Class: Opaque (private in DragHandler

• Inheritance
• Description
• Related information
• Class protocol
  • constants
• Instance protocol
  • instance creation
  • protocol

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:

 additionalSaveSize

Instance protocol:

 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.

 dragTo: aRootPoint

drag to a root point

 dropTargetWillChange

restore old saveArea

 flushSaveArea

 postDragging

restore from saveUnder for a generic opaque drag

 preDraggingIn: aSourceWidget

setup my default values

 rereadSaveArea

 restoreFromSaveArea