MATLAB Object-Oriented Programming

end

end

getPropertyGroups Override

MATLAB calls getPropertyGroups when displaying scalar or nonscalar objects.

However, MATLAB does not call this method when displaying a scalar handle to a deleted

object.

The EmployeeInfo class overrides this method to implement the property groups for

scalar object display.

This implementation calls the superclass getPropertyGroups method if the input is not

scalar. If the input is scalar, this method:

• Defines two titles for the two groups


• Creates a cell array of property names that are included in the first group. MATLAB
  adds the property values for the display


• Creates a struct array of property names with associated property values for the
  second group. Using a struct instead of a cell array enables you to replace the values
  that are displayed for the Salary and Password properties without changing the
  personal information stored in the object properties.


• Constructs two matlab.mixin.util.PropertyGroup objects, which are used by
  the displayScalarObject method.

Here is the EmployeeInfo override of the getPropertyGroups method. The required

protected access is inherited from the superclass.

methods (Access = protected)

function propgrp = getPropertyGroups(obj)

if ~isscalar(obj)

propgrp = [email protected](obj);

else

gTitle1 = 'Public Info';

gTitle2 = 'Personal Info';

propList1 = {'Name','JobTitle'};

pd(1:length(obj.Password)) = '*';

level = round(obj.Salary/100);

propList2 = struct('Salary',...

['Level: ',num2str(level)],...

'Password',pd);

propgrp(1) = matlab.mixin.util.PropertyGroup(propList1,gTitle1);

propgrp(2) = matlab.mixin.util.PropertyGroup(propList2,gTitle2);

end

end

end

18 Customizing Object Display