Sets the state of the receiver. The state must be one of these values:
<ul>
<li>{@link SWT#NORMAL}</li>
<li>{@link SWT#ERROR}</li>
<li>{@link SWT#PAUSED}</li>
</ul>
@param state the new state
@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>
Sets the state of the receiver. The state must be one of these values: <ul> <li>{@link SWT#NORMAL}</li> <li>{@link SWT#ERROR}</li> <li>{@link SWT#PAUSED}</li> </ul>
@param state the new state
@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>
@since 3.4