FocusListenerUsing.java Source code

Introduction

Here is the source code for FocusListenerUsing.java

Source

import org.eclipse.swt.SWT;
import org.eclipse.swt.events.FocusEvent;
import org.eclipse.swt.events.FocusListener;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;

public class FocusListenerUsing {
    public static void main(String[] args) {
        Display display = new Display();
        Shell shell = new Shell(display);
        shell.setLayout(new GridLayout(3, true));
        shell.setText("One Potato, Two Potato");
        // Create the focus listener
        FocusListener listener = new FocusListener() {
            public void focusGained(FocusEvent event) {
                Button button = (Button) event.getSource();
                button.setText("I'm It!");
            }

            public void focusLost(FocusEvent event) {
                Button button = (Button) event.getSource();
                button.setText("Pick Me!");
            }
        };

        // Create the buttons and add the listener to each one
        for (int i = 0; i < 6; i++) {
            Button button = new Button(shell, SWT.PUSH);
            button.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));
            button.setText("Pick Me!");
            button.addFocusListener(listener);
        }

        // Display the window
        shell.pack();
        shell.open();
        while (!shell.isDisposed()) {
            if (!display.readAndDispatch()) {
                display.sleep();
            }
        }
        display.dispose();
    }
}