org.eclipse.swt.dnd

Class ImageTransfer

java.lang.Object

org.eclipse.swt.dnd.Transfer

org.eclipse.swt.dnd.ByteArrayTransfer

org.eclipse.swt.dnd.ImageTransfer

public class ImageTransfer
extends ByteArrayTransfer

The class ImageTransfer provides a platform specific mechanism for converting an Image represented as a java ImageData to a platform specific representation of the data and vice versa.

An example of a java ImageData is shown below:

     Image image = new Image(display, "C:\temp\img1.gif");
           ImageData imgData = image.getImageData();
 

Since:

3.4

See Also:

Transfer

Structure Diagram

Field Summary

Fields

Modifier and Type	Field and Description
private static ImageTransfer	_instance
private static java.lang.String	CF_DIB
private static int	CF_DIBID

Constructor Summary

Constructors

Modifier	Constructor and Description
private	ImageTransfer()

Method Summary

Methods

Modifier and Type	Method and Description
(package private) boolean	checkImage(java.lang.Object object)
static ImageTransfer	getInstance() Returns the singleton instance of the ImageTransfer class.
protected int[]	getTypeIds() Returns the platform specific ids of the data types that can be converted using this transfer agent.
protected java.lang.String[]	getTypeNames() Returns the platform specific names of the data types that can be converted using this transfer agent.
void	javaToNative(java.lang.Object object, TransferData transferData) This implementation of javaToNative converts an ImageData object represented by java ImageData to a platform specific representation.
java.lang.Object	nativeToJava(TransferData transferData) This implementation of nativeToJava converts a platform specific representation of an image to java ImageData.
protected boolean	validate(java.lang.Object object) Test that the object is of the correct format for this Transfer class.

Methods inherited from class org.eclipse.swt.dnd.ByteArrayTransfer

checkByteArray, getSupportedTypes, isSupportedType

Methods inherited from class org.eclipse.swt.dnd.Transfer

getData, registerType

Methods inherited from class java.lang.Object

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

Field Detail

_instance

private static ImageTransfer _instance

CF_DIB

private static final java.lang.String CF_DIB

See Also:

Constant Field Values

CF_DIBID

private static final int CF_DIBID

See Also:

Constant Field Values

Constructor Detail

ImageTransfer

private ImageTransfer()

Method Detail

getInstance

public static ImageTransfer getInstance()

Returns the singleton instance of the ImageTransfer class.

Returns:

the singleton instance of the ImageTransfer class

javaToNative

public void javaToNative(java.lang.Object object,
                TransferData transferData)

This implementation of javaToNative converts an ImageData object represented by java ImageData to a platform specific representation.

Overrides:

javaToNative in class ByteArrayTransfer

Parameters:

object - a java ImageData containing the ImageData to be converted

transferData - an empty TransferData object that will be filled in on return with the platform specific format of the data

See Also:

Transfer.nativeToJava(org.eclipse.swt.dnd.TransferData)

nativeToJava

public java.lang.Object nativeToJava(TransferData transferData)

This implementation of nativeToJava converts a platform specific representation of an image to java ImageData.

Overrides:

nativeToJava in class ByteArrayTransfer

Parameters:

transferData - the platform specific representation of the data to be converted

Returns:

a java ImageData of the image if the conversion was successful; otherwise null

See Also:

Transfer.javaToNative(java.lang.Object, org.eclipse.swt.dnd.TransferData)

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 class Transfer

Returns:

the platform specific ids of the data types that can be converted using this transfer agent

getTypeNames

protected java.lang.String[] 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 class Transfer

Returns:

the platform specific names of the data types that can be converted using this transfer agent.

checkImage

boolean checkImage(java.lang.Object object)

validate

protected boolean validate(java.lang.Object object)

Description copied from class: Transfer

Test that the object is of the correct format for this Transfer class.

Overrides:

validate in class Transfer

Parameters:

object - a java representation of the data to be converted

Returns:

true if object is of the correct form for this transfer type