1 | using System;
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2 | using System.Collections.Generic;
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3 | using System.Text;
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4 |
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5 | namespace Netron.Diagramming.Core
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6 | {
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7 | /// <summary>
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8 | /// Implements the ILayer interface/mechanism
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9 | /// </summary>
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10 | public partial class Layer : ILayer, IVersion
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11 | {
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12 | #region Events
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13 | /// <summary>
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14 | /// Occurs when an entity is added to the layer
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15 | /// </summary>
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16 | public event EventHandler<EntityEventArgs> OnEntityAdded;
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17 | /// <summary>
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18 | /// Occurs when an entity is removed from the layer
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19 | /// </summary>
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20 | public event EventHandler<EntityEventArgs> OnEntityRemoved;
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21 | /// <summary>
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22 | /// Occurs when the layer is cleared
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23 | /// </summary>
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24 | public event EventHandler OnClear;
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25 | #endregion
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26 |
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27 | #region Fields
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28 |
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29 | // ------------------------------------------------------------------
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30 | /// <summary>
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31 | /// Implementation of IVersion - the current version of
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32 | /// Layer.
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33 | /// </summary>
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34 | // ------------------------------------------------------------------
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35 | protected const double layerVersion = 1.0;
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36 |
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37 | // ------------------------------------------------------------------
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38 | /// <summary>
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39 | /// the Model field
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40 | /// </summary>
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41 | // ------------------------------------------------------------------
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42 | [NonSerialized]
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43 | private IModel mModel;
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44 |
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45 | // ------------------------------------------------------------------
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46 | /// <summary>
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47 | /// the Entities field
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48 | /// </summary>
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49 | // ------------------------------------------------------------------
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50 | private CollectionBase<IDiagramEntity> mEntities;
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51 |
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52 | // ------------------------------------------------------------------
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53 | /// <summary>
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54 | /// the Name field
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55 | /// </summary>
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56 | // ------------------------------------------------------------------
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57 | private string mName;
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58 |
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59 | // ------------------------------------------------------------------
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60 | /// <summary>
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61 | /// Specifies if this layer and all of its entities are drawn.
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62 | /// </summary>
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63 | // ------------------------------------------------------------------
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64 | protected bool mIsVisible = true;
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65 |
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66 | #endregion
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67 |
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68 | #region Properties
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69 |
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70 | // ------------------------------------------------------------------
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71 | /// <summary>
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72 | /// Gets the current version.
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73 | /// </summary>
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74 | // ------------------------------------------------------------------
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75 | public virtual double Version
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76 | {
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77 | get
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78 | {
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79 | return layerVersion;
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80 | }
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81 | }
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82 |
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83 | // ------------------------------------------------------------------
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84 | /// <summary>
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85 | /// Gets or sets if this layer and all of its entities are drawn.
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86 | /// </summary>
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87 | // ------------------------------------------------------------------
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88 | public bool IsVisible
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89 | {
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90 | get
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91 | {
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92 | return mIsVisible;
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93 | }
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94 | set
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95 | {
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96 | mIsVisible = value;
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97 | }
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98 | }
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99 |
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100 | // ------------------------------------------------------------------
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101 | /// <summary>
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102 | /// Gets all shapes in this layer.
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103 | /// </summary>
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104 | // ------------------------------------------------------------------
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105 | public CollectionBase<IShape> Shapes
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106 | {
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107 | get
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108 | {
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109 | CollectionBase<IShape> shapes = new CollectionBase<IShape>();
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110 | foreach (IDiagramEntity entity in mEntities)
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111 | {
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112 | if (entity is IShape)
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113 | shapes.Add(entity as IShape);
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114 | }
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115 | return shapes;
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116 | }
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117 | }
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118 |
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119 | // ------------------------------------------------------------------
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120 | /// <summary>
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121 | /// Gets all connections in this layer.
