org.nakedobjects.plugins.dnd
Class ViewDrag

java.lang.Object
  org.nakedobjects.plugins.dnd.PointerEvent
      org.nakedobjects.plugins.dnd.Drag
          org.nakedobjects.plugins.dnd.ViewDrag

public class ViewDrag
extends Drag

Details a drag event that affects a view. The target of a ViewDrag is always the workspace of the source view.

An overlay view, as returned by the pickup() method on the source view, is moved by this drag objects so its location follows the pointer by an offset equivalent to the mouse location within the view.

Field Summary

Fields inherited from class org.nakedobjects.plugins.dnd.PointerEvent

mods

Constructor Summary

ViewDrag(View view, Offset offset, View dragView)
Creates a new drag event.

Method Summary

void	cancel(Viewer viewer) Cancel drag by changing cursor back to pointer.
protected void	drag(Viewer viewer) Moves the overlay view so it follows the pointer
void	drag(View target, Location location, int mods) Indicates that the drag state has changed.
void	end(Viewer viewer) Ends the drag by calling drop() on the workspace.
Location	getLocation()
View	getOverlay()
View	getSourceView()
Location	getViewDropLocation()
void	subtract(int x, int y)
void	subtract(Location location)
java.lang.String	toString()

Methods inherited from class org.nakedobjects.plugins.dnd.PointerEvent

button1, button2, button3, isAlt, isCtrl, isMeta, isShift

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

ViewDrag

public ViewDrag(View view,
                Offset offset,
                View dragView)

Creates a new drag event. The source view has its pickup(), and then, exited() methods called on it. The view returned by the pickup method becomes this event overlay view, which is moved continuously so that it tracks the pointer.

Parameters:

view - the view over which the pointer was when this event started

Method Detail

cancel

public void cancel(Viewer viewer)

Cancel drag by changing cursor back to pointer.

Specified by:

cancel in class Drag

drag

protected void drag(Viewer viewer)

Moves the overlay view so it follows the pointer

drag

public void drag(View target,
                 Location location,
                 int mods)

Description copied from class: Drag

Indicates that the drag state has changed.

Specified by:

drag in class Drag

end

public void end(Viewer viewer)

Ends the drag by calling drop() on the workspace.

Specified by:

end in class Drag

getOverlay

public View getOverlay()

Specified by:

getOverlay in class Drag

getLocation

public Location getLocation()

getSourceView

public View getSourceView()

getViewDropLocation

public Location getViewDropLocation()

subtract

public void subtract(Location location)

toString

public java.lang.String toString()

Overrides:

toString in class PointerEvent

subtract

public void subtract(int x,
                     int y)