- java.lang.Object
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- java.util.EventObject
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- java.awt.dnd.DropTargetEvent
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- java.awt.dnd.DropTargetDragEvent
 
 
 
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- All Implemented Interfaces:
- Serializable
 
 public class DropTargetDragEvent extends DropTargetEvent TheDropTargetDragEventis delivered to aDropTargetListenervia its dragEnter() and dragOver() methods.The DropTargetDragEventreports the source drop actions and the user drop action that reflect the current state of the drag operation.Source drop actions is a bitwise mask of DnDConstantsthat represents the set of drop actions supported by the drag source for this drag operation.User drop action depends on the drop actions supported by the drag source and the drop action selected by the user. The user can select a drop action by pressing modifier keys during the drag operation: Ctrl + Shift -> ACTION_LINK Ctrl -> ACTION_COPY Shift -> ACTION_MOVE If the user selects a drop action, the user drop action is one ofDnDConstantsthat represents the selected drop action if this drop action is supported by the drag source orDnDConstants.ACTION_NONEif this drop action is not supported by the drag source.If the user doesn't select a drop action, the set of DnDConstantsthat represents the set of drop actions supported by the drag source is searched forDnDConstants.ACTION_MOVE, then forDnDConstants.ACTION_COPY, then forDnDConstants.ACTION_LINKand the user drop action is the first constant found. If no constant is found the user drop action isDnDConstants.ACTION_NONE.- Since:
- 1.2
- See Also:
- Serialized Form
 
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Field Summary- 
Fields declared in class java.awt.dnd.DropTargetEventcontext
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Fields declared in class java.util.EventObjectsource
 
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Constructor SummaryConstructors Constructor Description DropTargetDragEvent(DropTargetContext dtc, Point cursorLocn, int dropAction, int srcActions)Construct aDropTargetDragEventgiven theDropTargetContextfor this operation, the location of the "Drag"Cursor's hotspot in theComponent's coordinates, the user drop action, and the source drop actions.
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Method SummaryAll Methods Instance Methods Concrete Methods Modifier and Type Method Description voidacceptDrag(int dragOperation)Accepts the drag.DataFlavor[]getCurrentDataFlavors()This method returns the currentDataFlavors from theDropTargetContext.List<DataFlavor>getCurrentDataFlavorsAsList()This method returns the currentDataFlavors as ajava.util.ListintgetDropAction()This method returns the user drop action.PointgetLocation()This method returns aPointindicating theCursor's current location within theComponent's coordinates.intgetSourceActions()This method returns the source drop actions.TransferablegetTransferable()This method returns the Transferable object that represents the data associated with the current drag operation.booleanisDataFlavorSupported(DataFlavor df)This method returns abooleanindicating if the specifiedDataFlavoris supported.voidrejectDrag()Rejects the drag as a result of examining either thedropActionor the availableDataFlavortypes.- 
Methods declared in class java.awt.dnd.DropTargetEventgetDropTargetContext
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Methods declared in class java.util.EventObjectgetSource, toString
 
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Constructor Detail- 
DropTargetDragEventpublic DropTargetDragEvent(DropTargetContext dtc, Point cursorLocn, int dropAction, int srcActions) Construct aDropTargetDragEventgiven theDropTargetContextfor this operation, the location of the "Drag"Cursor's hotspot in theComponent's coordinates, the user drop action, and the source drop actions.- Parameters:
- dtc- The DropTargetContext for this operation
- cursorLocn- The location of the "Drag" Cursor's hotspot in Component coordinates
- dropAction- The user drop action
- srcActions- The source drop actions
- Throws:
- NullPointerException- if cursorLocn is null
- IllegalArgumentException- if dropAction is not one of- DnDConstants.
- IllegalArgumentException- if srcActions is not a bitwise mask of- DnDConstants.
- IllegalArgumentException- if dtc is- null.
 
 
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Method Detail- 
getLocationpublic Point getLocation() This method returns aPointindicating theCursor's current location within theComponent's coordinates.- Returns:
- the current cursor location in
 Component's coords.
 
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getCurrentDataFlavorspublic DataFlavor[] getCurrentDataFlavors() This method returns the currentDataFlavors from theDropTargetContext.- Returns:
- current DataFlavors from the DropTargetContext
 
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getCurrentDataFlavorsAsListpublic List<DataFlavor> getCurrentDataFlavorsAsList() This method returns the currentDataFlavors as ajava.util.List- Returns:
- a java.util.Listof the CurrentDataFlavors
 
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isDataFlavorSupportedpublic boolean isDataFlavorSupported(DataFlavor df) This method returns abooleanindicating if the specifiedDataFlavoris supported.- Parameters:
- df- the- DataFlavorto test
- Returns:
- if a particular DataFlavor is supported
 
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getSourceActionspublic int getSourceActions() This method returns the source drop actions.- Returns:
- the source drop actions
 
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getDropActionpublic int getDropAction() This method returns the user drop action.- Returns:
- the user drop action
 
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getTransferablepublic Transferable getTransferable() This method returns the Transferable object that represents the data associated with the current drag operation.- Returns:
- the Transferable associated with the drag operation
- Throws:
- InvalidDnDOperationException- if the data associated with the drag operation is not available
- Since:
- 1.5
 
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acceptDragpublic void acceptDrag(int dragOperation) Accepts the drag. This method should be called from aDropTargetListeners dragEnter,dragOver, anddropActionChangedmethods if the implementation wishes to accept an operation from the srcActions other than the one selected by the user as represented by thedropAction.- Parameters:
- dragOperation- the operation accepted by the target
 
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rejectDragpublic void rejectDrag() Rejects the drag as a result of examining either thedropActionor the availableDataFlavortypes.
 
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