MATLAB SIMULINK 7 - GRAPHICAL USER INTERFACE Bedienungsanleitung PDF herunterladen (Seite 317)

Icon Editor

12-39

Returning Only After the User Makes a Choice

At the end of the initialization code, and just before returning, iconEditor calls

uiwait with the handle of the main figure to make the GUI blocking.

% Make the GUI blocking

uiwait(hMainFigure);

% Return the edited icon CData if it is requested

mOutputArgs{1} =hMainFigure;

mOutputArgs{2} =mIconCData;

if nargout>0

[varargout{1:nargout}] = mOutputArgs{:};

end

Placement of the call to uiwait is important. Calling uiwait stops the

sequential execution of the

iconEdit M-file after the GUI is initialized and just

before the file would return the edited icon data.

When the user clicks the

OK button, its callback, hOKButtonCallback, calls

uiresume which enables the M-file to resume execution where it stopped and

return the edited icon data.

function hOKButtonCallback(hObject, eventdata)

% Callback called when the OK button is pressed

uiresume;

delete(hMainFigure);

end

When the user clicks the Cancel button, its callback,

hOCancelButtonCallback, effectively deletes the icon data then calls

uiresume. This enables the M-file to resume execution where it stopped but it

returns a null matrix.

function hCancelButtonCallback(hObject, eventdata)

% Callback called when the Cancel button is pressed

mIconCData =[];

uiresume;

delete(hMainFigure);

end

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MATLAB SIMULINK 7 - GRAPHICAL USER INTERFACE Bedienungsanleitung Seite 317