MATLAB Object-Oriented Programming

3. Employee:
   Name: 'Nancy Green'
   Department: 'Documentation'

Deleted object handles in the array indicate their state:

1x3 EmployeeInfo members:

1. Employee:
   Name: 'Bill Tork'
   Department: 'Product Development'


2. handle to deleted EmployeeInfo


3. Employee:
   Name: 'Nancy Green'
   Department: 'Documentation'

To achieve the desired result, the EmployeeInfo class overrides the following methods

of the matlab.mixin.CustomDisplay class:

• displayNonScalarObject — Called to display nonempty object arrays


• displayEmptyObject — Called to display empty object arrays

The displayNonScalarObject Override

MATLAB calls the displayNonScalarObject method to display object arrays. The

override of this method in the EmployeeInfo class:

• Builds header text using convertDimensionsToString to obtain the array size and
  getClassNameForHeader to get the class name with a link to the help for that class.


• Displays the modified header text.


• Loops through the elements in the array, building two different subheaders depending
  on the individual object state. In the loop, this method:
  
  
  • Detects handles to deleted objects (using the isvalid handle class method). Uses
    getDeletedHandleText and getClassNameForHeader to build text for array
    elements that are handles to deleted objects.
  
  
  • Builds a custom subheader for valid object elements in the array
  
  
  
  


• Creates a PropertyGroup object containing the Name and Department properties
  for valid objects

18 Customizing Object Display