Class ResourceTransfer
ResourceTransfer
class is used to transfer an array of
IResource
s from one part to another in a drag and drop operation
or a cut, copy, paste action.
In every drag and drop operation there is a DragSource
and a
DropTarget
. When a drag occurs a Transfer
is used
to marshal the drag data from the source into a byte array. If a drop occurs
another Transfer
is used to marshal the byte array into drop
data for the target.
When a CutAction
or a CopyAction
is performed, this
transfer is used to place references to the selected resources on the
Clipboard
. When a PasteAction
is performed, the
references on the clipboard are used to move or copy the resources to the
selected destination.
This class can be used for a Viewer
or an SWT component
directly. A singleton is provided which may be serially reused (see
getInstance
). It is not intended to be subclassed.
The amount of resources which can be transferred is limited to
MAX_RESOURCES_TO_TRANSFER
elements.
- See Also:
- Restriction:
- This class is not intended to be subclassed by clients.
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Method Summary
Modifier and TypeMethodDescriptionstatic ResourceTransfer
Returns the singleton instance.protected int[]
Returns the platform specific ids of the data types that can be converted using this transfer agent.protected String[]
Returns the platform specific names of the data types that can be converted using this transfer agent.protected void
javaToNative
(Object data, TransferData transferData) This implementation ofjavaToNative
converts a javabyte[]
to a platform specific representation.protected Object
nativeToJava
(TransferData transferData) This implementation ofnativeToJava
converts a platform specific representation of a byte array to a javabyte[]
.Methods inherited from class org.eclipse.swt.dnd.ByteArrayTransfer
getSupportedTypes, isSupportedType
Methods inherited from class org.eclipse.swt.dnd.Transfer
registerType, validate
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Method Details
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getInstance
Returns the singleton instance.- Returns:
- the singleton instance
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getTypeIds
protected int[] getTypeIds()Description copied from class:Transfer
Returns the platform specific ids of the data types that can be converted using this transfer agent.- Specified by:
getTypeIds
in classTransfer
- Returns:
- the platform specific ids of the data types that can be converted using this transfer agent
-
getTypeNames
Description copied from class:Transfer
Returns the platform specific names of the data types that can be converted using this transfer agent.- Specified by:
getTypeNames
in classTransfer
- Returns:
- the platform specific names of the data types that can be converted using this transfer agent.
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javaToNative
Description copied from class:ByteArrayTransfer
This implementation ofjavaToNative
converts a javabyte[]
to a platform specific representation.- Overrides:
javaToNative
in classByteArrayTransfer
- Parameters:
data
- a javabyte[]
containing the data to be convertedtransferData
- an emptyTransferData
object that will be filled in on return with the platform specific format of the data- See Also:
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nativeToJava
Description copied from class:ByteArrayTransfer
This implementation ofnativeToJava
converts a platform specific representation of a byte array to a javabyte[]
.- Overrides:
nativeToJava
in classByteArrayTransfer
- Parameters:
transferData
- the platform specific representation of the data to be converted- Returns:
- a java
byte[]
containing the converted data if the conversion was successful; otherwise null - See Also:
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