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Edit a cell in a SWT table (in place, fancy)

/*  * TableEditor example snippet: edit a cell in a table (in place, fancy)  *  * 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.custom.TableEditor; import org.eclipse.swt.graphics.Point; import org.eclipse.swt.graphics.Rectangle; import org.eclipse.swt.layout.FillLayout; 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.Table; import org.eclipse.swt.widgets.TableColumn; import org.eclipse.swt.widgets.TableItem; import org.eclipse.swt.widgets.Text; public class Snippet124 {   public static void main(String[] args) {     Display display = new Display();     Shell shell = new Shell(display);     shell.setLayout(new FillLayout());     final Table table = new Table(shell, SWT.BORDER | SWT.MULTI);     table.setLinesVisible(true);     for (int i = 0; i < 3; i++) {       TableColumn column = new TableColumn(table, SWT.NONE);       column.setWidth(100);     }     for (int i = 0; i < 3; i++) {       TableItem item = new TableItem(table, SWT.NONE);       item.setText(new String[] { "" + i, "" + i, "" + i });     }     final TableEditor editor = new TableEditor(table);     editor.horizontalAlignment = SWT.LEFT;     editor.grabHorizontal = true;     table.addListener(SWT.MouseDown, new Listener() {       public void handleEvent(Event event) {         Rectangle clientArea = table.getClientArea();         Point pt = new Point(event.x, event.y);         int index = table.getTopIndex();         while (index < table.getItemCount()) {           boolean visible = false;           final TableItem item = table.getItem(index);           for (int i = 0; i < table.getColumnCount(); i++) {             Rectangle rect = item.getBounds(i);             if (rect.contains(pt)) {               final int column = i;               final Text text = new Text(table, SWT.NONE);               Listener textListener = new Listener() {                 public void handleEvent(final Event e) {                   switch (e.type) {                   case SWT.FocusOut:                     item.setText(column, text.getText());                     text.dispose();                     break;                   case SWT.Traverse:                     switch (e.detail) {                     case SWT.TRAVERSE_RETURN:                       item                           .setText(column, text                               .getText());                     // FALL THROUGH                     case SWT.TRAVERSE_ESCAPE:                       text.dispose();                       e.doit = false;                     }                     break;                   }                 }               };               text.addListener(SWT.FocusOut, textListener);               text.addListener(SWT.Traverse, textListener);               editor.setEditor(text, item, i);               text.setText(item.getText(i));               text.selectAll();               text.setFocus();               return;             }             if (!visible && rect.intersects(clientArea)) {               visible = true;             }           }           if (!visible)             return;           index++;         }       }     });     shell.pack();     shell.open();     while (!shell.isDisposed()) {       if (!display.readAndDispatch())         display.sleep();     }     display.dispose();   } }