Returns the <em>advance width</em> of the specified character in
the font which is currently selected into the receiver.
<p>
The advance width is defined as the horizontal distance the cursor
should move after printing the character in the selected font.
</p>
@param ch the character to measure
@return the distance in the x direction to move past the character before painting the next
@exception SWTException <ul>
<li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
</ul>
Returns the <em>advance width</em> of the specified character in the font which is currently selected into the receiver. <p> The advance width is defined as the horizontal distance the cursor should move after printing the character in the selected font. </p>
@param ch the character to measure @return the distance in the x direction to move past the character before painting the next
@exception SWTException <ul> <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> </ul>