Mercurial > silverbladetech

annotate Chronosv2/source/Presentation/Controls/SplitButton.cs @ 26:045dac571339

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Working on data binding to a user control
author adminsh@apollo
date Wed, 21 Mar 2012 15:39:53 +0000
parents 09d18d6e5f40
children
rev   line source
19
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1 using System.ComponentModel;
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2 using System.Windows;
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3 using System.Windows.Controls;
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4 using System.Windows.Controls.Primitives;
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5 using System.Windows.Markup;
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6
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7 namespace Chronos.Presentation.Controls
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8 {
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9 /// <summary>
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10 /// Implemetation of a Split Button
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11 /// </summary>
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12 [ContentProperty("Items")]
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13 [DefaultProperty("Items")]
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14 public partial class SplitButton
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15 : Button
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16 {
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17 #region · Dependency Properties ·
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18
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19 // AddOwner Dependency properties
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20 public static readonly DependencyProperty IsContextMenuOpenProperty =
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21 DependencyProperty.Register(
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22 "IsContextMenuOpen",
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23 typeof(bool),
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24 typeof(SplitButton),
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25 new FrameworkPropertyMetadata(false,
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26 new PropertyChangedCallback(OnIsContextMenuOpenChanged)));
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27
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28 public static readonly DependencyProperty PlacementProperty =
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29 ContextMenuService.PlacementProperty.AddOwner(
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30 typeof(SplitButton),
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31 new FrameworkPropertyMetadata(PlacementMode.Bottom,
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32 new PropertyChangedCallback(OnPlacementChanged)));
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33
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34 public static readonly DependencyProperty PlacementRectangleProperty =
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35 ContextMenuService.PlacementRectangleProperty.AddOwner(
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36 typeof(SplitButton),
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37 new FrameworkPropertyMetadata(Rect.Empty,
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38 new PropertyChangedCallback(OnPlacementRectangleChanged)));
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39
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40 public static readonly DependencyProperty HorizontalOffsetProperty =
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41 ContextMenuService.HorizontalOffsetProperty.AddOwner(
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42 typeof(SplitButton),
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43 new FrameworkPropertyMetadata(0.0,
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44 new PropertyChangedCallback(OnHorizontalOffsetChanged)));
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45
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46 public static readonly DependencyProperty VerticalOffsetProperty =
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47 ContextMenuService.VerticalOffsetProperty.AddOwner(
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48 typeof(SplitButton),
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49 new FrameworkPropertyMetadata(0.0,
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50 new PropertyChangedCallback(OnVerticalOffsetChanged)));
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51
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52 #endregion
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53
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54 #region · Dependency Properties Callbacks ·
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55
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56 private static void OnIsContextMenuOpenChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
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57 {
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58 SplitButton s = (SplitButton)d;
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59 s.EnsureContextMenuIsValid();
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60
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61 if (!s.ContextMenu.HasItems)
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62 {
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63 return;
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64 }
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65
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66 bool value = (bool)e.NewValue;
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67
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68 if (value && !s.ContextMenu.IsOpen)
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69 {
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70 s.ContextMenu.IsOpen = true;
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71 }
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72 else if (!value && s.ContextMenu.IsOpen)
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73 {
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74 s.ContextMenu.IsOpen = false;
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75 }
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76 }
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77
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78 /// <summary>
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79 /// Placement Property changed callback, pass the value through to the buttons context menu
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80 /// </summary>
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81 private static void OnPlacementChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
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82 {
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83 SplitButton s = d as SplitButton;
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84
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85 if (s == null)
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86 {
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87 return;
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88 }
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89
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90 s.EnsureContextMenuIsValid();
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91 s.ContextMenu.Placement = (PlacementMode)e.NewValue;
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92 }
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93
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94 /// <summary>
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95 /// PlacementRectangle Property changed callback, pass the value through to the buttons context menu
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96 /// </summary>
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97 private static void OnPlacementRectangleChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
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98 {
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99 SplitButton s = d as SplitButton;
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100
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101 if (s == null)
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102 {
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103 return;
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104 }
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105
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106 s.EnsureContextMenuIsValid();
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107 s.ContextMenu.PlacementRectangle = (Rect)e.NewValue;
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108 }
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109
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110 /// <summary>
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111 /// HorizontalOffset Property changed callback, pass the value through to the buttons context menu
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112 /// </summary>
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113 private static void OnHorizontalOffsetChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
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114 {
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115 SplitButton s = d as SplitButton;
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116
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117 if (s == null)
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118 {
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119 return;
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120 }
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121
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122 s.EnsureContextMenuIsValid();
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123 s.ContextMenu.HorizontalOffset = (double)e.NewValue;
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124 }
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125
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126 /// <summary>
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127 /// VerticalOffset Property changed callback, pass the value through to the buttons context menu
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128 /// </summary>
