@Override
public void accept(final VDragEvent drag, UIDL configuration, final VAcceptCallback callback) {
if (lastDragEvent == null || lastDragEvent != drag) {
loaded = false;
lastDragEvent = drag;
}
if (loaded) {
Object object = drag.getDropDetails().get("itemIdOver");
if (hashSet.contains(object)) {
callback.accepted(drag);
}
} else {
VDragEventServerCallback acceptCallback =
new VDragEventServerCallback() {
@Override
public void handleResponse(boolean accepted, UIDL response) {
hashSet = new HashSet<String>();
String[] stringArrayAttribute = response.getStringArrayAttribute("allowedIds");
for (int i = 0; i < stringArrayAttribute.length; i++) {
hashSet.add(stringArrayAttribute[i]);
}
loaded = true;
if (accepted) {
callback.accepted(drag);
}
}
};
VDragAndDropManager.get().visitServer(acceptCallback);
}
}
/**
* @return the current Element used as a drag image (aka drag proxy) or null if drag image is not
* currently set for this drag operation.
*/
public com.google.gwt.user.client.Element getDragImage() {
return DOM.asOld(VDragAndDropManager.get().getDragElement());
}
/**
* Sets the drag image used for current drag and drop operation. Drag image is displayed next to
* mouse cursor during drag and drop.
*
* <p>The element to be used as drag image will automatically get CSS style name "v-drag-element".
*
* @param element the dom element to be positioned next to mouse cursor
* @param offsetX the horizontal offset of drag image from mouse cursor
* @param offsetY the vertical offset of drag image from mouse cursor
* @deprecated As of 7.2, call or override {@link #setDragImage(Element,int,int)} instead
*/
@Deprecated
public void setDragImage(com.google.gwt.user.client.Element element, int offsetX, int offsetY) {
element.getStyle().setMarginLeft(offsetX, Unit.PX);
element.getStyle().setMarginTop(offsetY, Unit.PX);
VDragAndDropManager.get().setDragElement(element);
}
