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
data.bottom = new FormAttachment(combo, -10);
	data.left = new FormAttachment(0, 10);
	data.right = new FormAttachment(100, -10);
	dropControl.setLayoutData(data);
	
	data = new FormData();
	data.bottom = new FormAttachment(100, -10);
	data.left = new FormAttachment(0, 10);
	combo.setLayoutData(data);
	
	data = new FormData();
	data.bottom = new FormAttachment(100, -10);
	data.left = new FormAttachment(combo, 10);
	b.setLayoutData(data);
}
private Control createWidget(int type, Composite parent, String prefix){
	switch (type) {
		case BUTTON_CHECK: {
			Button button = new Button(parent, SWT.CHECK);
			button.setText(prefix+" Check box");
			return button;
		}
		case BUTTON_TOGGLE: {
			Button button = new Button(parent, SWT.TOGGLE);
			button.setText(prefix+" Toggle button");
			return button;
		}
		case BUTTON_RADIO: {
			Button button = new Button(parent, SWT.RADIO);
			button.setText(prefix+" Radio button");