The DropTargetDragEvent is delivered to a
DropTargetListener via its
dragEnter() and dragOver() methods.
The DropTargetDragEvent reports the source drop actions
and the user drop action that reflect the current state of
the drag operation.
Source drop actions is a bitwise mask of DnDConstants
that represents the set of drop actions supported by the drag source for
this drag operation.
User drop action depends on the drop actions supported by the drag
source and the drop action selected by the user. The user can select a drop
action by pressing modifier keys during the drag operation:
Ctrl + Shift -> ACTION_LINK
Ctrl -> ACTION_COPY
Shift -> ACTION_MOVE
If the user selects a drop action, the user drop action is one of
DnDConstants that represents the selected drop action if this
drop action is supported by the drag source or
DnDConstants.ACTION_NONE if this drop action is not supported
by the drag source.
If the user doesn't select a drop action, the set of
DnDConstants that represents the set of drop actions supported
by the drag source is searched for DnDConstants.ACTION_MOVE,
then for DnDConstants.ACTION_COPY, then for
DnDConstants.ACTION_LINK and the user drop action is the
first constant found. If no constant is found the user drop action
is DnDConstants.ACTION_NONE.
version:
1.31, 05/05/07
since:
1.2 | 