MATLAB SIMULINK 7 - GRAPHICAL USER INTERFACE Manual de usuario descargar pdf (Pagina 184)

8 Programming the GUI

8-12

When GUIDE generates the template, it creates the callback name by

appending an underscore (_) and the name of the callback property to the

component’s

Tag property. In the example above, pushbutton1 is the Tag

property for the push button, and

Callback is one of the push button’s callback

properties. The

Tag property uniquely identifies a component within the GUI.

The first time you save the GUI after adding a component, GUIDE adds

callbacks for that component to the M-file and generates the callback names

using the current value of the

Tag property. If you want to change the default

Tag value, you should do it before you save the GUI.

See “Associating Callbacks with Components” on page 8-8 for more

information.

Changing Callback Names Assigned by GUIDE

You can change callback names assigned by GUIDE in either of the following

ways:

• “Changing the Tag Property” on page 8-12

• “Changing the Callback Property” on page 8-13

Note If possible, change callback names for a component immediately after

you add the component to the layout and before you save the GUI.

Changing the Tag Property

You can change Tag properties to give a component’s callbacks a more

meaningful name, e.g., you might change the

Tag property from pushbutton1

closebutton. If possible, change the Tag property before saving the GUI,

then GUIDE automatically uses the new value when it names the callbacks.

However, if you change the

Tag property after saving the GUI, GUIDE updates

the following items according to the new

Tag, provided that all components

have distinct tags:

• The component’s callback functions in the M-file

• The value of the component’s callback properties, which you can view in the

Property Inspector

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MATLAB SIMULINK 7 - GRAPHICAL USER INTERFACE Manual de usuario Pagina 184