Drop target interface. More...

#include <dragging.h>

Inheritance diagram for IDropTarget:

Public Member Functions
virtual DragOperation	onDragEnter (DragEventData data)=0
	a drag enters the drop target More...

virtual DragOperation	onDragMove (DragEventData data)=0
	a drag moves over the drop target More...

virtual void	onDragLeave (DragEventData data)=0
	a drag leaves the drop target More...

virtual bool	onDrop (DragEventData data)=0
	a drop happens on the drop target More...

Public Member Functions inherited from IReference
virtual void	forget ()=0
	decrease refcount and delete object if refcount == 0 More...

virtual void	remember ()=0
	increase refcount More...

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

virtual void onDragLeave ( DragEventData data )

pure virtual

a drag leaves the drop target

Parameters

data	drag event data

virtual DragOperation onDragMove ( DragEventData data )

pure virtual

a drag moves over the drop target

Parameters

data	drag event data

virtual bool onDrop ( DragEventData data )

pure virtual

a drop happens on the drop target

Parameters

data	drag event data

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