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org.eclipse.swt.dnd
Class DropTargetEffect
java.lang.Object
org.eclipse.swt.dnd.DropTargetAdapter
org.eclipse.swt.dnd.DropTargetEffect
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All Implemented Interfaces:
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EventListener,
DropTargetListener, org.eclipse.swt.internal.SWTEventListener
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Direct Known Subclasses:
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StyledTextDropTargetEffect,
TableDropTargetEffect,
TreeDropTargetEffect
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public class DropTargetEffect
- extends
DropTargetAdapter
This class provides a default drag under effect during a drag and drop.
The current implementation does not provide any visual feedback.
The drop target effect has the same API as the
DropTargetAdapter so that it can provide custom visual
feedback when a DropTargetEvent occurs.
Classes that wish to provide their own drag under effect
can extend the DropTargetEffect and override any applicable methods
in DropTargetAdapter to display their own drag under effect.
The feedback value is either one of the FEEDBACK constants defined in
class DND which is applicable to instances of this class,
or it must be built by bitwise OR'ing together
(that is, using the int "|" operator) two or more
of those DND effect constants.
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Feedback:
- FEEDBACK_EXPAND, FEEDBACK_INSERT_AFTER, FEEDBACK_INSERT_BEFORE,
FEEDBACK_NONE, FEEDBACK_SELECT, FEEDBACK_SCROLL
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Since:
- 3.3
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See Also:
-
DropTargetAdapter ,
DropTargetEvent ,
Sample code and further information
Constructor Summary
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DropTargetEffect
(
Control control)
Creates a new DropTargetEffect to handle the drag under effect on the specified
Control . |
Method Summary
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Control
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getControl
()
Returns the Control which is registered for this DropTargetEffect. |
Widget
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getItem
(int x,
int y)
Returns the item at the given x-y coordinate in the receiver
or null if no such item exists. |
Methods inherited from class java.lang.
Object
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clone,
equals,
finalize,
getClass,
hashCode,
notify,
notifyAll,
toString,
wait,
wait,
wait
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DropTargetEffect
public DropTargetEffect(
Control control)
- Creates a new
DropTargetEffect to handle the drag under effect on the specified
Control .
-
Parameters:
-
control - the Control over which the user positions the cursor to drop the data
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Throws:
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IllegalArgumentException
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- ERROR_NULL_ARGUMENT - if the control is null
getControl
public
Control getControl()
- Returns the Control which is registered for this DropTargetEffect. This is the control over which the
user positions the cursor to drop the data.
-
-
Returns:
- the Control which is registered for this DropTargetEffect
getItem
public
Widget getItem(int x,
int y)
- Returns the item at the given x-y coordinate in the receiver
or null if no such item exists. The x-y coordinate is in the
display relative coordinates.
-
-
Parameters:
-
x - the x coordinate used to locate the item -
y - the y coordinate used to locate the item
-
Returns:
- the item at the given x-y coordinate, or null if the coordinate is not in a selectable item
Guidelines for using Eclipse APIs.
Copyright (c) Eclipse contributors and others 2000, 2008. All rights reserved.
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