Snippet19.java Source code

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Here is the source code for Snippet19.java

Source

/*
 * Text example snippet: verify input (only allow digits)
 *
 * 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.widgets.Display;
import org.eclipse.swt.widgets.Event;
import org.eclipse.swt.widgets.Listener;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.widgets.Text;

public class Snippet19 {

    public static void main(String[] args) {
        Display display = new Display();
        Shell shell = new Shell(display);
        Text text = new Text(shell, SWT.BORDER | SWT.V_SCROLL);
        text.setBounds(10, 10, 200, 200);
        text.addListener(SWT.Verify, new Listener() {
            public void handleEvent(Event e) {
                String string = e.text;
                char[] chars = new char[string.length()];
                string.getChars(0, chars.length, chars, 0);
                for (int i = 0; i < chars.length; i++) {
                    if (!('0' <= chars[i] && chars[i] <= '9')) {
                        e.doit = false;
                        return;
                    }
                }
            }
        });
        shell.open();
        while (!shell.isDisposed()) {
            if (!display.readAndDispatch())
                display.sleep();
        }
        display.dispose();
    }
}