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 | using System.Drawing;
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5 | using System.Drawing.Drawing2D;
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6 |
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7 | namespace Netron.Diagramming.Core
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8 | {
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9 | // ----------------------------------------------------------------------
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10 | /// <summary>
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11 | /// The gradient paint style
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12 | /// </summary>
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13 | // ----------------------------------------------------------------------
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14 | public partial class GradientPaintStyle :
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15 | IPaintStyle,
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16 | IVersion
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17 | {
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18 | // ------------------------------------------------------------------
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19 | /// <summary>
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20 | /// Event raised when this paint style is changed.
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21 | /// </summary>
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22 | // ------------------------------------------------------------------
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23 | public event PaintStyleChangedEventHandler PaintStyleChanged;
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24 |
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25 | #region Fields
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26 |
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27 | // ------------------------------------------------------------------
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28 | /// <summary>
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29 | /// Implementation of IVersion - the current version of
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30 | /// GradientPaintStyle.
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31 | /// </summary>
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32 | // ------------------------------------------------------------------
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33 | protected const double gradientPaintStyleVersion = 1.0;
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34 |
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35 | // ------------------------------------------------------------------
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36 | /// <summary>
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37 | /// the Angle field.
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38 | /// </summary>
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39 | // ------------------------------------------------------------------
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40 | private float mAngle;
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41 |
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42 | // ------------------------------------------------------------------
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43 | /// <summary>
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44 | /// the EndColor field
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45 | /// </summary>
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46 | // ------------------------------------------------------------------
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47 | private Color mEndColor;
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48 |
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49 | // ------------------------------------------------------------------
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50 | /// <summary>
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51 | /// the StartColor field
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52 | /// </summary>
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53 | // ------------------------------------------------------------------
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54 | private Color mStartColor;
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55 |
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56 | #endregion
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57 |
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58 | #region Properties
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59 |
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60 | // ------------------------------------------------------------------
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61 | /// <summary>
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62 | /// Gets the current version.
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63 | /// </summary>
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64 | // ------------------------------------------------------------------
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65 | public virtual double Version
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66 | {
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67 | get
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68 | {
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69 | return gradientPaintStyleVersion;
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70 | }
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71 | }
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72 |
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73 | // ------------------------------------------------------------------
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74 | /// <summary>
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75 | /// Gets or sets the StartColor
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76 | /// </summary>
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77 | // ------------------------------------------------------------------
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78 | public Color StartColor
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79 | {
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80 | get
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81 | {
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82 | return mStartColor;
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83 | }
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84 | set
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85 | {
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86 | mStartColor = value;
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87 | RaisePaintStyleChanged();
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88 | }
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89 | }
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90 |
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91 | // ------------------------------------------------------------------
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92 | /// <summary>
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93 | /// Gets or sets the EndColor
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94 | /// </summary>
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95 | // ------------------------------------------------------------------
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96 | public Color EndColor
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97 | {
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98 | get
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99 | {
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100 | return mEndColor;
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101 | }
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102 | set
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103 | {
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104 | mEndColor = value;
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105 | RaisePaintStyleChanged();
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106 | }
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107 | }
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108 |
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109 | // ------------------------------------------------------------------
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110 | /// <summary>
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111 | /// Gets or sets the Angle
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112 | /// </summary>
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113 | // ------------------------------------------------------------------
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114 | public float Angle
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115 | {
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116 | get
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117 | {
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118 | return mAngle;
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119 | }
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120 | set
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121 | {
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122 | mAngle = value;
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123 | RaisePaintStyleChanged();
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124 | }
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125 | }
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126 | #endregion
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127 |
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128 | #region Constructor
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129 |
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130 | // ------------------------------------------------------------------
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131 | ///<summary>
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132 | ///Default constructor
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133 | ///</summary>
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134 | // ------------------------------------------------------------------
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135 | public GradientPaintStyle(
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136 | Color startColor,
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137 | Color endColor,
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138 | float angle)
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139 | {
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140 | mStartColor = startColor;
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141 | mEndColor = endColor;
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142 | mAngle = angle;
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143 | }
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144 |
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145 | // ------------------------------------------------------------------
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146 | /// <summary>
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147 | /// Initializes a new instance of the
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148 | /// <see cref="T:GradientPaintStyle"/> class.
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149 | /// </summary>
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150 | // ------------------------------------------------------------------
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151 | public GradientPaintStyle()
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152 | {
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153 | mStartColor = ArtPalette.RandomLowSaturationColor;
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154 | mEndColor = Color.White;
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155 | mAngle = -135;
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156 | }
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157 | #endregion
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158 |
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159 | // ------------------------------------------------------------------
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160 | /// <summary>
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161 | /// Gets the brush.
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162 | /// </summary>
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163 | /// <param name="rectangle">The rectangle.</param>
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164 | /// <returns>Brush</returns>
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165 | // ------------------------------------------------------------------
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166 | public Brush GetBrush(Rectangle rectangle)
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167 | {
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168 | if (rectangle.Equals(Rectangle.Empty))
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169 | {
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170 | return new SolidBrush(mStartColor);
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171 | }
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172 | else
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173 | {
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174 | if (rectangle.Width == 0)
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175 | {
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176 | rectangle.Width = 1;
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177 | }
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178 |
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179 | if (rectangle.Height == 0)
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180 | {
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181 | rectangle.Height = 1;
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182 | }
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183 | return new LinearGradientBrush(
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184 | rectangle,
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185 | mStartColor,
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186 | mEndColor,
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187 | mAngle,
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188 | true);
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189 | }
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190 | }
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191 |
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192 | // ------------------------------------------------------------------
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193 | /// <summary>
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194 | /// Raises the PaintStyleChanged event.
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195 | /// </summary>
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196 | // ------------------------------------------------------------------
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197 | protected virtual void RaisePaintStyleChanged()
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198 | {
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199 | if (this.PaintStyleChanged != null)
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200 | {
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201 | // Raise the event
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202 | this.PaintStyleChanged(
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203 | this,
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204 | new PaintStyleChangedEventArgs(
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205 | this,
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206 | FillType.LinearGradient));
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207 | }
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208 | }
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209 | }
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210 | }
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