Bug 189847 [DND] Combo/Text on Linux does not fire Drop event.
examples/org.eclipse.swt.examples/src/org/eclipse/swt/examples/dnd/DNDExample.java
}
		public void dragOperationChanged(DropTargetEvent event) {
			dropConsole.append(">>dragOperationChanged\n");
			printEvent(event);
			if (event.detail == DND.DROP_DEFAULT) {
				event.detail = dropDefaultOperation;
			}
			event.feedback = dropFeedback;
		}
		public void dragOver(DropTargetEvent event) {
			dropConsole.append(">>dragOver\n");
			printEvent(event);
			event.feedback = dropFeedback;
		}
		public void drop(DropTargetEvent event) {
			dropConsole.append(">>drop\n");
			printEvent(event);
			String[] strings = null;
			if (TextTransfer.getInstance().isSupportedType(event.currentDataType) ||
			    RTFTransfer.getInstance().isSupportedType(event.currentDataType) ||
			    HTMLTransfer.getInstance().isSupportedType(event.currentDataType)) {
			    strings = new String[] {(String)event.data};
			}
			if (FileTransfer.getInstance().isSupportedType(event.currentDataType)) {
				strings = (String[])event.data;
			}
			if (strings == null || strings.length == 0) {
				dropConsole.append("!!Invalid data dropped");
				return;
			}