MATLAB SIMULINK 7 - GRAPHICAL USER INTERFACE Manuale Utente Scaricare il pdf (Pagina 183)

Callback Syntax and Arguments

8-11

Callback Syntax and Arguments

GUIDE defines conventions for callback syntax and arguments and

implements these conventions in the callback templates it adds to the M-file.

Each template is similar to this one for the

Callback subfunction for a push

button.

% --- Executes on button press in pushbutton1.

function pushbutton1_Callback(hObject, eventdata, handles) %#ok

% hObject handle to pushbutton1 (see GCBO)

% eventdata reserved - to be defined in a future version of MATLAB

% handles structure with handles and user data (see GUIDATA)

...

The first comment line describes the event that triggers execution of the

callback. This is followed by the function definition line. The remaining

comments describe the input arguments.

Insert your code after the last comment.

Note You can avoid automatic generation of the callback comment lines for

new callbacks. In the

Preferences dialog box, select GUIDE and uncheck Add

comments for newly generated callback functions.

This topic discusses these aspects of the template:

• “Naming of Callback Functions” on page 8-11

• “Changing Callback Names Assigned by GUIDE” on page 8-12

• “Input Arguments” on page 8-13

• “The Handles Structure” on page 8-13

Naming of Callback Functions

The callback example above shows the following function definition:

function pushbutton1_Callback(hObject,eventdata,handles)

1 2 ... 178 179 180 181 182 183 184 185 186 187 188 ... 329 330

Nessun commento

MATLAB SIMULINK 7 - GRAPHICAL USER INTERFACE Manuale Utente Pagina 183