ToolValidator enabled property defaults

MErikReedAugusta — Thu, 28 Dec 2023 23:33:43 GMT

Okay, I feel like I'm going crazy, here.

I'm trying to build a Script Tool where a Boolean checkbox input controls another parameter that accepts a Feature Class, which I remember being fairly simple in ArcMap 10.7.

I can get the tool to successfully turn the Feature Class inputs on and off after the tool is running, but I can't get them to start disabled.

Parameters 0 & 1 are the two Booleans in question.
Parameters 3 & 4 are the respective Feature Classes.

def initializeParameters(self): # Customize parameter properties. # This gets called when the tool is opened. self.params[3].enabled = False self.params[4].enabled = False return

I thought the above would be all I need to get these two parameters to start as disabled, but the tool doesn't seem to acknowledge the command.

I can confirm initializeParameters is running when the tool opens, because I threw a test dummy in there* and it worked. (*I wrote placeholder text into the value of one of the parameters, and it successfully shows up when you open the tool)

The only place I can seem to get the tool to recognize the .enabled property right out of the gate is if I put it in __init__. But then it fails to update properly from updateParameters, because __init__ seems to be overriding whatever I put in updateParameters.

I managed to figure out the below workaround, but I'm trying to figure out why I couldn't just put "self.params[3].enabled = False" into initializeParameters to set the default state and be done with it.

class ToolValidator: # Class to add custom behavior and properties to the tool and tool parameters. def __init__(self): # set self.params for use in other function self.params = arcpy.GetParameterInfo() # Since 0 and 1 default to False, this works for initial state. It also avoids overriding later, because the checkbox IS the desired state. self.params[3].enabled = self.params[0].value self.params[4].enabled = self.params[1].value def initializeParameters(self): # Customize parameter properties. # This gets called when the tool is opened. return def updateParameters(self): # Modify parameter values and properties. # This gets called each time a parameter is modified, before # standard validation. if self.params[0].altered: self.params[3].enabled = self.params[0].value if self.params[1].altered: self.params[4].enabled = self.params[1].value return def updateMessages(self): # Customize messages for the parameters. # This gets called after standard validation. return

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ToolValidator enabled property defaults