[SOLVED] getParameterPtr is not nullptr when access id that not exist

[qwert_e]

from docs:

Quote

 

Ptr<PropertyParameter> getParameterPtr( int id ) Returns a property parameter by its ID. Arguments int id - Property parameter ID. Return value Property parameter smart pointer, if it exists; otherwise, nullptr.

 

As getNumParameters function deprecated, and i want to iterate through all parameters of my property, i go as: for (int i = 0; property->getParameterPtr(i); i++) { when i reaches 15 if logs into console:  Property::getParameterPtr(): can't get parameter with id 15 in property "xxx_xxx" and it is not nullptr, as it said in docs. How can i handle that?   UPD: found way to get count of parameters through getNumChildren() at root parameter, but question about nullptr still actual.

Edited January 11, 2019 by qwert_e

[alexander]

Hi qwert_e,

Yes, there is a mistake. getParameterPtr() never returns nullptr. It always returns a PropertyParameter object, but the isExist() method may return 0.
And, you can't iterate through all of your parameters by one loop. Only through recursive function:

PropertyParameterPtr root_parameter = property->getParameterPtr();
std::function<void(const PropertyParameterPtr &)> recursive_func = [&, this](const PropertyParameterPtr &p)
{
	for (int i = 0; i < p->getNumChildren(); i++)
	{
		PropertyParameterPtr child = p->getChild(i);
		
		// do something...
		
		recursive_func(child);
	}
};
recursive_func(root_parameter);

Best regards,
Alexander

[Amerio.Stephane]

I think this code sample should definitively be in the doc :)

[fox]

Hi Amerio,

The mistake will be fixed and code samples will be added shortly. We're sorry for the inconvenience caused!

Thank you!