Mercurial > silverbladetech

annotate Chronosv2/source/Presentation/Windows/RubberbandAdorner.cs @ 19:09d18d6e5f40

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airport work
author stevenh7776 stevenhollidge@hotmail.com
date Thu, 15 Mar 2012 06:59:15 +0000
parents 443821e55f06
children
rev   line source
10
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1 /*
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2 The MIT License
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3
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4 Copyright (c) 2009-2010. Carlos Guzmán Álvarez. http://chronoswpf.codeplex.com/
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5
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6 Permission is hereby granted, free of charge, to any person obtaining a copy
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7 of this software and associated documentation files (the "Software"), to deal
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8 in the Software without restriction, including without limitation the rights
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9 to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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10 copies of the Software, and to permit persons to whom the Software is
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11 furnished to do so, subject to the following conditions:
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12
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13 The above copyright notice and this permission notice shall be included in
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14 all copies or substantial portions of the Software.
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15
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16 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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17 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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18 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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19 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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20 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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21 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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22 THE SOFTWARE.
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23 */
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24
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25 using System;
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26 using System.Windows;
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27 using System.Windows.Documents;
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28 using System.Windows.Input;
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29 using System.Windows.Media;
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30 using Chronos.Presentation.Windows.Controls;
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31
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32 namespace Chronos.Presentation.Windows
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33 {
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34 /// <summary>
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35 /// Addorner for the rubber band selection
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36 /// </summary>
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37 public class RubberbandAdorner : Adorner
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38 {
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39 #region · Fields ·
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40
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41 private Point? startPoint;
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42 private Point? endPoint;
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43 private Pen rubberbandPen;
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44 private Desktop desktop;
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45 private Brush backgroundBrush;
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46
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47 #endregion
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48
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49 #region · Constructors ·
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50
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51 /// <summary>
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52 /// Initializes a new instance of the <see cref="RubberbandAdorner"/> class.
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53 /// </summary>
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54 /// <param name="canvas">The canvas.</param>
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55 /// <param name="dragStartPoint">The drag start point.</param>
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56 public RubberbandAdorner(Desktop canvas, Point? dragStartPoint)
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57 : base(canvas)
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58 {
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59 ColorConverter cconverter = new ColorConverter();
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60
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61 this.desktop = canvas;
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62 this.startPoint = dragStartPoint;
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63 this.rubberbandPen = new Pen(new SolidColorBrush((Color)cconverter.ConvertFrom("#FF7AA3D4")), 1);
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64 this.rubberbandPen.DashStyle = new DashStyle();
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65 this.backgroundBrush = new SolidColorBrush((Color)cconverter.ConvertFrom("#FFC5D5E9"));
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66 this.backgroundBrush.Opacity = 0.40;
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67 }
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68
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69 #endregion
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70
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71 #region · Protected Methods ·
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72
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73 /// <summary>
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74 /// Invoked when an unhandled <see cref="E:System.Windows.Input.Mouse.MouseMove"/> attached event reaches an element in its route that is derived from this class. Implement this method to add class handling for this event.
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75 /// </summary>
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76 /// <param name="e">The <see cref="T:System.Windows.Input.MouseEventArgs"/> that contains the event data.</param>
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77 protected override void OnMouseMove(System.Windows.Input.MouseEventArgs e)
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78 {
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79 if (e.LeftButton == MouseButtonState.Pressed)
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80 {
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81 if (!this.IsMouseCaptured)
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82 {
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83 this.CaptureMouse();
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84 }
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85
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86 endPoint = e.GetPosition(this);
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87
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88 this.UpdateSelection();
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89 this.InvalidateVisual();
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90 }
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91 else
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92 {
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93 if (this.IsMouseCaptured)
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94 {
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95 this.ReleaseMouseCapture();
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96 }
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97 }
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98
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99 e.Handled = true;
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100 }
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101
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102 /// <summary>
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103 /// Invoked when an unhandled <see cref="E:System.Windows.Input.Mouse.MouseUp"/> routed event
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104 /// reaches an element in its route that is derived from this class.
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105 /// Implement this method to add class handling for this event.
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106 /// </summary>
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107 /// <param name="e">The <see cref="T:System.Windows.Input.MouseButtonEventArgs"/> that contains the event data.
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108 /// The event data reports that the mouse button was released.</param>
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109 protected override void OnMouseUp(System.Windows.Input.MouseButtonEventArgs e)
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110 {
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111 // release mouse capture
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112 if (this.IsMouseCaptured)
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113 {
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114 this.ReleaseMouseCapture();
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115 }
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116
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117 // remove this adorner from adorner layer
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118 AdornerLayer adornerLayer = AdornerLayer.GetAdornerLayer(this.desktop);
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119 if (adornerLayer != null)
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120 {
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121 adornerLayer.Remove(this);
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122 }
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123
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124 e.Handled = true;
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125 }
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126
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127 /// <summary>
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128 /// When overridden in a derived class, participates in rendering operations that are directed by the layout system. The rendering instructions for this element are not used directly when this method is invoked, and are instead preserved for later asynchronous use by layout and drawing.
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129 /// </summary>
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130 /// <param name="drawingContext">The drawing instructions for a specific element. This context is provided to the layout system.</param>
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131 protected override void OnRender(DrawingContext drawingContext)
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132 {
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133 base.OnRender(drawingContext);
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134
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135 // without a background the OnMouseMove event would not be fired!
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136 // Alternative: implement a Canvas as a child of this adorner, like
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137 // the ConnectionAdorner does.
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138 drawingContext.DrawRectangle(Brushes.Transparent, null, new Rect(RenderSize));
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139
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140 if (this.startPoint.HasValue && this.endPoint.HasValue)
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141 {
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142 drawingContext.DrawRectangle(this.backgroundBrush, rubberbandPen, new Rect(this.startPoint.Value, this.endPoint.Value));
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143 }
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144 }
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145
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146 #endregion
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147
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148 #region · Private Methods ·
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149
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150 private void UpdateSelection()
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151 {
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152 desktop.SelectionService.ClearSelection();
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153
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154 Rect rubberBand = new Rect(startPoint.Value, endPoint.Value);
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155
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156 foreach (UIElement item in desktop.Children)
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157 {
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158 Rect itemRect = VisualTreeHelper.GetDescendantBounds(item);
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159 Rect itemBounds = item.TransformToAncestor(desktop).TransformBounds(itemRect);
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160
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161 if (rubberBand.Contains(itemBounds))
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162 {
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163 if (item is ISelectable)
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164 {
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165 ISelectable di = item as ISelectable;
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166
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167 if (di.ParentId == Guid.Empty)
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168 {
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169 desktop.SelectionService.AddToSelection(di);
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170 }
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171 }
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172 }
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173 }
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174 }
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175
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176 #endregion
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177 }
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178 }