package bndtools.utils;
import org.eclipse.jface.util.LocalSelectionTransfer;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.Viewer;
import org.eclipse.swt.dnd.DragSourceEvent;
import org.eclipse.swt.dnd.DragSourceListener;
public class SelectionDragAdapter implements DragSourceListener {
private final Viewer viewer;
public SelectionDragAdapter(Viewer viewer) {
this.viewer = viewer;
}
public void dragStart(DragSourceEvent event) {
ISelection selection = viewer.getSelection();
LocalSelectionTransfer.getTransfer().setSelection(selection);
LocalSelectionTransfer.getTransfer().setSelectionSetTime(event.time & 0xFFFFFFFFL);
event.doit = !selection.isEmpty();
}
public void dragSetData(DragSourceEvent event) {
// For consistency set the data to the selection even though
// the selection is provided by the LocalSelectionTransfer
// to the drop target adapter.
event.data = LocalSelectionTransfer.getTransfer().getSelection();
}
public void dragFinished(DragSourceEvent event) {
LocalSelectionTransfer.getTransfer().setSelection(null);
LocalSelectionTransfer.getTransfer().setSelectionSetTime(0);
}
}