public static void main(String[] args) { final Display display = new Display(); Shell shell = new Shell(display); shell.setLayout(new FillLayout()); final Tree tree = new Tree(shell, SWT.FULL_SELECTION | SWT.BORDER); tree.setHeaderVisible(true); TreeColumn column0 = new TreeColumn(tree, SWT.LEFT); column0.setText("Column 0"); TreeColumn column1 = new TreeColumn(tree, SWT.LEFT); column1.setText("Column 1"); TreeColumn column2 = new TreeColumn(tree, SWT.LEFT); column2.setText("Column 2"); for (int i = 0; i < 9; i++) { TreeItem item = new TreeItem(tree, SWT.NONE); item.setText("item " + i); item.setText(1, "column 1 - " + i); item.setText(2, "column 2 - " + i); for (int j = 0; j < 9; j++) { TreeItem subItem = new TreeItem(item, SWT.NONE); subItem.setText("item " + i + " " + j); subItem.setText(1, "column 1 - " + i + " " + j); subItem.setText(2, "column 2 - " + i + " " + j); for (int k = 0; k < 9; k++) { TreeItem subsubItem = new TreeItem(subItem, SWT.NONE); subsubItem.setText("item " + i + " " + j + " " + k); subsubItem.setText(1, "column 1 - " + i + " " + j + " " + k); subsubItem.setText(2, "column 2 - " + i + " " + j + " " + k); } } } column0.pack(); column1.pack(); column2.pack(); Heartbeat = new Runnable() { @Override public void run() { if (!Tracking || tree.isDisposed()) return; Point cursor = display.getCursorLocation(); cursor = display.map(null, tree, cursor); Scroll(tree, cursor.x, cursor.y); display.timerExec(ScrollSpeed, Heartbeat); } }; Listener listener = new Listener() { @Override public void handleEvent(Event event) { switch (event.type) { case SWT.MouseEnter: Tracking = true; display.timerExec(0, Heartbeat); break; case SWT.MouseExit: Tracking = false; break; } } }; tree.addListener(SWT.MouseEnter, listener); tree.addListener(SWT.MouseExit, listener); shell.open(); while (!shell.isDisposed()) { if (!display.readAndDispatch()) display.sleep(); } display.dispose(); }