Description

Alicevision related PR

Add a standard way to validate the attribute value.
It add a way to apply validators to an attribute description and to represent in the UI when these attributes are not valid.

Validators

classAttributeValidator(object):def__call__(self,node:"Node",attribute:"Attribute")->tuple[bool,list[str]]:raiseNotImplementedError()classNotEmptyValidator(AttributeValidator):def__call__(self,node:"Node",attribute:"Attribute")->tuple[bool,list[str]]:ifattribute.valueisNoneorattribute.value=="":returnerror("Empty value are not allowed")returnsuccess()

Validators usage (can be a lambda)

desc.StringParam(name="input",label="Test input",description="",value="",validators=[NotEmptyValidator(),lambdanode,attribute:success()ifattribute=="test"elseerror("Attribute value should be 'test'")                ]        ),

Features list

• Add the notion of reusable validators
• Validator embed the error messages
• Validator can be a lambda
• An icon with error message appear when an attribute value is invalid (at least one validator return error messages)
• A node containing an invalid attribute is tagged with an orange icon and the selection rectangle is orange
• Attribute value is checked every time the attribute value is set (in the Command)
• A Warning Dialog is displayed before trying to submit a graph where a node is in warning state