001: /*
002: * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
003: *
004: * Copyright 1997-2007 Sun Microsystems, Inc. All rights reserved.
005: *
006: * The contents of this file are subject to the terms of either the GNU
007: * General Public License Version 2 only ("GPL") or the Common
008: * Development and Distribution License("CDDL") (collectively, the
009: * "License"). You may not use this file except in compliance with the
010: * License. You can obtain a copy of the License at
011: * http://www.netbeans.org/cddl-gplv2.html
012: * or nbbuild/licenses/CDDL-GPL-2-CP. See the License for the
013: * specific language governing permissions and limitations under the
014: * License. When distributing the software, include this License Header
015: * Notice in each file and include the License file at
016: * nbbuild/licenses/CDDL-GPL-2-CP. Sun designates this
017: * particular file as subject to the "Classpath" exception as provided
018: * by Sun in the GPL Version 2 section of the License file that
019: * accompanied this code. If applicable, add the following below the
020: * License Header, with the fields enclosed by brackets [] replaced by
021: * your own identifying information:
022: * "Portions Copyrighted [year] [name of copyright owner]"
023: *
024: * Contributor(s):
025: *
026: * The Original Software is NetBeans. The Initial Developer of the Original
027: * Software is Sun Microsystems, Inc. Portions Copyright 1997-2007 Sun
028: * Microsystems, Inc. All Rights Reserved.
029: *
030: * If you wish your version of this file to be governed by only the CDDL
031: * or only the GPL Version 2, indicate your decision by adding
032: * "[Contributor] elects to include this software in this distribution
033: * under the [CDDL or GPL Version 2] license." If you do not indicate a
034: * single choice of license, a recipient has the option to distribute
035: * your version of this file under either the CDDL, the GPL Version 2 or
036: * to extend the choice of license to its licensees as provided above.
037: * However, if you add GPL Version 2 code and therefore, elected the GPL
038: * Version 2 license, then the option applies only if the new code is
039: * made subject to such option by the copyright holder.
040: */
041:
042: package org.netbeans.modules.uml.ui.products.ad.viewfactory;
043:
044: import org.netbeans.modules.uml.ui.support.viewfactorysupport.DrawEngineArrowheadKindEnum;
045: import org.netbeans.modules.uml.ui.support.viewfactorysupport.IDrawInfo;
046: import com.tomsawyer.editor.TSEColor;
047: import java.awt.geom.GeneralPath;
048: import java.awt.Polygon;
049: import java.awt.Rectangle; //import com.tomsawyer.util.TSConstRect;
050: import com.tomsawyer.drawing.geometry.TSConstRect; //import com.tomsawyer.util.TSConstPoint;
051: import com.tomsawyer.drawing.geometry.TSConstPoint; //import com.tomsawyer.util.TSTransform;
052: import com.tomsawyer.editor.TSTransform;
053: import java.awt.geom.GeneralPath;
054:
055: public class ETUnFilledDiamond extends ETUnFilledArrow {
056:
057: public ETUnFilledDiamond() {
058: super (DrawEngineArrowheadKindEnum.DEAK_UNFILLEDDIAMOND);
059: }
060:
061: protected ETUnFilledDiamond(int kind) {
062: super (kind);
063: }
064:
065: protected boolean isFilled() {
066: return false;
067: }
068:
069: protected boolean isOpenRegion() {
070: return false;
071: };
072:
073: public boolean draw(IDrawInfo pInfo, TSConstPoint fromPt,
074: TSConstPoint toPt, TSEColor color) {
075: return super .draw(pInfo, fromPt, toPt, isFilled() ? color
076: : TSEColor.white);
077: }
078:
079: public GeneralPath getShape(IDrawInfo pInfo, TSConstPoint fromPt,
080: TSConstPoint toPt) {
081: TSTransform transform = pInfo.getTSTransform();
082: double fromX = fromPt.getX();
083: double fromY = fromPt.getY();
084: double toX = toPt.getX();
085: double toY = toPt.getY();
086:
087: float edgeVectorX = transform.widthToDevice(toX - fromX);
088: float edgeVectorY = transform.heightToDevice(toY - fromY);
089: float edgeLength = (float) Math
090: .sqrt((edgeVectorX * edgeVectorX)
091: + (edgeVectorY * edgeVectorY));
092:
093: // avoid divide-by-zero.
094:
095: if (edgeLength == 0.0f) {
096: return null;
097: }
098:
099: int lineFromX = transform.xToDevice(fromX);
100: int lineFromY = transform.yToDevice(fromY);
101: int lineToX = transform.xToDevice(toX);
102: int lineToY = transform.yToDevice(toY);
103:
104: float halfArrowWidth = transform.widthToDevice(this .getWidth()) / 2;
105: float arrowHeight = transform.heightToDevice(this .getHeight());
106:
107: // normalize the edge vector components.
108:
109: edgeVectorX /= edgeLength;
110: edgeVectorY /= edgeLength;
111:
112: // calculate the vector from the center of the base to
113: // the arrow tip
114:
115: float arrowHeightX = arrowHeight * edgeVectorX;
116: float arrowHeightY = arrowHeight * edgeVectorY;
117:
118: // calculate the vector from the base center point to
119: // the edge of the base
120:
121: float halfBaseVectorX = halfArrowWidth * edgeVectorY;
122: float halfBaseVectorY = halfArrowWidth * edgeVectorX;
123:
124: // draw GeneralPath (polyline)
125:
126: GeneralPath polyline = new GeneralPath(
127: GeneralPath.WIND_EVEN_ODD);
128:
129: polyline.moveTo(lineToX
130: - (int) (arrowHeightX - halfBaseVectorX), lineToY
131: + (int) (arrowHeightY + halfBaseVectorY));
132:
133: polyline.lineTo(lineToX, lineToY);
134:
135: polyline.lineTo(lineToX
136: - (int) (arrowHeightX + halfBaseVectorX), lineToY
137: + (int) (arrowHeightY - halfBaseVectorY));
138:
139: polyline.lineTo(lineToX - (int) (arrowHeightX * 2), lineToY
140: + (int) (arrowHeightY * 2));
141:
142: polyline.closePath();
143: return polyline;
144: }
145:
146: public int getDefaultHeight() {
147: return super .getDefaultHeight() / 2;
148: }
149:
150: /* (non-Javadoc)
151: * @see org.netbeans.modules.uml.ui.support.viewfactorysupport.IETArrowHead#getDefaultWidth()
152: */
153: public int getDefaultWidth() {
154: return 8;
155: }
156:
157: }
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