MATLAB SIMULINK 7 - GRAPHICAL USER INTERFACE Manuale Utente Scaricare il pdf (Pagina 254)

10 Examples of GUIDE GUIs

10-30

• The which command returns the full path to the file when it is on the

MATLAB path

• The

web command displays the file in the Help browser.

This is the

Help button callback.

function HelpButton_Callback(hObject, eventdata, handles)

HelpPath = which('f14ex_help.html');

web(HelpPath);

You can also display the help document in a Web browser or load an external

URL. See the Web documentation for a description of these options.

Closing the GUI

The GUI Close button callback closes the plot figure, if one exists and then

closes the GUI. The handle of the plot figure and the GUI figure are available

from the

handles structure. The callback executes two steps:

• Checks to see if there is a

PlotFigure field in the handles structure and if it

contains a valid figure handle (the user could have closed the figure

manually).

• Closes the GUI figure

This is the

Close button callback.

function CloseButton_Callback(hObject, eventdata, handles)

% Close the GUI and any plot window that is open

if isfield(handles,'PlotFigure') && ...

ishandle(handles.PlotFigure),

close(handles.PlotFigure);

end

close(handles.F14ControllerEditor);

The List Box Callback and Create Function

This GUI does not use the list box callback since the actions performed on list

box items are carried out by push buttons (

Simulate and store results,

Remove, and Plot). However, GUIDE automatically inserts a callback stub

when you add the list box and automatically sets the

Callback property to

execute this subfunction whenever the callback is triggered (which happens

when users select an item in the list box).

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MATLAB SIMULINK 7 - GRAPHICAL USER INTERFACE Manuale Utente Pagina 254