Toggle Button Callback :: Working with Callbacks (Draft) (Creating Graphical User Interfaces)

Creating Graphical User Interfaces

Toggle Button Callback

The callback for a toggle button needs to query the toggle button to determine what state it is in. MATLAB sets the Value property equal to the Max property when the toggle button is depressed (Max is 1 by default) and equal to the Min property when the toggle button is not depressed (Min is 0 by default).

From the GUI M-file

The following code illustrates how to program the callback in the GUI M-file.

function togglebutton1_Callback(hObject, eventdata, handles)
button_state = get(hObject,'Value');
if button_state == get(hObject,'Max')
    % toggle button is pressed
elseif button_state == get(hObject,'Min')
    % toggle button is not pressed
end

Note If you have toggle buttons that are managed by a button group component, you must include the code to control them in the button group's SelectionChangeFcn callback function, not in the individual toggle button Callback functions. A button group overwrites the Callback properties of radio buttons and toggle buttons that it manages. See Button Groups for more information.

Adding an Image to a Push Button or Toggle Button

Assign the CData property an m-by-n-by-3 array of RGB values that define a truecolor image. For example, the array a defines 16-by-128 truecolor image using random values between 0 and 1 (generated by rand).

a(:,:,1) = rand(16,128);
a(:,:,2) = rand(16,128);
a(:,:,3) = rand(16,128);
set(hObject,'CData',a)

See ind2rgb for information on converting an (X, MAP) image to an RGB image.

Examples of Callbacks for GUI Components Radio Buttons