MATLAB SIMULINK 7 - GRAPHICAL USER INTERFACE Manual do Utilizador descarregar pdf (Página 319)

Icon Editor

12-41

1 processUserInputs sequences through the inputs, if any, and tries to match

each property name to a string in the first column of the

mPropertyDefs cell

array.

2 If it finds a match, processUserInputs assigns the value that was input for

the property to its variable in the third column of the

mPropertyDefs cell

array.

3 processUserInputs then calls the helper function specified in the second

column of the

mPropertyDefs cell array to validate the value that was

passed in for the property.

Retrieving Output on Return from a GUI

If you call iconEditor with an output argument, it returns a truecolor image

as an n-by-m-by-3 array.

The data definition section of the M-file creates a cell array to hold the output:

mOutputArgs = {}; % Variable for storing output when GUI returns

Following the call to uiwait, which stops the sequential execution of the M-file,

iconEdit assigns the constructed icon array,

mIconEdit, to the cell array

mOutputArgs and then assigns mOutputArgs to varargout to return the

arguments.

mOutputArgs{} =mIconCData;

if nargout>0

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

end

This code is the last that iconEditor executes before returning. It executes only

after clicking the

OK or Cancel button triggers execution of

hOKButtonCallback or hCancelButtonCallback, which call uiresume to

resume execution.

Protecting a GUI from Inadvertent Access

The prepareLayout utility function protects the iconEditor from inadvertently

being altered from the command line by setting the

HandleVisibility

properties of all the components. The iconEditor calls

prepareLayout with the

handle of the main figure, in the initialization section of the M-file.

% Make changes needed for proper look and feel and running on

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MATLAB SIMULINK 7 - GRAPHICAL USER INTERFACE Manual do Utilizador Página 319