public static void setDragDrop(final Text text) {
Transfer[] types = new Transfer[] {TextTransfer.getInstance()};
int operations = DND.DROP_MOVE | DND.DROP_COPY | DND.DROP_LINK;
final DragSource source = new DragSource(text, operations);
source.setTransfer(types);
source.addDragListener(
new DragSourceListener() {
Point selection;
@Override
public void dragStart(DragSourceEvent e) {
selection = text.getSelection();
e.doit = selection.x != selection.y;
}
@Override
public void dragSetData(DragSourceEvent e) {
e.data = text.getText(selection.x, selection.y - 1);
}
@Override
public void dragFinished(DragSourceEvent e) {
if (e.detail == DND.DROP_MOVE) {
text.setSelection(selection);
text.insert("");
}
selection = null;
}
});
DropTarget target = new DropTarget(text, operations);
target.setTransfer(types);
target.addDropListener(
new DropTargetAdapter() {
@Override
public void drop(DropTargetEvent event) {
if (event.data == null) {
event.detail = DND.DROP_NONE;
return;
}
text.append((String) event.data);
}
});
}
