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/*******************************************************************************
 * Copyright (c) 2000, 2010, 2012 IBM Corporation, Gerhardt Informatics Kft. 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
 *     Gerhardt Informatics Kft. - GEFGWT port
 *******************************************************************************/
package org.eclipse.gef;

/**
 * The set of constants used to identify Requests by their
 * {@link Request#getType() type}. Applications can extend this set of constants
 * with their own.
 */
public interface RequestConstants {

	/**
	 * Indicates the creation of a new connection. Creating a connection
	 * involves both the source node and target node EditParts. This is the
	 * constant that is used with the first node on which the user clicks.
	 */
	String REQ_CONNECTION_START = "connection start";//$NON-NLS-1$

	/**
	 * Indicates the end of creation of a new connection. Creating a connection
	 * involves both the source node and target node EditParts. This is the
	 * constant that is used with the second node on which the user clicks.
	 */
	String REQ_CONNECTION_END = "connection end";//$NON-NLS-1$

	/**
	 * Constant used to indicate that the source end of an existing
	 * connection is being reconnected to a new source node EditPart. The new
	 * source node is the receiver of such Requests.
	 */
	String REQ_RECONNECT_SOURCE = "Reconnection source";//$NON-NLS-1$

	/**
	 * Constant used to indicate that the target end of an existing
	 * connection is being reconnected to a new target node EditPart. The new
	 * target node is the receiver of such Requests.
	 */
	String REQ_RECONNECT_TARGET = "Reconnection target";//$NON-NLS-1$

	/**
	 * Indicates that an existing bendpoint is being moved or dragged by the
	 * User.
	 */
	String REQ_MOVE_BENDPOINT = "move bendpoint";//$NON-NLS-1$

	/**
	 * Indicates that a bendpoint is being inserted by the User.
	 */
	String REQ_CREATE_BENDPOINT = "create bendpoint";//$NON-NLS-1$

	/**
	 * Indicates that a part (or a group of parts) is being resized.
	 */
	String REQ_RESIZE = "resize"; //$NON-NLS-1$

	/**
	 * Indicates that a group of children are to be resized.
	 */
	String REQ_RESIZE_CHILDREN = "resize children"; //$NON-NLS-1$

	/**
	 * Indicates that a part (or a group of parts) is being moved within its
	 * current parent.
	 */
	String REQ_MOVE = "move"; //$NON-NLS-1$

	/**
	 * Indicates that a group of children are being moved.
	 */
	String REQ_MOVE_CHILDREN = "move children"; //$NON-NLS-1$

	/**
	 * Indicates that the user has double-clicked on the receiver. "Open" means
	 * different things for different applications. Sometimes it means open a
	 * popup dialog of properties, or the Workbench's properties view. Sometimes
	 * it means open a sub-diagram.
	 */
	String REQ_OPEN = "open"; //$NON-NLS-1$

	/**
	 * Indicates that the receiver is being removed from its current parent, to
	 * be inserted into a new parent.
	 */
	String REQ_ORPHAN = "orphan"; //$NON-NLS-1$

	/**
	 * Indicates that a group of children are being removed from the receiver of
	 * the Request.
	 */
	String REQ_ORPHAN_CHILDREN = "orphan children"; //$NON-NLS-1$

	/**
	 * Indicates that an object is to be created by the receiver of the Request.
	 */
	String REQ_CREATE = "create child"; //$NON-NLS-1$

	/**
	 * Constant used to indicate that a group of existing children are being
	 * added to the receiver of the Request.
	 */
	String REQ_ADD = "add children"; //$NON-NLS-1$

	/**
	 * Indicates that the reciever of the request should be cloned.
	 */
	String REQ_CLONE = "clone"; //$NON-NLS-1$

	/**
	 * Constant used to indicate that the receiver of the Request is being
	 * deleted.
	 */
	String REQ_DELETE = "delete"; //$NON-NLS-1$

	/**
	 * Constant used to indicate that a child of the receiver the Request is to
	 * be deleted.
	 */
	String REQ_DELETE_DEPENDANT = "delete dependant"; //$NON-NLS-1$

	/**
	 * Constant used to indicate that alignment is being performed.
	 */
	String REQ_ALIGN = "align"; //$NON-NLS-1$

	/**
	 * Constant used to indicate that a group of children are being aligned.
	 */
	String REQ_ALIGN_CHILDREN = "align children"; //$NON-NLS-1$

	/**
	 * Indicates that a direct edit should be performed.
	 */
	String REQ_DIRECT_EDIT = "direct edit"; //$NON-NLS-1$

	/**
	 * Indicates selection Requests.
	 */
	String REQ_SELECTION = "selection"; //$NON-NLS-1$

	/**
	 * Indicates selection hover Requests.
	 */
	String REQ_SELECTION_HOVER = "selection hover"; //$NON-NLS-1$

}