/**
* @param actor is being dragged.
* @param dragPane is under the actor. Stores a {@link GridGroup} or unknown group.
* @param directPaneChild actor under the cursor.
* @return true if actor was accepted by the group.
*/
protected boolean addToOtherGroup(
final Actor actor, final DragPane dragPane, final Actor directPaneChild) {
final Array<Actor> children = dragPane.getChildren();
final int indexOfDirectChild = children.indexOf(directPaneChild, true);
final int indexOfDraggedActor = children.indexOf(actor, true);
if (indexOfDraggedActor >= 0) { // Dragging own actor.
if (indexOfDraggedActor > indexOfDirectChild) { // Dropped after current position.
dragPane.addActorBefore(directPaneChild, actor);
} else { // Dropped before current position.
dragPane.addActorAfter(directPaneChild, actor);
}
} else if (indexOfDirectChild == children.size - 1) { // Dragged into last element.
if (DRAG_POSITION.y < directPaneChild.getHeight() / 2f
|| DRAG_POSITION.x > directPaneChild.getWidth() / 2f) {
// Adding last: // last:
dragPane.addActor(actor);
} else {
dragPane.addActorBefore(directPaneChild, actor);
}
} else if (indexOfDirectChild == 0) { // Dragged into first element.
if (DRAG_POSITION.y < directPaneChild.getHeight() / 2f
|| DRAG_POSITION.x > directPaneChild.getWidth() / 2f) {
dragPane.addActorAfter(directPaneChild, actor);
} else { // Adding first:
dragPane.addActorBefore(directPaneChild, actor);
}
} else { // Replacing hovered actor:
dragPane.addActorBefore(directPaneChild, actor);
}
return APPROVE;
}
/**
* @param draggable is attached to the actor.
* @param actor dragged actor.
* @param dragPane is directly under the dragged actor. If accepts the actor, it should be added
* to its content.
* @return true if actor was accepted.
*/
protected boolean addDirectlyToPane(
final Draggable draggable, final Actor actor, final DragPane dragPane) {
if (accept(actor, dragPane)) {
if (dragPane.isFloating()) {
return addToFloatingGroup(draggable, actor, dragPane);
}
// Dragged directly to a pane. Assuming no padding, adding last:
dragPane.addActor(actor);
return APPROVE;
}
return CANCEL;
}