MATLAB SIMULINK 7 - GRAPHICAL USER INTERFACE Uživatelský manuál stáhnout pdf (Strana 307)

Color Palette

12-29

Passing Input Arguments to a GUI

Inputs to the GUI are custom property/value pairs. colorPalette allows one

such property:

Parent. The names are caseinsensitive. The colorPalette

syntax is

mGetColorFcn = colorPalette('Parent',hPaletteContainer)

Definition and Initialization of the Properties.

The colorPalette function first

defines a variable

mInputArgs as varargin to accept the user input arguments.

mInputArgs = varargin; % Command line arguments when invoking

% the GUI

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

cell array.

mPropertyDefs = {... % The supported custom property/value

% pairs of this GUI

'parent', @localValidateInput, 'mPaletteParent';

• 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.

colorPalette then initializes the properties with default values.

mPaletteParent = []; % Use input property 'parent' to initialize

Processing the Input Arguments.

The processUserInputs helper function processes

the input property/value pairs.

colorPalette calls processUserInputs before

it creates the components, to determine the parent of the components.

% Process the command line input arguments supplied when

% the GUI is invoked

processUserInputs();

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.

1 2 ... 302 303 304 305 306 307 308 309 310 311 312 ... 329 330

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MATLAB SIMULINK 7 - GRAPHICAL USER INTERFACE Uživatelský manuál Strana 307