Source Code Cross Referenced for CanvasGraphicsNode.java in  » Graphic-Library » batik » org » apache » batik » gvt » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Graphic Library » batik » org.apache.batik.gvt 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:
003:           Licensed to the Apache Software Foundation (ASF) under one or more
004:           contributor license agreements.  See the NOTICE file distributed with
005:           this work for additional information regarding copyright ownership.
006:           The ASF licenses this file to You under the Apache License, Version 2.0
007:           (the "License"); you may not use this file except in compliance with
008:           the License.  You may obtain a copy of the License at
009:
010:               http://www.apache.org/licenses/LICENSE-2.0
011:
012:           Unless required by applicable law or agreed to in writing, software
013:           distributed under the License is distributed on an "AS IS" BASIS,
014:           WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
015:           See the License for the specific language governing permissions and
016:           limitations under the License.
017:
018:         */
019:        package org.apache.batik.gvt;
020:
021:        import java.awt.Graphics2D;
022:        import java.awt.Paint;
023:        import java.awt.geom.AffineTransform;
024:        import java.awt.geom.NoninvertibleTransformException;
025:
026:        /**
027:         * The graphics node container with a background color.
028:         *
029:         * @author <a href="mailto:Thierry.Kormann@sophia.inria.fr">Thierry Kormann</a>
030:         * @version $Id: CanvasGraphicsNode.java 504084 2007-02-06 11:24:46Z dvholten $
031:         */
032:        public class CanvasGraphicsNode extends CompositeGraphicsNode {
033:
034:            /**
035:             * This is the position transform for this graphics node.
036:             * This is needed because getCTM returns the transform
037:             * to the viewport coordinate system which is after viewing but
038:             * before positioning.
039:             */
040:            protected AffineTransform positionTransform;
041:            /**
042:             * This is the viewing transform for this graphics node.
043:             * This is needed because getCTM returns the transform
044:             * to the viewport coordinate system which is after viewing but
045:             * before positioning.
046:             */
047:            protected AffineTransform viewingTransform;
048:
049:            /**
050:             * The background of this canvas graphics node.
051:             */
052:            protected Paint backgroundPaint;
053:
054:            /**
055:             * Constructs a new empty <tt>CanvasGraphicsNode</tt>.
056:             */
057:            public CanvasGraphicsNode() {
058:            }
059:
060:            //
061:            // Properties methods
062:            //
063:
064:            /**
065:             * Sets the background paint of this canvas graphics node.
066:             *
067:             * @param newBackgroundPaint the new background paint
068:             */
069:            public void setBackgroundPaint(Paint newBackgroundPaint) {
070:                this .backgroundPaint = newBackgroundPaint;
071:            }
072:
073:            /**
074:             * Returns the background paint of this canvas graphics node.
075:             */
076:            public Paint getBackgroundPaint() {
077:                return backgroundPaint;
078:            }
079:
080:            public void setPositionTransform(AffineTransform at) {
081:                fireGraphicsNodeChangeStarted();
082:                invalidateGeometryCache();
083:                this .positionTransform = at;
084:                if (positionTransform != null) {
085:                    transform = new AffineTransform(positionTransform);
086:                    if (viewingTransform != null)
087:                        transform.concatenate(viewingTransform);
088:                } else if (viewingTransform != null)
089:                    transform = new AffineTransform(viewingTransform);
090:                else
091:                    transform = new AffineTransform();
092:
093:                if (transform.getDeterminant() != 0) {
094:                    try {
095:                        inverseTransform = transform.createInverse();
096:                    } catch (NoninvertibleTransformException e) {
097:                        // Should never happen.
098:                        throw new Error(e.getMessage());
099:                    }
100:                } else {
101:                    // The transform is not invertible. Use the same
102:                    // transform.
103:                    inverseTransform = transform;
104:                }
105:                fireGraphicsNodeChangeCompleted();
106:            }
107:
108:            public AffineTransform getPositionTransform() {
109:                return positionTransform;
110:            }
111:
112:            public void setViewingTransform(AffineTransform at) {
113:                fireGraphicsNodeChangeStarted();
114:                invalidateGeometryCache();
115:                this .viewingTransform = at;
116:                if (positionTransform != null) {
117:                    transform = new AffineTransform(positionTransform);
118:                    if (viewingTransform != null)
119:                        transform.concatenate(viewingTransform);
120:                } else if (viewingTransform != null)
121:                    transform = new AffineTransform(viewingTransform);
122:                else
123:                    transform = new AffineTransform();
124:
125:                if (transform.getDeterminant() != 0) {
126:                    try {
127:                        inverseTransform = transform.createInverse();
128:                    } catch (NoninvertibleTransformException e) {
129:                        // Should never happen.
130:                        throw new Error(e.getMessage());
131:                    }
132:                } else {
133:                    // The transform is not invertible. Use the same
134:                    // transform.
135:                    inverseTransform = transform;
136:                }
137:                fireGraphicsNodeChangeCompleted();
138:            }
139:
140:            public AffineTransform getViewingTransform() {
141:                return viewingTransform;
142:            }
143:
144:            //
145:            // Drawing methods
146:            //
147:
148:            /**
149:             * Paints this node without applying Filter, Mask, Composite, and clip.
150:             *
151:             * @param g2d the Graphics2D to use
152:             */
153:            public void primitivePaint(Graphics2D g2d) {
154:                if (backgroundPaint != null) {
155:                    g2d.setPaint(backgroundPaint);
156:                    g2d.fill(g2d.getClip()); // Fast paint for huge background area
157:                }
158:                super.primitivePaint(g2d);
159:            }
160:        }
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