MATLAB SIMULINK 7 - GRAPHICAL USER INTERFACE Guia do Utilizador descarregar pdf (Página 458)

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10 Examples of GUIDE GUIs

• Com mand-line accessib ility: Off

• GUI O ptions selecte d:

- Generate callback function prototypes

- Application allows only one instance to run

Call the GUI

You can invoke the GUI with no arguments, in which case the GUI uses the

default address book MAT-file, or you can specify an alternate MAT-file

from which the GUI reads information. In this example, the user calls the

GUI with a pair of argument s,

address_book('book', 'my_list.mat').

The first argument,

'book', is a key word that the code looks for in the

opening function. If the key word matches, the code uses the second

argument as the M AT-file for the a ddress book. Calling the GUI with this

syntax is analogous to calling it w ith a valid property -v alue pair, such as

('color', 'r ed') . However, since 'book' is not a valid figure property, the

address_book opening function provides code to recognize the pair ('book',

'my_list.mat')

It is not necessary to use the key word

'book'. You can program the

code file to accept just the MAT-file as an argument, using the syntax

address_book('my_list.mat'). The advantage of calling the GUI with

the p air

('book', 'my _lis t.mat') is that yo u can program the GU I to

accept other user arguments, as well as valid figure properties, using the

property-value pair syntax. The GUI c an then identify which property the

user wants to specify from the property name.

The following code show s how to program the opening function to look for the

key word

'book', and if it finds the key word, to use the MAT-file specified by

the second argument as the list of contacts.

function addres s_bo ok_OpeningFcn(hObject, eventdata,...

handles, vararg in)

% Choose default command li ne output for addre ss_book

handles.output = hObject;

% Update handles structure

guidata(hObject, handles);

% User added code follows

if nargin < 4

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