Accessing data from Radio Buttons

Hello,

perhaps this is a better way to phrase my question. I have a group of radio buttons within a panel. I need to know which one is selected to use in simple "If/Then" statements

If (this radio button is selected && this menu item is clicked) Execute this

I am using the code from an online example

http://blinkdagger.com/matlab/matlab-gui-tutorial-buttons-button-group/

I am trying

get(handles.radiobutton1, 'Value')

to access what it is but no matter which button of the four I have selected all handles are apprearing as zero.

Thank you

Answer 1

[Matt Fig]

I don't know why that would be so. Here is an example. Choosing a radiobutton prints the selected state to the command window.

function [] = radio_panel()
P = uibuttongroup('selectionc',@btngrp_sel,...
                 'units','pix',...
                 'pos',[10 10 100 200]);
for ii = 1:4
r(ii) = uicontrol(P,'style','radio',...
                 'units','pix',...
                 'pos',[10 10+50*(ii-1) 80 30],...
                 'string',['radio',num2str(ii)]);
end

guidata(gcf,r)  % Save the handle to the radio buttons.
set(P,'selectedO',[]) % Initially no selection.

function [] = btngrp_sel(varargin)

r = guidata(gcbf);
get(r,'value')  % Should print a 4 element array.  Only one non-zero

Answer 2

[Fangjun Jiang]

Bill, let's work out this "button group" issue first. Your code in previous post is overly complicated.

Start with a new GUI, drag and drop a "button group", drag and drop 4 radio buttons inside the "button group" panel.

In the SelectionChangeFcn callback of the "button group", type in the following single line.

disp(get(hObject,'Tag'));

Then run your GUI and click different buttons, see what happened in the command window. That's how it works.

Answer 3

[Walter Roberson]

Get the SelectedObject property of the uibuttongroup, and get() the Tag of that object (having set the tags uniquely when you created the buttons.)

Note: in previous postings, people indicated that one of the buttons must be selected; that is incorrect. You can have nothing selected by setting the SelectedObject property to []