public class AbsolutePositionDropController extends AbstractPositioningDropController
DropController
which allows a draggable widget to be placed at specific (absolute)
locations on an AbsolutePanel
drop target.Constructor and Description |
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AbsolutePositionDropController(com.google.gwt.user.client.ui.AbsolutePanel dropTarget)
Basic constructor.
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Modifier and Type | Method and Description |
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void |
drop(com.google.gwt.user.client.ui.Widget widget,
int left,
int top)
Programmatically drop a widget on our drop target while obeying the constraints of this
controller.
|
void |
onDrop(DragContext context)
Called when the draggable widget or its proxy is dropped on our drop target.
|
void |
onEnter(DragContext context)
Called when the draggable widget or its proxy engages our drop target.
|
void |
onLeave(DragContext context)
Called when the reference widget stops engaging our drop target by leaving the area of the page
occupied by our drop target, or after
DropController.onDrop(DragContext) to allow for any cleanup. |
void |
onMove(DragContext context)
Called with each mouse movement while the reference widget is engaging our drop target.
|
getDropTarget, onPreviewDrop
public AbsolutePositionDropController(com.google.gwt.user.client.ui.AbsolutePanel dropTarget)
dropTarget
- the absolute panel drop targetpublic void drop(com.google.gwt.user.client.ui.Widget widget, int left, int top)
widget
- the widget to be droppedleft
- the desired absolute horizontal location relative to our drop targettop
- the desired absolute vertical location relative to our drop targetpublic void onDrop(DragContext context)
DropController
onDrop
in interface DropController
onDrop
in class AbstractDropController
context
- the current drag contextDropController.onPreviewDrop(DragContext)
public void onEnter(DragContext context)
DropController
onEnter
in interface DropController
onEnter
in class AbstractDropController
context
- the current drag contextDropController.onLeave(DragContext)
public void onLeave(DragContext context)
DropController
DropController.onDrop(DragContext)
to allow for any cleanup.onLeave
in interface DropController
onLeave
in class AbstractDropController
context
- the current drag contextDropController.onEnter(DragContext)
public void onMove(DragContext context)
DropController
DropController.onEnter(DragContext)
is called before this method is called.onMove
in interface DropController
onMove
in class AbstractDropController
context
- the current drag contextDropController.onEnter(DragContext)
,
DropController.onLeave(DragContext)