1 | using System;
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2 | using System.Collections;
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3 | using System.Collections.Generic;
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4 | using System.Text;
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5 | using System.Drawing;
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6 | using System.Drawing.Drawing2D;
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7 | using System.IO;
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8 | using System.Diagnostics;
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9 | using System.Runtime.Serialization;
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10 | namespace Netron.Diagramming.Core
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11 | {
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12 | /// <summary>
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13 | /// Static class of utility methods
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14 | /// </summary>
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15 | public static class Utils
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16 | {
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17 | public static void DrawRoundRect(Graphics g, Pen p, Rectangle rectangle)
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18 | {
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19 | DrawRoundRect(g, p, rectangle.X, rectangle.Y, rectangle.Width, rectangle.Height, 7F);
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20 | }
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21 | public static void DrawRoundRect(Graphics g, Pen p, float X, float Y, float width, float height, float radius)
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22 | {
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23 |
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24 | GraphicsPath path = new GraphicsPath();
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25 | path.AddLine(X + radius, Y, X + width - (radius * 2), Y);
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26 | path.AddArc(X + width - (radius * 2), Y, radius * 2, radius * 2, 270, 90);
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27 | path.AddLine(X + width, Y + radius, X + width, Y + height - (radius * 2));
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28 | path.AddArc(X + width - (radius * 2), Y + height - (radius * 2), radius * 2, radius * 2, 0, 90);
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29 | path.AddLine(X + width - (radius * 2), Y + height, X + radius, Y + height);
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30 | path.AddArc(X, Y + height - (radius * 2), radius * 2, radius * 2, 90, 90);
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31 | path.AddLine(X, Y + height - (radius * 2), X, Y + radius);
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32 | path.AddArc(X, Y, radius * 2, radius * 2, 180, 90);
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33 | path.CloseFigure();
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34 |
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35 | g.DrawPath(p, path);
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36 | path.Dispose();
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37 | }
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38 |
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39 | /// <summary>
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40 | /// Returns the bounding rectangle of the given collection of entities.
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41 | /// </summary>
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42 | /// <param name="collection"></param>
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43 | /// <returns></returns>
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44 | public static Rectangle BoundingRectangle(CollectionBase<IDiagramEntity> collection)
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45 | {
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46 | //get the bounding rectangle
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47 | bool first = true;
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48 | Rectangle rec = Rectangle.Empty;
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49 | foreach (IDiagramEntity entity in collection)
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50 | {
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51 | if (first)
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52 | {
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53 | rec = entity.Rectangle;
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54 | first = false;
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55 | }
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56 | else
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57 | rec = Rectangle.Union(rec, entity.Rectangle);
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58 | }
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59 | return rec;
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60 | }
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61 |
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62 | /// <summary>
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63 | /// Depth-first traversal of an <see cref="IGroup"/>
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64 | /// </summary>
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65 | /// <param name="group"></param>
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66 | /// <param name="collection"></param>
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67 | public static void TraverseCollect(IGroup group, ref CollectionBase<IDiagramEntity> collection)
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68 | {
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69 | #region Checks
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70 | if(group == null)
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71 | throw new InconsistencyException("Cannot collect entities of a 'null' IGroup");
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72 | if(collection == null)
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73 | throw new InconsistencyException("You need to instantiate a collection before using this method.");
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74 | #endregion
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75 |
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76 | foreach(IDiagramEntity entity in group.Entities)
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77 | {
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78 | if(entity is IGroup)
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79 | TraverseCollect(entity as IGroup, ref collection);
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80 | else
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81 | collection.Add(entity);
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82 | }
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83 |
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84 | }
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85 |
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86 | // Given H,S,L in range of 0-1
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87 |
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88 | // Returns a Color (RGB struct) in range of 0-255
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89 |
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90 | /// <summary>
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91 | /// HSL to RGB conversion.
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92 | /// </summary>
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93 | /// <param name="h">The h.</param>
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94 | /// <param name="sl">The sl.</param>
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95 | /// <param name="l">The l.</param>
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96 | /// <returns></returns>
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97 | public static ColorRGB HSL2RGB(double h, double sl, double l)
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98 | {
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99 |
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100 | double v;
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101 | double r, g, b;
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102 | r = l; // default to gray
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103 | g = l;
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104 | b = l;
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105 | v = (l <= 0.5) ? (l * (1.0 + sl)) : (l + sl - l * sl);
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106 | if(v > 0)
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107 | {
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108 | double m;
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109 | double sv;
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110 | int sextant;
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111 | double fract, vsf, mid1, mid2;
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112 |
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113 | m = l + l - v;
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114 | sv = (v - m) / v;
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115 | h *= 6.0;
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116 | sextant = (int) h;
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117 | fract = h - sextant;
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118 | vsf = v * sv * fract;
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119 | mid1 = m + vsf;
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120 | mid2 = v - vsf;
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121 | switch(sextant)
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122 | {
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123 | case 0:
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124 | r = v;
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125 | g = mid1;
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126 | b = m;
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127 | break;
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128 | case 1:
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129 | r = mid2;
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130 | g = v;
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131 | b = m;
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132 | break;
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133 | case 2:
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134 | r = m;
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135 | g = v;
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136 | b = mid1;
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137 | break;
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138 | case 3:
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139 | r = m;
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140 | g = mid2;
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141 | b = v;
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142 | break;
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143 | case 4:
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144 | r = mid1;
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145 | g = m;
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146 | b = v;
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147 | break;
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148 | case 5:
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149 | r = v;
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150 | g = m;
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151 | b = mid2;
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152 | break;
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153 | }
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154 | }
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155 | ColorRGB rgb = new ColorRGB();
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156 | rgb.R = Convert.ToByte(r * 255.0f);
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157 | rgb.G = Convert.ToByte(g * 255.0f);
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158 | rgb.B = Convert.ToByte(b * 255.0f);
