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
dropFeedback &= ~DND.FEEDBACK_INSERT_AFTER;
			}
		}
	});
	
	b = new Button(parent, SWT.CHECK);
	b.setText("FEEDBACK_EXPAND");
	b.addSelectionListener(new SelectionAdapter() {
		public void widgetSelected(SelectionEvent e) {
			Button b = (Button)e.widget;
			if (b.getSelection()) {
				dropFeedback |= DND.FEEDBACK_EXPAND;			
			} else {
				dropFeedback &= ~DND.FEEDBACK_EXPAND;
			}
		}
	});
}
private void createDropTypes(Composite parent) {
	parent.setLayout(new RowLayout(SWT.VERTICAL));
	Button textButton = new Button(parent, SWT.CHECK);
	textButton.setText("Text Transfer");
	textButton.addSelectionListener(new SelectionAdapter() {
		public void widgetSelected(SelectionEvent e) {
			Button b = (Button)e.widget;
			if (b.getSelection()) {
				addDropTransfer(TextTransfer.getInstance());			
			} else {
				removeDropTransfer(TextTransfer.getInstance());
			}