MATLAB Creating Graphical User Interfaces

Write Callbacks in GUIDE

In this section...

“Callbacks for Different User Actions” on page 7-2

“GUIDE-Generated Callback Functions and Property Values” on page 7-4

“GUIDE Callback Syntax” on page 7-5

“Renaming and Removing GUIDE-Generated Callbacks” on page 7-6

Callbacks for Different User Actions

UI and graphics components have certain properties that you can associate with specific

callback functions. Each of these properties corresponds to a specific user action. For

example, a uicontrol has a property called Callback. You can set the value of this

property to be a handle to a callback function, an anonymous function, or a character

vector containing a MATLAB expression. Setting this property makes your app respond

when the user interacts with the uicontrol. If the Callback property has no specified

value, then nothing happens when the user interacts with the uicontrol.

This table lists the callback properties that are available, the user actions that trigger the

callback function, and the most common UI and graphics components that use them.

Callback

Property

User Action Components That Use This

Property

ButtonDownFcnEnd user presses a mouse button

while the pointer is on the

component or figure.

axes, figure, uibuttongroup,

uicontrol, uipanel, uitable,

Callback End user triggers the component.

For example: selecting a menu

item, moving a slider, or pressing a

push button.

uicontextmenu, uicontrol,

uimenu

CellEditCallb

ack

End user edits a value in a table

whose cells are editable.

uitable

CellSelection

Callback

End user selects cells in a table. uitable

7 Programming a GUIDE App