantra1/vm_variable_plane1').description()
'This is a test'

 

[Lucavfx 2]

On 1/27/2017 at 5:51 PM, graham said:

In the case of something like that (and if say modifying more than one parameter, or the ones on digital assets) you'll want to use the hou.ParmTemplateGroup from the node like as follows:

>>> hou.parm('/out/mantra1/vm_variable_plane1').description()
'VEX Variable'
>>> ptg = hou.node('/out/mantra1').parmTemplateGroup()
>>> ptg.find("vm_variable_plane#")
<hou.StringParmTemplate name='vm_variable_plane#' label='VEX Variable' length=1 naming_sch
>>> pt = ptg.find("vm_variable_plane#")
>>> pt.setLabel("This is a test")
>>> ptg.replace(pt.name(), pt)
>>> hou.node('/out/mantra1').setParmTemplateGroup(ptg)
>>> hou.parm('/out/mantra1/vm_variable_plane1').description()
'This is a test'

 

Thanks Graham that helped quite a bit