MATLAB Creating Graphical User Interfaces

then the name of the main function is mygui. Each callback in the file is a local function
of that main function.

When GUIDE generates a code file, it automatically includes templates for the most
commonly used callbacks for each component. The code file also contains initialization
code, as well as an opening function callback and an output function callback. It is your
job to add code to the component callbacks for your app to work as you want. You can
also add code to the opening function callback and the output function callback. The code
file orders functions as shown in the following table.

Section Description

Comments Displayed at the command line in response to the help

command.

Initialization GUIDE initialization tasks. Do not edit this code.

Opening function Performs your initialization tasks before the user has access to

the UI.

Output function Returns outputs to the MATLAB command line after the opening

function returns control and before control returns to the

command line.

Component and figure

callbacks

Control the behavior of the window and of individual

components. MATLAB software calls a callback in response to a

particular event for a component or for the figure itself.

Utility/helper functions Perform miscellaneous functions not directly associated with an

event for the figure or a component.

Adding Callback Templates to an Existing Code File

When you save the app, GUIDE automatically adds templates for some callbacks to the
code file. If you want to add other callbacks to the file, you can easily do so.

Within GUIDE, you can add a local callback function template to the code in any of the
following ways. Select the component for which you want to add the callback, and then:

• Right-click the mouse button, and from the View callbacks submenu, select the
  desired callback.


• From View > View Callbacks, select the desired callback.

Files Generated by GUIDE