Snippet169.java Source code

Introduction

Here is the source code for Snippet169.java

Source

/*
 * Make a toggle button have radio behavior
 *
 * For a list of all SWT example snippets see
 * http://dev.eclipse.org/viewcvs/index.cgi/%7Echeckout%7E/platform-swt-home/dev.html#snippets
 */

import org.eclipse.swt.SWT;
import org.eclipse.swt.layout.FillLayout;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Control;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Event;
import org.eclipse.swt.widgets.Listener;
import org.eclipse.swt.widgets.Shell;

public class Snippet169 {
    public static void main(String[] args) {
        Display display = new Display();
        final Shell shell = new Shell(display);
        shell.setLayout(new FillLayout());
        Listener listener = new Listener() {
            public void handleEvent(Event e) {
                Control[] children = shell.getChildren();
                for (int i = 0; i < children.length; i++) {
                    Control child = children[i];
                    if (e.widget != child && child instanceof Button && (child.getStyle() & SWT.TOGGLE) != 0) {
                        ((Button) child).setSelection(false);
                    }
                }
                ((Button) e.widget).setSelection(true);
            }
        };
        for (int i = 0; i < 20; i++) {
            Button button = new Button(shell, SWT.TOGGLE);
            button.setText("B" + i);
            button.addListener(SWT.Selection, listener);
            if (i == 0)
                button.setSelection(true);
        }
        shell.pack();
        shell.open();
        while (!shell.isDisposed()) {
            if (!display.readAndDispatch())
                display.sleep();
        }
        display.dispose();
    }
}