Returns the line height.
<p>
Note: this API should not be used if a StyleRange attribute causes lines to
have different heights (i.e. different fonts, rise, etc).
</p>
@return line height in pixel.
@exception SWTException <ul>
<li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
<li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
</ul>
@see #getLineHeight(int)
Returns the line height. <p> Note: this API should not be used if a StyleRange attribute causes lines to have different heights (i.e. different fonts, rise, etc). </p>
@return line height in pixel. @exception SWTException <ul> <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> </ul> @see #getLineHeight(int)