MATLAB SIMULINK 7 - GRAPHICAL USER INTERFACE Podręcznik Użytkownika Pobierz pdf (Strona 736)

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15 Examples of GUIs Created Programmatically

When the user clicks the Cancel button, its callback,

hOCancelButtonCallback, effectively deletes the icon data then

calls

uiresume. Thisenablesthecodefiletoresumeexecutionwhereit

stopped but it returns a null matrix.

function hCance lBut tonCallback(hObject, eventdata)

% Callback called when the Cancel button i s pressed

mIconCData =[];

uiresume;

delete(hMainFigure);

end

Pass Input Arguments to a GUI

Inputs to the GUI are custom property/value pairs. iconEdit allows three

such properties:

IconWidth, IconHeight,andIconFile. The names are

caseinsensitive.

Definition and Initialization of the Properties. The

iconEdit first defines

a variable

mInputArgs as varargin to accept the user input arguments.

mInputArgs = varargin; % Command line arguments when invoking

%theGUI

The iconEdit function then defines the valid custom properties in a 3-by-3

cell array.

mPropertyDefs = {... % Supported custom property/value

% pairs of this GUI

'iconwidth', @localValidateInput, 'mIconWidth';

'iconheight', @localValidateInput, 'mIconHeight';

'iconfile', @localValidateInput, 'mIconFile'};

• The first column contains the property name.

• The second column contains a function handle for the function,

localValidateInput, that validates the input property values .

• The third column is the local variable that holds the value of the property.

iconEdit then initializes the properties with default values.

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