My seqnums are persistently stored,
when items are retrieved so the seqnum.
I used models to pass and get item data:
@Override
public void populateItem(final Item<ItemData> item) {
final ItemData itemData = item.getModelObject();
item.add(new MyLink("title", new DraggableModel<ItemData>(itemData) {
@Override
public String getObject() {
return itemData.getTitle();
}
@Override
public DraggableModel<?> onDrop(AjaxRequestTarget target,
DroppableModel<?> droppableModel) {
// check where the item was dropped (my items can be dropped in
more containers)
if (droppableModel.getType() == Droppable.RESEQUENCER) {
// clip D&D-ed into clip seqnum updater
Integer newSeqnum = (Integer) (droppableModel.getMobject());
if (newSeqnum.equals(itemData.getSeqnum())) {
return null;
}
// update your data in persistent store
return null;
} // else (if any)
}
}
add(new DraggableBehavior() {
{
setName(Draggable.PRODUCT.name());
setRevert(DraggableBehavior.DragRevertMode.ALWAYS);
setRevertDuration(0);
setHelper(DragHelperMode.CLONE);
setOpacity(Opacity.LOW);
}
});
add(new DroppableBehavior() {
{
setHoverClass("resequencerHover");
setTolerance(DropTolerance.POINTER);
setDraggablesAcceptedByDroppable(new
DraggablesAcceptedByDroppable(Draggable.PRODUCT.name()));
}
@Override
protected void onDrop(AjaxRequestTarget target, final Component
component, final SpecialKeys keys) {
DraggableModel<ItemData> model = (DraggableModel<ItemData>)
component.getDefaultModel();
// the container invokes the onDrop() callback of item, passing
container's data, so that
// the item can figure out where was dropped
model.onDrop(target, new
DroppableModel<Integer>(Droppable.RESEQUENCER, itemData.getSeqnum()));
}
});
add(new AttributeAppender("class", true, new
AbstractReadOnlyModel<String>() {
@Override
public String getObject() {
return "resequencer";
}
}, " "));
}
public abstract class DraggableModel<T> extends
AbstractReadOnlyModel<String> {
protected Draggable type;
protected T mobject;
public DraggableModel(Draggable type) {
this.type = type;
}
public DraggableModel(T object) {
this.mobject = object;
}
public DraggableModel(Draggable type, T object) {
this.type = type;
this.mobject = object;
}
public final T getMobject() {
return mobject;
}
public Draggable getType() {
return type;
}
@Override
public String getObject() {
return null;
}
/**
* Callback, invoked by 'droppable' when it accepts this draggable.
* Implementers should call droppable's onDrop() if droppable is not
null.
* @param target
* @param droppableModel
* @return
*/
public abstract DraggableModel<?> onDrop(AjaxRequestTarget target,
DroppableModel<?> droppableModel);
}
public class DroppableModel<T> extends AbstractReadOnlyModel<String> {
protected Droppable type;
protected T mobject;
public DroppableModel(Droppable type) {
this.type = type;
}
public DroppableModel(T object) {
this.mobject = object;
}
public DroppableModel(Droppable type, T object) {
this.type = type;
this.mobject = object;
}
public DroppableModel() {
throw new UnsupportedOperationException("Type required");
}
public final T getMobject() {
return mobject;
}
public Droppable getType() {
return type;
}
@Override
public String getObject() {
return null;
}
/**
* Callback, invoked by 'draggable' after this droppable invoked
draggable's onDrop().
* Implementers should call draggable's onDrop() if draggable is not
null.
* @param target
* @param draggableModel
* @return
*/
public DroppableModel<?> onDrop(AjaxRequestTarget target,
DraggableModel<?> draggableModel) {
return null;
}
}
public enum Droppable {
TRASH, RESEQUENCER /* etc */;
}
public enum Draggable {
PRODUCT, USER /* etc */;
}
Hoping that copy&paste&adjustments are OK,
Istvan
On Mon, Jun 7, 2010 at 3:02 PM, DerBernd <beha...@web.de> wrote:
>
> Ok,
> I think I understood, but how do you get the seqnum?
> --
> View this message in context:
> http://apache-wicket.1842946.n4.nabble.com/drag-and-drop-tp1881857p2245847.html
> Sent from the Wicket - User mailing list archive at Nabble.com.
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: users-unsubscr...@wicket.apache.org
> For additional commands, e-mail: users-h...@wicket.apache.org
>
>
