MATLAB Object-Oriented Programming

Customize Display for Heterogeneous Arrays

You can call only sealed methods on nonscalar heterogeneous arrays. If you want to

customize classes that are part of a heterogeneous hierarchy, you must override and

declare as Sealed all the methods that are part of the CustomDisplay interface.

The versions of disp and display that are inherited from

matlab.mixin.CustomDisplay are sealed. However, these methods call all of the part

builder (“Part Builder Methods” on page 18-4) and state handler methods (“State Handler

Methods” on page 18-5).

To use the CustomDisplay interface, the root class of the heterogeneous hierarchy can

declare these methods as Sealed and Access = protected.

If you do not need to override a particular method, then call the superclass method, as

shown in the following code.

For example, the following code shows modifications to the getPropertyGroups and

displayScalarObject methods, while using the superclass implementation of all

others.

classdef RootClass < matlab.mixin.CustomDisplay & matlab.mixin.Heterogeneous

%...

methods (Sealed, Access = protected)

function header = getHeader(obj)

header = [email protected](obj);

end

function groups = getPropertyGroups(obj)

% Override of this method

% ...

end

function footer = getFooter(obj)

footer = [email protected](obj);

end

function displayNonScalarObject(obj)

[email protected](obj);

end

function displayScalarObject(obj)

% Override of this method

% ...

end

function displayEmptyObject(obj)

[email protected](obj);

end

18 Customizing Object Display