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Laying Out a Simple GUI

3-7

Laying Out a Simple GUI

This topic illustrates the basic steps for laying out a GUI.

• “Creating the Figure” on page 3-7

• “Adding the Components” on page 3-7

Creating the Figure

In MATLAB, a GUI is a figure. This first step creates the figure and positions

it on the screen. It also makes the GUI invisible so that the GUI user cannot

see the components being added or initialized. When the GUI has all its

components and is initialized, the example makes it visible.

% Initialize and hide the GUI as it is being constructed.

f = figure('Visible','off','Position',[360,500,450,285]);

The call to the figure function uses two property/value pairs. The Position

property is a 4-element vector that specifies the location of the GUI on the

screen and its size: [distance from left, distance from bottom, height, width].

Default units are pixels.

The next topic, “Adding the Components” on page 3-7, shows you how to add

the push buttons, axes, and other components to the GUI

Adding the Components

The example GUI has six components: 3 push buttons, 1 static text, 1 pop-up

menu, and 1 axes. Start by writing statements that add these components to

the GUI. Create the push buttons, static text, and pop-up menu with the

uicontrol function. Use the axes function to create the axes.

1 Add the three push buttons to your GUI by adding these statements to your

M-file following the call to

figure.

% Construct the components.

hsurf = uicontrol('Style','pushbutton',...

'String','Surf','Position',[315,220,70,25]);

hmesh = uicontrol('Style','pushbutton',...

'String','Mesh','Position',[315,180,70,25]);

hcontour = uicontrol('Style','pushbutton',...

'String','Countour','Position',[315,135,70,25]);

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MATLAB SIMULINK 7 - GRAPHICAL USER INTERFACE Manuale Utente Pagina 55