IDropTarget Class Reference

Drop target interface. More...

Inheritance diagram for IDropTarget:

Public Member Functions
virtual DragOperation	onDragEnter (DragEventData data)=0
	a drag enters the drop target
virtual DragOperation	onDragMove (DragEventData data)=0
	a drag moves over the drop target
virtual void	onDragLeave (DragEventData data)=0
	a drag leaves the drop target
virtual bool	onDrop (DragEventData data)=0
	a drop happens on the drop target
Public Member Functions inherited from IReference
virtual void	forget ()=0
	decrease refcount and delete object if refcount == 0
virtual void	remember ()=0
	increase refcount

Detailed Description

Drop target interface.

handles drag'n drop for a view

The workflow is:

• drag enters a view, the getDropTarget() of the view is called

• the drop targets onDragEnter() is called

• the drop targets onDragMove() is called whenever the mouse moves inside the view

• when the mouse leaves the view, the drop targets onDragLeave() is called and its reference count is decreased.

• when the drag is droped, the drop targets onDrop() is called and then its reference count is decreased. Note that no onDragLeave() is called.

Member Function Documentation

virtual DragOperation onDragEnter ( DragEventData  data )

pure virtual

a drag enters the drop target

Parameters

data	drag event data

Returns

drag operation

Implemented in DropTargetAdapter, and CViewContainerDropTarget.

virtual void onDragLeave ( DragEventData  data )

pure virtual

a drag leaves the drop target

Parameters

data	drag event data

Implemented in DropTargetAdapter, and CViewContainerDropTarget.

virtual DragOperation onDragMove ( DragEventData  data )

pure virtual

a drag moves over the drop target

Parameters

data	drag event data

Returns

drag operation

Implemented in DropTargetAdapter, and CViewContainerDropTarget.

virtual bool onDrop ( DragEventData  data )

pure virtual

a drop happens on the drop target

Parameters

data	drag event data

Implemented in DropTargetAdapter, and CViewContainerDropTarget.

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The documentation for this class was generated from the following file:

• dragging.h