/**
* Gets the width of the receiver.
*
* @return the width
* @exception SWTException
* <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver
* </ul>
*/
public int getWidth() {
checkWidget();
int width = (int) nsColumn.width();
// TODO how to differentiate 0 and 1 cases?
if (width > 0) width += Tree.CELL_GAP;
return width;
}
