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Home » Eclipse Projects » Standard Widget Toolkit (SWT) » radio button group with no default selection
radio button group with no default selection [message #514872] Tue, 16 February 2010 23:34 Go to next message
luke w patterson is currently offline luke w pattersonFriend
Messages: 2
Registered: July 2009
Junior Member
didn't know until now about this user list, crossposting from dev list
------------------------------------------------------------ --------------

ok, I give up, hopefully someone can point me to a link and I'll be on my
way, what I want sounds simple enough, but I've been working on it with two
other team members for 4 hours now with no luck,

I want to create a reusable composite class that contains radio buttons and
I don't want any of them to be selected by default. It seems that when a
shell is activated that contains radio buttons, the first radio button on
the page gets selected. I found a partial answer here: ant-radio-buttons-not-initially-selected.html

that answer kinda works, but I don't want to mess up traversal, and I don't
want to add dummy buttons. Is it the OS that is selecting a default? or
SWT? How can I suppress that behavior or distinguish between OS noise and
actual user input?



swt 3.5, windows (i'm guessing part of the answer will involve the words
"windows 'feature'")
Re: radio button group with no default selection [message #514898 is a reply to message #514872] Wed, 17 February 2010 04:51 Go to previous messageGo to next message
Vijay RajFriend
Messages: 608
Registered: July 2009
Senior Member
It is a pickle....

see this snippet

import org.eclipse.swt.SWT;
import org.eclipse.swt.layout.RowLayout;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.widgets.Shell;

public class RadioButtons

    public RadioButtons()
        Display display = new Display();
        Shell shell = new Shell(display);

        shell.setLayout(new RowLayout());

        Label label = new Label(shell, SWT.NULL);
        label.setText("Gender: ");

        Button femaleButton = new Button(shell, SWT.RADIO);

        Button maleButton = new Button(shell, SWT.RADIO);
        // Button aleButton = new Button(shell, SWT.RADIO);
        // aleButton.setText("M");
        // Button leButton = new Button(shell, SWT.RADIO);
        // leButton.setText("M");

        label = new Label(shell, SWT.NULL);
        label.setText("  Title: ");

        Composite composite = new Composite(shell, SWT.None);
        composite.setLayout(new RowLayout());

        Button mrButton = new Button(composite, SWT.RADIO);

        Button mrsButton = new Button(composite, SWT.RADIO);
        Button msButton = new Button(composite, SWT.RADIO);

        label = new Label(composite, SWT.NULL);
        label.setText("Education: ");

        Composite composite1 = new Composite(composite, SWT.None);
        composite1.setLayout(new RowLayout());

        Button mrButton1 = new Button(composite1, SWT.RADIO);
        mrButton1.setText("High School");

        Button mrsButton1 = new Button(composite1, SWT.RADIO);
        Button msButton1 = new Button(composite1, SWT.RADIO);
        msButton1.setText("Post Graduate");
        // Button drButton = new Button(composite, SWT.RADIO);
        // drButton.setText("Dr.");

        // textUser.forceFocus();

        // Set up the event loop.
        while (!shell.isDisposed())
            if (!display.readAndDispatch())
                // If no more entries in event queue


    private void init()


    public static void main(String[] args)
        new RadioButtons();

radio buttons on shell
and on composite1 are not selected by default...

although if remove composite...
then default button enablement comes up...

why, mr. Anderson, why, why do you persist?
Because I Choose To.
Re: radio button group with no default selection [message #515045 is a reply to message #514898] Wed, 17 February 2010 14:50 Go to previous message
luke w patterson is currently offline luke w pattersonFriend
Messages: 2
Registered: July 2009
Junior Member
vijay wrote on Tue, 16 February 2010 23:51
It is a pickle....

see this snippet

Thanks Vijay

so it looks like the only workarounds involve tricking clippy?

it seems so strange that I can't offer a reusable composite containing radio choices which states that it can be enabled with nothing selected
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