com.allen_sauer.gwt.dnd.client.drop

Class GridConstrainedDropController

java.lang.Object

com.allen_sauer.gwt.dnd.client.drop.AbstractDropController

com.allen_sauer.gwt.dnd.client.drop.AbstractPositioningDropController

com.allen_sauer.gwt.dnd.client.drop.AbsolutePositionDropController

com.allen_sauer.gwt.dnd.client.drop.GridConstrainedDropController

All Implemented Interfaces:

DropController

public class GridConstrainedDropController
extends AbsolutePositionDropController

A DropController which constrains the placement of draggable widgets the grid specified in the constructor.

Constructor Summary

Constructors

Constructor and Description
GridConstrainedDropController(com.google.gwt.user.client.ui.AbsolutePanel dropTarget, int gridX, int gridY)

Method Summary

Methods

Modifier and Type	Method and Description
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	onMove(DragContext context) Called with each mouse movement while the reference widget is engaging our drop target.

Methods inherited from class com.allen_sauer.gwt.dnd.client.drop.AbsolutePositionDropController

onDrop, onEnter, onLeave

Methods inherited from class com.allen_sauer.gwt.dnd.client.drop.AbstractDropController

getDropTarget, onPreviewDrop

Methods inherited from class java.lang.Object

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

Constructor Detail

GridConstrainedDropController

public GridConstrainedDropController(com.google.gwt.user.client.ui.AbsolutePanel dropTarget,
                             int gridX,
                             int gridY)

Method Detail

drop

public void drop(com.google.gwt.user.client.ui.Widget widget,
        int left,
        int top)

Description copied from class: AbsolutePositionDropController

Programmatically drop a widget on our drop target while obeying the constraints of this controller.

Overrides:

drop in class AbsolutePositionDropController

Parameters:

widget - the widget to be dropped

left - the desired absolute horizontal location relative to our drop target

top - the desired absolute vertical location relative to our drop target

onMove

public void onMove(DragContext context)

Description copied from interface: DropController

Called with each mouse movement while the reference widget is engaging our drop target. DropController.onEnter(DragContext) is called before this method is called.

Specified by:

onMove in interface DropController

Overrides:

onMove in class AbsolutePositionDropController

Parameters:

context - the current drag context

See Also:

DropController.onEnter(DragContext), DropController.onLeave(DragContext)