Spec-Zone .ru
спецификации, руководства, описания, API
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001/* 002 * Copyright (c) 2010, 2013, Oracle and/or its affiliates. All rights reserved. 003 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 004 * 005 * This code is free software; you can redistribute it and/or modify it 006 * under the terms of the GNU General Public License version 2 only, as 007 * published by the Free Software Foundation. Oracle designates this 008 * particular file as subject to the "Classpath" exception as provided 009 * by Oracle in the LICENSE file that accompanied this code. 010 * 011 * This code is distributed in the hope that it will be useful, but WITHOUT 012 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 013 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 014 * version 2 for more details (a copy is included in the LICENSE file that 015 * accompanied this code). 016 * 017 * You should have received a copy of the GNU General Public License version 018 * 2 along with this work; if not, write to the Free Software Foundation, 019 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 020 * 021 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 022 * or visit www.oracle.com if you need additional information or have any 023 * questions. 024 */ 025 026package javafx.scene.shape; 027 028import javafx.collections.ListChangeListener.Change; 029import javafx.collections.ObservableList; 030 031import com.sun.javafx.collections.TrackableObservableList; 032import com.sun.javafx.geom.BaseBounds; 033import com.sun.javafx.geom.Path2D; 034import com.sun.javafx.geom.transform.BaseTransform; 035import com.sun.javafx.scene.DirtyBits; 036import com.sun.javafx.sg.PGNode; 037import com.sun.javafx.sg.PGPolygon; 038import com.sun.javafx.sg.PGShape.Mode; 039import com.sun.javafx.tk.Toolkit; 040import javafx.scene.paint.Paint; 041 042/** 043 * Creates a polygon, defined by an array of x,y coordinates. The Polygon 044 * class is similar to the Polyline class, except that the Polyline class 045 * is not automatically closed. 046 * 047<PRE> 048import javafx.scene.shape.*; 049 050Polygon polygon = new Polygon(); 051polygon.getPoints().addAll(new Double[]{ 052 0.0, 0.0, 053 20.0, 10.0, 054 10.0, 20.0 }); 055</PRE> 056 */ 057public class Polygon extends Shape { 058 059 private final Path2D shape = new Path2D(); 060 061 /** 062 * Creates an empty instance of Polygon. 063 */ 064 public Polygon() { 065 } 066 067 /** 068 * Creates a new instance of Polygon. 069 * @param points the coordinates of the polygon vertices 070 */ 071 public Polygon(double... points) { 072 if (points != null) { 073 for (double p : points) { 074 this.getPoints().add(p); 075 } 076 } 077 } 078 079 /** 080 * Defines the coordinates of the polygon vertices. 081 * 082 * @defaultValue empty 083 */ 084 private final ObservableList<Double> points = new TrackableObservableList<Double>() { 085 @Override 086 protected void onChanged(Change<Double> c) { 087 impl_markDirty(DirtyBits.NODE_GEOMETRY); 088 impl_geomChanged(); 089 } 090 }; 091 092 /** 093 * Gets the coordinates of the {@code Polygon} vertices. 094 * @return An observable list of vertices of this {@code Polygon} 095 */ 096 public final ObservableList<Double> getPoints() { return points; } 097 098 /** 099 * @treatAsPrivate implementation detail 100 * @deprecated This is an internal API that is not intended for use and will be removed in the next version 101 */ 102 @Deprecated 103 protected PGNode impl_createPGNode() { 104 return Toolkit.getToolkit().createPGPolygon(); 105 } 106 107 PGPolygon getPGPolygon() { 108 return (PGPolygon)impl_getPGNode(); 109 } 110 111 /** 112 * @treatAsPrivate implementation detail 113 * @deprecated This is an internal API that is not intended for use and will be removed in the next version 114 */ 115 @Deprecated 116 public BaseBounds impl_computeGeomBounds(BaseBounds bounds, BaseTransform tx) { 117 if (impl_mode == Mode.EMPTY || getPoints().size() <= 1) { 118 return bounds.makeEmpty(); 119 } 120 121 if (getPoints().size() == 2) { 122 if (impl_mode == Mode.FILL || getStrokeType() == StrokeType.INSIDE) { 123 return bounds.makeEmpty(); 124 } 125 double upad = getStrokeWidth(); 126 if (getStrokeType() == StrokeType.CENTERED) { 127 upad /= 2.0f; 128 } 129 return computeBounds(bounds, tx, upad, 0.5f, 130 getPoints().get(0), getPoints().get(1), 0.0f, 0.0f); 131 } else { 132 return computeShapeBounds(bounds, tx, impl_configShape()); 133 } 134 } 135 136 /** 137 * @treatAsPrivate implementation detail 138 * @deprecated This is an internal API that is not intended for use and will be removed in the next version 139 */ 140 @Deprecated 141 @Override 142 public Path2D impl_configShape() { 143 double p1 = getPoints().get(0); 144 double p2 = getPoints().get(1); 145 shape.reset(); 146 shape.moveTo((float)p1, (float)p2); 147 final int numValidPoints = getPoints().size() & ~1; 148 for (int i = 2; i < numValidPoints; i += 2) { 149 p1 = getPoints().get(i); p2 = getPoints().get(i+1); 150 shape.lineTo((float)p1, (float)p2); 151 } 152 shape.closePath(); 153 return shape; 154 } 155 156 /** 157 * @treatAsPrivate implementation detail 158 * @deprecated This is an internal API that is not intended for use and will be removed in the next version 159 */ 160 @Deprecated 161 public void impl_updatePG() { 162 super.impl_updatePG(); 163 if (impl_isDirty(DirtyBits.NODE_GEOMETRY)) { 164 final int numValidPoints = getPoints().size() & ~1; 165 float points_array[] = new float[numValidPoints]; 166 for (int i = 0; i < numValidPoints; i++) { 167 points_array[i] = (float)getPoints().get(i).doubleValue(); 168 } 169 getPGPolygon().updatePolygon(points_array); 170 } 171 } 172 173 /** 174 * Returns a string representation of this {@code Polygon} object. 175 * @return a string representation of this {@code Polygon} object. 176 */ 177 @Override 178 public String toString() { 179 final StringBuilder sb = new StringBuilder("Polygon["); 180 181 String id = getId(); 182 if (id != null) { 183 sb.append("id=").append(id).append(", "); 184 } 185 186 sb.append("points=").append(getPoints()); 187 188 sb.append(", fill=").append(getFill()); 189 190 Paint stroke = getStroke(); 191 if (stroke != null) { 192 sb.append(", stroke=").append(stroke); 193 sb.append(", strokeWidth=").append(getStrokeWidth()); 194 } 195 196 return sb.append("]").toString(); 197 } 198} 199