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159 | return rgb;
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160 |
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161 | }
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162 |
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163 | // Given a Color (RGB Struct) in range of 0-255
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164 |
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165 | // Return H,S,L in range of 0-1
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166 |
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167 | /// <summary>
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168 | /// RGB to HSL conversion
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169 | /// </summary>
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170 | /// <param name="rgb">The RGB.</param>
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171 | /// <param name="h">The h.</param>
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172 | /// <param name="s">The s.</param>
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173 | /// <param name="l">The l.</param>
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174 | public static void RGB2HSL(ColorRGB rgb, out double h, out double s, out double l)
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175 | {
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176 | double r = rgb.R / 255.0;
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177 | double g = rgb.G / 255.0;
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178 | double b = rgb.B / 255.0;
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179 | double v;
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180 | double m;
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181 | double vm;
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182 | double r2, g2, b2;
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183 |
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184 | h = 0; // default to black
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185 | s = 0;
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186 | l = 0;
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187 | v = Math.Max(r, g);
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188 | v = Math.Max(v, b);
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189 | m = Math.Min(r, g);
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190 | m = Math.Min(m, b);
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191 |
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192 | l = (m + v) / 2.0;
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193 | if(l <= 0.0)
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194 | {
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195 | return;
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196 | }
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197 | vm = v - m;
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198 | s = vm;
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199 | if(s > 0.0)
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200 | {
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201 | s /= (l <= 0.5) ? (v + m) : (2.0 - v - m);
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202 | }
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203 | else
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204 | {
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205 | return;
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206 | }
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207 | r2 = (v - r) / vm;
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208 | g2 = (v - g) / vm;
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209 | b2 = (v - b) / vm;
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210 | if(r == v)
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211 | {
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212 | h = (g == m ? 5.0 + b2 : 1.0 - g2);
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213 | }
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214 | else if(g == v)
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215 | {
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216 | h = (b == m ? 1.0 + r2 : 3.0 - b2);
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217 | }
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218 | else
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219 | {
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220 | h = (r == m ? 3.0 + g2 : 5.0 - r2);
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221 | }
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222 | h /= 6.0;
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223 | }
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224 | /// <summary>
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225 | /// Constrains the type.
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226 | /// </summary>
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227 | /// <param name="type">The type.</param>
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228 | public static void ConstrainType(Type type)
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229 | {
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230 | bool serializable = type.IsSerializable;
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231 | if(serializable == false)
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232 | {
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233 | string message = "The type " + type + " is not serializable";
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234 | throw new SerializationException(message);
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235 | }
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236 | bool genericType = type.IsGenericType;
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237 |
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238 | if(genericType)
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239 | {
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240 | Type[] typeArguments = type.GetGenericArguments();
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241 | Debug.Assert(typeArguments.Length >= 1);
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242 | Array.ForEach(typeArguments, ConstrainType);
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243 | }
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244 | }
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245 |
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246 |
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247 | }
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248 | /// <summary>
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249 | /// Utility struct for color conversions
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250 | /// </summary>
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251 | public struct ColorRGB
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252 | {
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253 | #region Fields
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254 | private byte r;
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255 | private byte g;
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256 | private byte b;
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257 | #endregion
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258 |
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259 | /// <summary>
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260 | /// Gets or sets the Red value.
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261 | /// </summary>
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262 | /// <value>The R.</value>
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263 | public byte R
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264 | {
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265 | get { return r; }
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266 | set { r = value; }
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267 | }
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268 |
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269 |
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270 | /// <summary>
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271 | /// Gets or sets the Green value.
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272 | /// </summary>
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273 | /// <value>The G.</value>
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274 | public byte G
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275 | {
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276 | get { return g; }
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277 | set { g = value; }
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278 | }
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279 |
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280 |
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281 |
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282 | /// <summary>
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283 | /// Gets or sets the Blue value.
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284 | /// </summary>
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285 | /// <value>The B.</value>
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286 | public byte B
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287 | {
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288 | get { return b; }
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289 | set { b = value; }
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290 | }
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291 | /// <summary>
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292 | /// Initializes a new instance of the <see cref="T:ColorRGB"/> class.
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293 | /// </summary>
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294 | /// <param name="value">The value.</param>
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295 | public ColorRGB(Color value)
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296 | {
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297 | this.r = value.R;
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298 | this.g = value.G;
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299 | this.b = value.B;
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300 | }
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301 | /// <summary>
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302 | /// Implicit conversion of the specified RGB.
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303 | /// </summary>
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304 | /// <param name="rgb">The RGB.</param>
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305 | /// <returns></returns>
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306 | public static implicit operator Color(ColorRGB rgb)
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307 | {
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308 | Color c = Color.FromArgb(rgb.R, rgb.G, rgb.B);
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309 | return c;
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310 | }
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311 | /// <summary>
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312 | /// Explicit conversion of the specified c.
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313 | /// </summary>
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314 | /// <param name="c">The c.</param>
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315 | /// <returns></returns>
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316 | public static explicit operator ColorRGB(Color c)
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317 | {
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318 | return new ColorRGB(c);
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319 | }
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320 | }
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321 |
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322 |
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323 |
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324 |
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325 | }
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