MATLAB SIMULINK 7 - GRAPHICAL USER INTERFACE Uživatelský manuál stáhnout pdf (Strana 477)

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101

UI for a Program That Accepts Arguments

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Clicking a color cell toggle button makes the program perform these actions:

• Display the selected color in the preview area.

• Display the red, green, and blue values for the newly selected color are displayed

in the R, G, and B fields in the UI.

Clicking the Eraser toggle button is equivalent to selecting no color.

Clicking the More Colors button displays a second dialog box containing more

colors.

Clicking the close box on the main dialog returns a function handle. You can call the

returned function to get the RGB values of the selected color. For example, this code

calls the ColorPalette program, which returns a function handle in the variable,

getmycolor. The second line calls getmycolor to get the RGB values.

getmycolor = colorPalette;

rgb = getmycolor();

The getmycolor function returns a 1-by-3 vector of values. It returns a NaN value if

the user selects the Eraser button.

Call the colorPalette Function With Input Arguments

You can call the colorPalette function with input arguments:

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