Sets the line spacing of the receiver. The line spacing
is the space left between lines.
@param spacing the new line spacing
@exception IllegalArgumentException <ul>
<li>ERROR_INVALID_ARGUMENT - if the spacing is negative</li>
</ul>
@exception SWTException <ul>
<li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
</ul>
Sets the line spacing of the receiver. The line spacing is the space left between lines.
@param spacing the new line spacing
@exception IllegalArgumentException <ul> <li>ERROR_INVALID_ARGUMENT - if the spacing is negative</li> </ul> @exception SWTException <ul> <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> </ul>