Adds to the receiver a quadratic curve based on the parameters.
@param cx the x coordinate of the control point of the spline
@param cy the y coordinate of the control point of the spline
@param x the x coordinate of the end point of the spline
@param y the y coordinate of the end point of the spline
@exception SWTException <ul>
<li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
</ul>
Adds to the receiver a quadratic curve based on the parameters.
@param cx the x coordinate of the control point of the spline @param cy the y coordinate of the control point of the spline @param x the x coordinate of the end point of the spline @param y the y coordinate of the end point of the spline
@exception SWTException <ul> <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> </ul>