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129 private static void OnVerticalOffsetChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
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130 {
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131 SplitButton s = d as SplitButton;
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132 if (s == null)
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133 {
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134 return;
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135 }
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136
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137 s.EnsureContextMenuIsValid();
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138 s.ContextMenu.VerticalOffset = (double)e.NewValue;
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139 }
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140
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141 #endregion
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142
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143 #region · Static Constructor ·
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144
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145 /// <summary>
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146 /// Static Constructor
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147 /// </summary>
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148 static SplitButton()
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149 {
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150 DefaultStyleKeyProperty.OverrideMetadata(
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151 typeof(SplitButton),
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152 new FrameworkPropertyMetadata(typeof(SplitButton)));
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153 }
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154
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155 #endregion
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156
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157 #region · Properties ·
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158
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159 /// <summary>
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160 /// The Split Button's Items property maps to the base classes ContextMenu.Items property
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161 /// </summary>
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162 public ItemCollection Items
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163 {
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164 get
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165 {
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166 this.EnsureContextMenuIsValid();
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167
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168 return this.ContextMenu.Items;
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169 }
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170 }
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171
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172 /// <summary>
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173 /// Gets or sets the IsContextMenuOpen property.
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174 /// </summary>
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175 public bool IsContextMenuOpen
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176 {
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177 get { return (bool)GetValue(IsContextMenuOpenProperty); }
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178 set { SetValue(IsContextMenuOpenProperty, value); }
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179 }
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180
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181 /// <summary>
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182 /// Placement of the Context menu
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183 /// </summary>
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184 public PlacementMode Placement
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185 {
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186 get { return (PlacementMode)GetValue(PlacementProperty); }
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187 set { SetValue(PlacementProperty, value); }
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188 }
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189
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190 /// <summary>
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191 /// PlacementRectangle of the Context menu
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192 /// </summary>
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193 public Rect PlacementRectangle
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194 {
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195 get { return (Rect)GetValue(PlacementRectangleProperty); }
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196 set { SetValue(PlacementRectangleProperty, value); }
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197 }
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198
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199 /// <summary>
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200 /// HorizontalOffset of the Context menu
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201 /// </summary>
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202 public double HorizontalOffset
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203 {
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204 get { return (double)GetValue(HorizontalOffsetProperty); }
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205 set { SetValue(HorizontalOffsetProperty, value); }
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206 }
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207
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208 /// <summary>
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209 /// VerticalOffset of the Context menu
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210 /// </summary>
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211 public double VerticalOffset
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212 {
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213 get { return (double)GetValue(VerticalOffsetProperty); }
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214 set { SetValue(VerticalOffsetProperty, value); }
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215 }
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216
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217 #endregion
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218
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219 #region · Constructors ·
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220
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221 public SplitButton()
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222 : base()
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223 {
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224 }
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225
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226 #endregion
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227
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228 #region · Overriden Methods ·
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229
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230 /// <summary>
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231 /// Handles the Base Buttons OnClick event
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232 /// </summary>
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233 protected override void OnClick()
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234 {
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235 this.OnDropdown();
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236 }
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237
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238 #endregion
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239
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240 #region · Private Methods ·
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241
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242 /// <summary>
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243 /// Make sure the Context menu is not null
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244 /// </summary>
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245 private void EnsureContextMenuIsValid()
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246 {
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247 if (this.ContextMenu == null)
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248 {
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249 this.ContextMenu = new ContextMenu();
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250 this.ContextMenu.PlacementTarget = this;
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251 this.ContextMenu.Placement = this.Placement;
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252
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253 this.ContextMenu.Opened += ((sender, routedEventArgs) => IsContextMenuOpen = true);
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254 this.ContextMenu.Closed += ((sender, routedEventArgs) => IsContextMenuOpen = false);
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255 }
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256 }
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257
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258 private void OnDropdown()
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259 {
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260 this.EnsureContextMenuIsValid();
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261
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262 if (!this.ContextMenu.HasItems)
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263 {
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264 return;
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265 }
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266
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267 this.ContextMenu.IsOpen = !IsContextMenuOpen; // open it if closed, close it if open
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268 }
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269
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270 #endregion
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271 }
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272 }