MATLAB SIMULINK 7 - GRAPHICAL USER INTERFACE Uživatelský manuál stáhnout pdf (Strana 66)

3 Creating a GUI Programmatically

3-18

% Create the data to plot

peaks_data = peaks(35);

membrane_data = membrane;

[x,y] = meshgrid(-8:.5:8);

r = sqrt(x.^2+y.^2) + eps;

sinc_data = sin(r)./r;

% Initialize the GUI.

%Change units to normalized so components resize automatically.

set([f,ha,hsurf,hmesh,hcontour,htext,hpopup],...

'Units','normalized');

%Create a plot in the axes.

current_data = peaks_data;

surf(current_data);

% Assign the GUI a name to appear in the window title.

set(f,'Name','Simple GUI')

% Move the GUI to the center of the screen.

movegui(f,'center')

% Make the GUI visible.

set(f,'Visible','on');

% Callbacks for simple_gui. These callbacks automatically have

% access to component handles and initialized data because

% they are nested at a lower level.

% Pop-up menu callback. Read the pop-up menu Value property

% to determine which item is currently displayed and make it

% the current data.

function popup_menu_Callback(source,eventdata)

% Determine the selected data set.

str = get(source, 'String');

val = get(source,'Value');

% Set current data to the selected data set.

switch str{val};

case 'Peaks' % User selects Peaks

current_data = peaks_data;

case 'Membrane' % User selects Membrane

current_data = membrane_data;

case 'Sinc' % User selects Sinc

current_data = sinc_data;

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MATLAB SIMULINK 7 - GRAPHICAL USER INTERFACE Uživatelský manuál Strana 66