Setting an enumerate property.

[keithsloan52]

Okay I have a Object with an enumerate property

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obj.addProperty("App::PropertyEnumeration","aunit","GDMLTube","aunit")
obj.aunit=['rad','deg']
obj.aunit=0

Which iniitalises the property to 'rad'.

Don't understand the double setting of obj.aunit, but went by something I found on the web and it seems to work,

But I would like to now set the value with some code. How can I do that?

[vocx]

Okay I have a Object with an enumerate property
...

But I would like to now set the value with some code. How can I do that?

What exactly is an enumeration? Like a list of strings? Then it's not a value. If you want to enter a value, you need to add a numeric property.

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obj.addProperty("App::PropertyVectorDistance", "Start", "Draft", QT_TRANSLATE_NOOP("App::Property", "The start point of this line"))
obj.addProperty("App::PropertyLength", "FilletRadius", "Draft", QT_TRANSLATE_NOOP("App::Property", "Radius to use to fillet the corners"))

For example.

[keithsloan52]

Okay I have a Object with an enumerate property
...

But I would like to now set the value with some code. How can I do that?

What exactly is an enumeration? Like a list of strings? Then it's not a value. If you want to enter a value, you need to add a numeric property.

Code: Select all

obj.addProperty("App::PropertyVectorDistance", "Start", "Draft", QT_TRANSLATE_NOOP("App::Property", "The start point of this line"))
obj.addProperty("App::PropertyLength", "FilletRadius", "Draft", QT_TRANSLATE_NOOP("App::Property", "Radius to use to fillet the corners"))

For example.

enumerate property is one from a list of values
By set a value I mean I want to set it to 'deg' where the default is 'rad' i.e. aunit=1

[keithsloan52]

Okay my class definition for a python object is

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class GDMLTube(GDMLcommon) :
   def __init__(self, obj, rmin, rmax, z, startphi, deltaphi, aunit,  \
                lunit, material):
      '''Add some custom properties to our Tube feature'''
      obj.addProperty("App::PropertyLength","rmin","GDMLTube","Inside Radius").rmin=rmin
      obj.addProperty("App::PropertyLength","rmax","GDMLTube","Outside Radius").rmax=rmax
      obj.addProperty("App::PropertyLength","z","GDMLTube","Length z").z=z
      obj.addProperty("App::PropertyFloat","startphi","GDMLTube","Start Angle").startphi=startphi
      obj.addProperty("App::PropertyFloat","deltaphi","GDMLTube","Delta Angle").deltaphi=deltaphi
      obj.addProperty("App::PropertyEnumeration","aunit","GDMLTube","aunit")
      obj.aunit=['rad','deg']
      obj.aunit=0
      obj.addProperty("App::PropertyString","lunit","GDMLTube","lunit").lunit=lunit

which as it stands defaults the object aunit property to rad.

What I would like to do is set the value based on the value of aunit passed to its __init__
function

[TheMarkster]

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obj.aunit = ['rad','deg'].index(aunit)

[keithsloan52]

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obj.aunit = ['rad','deg'].index(aunit)

Thanks, found I actually had to code

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obj.aunit=['rad','deg']
obj.aunit=['rad','deg'].index(aunit)

Still a mystery to me as to why it requires a double reference

[Chris_G]

Still a mystery to me as to why it requires a double reference

I suppose that this property gets a special treatment internally :
- when it is set to a list of strings, the enum gets populated
- when it is set to an integer, the index in the EXISTING enum is set

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['rad','deg'].index(aunit) # This is an integer.

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obj.aunit = ['rad','deg'].index(aunit)

So this sets an index, but the enum list has not been populated first.
This would explain the need for :

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obj.aunit=['rad','deg'] # Populate the enum list
obj.aunit=['rad','deg'].index(aunit) # Set the index in the (not empty) list

[keithsloan52]

Still a mystery to me as to why it requires a double reference

I suppose that this property gets a special treatment internally :
- when it is set to a list of strings, the enum gets populated
- when it is set to an integer, the index in the EXISTING enum is set

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['rad','deg'].index(aunit) # This is an integer.

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obj.aunit = ['rad','deg'].index(aunit)

So this sets an index, but the enum list has not been populated first.
This would explain the need for :

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obj.aunit=['rad','deg'] # Populate the enum list
obj.aunit=['rad','deg'].index(aunit) # Set the index in the (not empty) list

You would have thought it easier to pass it a list and a number as a single list.
obj.aunit = [['rad','deg],num]