Customizing Properties for Rules

The rules mechanism is very flexible and allow developers to customize which properties from the widgets are exposed.

By default, PyDMPrimitiveWidget (base class for all the PyDM Widgets) defines two constants:


    'Enable': ['setEnabled', bool],
    'Visible': ['setVisible', bool],

    Defines the default property to be selected from the list when creating a new rule using the Rules Editor.


    This constant holds a dictionary in which the key element is the “user-friendly” name of the property and the value is a list in which the first element is the property name as a String and the second is the expected data type.

You can customize those constants at your widget and that will reflect on what users are able to tweak and use when creating new rules.