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Diffstat (limited to 'bundles/org.eclipse.swt/Eclipse SWT Drag and Drop/win32/org/eclipse/swt/dnd/Transfer.java')
-rwxr-xr-x | bundles/org.eclipse.swt/Eclipse SWT Drag and Drop/win32/org/eclipse/swt/dnd/Transfer.java | 179 |
1 files changed, 0 insertions, 179 deletions
diff --git a/bundles/org.eclipse.swt/Eclipse SWT Drag and Drop/win32/org/eclipse/swt/dnd/Transfer.java b/bundles/org.eclipse.swt/Eclipse SWT Drag and Drop/win32/org/eclipse/swt/dnd/Transfer.java deleted file mode 100755 index 4a7f318b21..0000000000 --- a/bundles/org.eclipse.swt/Eclipse SWT Drag and Drop/win32/org/eclipse/swt/dnd/Transfer.java +++ /dev/null @@ -1,179 +0,0 @@ -/******************************************************************************* - * Copyright (c) 2000, 2008 IBM Corporation and others. - * All rights reserved. This program and the accompanying materials - * are made available under the terms of the Eclipse Public License v1.0 - * which accompanies this distribution, and is available at - * http://www.eclipse.org/legal/epl-v10.html - * - * Contributors: - * IBM Corporation - initial API and implementation - *******************************************************************************/ -package org.eclipse.swt.dnd; - - -import org.eclipse.swt.internal.ole.win32.*; -import org.eclipse.swt.internal.win32.*; - -/** - * <code>Transfer</code> provides a mechanism for converting between a java - * representation of data and a platform specific representation of data and - * vice versa. It is used in data transfer operations such as drag and drop and - * clipboard copy/paste. - * - * <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> - * - * @see ByteArrayTransfer - * @see <a href="http://www.eclipse.org/swt/snippets/#dnd">Drag and Drop snippets</a> - * @see <a href="http://www.eclipse.org/swt/examples.php">SWT Example: DNDExample</a> - * @see <a href="http://www.eclipse.org/swt/">Sample code and further information</a> - */ -public abstract class Transfer { - -private static final int RETRY_LIMIT = 10; -/* - * Feature in Windows. When another application has control - * of the clipboard, the clipboard is locked and it's not - * possible to retrieve data until the other application is - * finished. To allow other applications to get the - * data, use PeekMessage() to enable cross thread - * message sends. - */ -int getData(IDataObject dataObject, FORMATETC pFormatetc, STGMEDIUM pmedium) { - if (dataObject.GetData(pFormatetc, pmedium) == COM.S_OK) return COM.S_OK; - try {Thread.sleep(50);} catch (Throwable t) {} - int result = dataObject.GetData(pFormatetc, pmedium); - int retryCount = 0; - while (result != COM.S_OK && retryCount++ < RETRY_LIMIT) { - MSG msg = new MSG(); - OS.PeekMessage(msg, 0, 0, 0, OS.PM_NOREMOVE | OS.PM_NOYIELD); - try {Thread.sleep(50);} catch (Throwable t) {} - result = dataObject.GetData(pFormatetc, pmedium); - } - return result; -} - -/** - * Returns a list of the platform specific data types that can be converted using - * this transfer agent. - * - * <p>Only the data type fields of the <code>TransferData</code> objects are filled - * in.</p> - * - * @return a list of the data types that can be converted using this transfer agent - */ -abstract public TransferData[] getSupportedTypes(); - -/** - * Returns true if the <code>TransferData</code> data type can be converted - * using this transfer agent, or false otherwise (including if transferData is - * <code>null</code>). - * - * @param transferData a platform specific description of a data type; only the data - * type fields of the <code>TransferData</code> object need to be filled in - * - * @return true if the transferData data type can be converted using this transfer - * agent - */ -abstract public boolean isSupportedType(TransferData transferData); - -/** - * Returns the platform specific ids of the data types that can be converted using - * this transfer agent. - * - * @return the platform specific ids of the data types that can be converted using - * this transfer agent - */ -abstract protected int[] getTypeIds(); - -/** - * Returns the platform specific names of the data types that can be converted - * using this transfer agent. - * - * @return the platform specific names of the data types that can be converted - * using this transfer agent. - */ -abstract protected String[] getTypeNames(); - -/** - * Converts a java representation of data to a platform specific representation of - * the data. - * - * <p>On a successful conversion, the transferData.result field will be set as follows: - * <ul> - * <li>Windows: COM.S_OK - * <li>Motif: 1 - * <li>GTK: 1 - * <li>Photon: 1 - * </ul></p> - * - * <p>If this transfer agent is unable to perform the conversion, the transferData.result - * field will be set to a failure value as follows: - * <ul> - * <li>Windows: COM.DV_E_TYMED or COM.E_FAIL - * <li>Motif: 0 - * <li>GTK: 0 - * <li>Photon: 0 - * </ul></p> - * - * @param object a java representation of the data to be converted; the type of - * Object that is passed in is dependent on the <code>Transfer</code> subclass. - * - * @param transferData an empty TransferData object; this object will be - * filled in on return with the platform specific representation of the data - * - * @exception org.eclipse.swt.SWTException <ul> - * <li>ERROR_INVALID_DATA - if object does not contain data in a valid format or is <code>null</code></li> - * </ul> - */ -abstract protected void javaToNative (Object object, TransferData transferData); - -/** - * Converts a platform specific representation of data to a java representation. - * - * @param transferData the platform specific representation of the data to be - * converted - * - * @return a java representation of the converted data if the conversion was - * successful; otherwise null. If transferData is <code>null</code> then - * <code>null</code> is returned. The type of Object that is returned is - * dependent on the <code>Transfer</code> subclass. - */ -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: On windows, do <b>not</b> call this method with pre-defined - * Clipboard Format types such as CF_TEXT or CF_BITMAP because the - * pre-defined identifier will not be returned</p> - * - * @param formatName the name of a data type - * - * @return the unique identifier associated with this data type - */ -public static int registerType(String formatName) { - // Look name up in the registry - // If name is not in registry, add it and return assigned value. - // If name already exists in registry, return its assigned value - TCHAR chFormatName = new TCHAR(0, formatName, true); - return OS.RegisterClipboardFormat(chFormatName); -} - -/** - * Test that the object is of the correct format for this Transfer class. - * - * @param object a java representation of the data to be converted - * - * @return true if object is of the correct form for this transfer type - * - * @since 3.1 - */ -protected boolean validate(Object object) { - return true; -} -} |