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Next: 3. Drag & Drop Up: 2. Protocol Basics Previous: 1. Drag Operation Modes   Contents   Index

2. Protocol Messages

XClientMessageEventUnfortunately, X client messages (of type XClientMessageEvent) are limited in size: you can only transfer up to 20 bytes within them. For this reason, M*TIF applications use a ``drag window'' with special properties attached to it to transfer any additional information which uses up to much space. Some of the protocol messages therefore just refer to a data structure stored with the drag window.

_MOTIF_DRAG_AND_DROP_MESSAGEThe various X client messages used for the drag or drop protocol share a common header and some common settings.
% latex2html id marker 3177\item The \code{message\_type} of ...
contain the remaining bytes of the drag and drop message.

Danny Backx