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Documentation of class 'DragHandler::Opaque':

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Class: Opaque (private in DragHandler

This class is only visible from within DragHandler.

Inheritance:

   Object
   |
   +--DragHandler
      |
      +--DragHandler::Opaque

Package:
stx:libview2
Category:
Interface-DragAndDrop
Owner:
DragHandler
Author:
Claus Gittinger

Description:


this class handles an generic opaque drag on the screen. It is not visible
to the user and is created automatically by the DragAndDropManger.


Related information:

    DragAndDropManager

Class protocol:

constants
o  additionalSaveSize


Instance protocol:

instance creation
o  dragSize: anExtent dragOffset: anOffset dragBlock: aTwoArgBlock
the dragBlock will be called with two arguments, aPoint and the drawing GC,
to perform the drawing at some dragPoint.

protocol
o  dragTo: aRootPoint
drag to a root point

o  dropTargetWillChange
restore old saveArea

o  flushSaveArea

o  postDragging
restore from saveUnder for a generic opaque drag

o  preDraggingIn: aSourceWidget
setup my default values

o  rereadSaveArea

o  restoreFromSaveArea



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