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

called before the drop target or widget changed,
and also when the view announces that it will change the contents
(eg. due to an autoscroll).
Restores the old contents from the saveArea

 flushSaveArea

 postDragging

restore from saveUnder for a generic opaque drag

 preDraggingIn: aSourceWidget

setup my default values

 rereadSaveArea

 restoreFromSaveArea

(comment from inherited method)
D372428 - Drag and drop: falsches Redraw