\helpref{wxTextDropTarget}{wxtextdroptarget},
\helpref{wxFileDropTarget}{wxfiledroptarget}
-It has to be noted that the API for drag and drop in wxWindows is not
-yet finished which is mostly due to the fact that DnD support under
-GTK 1.0 is very rudimentary and entirely different from the XDnD
-protocoll used by GTK 1.2. This also entails that not all of the documentation
-concerning DnD might be correct and some of the code might get broken
-in the future. The next release of wxWindows will be based on GTK 1.2
-and will hopefully include a much improved DnD support. The general
-design on the wxDropSource side will be the same but especially the
-wxDropTarget is almost certain to change.
-
Note that wxUSE\_DRAG\_AND\_DROP must be defined in setup.h in order
to use Drag'n'Drop in wxWindows.
\begin{verbatim}
wxDataObject *my_data = new wxTextDataObject data("This string will be dragged.");
\end{verbatim}
-
\item{\bf Drag start:} To start dragging process (typically in response to a
mouse click) you must call \helpref{DoDragDrop}{wxdropsourcedodragdrop} function
of wxDropSource object which should be constructed like this:
wxDropSource dragSource( this );
dragSource.SetData( my_data );
\end{verbatim}
-
\item {\bf Dragging:} The call to DoDragDrop() blocks until the user release the
mouse button (unless you override \helpref{GiveFeedback}{wxdropsourcegivefeedback} function
to do something special). When the mouse moves in a window of a program which understands the
-same drag-and-drop protocol (any program under Windows or any program supporting GTK 1.0
-DnD protocol under X Windows), the corresponding \helpref{wxDropTarget}{wxdroptarget} methods
+same drag-and-drop protocol (any program under Windows or any program supporting the
+XDnD protocol under X Windows), the corresponding \helpref{wxDropTarget}{wxdroptarget} methods
are called - see below.
-
\item {\bf Processing the result:} DoDragDrop() returns an {\it effect code} which
is one of the values of \helpref{wxDragResult}{wxdropsource} enum. Codes
of wxDragError, wxDragNone and wxDragCancel have the obvious meaning and mean
derive from \helpref{wxTextDropTarget}{wxtextdroptarget} or
\helpref{wxFileDropTarget}{wxfiledroptarget} and override their OnDropText()
or OnDropFiles() method.
-
\item {\bf Drop:} When the user releases the mouse over a window, wxWindows
-queries the associated wxDropTarget object if it accepts the data. For
-this, \helpref{GetFormatCount}{wxdroptargetgetformatcount} and \helpref{GetFormat}{wxdroptargetgetformat} are
-used and if the format is
-supported (i.e. is one of returned by GetFormat()),
-then \helpref{OnDrop}{wxdroptargetondrop} is called.
-Otherwise, wxDragNone is returned by DoDragDrop() and
-nothing happens.
-
+queries the associated wxDropTarget object if it accepts the data. For this,
+a \helpref{wxDataObject}{wxdataobject} must be associated with the drop target
+and this data object will be responsible for the format negotiation between
+the drag source and the drop target. If all goes well, then \helpref{OnData}{wxdroptargetondata}
+will get called and the wxDataObject belonging to the drop target can get
+filled with data.
\item {\bf The end:} After processing the data, DoDragDrop() returns either
wxDragCopy or wxDragMove depending on the state of the keys (<Ctrl>, <Shift>
and <Alt>) at the moment of drop. There is currently no way for the drop