Source Code : Scroll SWT widgets into view when they get focus

Java Is Open Source Programming Language You Can Download From Java and Java Libraries From http://www.oracle.com. Click Here to download
We provide this code related to title for you to solve your developing problem easily. Libraries which is import in this program you can download from http://www.oracle.com. Click Here or search from google with Libraries Name you get jar file related it

Scroll SWT widgets into view when they get focus

import org.eclipse.swt.SWT;
import org.eclipse.swt.custom.ScrolledComposite;
import org.eclipse.swt.graphics.Point;
import org.eclipse.swt.graphics.Rectangle;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Composite;
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;

/*
 * Scroll widgets into view when they get focus
 * 
 * For a list of all SWT example snippets see
 * http://dev.eclipse.org/viewcvs/index.cgi/%7Echeckout%7E/platform-swt-home/dev.html#snippets
 */

public class Snippet188 {

  public static void main(String[] args) {
    Display display = new Display();
    Shell shell = new Shell(display);
    shell.setLayout(new GridLayout());
    Button b1 = new Button(shell, SWT.PUSH);
    b1.setText("top");
    b1
        .setLayoutData(new GridData(SWT.FILL, SWT.CENTER, false, false,
            1, 1));
    final ScrolledComposite sc = new ScrolledComposite(shell, SWT.BORDER
        | SWT.H_SCROLL | SWT.V_SCROLL);
    sc.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true, 1, 1));
    Composite c = new Composite(sc, SWT.NONE);
    c.setLayout(new GridLayout(10, true));
    for (int i = 0; i < 300; i++) {
      Button b = new Button(c, SWT.PUSH);
      b.setText("Button " + i);
    }
    Button b2 = new Button(shell, SWT.PUSH);
    b2.setText("bottom");
    b2
        .setLayoutData(new GridData(SWT.FILL, SWT.CENTER, false, false,
            1, 1));

    sc.setContent(c);
    sc.setExpandHorizontal(true);
    sc.setExpandVertical(true);
    sc.setMinSize(c.computeSize(SWT.DEFAULT, SWT.DEFAULT));

    Listener listener = new Listener() {
      public void handleEvent(Event e) {
        Control child = (Control) e.widget;
        Rectangle bounds = child.getBounds();
        Rectangle area = sc.getClientArea();
        Point origin = sc.getOrigin();
        if (origin.x > bounds.x)
          origin.x = Math.max(0, bounds.x);
        if (origin.y > bounds.y)
          origin.y = Math.max(0, bounds.y);
        if (origin.x + area.width < bounds.x + bounds.width)
          origin.x = Math
              .max(0, bounds.x + bounds.width - area.width);
        if (origin.y + area.height < bounds.y + bounds.height)
          origin.y = Math.max(0, bounds.y + bounds.height
              - area.height);
        sc.setOrigin(origin);
      }
    };
    Control[] controls = c.getChildren();
    for (int i = 0; i < controls.length; i++) {
      controls[i].addListener(SWT.Activate, listener);
    }
    shell.setSize(300, 500);
    shell.open();
    while (!shell.isDisposed()) {
      if (!display.readAndDispatch())
        display.sleep();
    }
    display.dispose();
  }
}

           
       

Thank with us