1 | // License: GPL. For details, see LICENSE file.
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2 | package org.openstreetmap.josm.gui.draw;
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3 |
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4 | import java.awt.Shape;
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5 | import java.awt.geom.Ellipse2D;
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6 | import java.awt.geom.GeneralPath;
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7 | import java.awt.geom.Rectangle2D;
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8 | import java.util.Optional;
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9 | import java.util.stream.Stream;
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10 |
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11 | /**
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12 | * A list of possible symbol shapes.
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13 | * @since 10875
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14 | */
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15 | public enum SymbolShape {
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16 | /**
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17 | * A square
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18 | */
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19 | SQUARE("square", 4, Math.PI / 4),
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20 | /**
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21 | * A circle
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22 | */
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23 | CIRCLE("circle", 1, 0),
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24 | /**
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25 | * A triangle with sides of equal lengh
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26 | */
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27 | TRIANGLE("triangle", 3, Math.PI / 2),
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28 | /**
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29 | * A pentagon
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30 | */
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31 | PENTAGON("pentagon", 5, Math.PI / 2),
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32 | /**
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33 | * A hexagon
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34 | */
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35 | HEXAGON("hexagon", 6, 0),
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36 | /**
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37 | * A heptagon
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38 | */
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39 | HEPTAGON("heptagon", 7, Math.PI / 2),
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40 | /**
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41 | * An octagon
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42 | */
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43 | OCTAGON("octagon", 8, Math.PI / 8),
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44 | /**
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45 | * a nonagon
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46 | */
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47 | NONAGON("nonagon", 9, Math.PI / 2),
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48 | /**
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49 | * A decagon
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50 | */
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51 | DECAGON("decagon", 10, 0);
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52 |
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53 | private final String name;
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54 | final int sides;
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55 |
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56 | final double rotation;
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57 |
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58 | SymbolShape(String name, int sides, double rotation) {
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59 | this.name = name;
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60 | this.sides = sides;
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61 | this.rotation = rotation;
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62 | }
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63 |
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64 | /**
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65 | * Create the path for this shape around the given position
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66 | * @param x The x position
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67 | * @param y The y position
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68 | * @param size The size (width for rect, diameter for rest)
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69 | * @return The symbol.
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70 | * @since 10875
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71 | */
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72 | public Shape shapeAround(double x, double y, double size) {
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73 | double radius = size / 2;
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74 | Shape shape;
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75 | switch (this) {
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76 | case SQUARE:
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77 | // optimize for performance reasons
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78 | shape = new Rectangle2D.Double(x - radius, y - radius, size, size);
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79 | break;
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80 | case CIRCLE:
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81 | shape = new Ellipse2D.Double(x - radius, y - radius, size, size);
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82 | break;
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83 | default:
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84 | shape = buildPolygon(x, y, radius);
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85 | break;
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86 | }
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87 | return shape;
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88 | }
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89 |
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90 | private Shape buildPolygon(double cx, double cy, double radius) {
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91 | GeneralPath polygon = new GeneralPath();
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92 | for (int i = 0; i < sides; i++) {
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93 | double angle = ((2 * Math.PI / sides) * i) - rotation;
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94 | double x = cx + radius * Math.cos(angle);
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95 | double y = cy + radius * Math.sin(angle);
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96 | if (i == 0) {
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97 | polygon.moveTo(x, y);
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98 | } else {
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99 | polygon.lineTo(x, y);
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100 | }
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101 | }
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102 | polygon.closePath();
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103 | return polygon;
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104 | }
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105 |
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106 | /**
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107 | * Gets the number of normally straight sides this symbol has. Returns 1 for a circle.
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108 | * @return The sides of the symbol
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109 | */
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110 | public int getSides() {
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111 | return sides;
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112 | }
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113 |
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114 | /**
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115 | * Gets the rotation of the first point of this symbol.
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116 | * @return The rotation
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117 | */
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118 | public double getRotation() {
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119 | return rotation;
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120 | }
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121 |
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122 | /**
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123 | * Get the MapCSS name for this shape
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124 | * @return The name
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125 | */
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126 | public String getName() {
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127 | return name;
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128 | }
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129 |
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130 | /**
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131 | * Get the shape with the given name
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132 | * @param val The name to search
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133 | * @return The shape as optional
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134 | */
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135 | public static Optional<SymbolShape> forName(String val) {
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136 | return Stream.of(values()).filter(shape -> val.equals(shape.name)).findAny();
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137 | }
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138 | }
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