Source Code Cross Referenced for ISelectionService.java in  » IDE-Eclipse » ui-workbench » org » eclipse » ui » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » IDE Eclipse » ui workbench » org.eclipse.ui 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*******************************************************************************
002:         * Copyright (c) 2000, 2006 IBM Corporation and others.
003:         * All rights reserved. This program and the accompanying materials
004:         * are made available under the terms of the Eclipse Public License v1.0
005:         * which accompanies this distribution, and is available at
006:         * http://www.eclipse.org/legal/epl-v10.html
007:         *
008:         * Contributors:
009:         *     IBM Corporation - initial API and implementation
010:         *******************************************************************************/package org.eclipse.ui;
011:
012:        import org.eclipse.jface.viewers.ISelection;
013:
014:        /**
015:         * A selection service tracks the selection within an object.
016:         * <p>
017:         * A listener that wants to be notified when the selection becomes
018:         * <code>null</code> must implement the <code>INullSelectionListener</code>
019:         * interface.
020:         * </p>
021:         * <p>
022:         * This interface is not intended to be implemented by clients.
023:         * </p>
024:         * @see org.eclipse.ui.ISelectionListener
025:         * @see org.eclipse.ui.INullSelectionListener
026:         */
027:        public interface ISelectionService {
028:            /**
029:             * Adds the given selection listener.
030:             * Has no effect if an identical listener is already registered.
031:             *
032:             * @param listener a selection listener
033:             */
034:            public void addSelectionListener(ISelectionListener listener);
035:
036:            /**
037:             * Adds a part-specific selection listener which is notified when selection changes
038:             * in the part with the given id. This is independent of part activation - the part
039:             * need not be active for notification to be sent.
040:             * <p>
041:             * When the part is created, the listener is passed the part's initial selection.
042:             * When the part is disposed, the listener is passed a <code>null</code> selection,
043:             * but only if the listener implements <code>INullSelectionListener</code>.
044:             * </p>
045:             * <p>
046:             * Note: This will not correctly track editor parts as each editor does 
047:             * not have a unique partId.
048:             * </p>
049:             *
050:             * @param partId the id of the part to track
051:             * @param listener a selection listener
052:             * @since 2.0
053:             */
054:            public void addSelectionListener(String partId,
055:                    ISelectionListener listener);
056:
057:            /**
058:             * Adds the given post selection listener.It is equivalent to selection 
059:             * changed if the selection was triggered by the mouse but it has a 
060:             * delay if the selection is triggered by the keyboard arrows.
061:             * Has no effect if an identical listener is already registered.
062:             * 
063:             * Note: Works only for StructuredViewer(s).
064:             *
065:             * @param listener a selection listener
066:             */
067:            public void addPostSelectionListener(ISelectionListener listener);
068:
069:            /**
070:             * Adds a part-specific selection listener which is notified when selection changes
071:             * in the part with the given id. This is independent of part activation - the part
072:             * need not be active for notification to be sent.
073:             * <p>
074:             * When the part is created, the listener is passed the part's initial selection.
075:             * When the part is disposed, the listener is passed a <code>null</code> selection,
076:             * but only if the listener implements <code>INullSelectionListener</code>.
077:             * </p>
078:             * <p>
079:             * Note: This will not correctly track editor parts as each editor does 
080:             * not have a unique partId.
081:             * </p>
082:             *
083:             * @param partId the id of the part to track
084:             * @param listener a selection listener
085:             * @since 2.0
086:             */
087:            public void addPostSelectionListener(String partId,
088:                    ISelectionListener listener);
089:
090:            /**
091:             * Returns the current selection in the active part.  If the selection in the
092:             * active part is <em>undefined</em> (the active part has no selection provider)
093:             * the result will be <code>null</code>.
094:             *
095:             * @return the current selection, or <code>null</code> if undefined
096:             */
097:            public ISelection getSelection();
098:
099:            /**
100:             * Returns the current selection in the part with the given id.  If the part is not open,
101:             * or if the selection in the active part is <em>undefined</em> (the active part has no selection provider)
102:             * the result will be <code>null</code>.
103:             *
104:             * @param partId the id of the part
105:             * @return the current selection, or <code>null</code> if undefined
106:             * @since 2.0
107:             */
108:            public ISelection getSelection(String partId);
109:
110:            /**
111:             * Removes the given selection listener.
112:             * Has no effect if an identical listener is not registered.
113:             *
114:             * @param listener a selection listener
115:             */
116:            public void removeSelectionListener(ISelectionListener listener);
117:
118:            /**
119:             * Removes the given part-specific selection listener.
120:             * Has no effect if an identical listener is not registered for the given part id.
121:             *
122:             * @param partId the id of the part to track
123:             * @param listener a selection listener
124:             * @since 2.0
125:             */
126:            public void removeSelectionListener(String partId,
127:                    ISelectionListener listener);
128:
129:            /**
130:             * Removes the given post selection listener.
131:             * Has no effect if an identical listener is not registered.
132:             *
133:             * @param listener a selection listener
134:             */
135:            public void removePostSelectionListener(ISelectionListener listener);
136:
137:            /**
138:             * Removes the given part-specific post selection listener.
139:             * Has no effect if an identical listener is not registered for the given part id.
140:             *
141:             * @param partId the id of the part to track
142:             * @param listener a selection listener
143:             * @since 2.0
144:             */
145:            public void removePostSelectionListener(String partId,
146:                    ISelectionListener listener);
147:        }
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