Generic Number of Properties

[Kivy User]

Hey,
my goal is to observe a generic number of properties generated at runtime.
So the manager class will get a number of x nodes and I want my UI and other interfaces (Midi) to observe some of them, since properties have to be declared at class level I'm kind of struggling how to solve this elegant.

The options in Kivy I found so far to solve this problem are:

• using a DictProperty and add entries at runtime, works but ugly since add every update I have to check the complete Dic if the change is relevant for the specific class
  
• I tried playing with "apply_property" but didnt get that to work with a generic name
  

So my question is, if there are any other options I'm overseeing currently.

thanks in advance
A happy user

[Elliot Garbus]

Properties are declared at the class level, but the are instance properties.

 

Each property will have it’s own event that will fire when the property changes.  If I declare a kivy property called my_prop, if there is a change in self.myprop, it will call self.on_myprop().

 

https://kivy.org/doc/stable/api-kivy.properties.html?highlight=properties#observe-property-changes

 

Alternatively you would walk the widget tree,

https://kivy.org/doc/stable/api-kivy.uix.widget.html?highlight=widget#kivy.uix.widget.Widget.walk

and use hasattr() on the appropriate widget types (type()).

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[Kivy User]

Maybe my question wasnt clear enough. I want a generic number of properties, but only at runtime the number / names will be given from the backend. This collides with the problem that I have to declare them at class level.
Cant declare them If I dont know the number, names, attributes ... ;)

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[Elliot Garbus]

Could you create class instances of a class that contains a property?

The property would have the same name, but the class would have a unique name.

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