Source Code Cross Referenced for JobTreeElement.java in  » IDE-Eclipse » ui-workbench » org » eclipse » ui » internal » progress » 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.internal.progress 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*******************************************************************************
002:         * Copyright (c) 2003, 2007 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.internal.progress;
011:
012:        import org.eclipse.swt.graphics.Image;
013:
014:        /**
015:         * The JobTreeElement is the abstract superclass of items displayed in the tree.
016:         */
017:        abstract class JobTreeElement implements  Comparable {
018:
019:            /**
020:             * Return the parent of this object.
021:             * 
022:             * @return Object
023:             */
024:            abstract Object getParent();
025:
026:            /**
027:             * Return whether or not the receiver has children.
028:             * 
029:             * @return boolean
030:             */
031:            abstract boolean hasChildren();
032:
033:            /**
034:             * Return the children of the receiver.
035:             * 
036:             * @return Object[]
037:             */
038:            abstract Object[] getChildren();
039:
040:            /**
041:             * Return the displayString for the receiver.
042:             * 
043:             * @return String
044:             */
045:            abstract String getDisplayString();
046:
047:            /**
048:             * Return the displayString for the receiver.
049:             * 
050:             * @param showProgress
051:             *            Whether or not progress is being shown (if relevant).
052:             * @return String
053:             */
054:            String getDisplayString(boolean showProgress) {
055:                return getDisplayString();
056:            }
057:
058:            /**
059:             * Get the image for the reciever. By default there is no image.
060:             * 
061:             * @return Image or <code>null</code>.
062:             */
063:            public Image getDisplayImage() {
064:                return null;
065:            }
066:
067:            /**
068:             * Return the condensed version of the display string
069:             * 
070:             * @return String
071:             */
072:            String getCondensedDisplayString() {
073:                return getDisplayString();
074:            }
075:
076:            /**
077:             * Return whether or not the receiver is an info.
078:             * 
079:             * @return boolean
080:             */
081:            abstract boolean isJobInfo();
082:
083:            /*
084:             * (non-Javadoc)
085:             * 
086:             * @see java.lang.Comparable#compareTo(java.lang.Object)
087:             */
088:            public int compareTo(Object arg0) {
089:                if (arg0 instanceof  JobTreeElement)
090:                    return getDisplayString().compareTo(
091:                            ((JobTreeElement) arg0).getDisplayString());
092:                return 0;
093:            }
094:
095:            /**
096:             * Return whether or not this is currently active.
097:             * 
098:             * @return boolean
099:             */
100:            abstract boolean isActive();
101:
102:            /**
103:             * Return whether or not the receiver can be cancelled.
104:             * 
105:             * @return boolean
106:             */
107:            public boolean isCancellable() {
108:                return false;
109:            }
110:
111:            /**
112:             * Cancel the receiver.
113:             */
114:            public void cancel() {
115:                // By default do nothing.
116:            }
117:        }
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