public boolean isColumnVisible(int columnIndex) {
??int x = 0;
??int len = table.getColumnCount();
??int lastwidth = 0;
??for (int i = 0; i < len; i++) {
???if (i <= columnIndex) {
????TableColumn tcolumn = table.getColumn(i);
????lastwidth = tcolumn.getWidth();
????x = x + tcolumn.getWidth();
???}
??}
??Rectangle rectangle = table.getClientArea();
??ScrollBar hb = table.getHorizontalBar();
??ScrollBar vb = table.getVerticalBar();
??if (x <= (hb.getSelection() + rectangle.width) && (x >= hb.getSelection()) && ((x - lastwidth) >= hb.getSelection())) {
???return true;
??}
??return false;
?}
public boolean isRowVisible(int row) {
??Rectangle rectangle = table.getClientArea();
??TableItem startItem = table.getItem(new Point(rectangle.x, rectangle.y + table.getHeaderHeight()));
??TableItem endItem = table.getItem(new Point(rectangle.x, rectangle.height - 5));
??if (endItem == null) {
???endItem = table.getItem(table.getItemCount() - 1);
??}
??if (startItem == null || endItem == null)
???return false;
??int startrow = table.indexOf(startItem);
??int endrow = table.indexOf(endItem);
??if (startrow <= row && endrow >= row) {
???return true;
??}
??return false;
?}