MATLAB SIMULINK 7 - GRAPHICAL USER INTERFACE Uživatelský manuál stáhnout pdf (Strana 43)

100

101

Programming the GUI

2-23

It then uses a switch statement to make the selected data set the current

data. The last statement saves the changes to the

handles structure.

% Determine the selected data set.

str = get(hObject, 'String');

val = get(hObject,'Value');

% Set current data to the selected data set.

switch str{val};

case 'Peaks' % User selects peaks

handles.current_data = handles.peaks;

case 'Membrane' % User selects membrane

handles.current_data = handles.membrane;

case 'Sinc' % User selects sinc

handles.current_data = handles.sinc;

end

% Save the handles structure.

guidata(hObject,handles)

Programming the Push Buttons

Each of the push buttons creates a different type of plot using the data specified

by the current selection in the pop-up menu. The push button callbacks get

data from the

handles structure and then plot it.

1 Display the Surf push button callback in the M-file editor. Right click the

Surf pushbutton in the Layout Editor to display a context menu. From that

menu select

View Callbacks -> Callback.

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MATLAB SIMULINK 7 - GRAPHICAL USER INTERFACE Uživatelský manuál Strana 43

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