MATLAB SIMULINK 7 - GRAPHICAL USER INTERFACE Uživatelský manuál stáhnout pdf (Strana 39)

Programming the GUI

2-19

Programming the GUI

When you saved your GUI in the previous topic, “Saving the GUI Layout” on

page 2-17, GUIDE created two files: a FIG-file

simple_gui.fig that contains

the GUI layout, and an M-file

simple_gui.m that contains the code that

controls the GUI. But the GUI didn’t do anything because there was no code in

the M-file to make it work. This topic shows you how to add code to the M-file

to make it work. There are three steps:

• “Generating Data to Plot” on page 2-19

• “Programming the Pop-Up Menu” on page 2-21

• “Programming the Push Buttons” on page 2-23

Generating Data to Plot

This topic shows you how to generate the data to be plotted when the user

clicks a button. This data is generated in the opening function. The opening

function is the first callback in every GUIDE-generated GUI M-file. You can

use it to perform tasks that need to be done before the user has access to the

GUI.

In this example, you add code that creates three data sets to the opening

function. The code uses the MATLAB functions

peaks, membrane, and sinc.

1 Display the opening function in the M-file editor. If the GUI M-file,

simple_gui.m, is not already open in your editor, open it by selecting M-file

Editor from the View menu. In the editor, click the function icon on the

toolbar, then click

simple_gui_OpeningFcn in the pop-up menu that

displays.

1 2 ... 34 35 36 37 38 39 40 41 42 43 44 ... 329 330

Žádné komentáře

MATLAB SIMULINK 7 - GRAPHICAL USER INTERFACE Uživatelský manuál Strana 39