MATLAB SIMULINK 7 - GRAPHICAL USER INTERFACE Manuale Utente Scaricare il pdf (Pagina 60)

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3 A Simple Programmatic UI

3-8

end

function contourbutton_Callback(source,eventdata)

% Display contour plot of the currently selected data.

contour(current_data);

end

Program the Callbacks

When the user selects a data set from the pop-up menu or clicks one of the push buttons,

MATLAB software executes the callback associated with that particular event. Use each

component's Callback property to specify the name of the callback with which each

event is associated.

To the uicontrol statement that defines the Surf push button, add the property/

value pair

'Callback',{@surfbutton_Callback}

so that the statement looks like this:

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

'Position',[315,220,70,25],...

'Callback',{@surfbutton_Callback});

Callback is the name of the property. surfbutton_Callback is the name of the

callback that services the Surf push button.

To the uicontrol statement that defines the Mesh push button, add the property/

value pair

'Callback',@meshbutton_Callback

To the uicontrol statement that defines the Contour push button, add the

property/value pair

'Callback',@contourbutton_Callback

To the uicontrol statement that defines the pop-up menu, add the property/value

pair

'Callback',@popup_menu_Callback

For more information, see “Write Callbacks Using the Programmatic Workflow” on page

11-5.

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MATLAB SIMULINK 7 - GRAPHICAL USER INTERFACE Manuale Utente Pagina 60

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