| package org.eclipse.swt.dnd;
|
|
|
| /*
|
| * (c) Copyright IBM Corp. 2000, 2001.
|
| * All Rights Reserved
|
| */
|
|
|
| import org.eclipse.swt.internal.Converter;
|
| import org.eclipse.swt.internal.gtk.OS;
|
| import org.eclipse.swt.widgets.Display;
|
|
|
| /** |
| * The class <code>Transfer</code> provides a mechanism for converting a Java object to a |
| * platform specific format that can be passed around in a Drag and Drop operation and vice versa. |
| * |
| * <p>You should only need to become familiar with this class if you are implementing |
| * a Transfer subclass and you are unable to subclass the ByteArrayTransfer class.</p> |
| */ |
| public abstract class Transfer {
|
| /** |
| * Returns a list of the data types that can be transferred using this Transfer agent. |
| * |
| * <p>Only the data type fields of the TransferData Object are filled in.</p> |
| * |
| * @return a list of the data types that can be transferred using this Transfer agent |
| */ |
| abstract public TransferData[] getSupportedTypes();
|
| /** |
| * Returns true if the transferData data type can be transferred using this Transfer agent. |
| * |
| * @param transferData a platform specific description of a data type; only the data type fields |
| * of the TransferData Object need to be filled in |
| * |
| * @return true if the transferData data type can be transferred using this Transfer agent |
| */ |
| abstract public boolean isSupportedType(TransferData transferData);
|
| abstract protected String[] getTypeNames();
|
| abstract protected int[] getTypeIds();
|
| abstract protected void javaToNative (Object object, TransferData transferData);
|
| abstract protected Object nativeToJava(TransferData transferData);
|
| /** |
| * Registers a name for a data type and returns the associated unique identifier. |
| * |
| * <p>You may register the same type more than once, the same unique identifier will be returned if the |
| * type has been previously registered.</p> |
| * |
| * <p>Note: Do <b>not</b> call this method with pre-defined Clipboard Format types such as CF_TEXT |
| * or CF_BITMAP because the pre-defined value will not be returned</p> |
| * |
| * @param formatName the name of a data type |
| * |
| * @return the unique identifier associated with htis data type |
| */ |
| public static int registerType(String formatName){
|
| return 0;
|
| }
|
| }
|