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122 | /// </summary>
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123 | // ------------------------------------------------------------------
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124 | public CollectionBase<IConnection> Connections
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125 | {
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126 | get
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127 | {
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128 | CollectionBase<IConnection> cons = new CollectionBase<IConnection>();
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129 | foreach (IDiagramEntity entity in mEntities)
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130 | {
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131 | if (entity is IConnection)
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132 | cons.Add(entity as IConnection);
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133 | }
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134 | return cons;
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135 | }
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136 | }
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137 |
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138 | // ------------------------------------------------------------------
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139 | /// <summary>
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140 | /// Gets or sets the Model
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141 | /// </summary>
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142 | // ------------------------------------------------------------------
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143 | public IModel Model
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144 | {
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145 | get { return mModel; }
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146 | set
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147 | {
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148 | if (value == null)
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149 | throw new InconsistencyException("The model you want to set has value 'null'.");
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150 |
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151 | mModel = value;
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152 | foreach (IDiagramEntity entity in mEntities)
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153 | entity.Model = value;
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154 | }
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155 | }
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156 |
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157 | // ------------------------------------------------------------------
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158 | /// <summary>
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159 | /// Gets or sets the Name
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160 | /// </summary>
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161 | // ------------------------------------------------------------------
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162 | public string Name
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163 | {
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164 | get { return mName; }
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165 | set { mName = value; }
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166 | }
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167 |
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168 | // ------------------------------------------------------------------
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169 | /// <summary>
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170 | /// Gets or sets the Entities
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171 | /// </summary>
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172 | // ------------------------------------------------------------------
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173 | public CollectionBase<IDiagramEntity> Entities
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174 | {
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175 | get { return mEntities; }
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176 | //set { mEntities = value; }
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177 | }
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178 |
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179 |
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180 | #endregion
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181 |
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182 | #region Constructor
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183 |
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184 | // ------------------------------------------------------------------
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185 | /// <summary>
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186 | /// Initializes a new instance of the <see cref="T:Layer"/> class.
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187 | /// </summary>
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188 | /// <param name="name">The name.</param>
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189 | // ------------------------------------------------------------------
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190 | public Layer(string name)
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191 | {
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192 | mName = name;
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193 | mEntities = new CollectionBase<IDiagramEntity>();
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194 | Init();
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195 | }
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196 | private void AttachToEntityCollection(CollectionBase<IDiagramEntity> collection)
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197 | {
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198 | collection.OnItemAdded += new EventHandler<CollectionEventArgs<IDiagramEntity>>(mEntities_OnItemAdded);
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199 | collection.OnItemRemoved += new EventHandler<CollectionEventArgs<IDiagramEntity>>(mEntities_OnItemRemoved);
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200 | collection.OnClear += new EventHandler(mEntities_OnClear);
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201 | }
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202 | /// <summary>
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203 | /// Initializes this object
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204 | /// <remarks>See also the <see cref="OnDeserialized"/> event for post-deserialization actions to which this method is related.
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205 | /// </remarks>
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206 | /// </summary>
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207 | private void Init()
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208 | {
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209 | if (mEntities == null)
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210 | throw new InconsistencyException("The entity collection is 'null'");
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211 | AttachToEntityCollection(mEntities);
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212 | }
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213 | /// <summary>
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214 | /// Handles the OnClear event of the Entities.
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215 | /// </summary>
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216 | /// <param name="sender">The source of the event.</param>
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217 | /// <param name="e">The <see cref="T:System.EventArgs"/> instance containing the event data.</param>
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218 | void mEntities_OnClear(object sender, EventArgs e)
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219 | {
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220 | EventHandler handler = OnClear;
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221 | if (handler != null)
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222 | handler(sender, e);
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223 | }
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224 |
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225 | /// <summary>
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226 | /// Handles the OnItemRemoved event of the Entities
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227 | /// </summary>
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228 | /// <param name="sender">The sender.</param>
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229 | /// <param name="e">The e.</param>
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230 | void mEntities_OnItemRemoved(object sender, CollectionEventArgs<IDiagramEntity> e)
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231 | {
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232 | EventHandler<EntityEventArgs> handler = OnEntityRemoved;
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233 | if (handler != null)
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234 | handler(this, new EntityEventArgs(e.Item));
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235 | }
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236 |
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237 | /// <summary>
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238 | /// Bubbles the event up
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239 | /// </summary>
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240 | /// <param name="sender"></param>
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241 | /// <param name="e"></param>
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242 | void mEntities_OnItemAdded(object sender, CollectionEventArgs<IDiagramEntity> e)
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243 | {
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244 | EventHandler<EntityEventArgs> handler = OnEntityAdded;
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245 | if (handler != null)
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246 | handler(this, new EntityEventArgs(e.Item));
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247 | }
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248 | #endregion
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249 | }
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250 | }
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