Creating Graphical User Interfaces

Functions and Callbacks in the M-File

You can add code to the following parts of the GUI M-file:

• Opening function -- executes before the GUI becomes visible to the user.
• Output function -- outputs data to the command line, if necessary.
• Callbacks -- execute each time the user activates the corresponding component of the GUI.

Common Input Arguments

All functions in the M-file have the following input arguments corresponding to the handles structure:

• hObject -- the handle to the figure or Callback object
• handles -- structure with handles and user data (see guidata)

The handles structure is saved at the end of each function with the command

• guidata(hObject, handles);
  

Additional arguments for the opening and output functions are described in the following sections.

Sharing Data with the Handles Structure

Opening Function