How can I change IntProperty default value?

Question

I've got 2 properties. My first:

hT = EnumProperty(items=(('A', "None", ""),
                         ('B',"LeMans 40", ""),
                         ('C',"LeMans 45", ""),
                         ('D',"LeMans 50", ""),
                         ('E',"LeMans 60", "")), 
                         default='C', name="Hardeware type")

My second:

 fW = IntProperty(name="Width", 
             default=838, min=800, max=2700, description="Furniture width")

My first property is for choosing the hardware of my furniture. Each hardware needs a minimum dimension of its furniture. So, for example, if I choose "LeMans 60", the "default" and "min" value of my second property need to change to 998.

Is it possible to do that or do I need to create a property with its own default, min and max value ?

Answer 1

You can't do that to an actual instance:

import bpy
bpy.types.Object.prop = bpy.props.IntProperty()

bpy.context.active_object.prop
# this evaluates what the value is and returns <class 'int'> - not subscriptable

To adjust the min max etc. you need to re-declare it:

bpy.types.Object.prop = bpy.props.IntProperty(min=100, max=300)
# note: re-declaring will change it for all the objects

Changing the default value will not change the actual value of that static property - you will need to assign it a new value in that case. But newly created objects will have this new default.

You can make it work like this:

1. create callback function for your hT property
2. have this function re-declare your fW property with new parameters based on hT value