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
});
	
	Button b = new Button(parent, SWT.CHECK);
	b.setText("RTF Transfer");
	b.addSelectionListener(new SelectionAdapter() {
		public void widgetSelected(SelectionEvent e) {
			Button b = (Button)e.widget;
			if (b.getSelection()) {
				addDragTransfer(RTFTransfer.getInstance());			
			} else {
				removeDragTransfer(RTFTransfer.getInstance());
			}
		}
	});
	
	b = new Button(parent, SWT.CHECK);
	b.setText("HTML Transfer");
	b.addSelectionListener(new SelectionAdapter() {
		public void widgetSelected(SelectionEvent e) {
			Button b = (Button)e.widget;
			if (b.getSelection()) {
				addDragTransfer(HTMLTransfer.getInstance());			
			} else {
				removeDragTransfer(HTMLTransfer.getInstance());
			}
		}
	});
	
	
	b = new Button(parent, SWT.CHECK);