Mercurial > silverbladetech

annotate Chronosv2/source/DragAndDrop/DragAdorner.cs @ 21:dfc81f8bb838

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working version for sttocks except ui within metrowpf
author adminsh@apollo
date Tue, 20 Mar 2012 15:07:31 +0000
parents 443821e55f06
children
rev   line source
10
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1 using System.Windows;
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2 using System.Windows.Documents;
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3 using System.Windows.Media;
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4 using System.Windows.Shapes;
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5
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6 namespace Chronos.Presentation.DragAndDrop
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7 {
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8 public sealed class DragAdorner : Adorner
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9 {
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10 #region · Fields ·
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11
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12 private UIElement child;
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13 private UIElement owner;
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14 private double XCenter;
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15 private double YCenter;
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16 private double topOffset;
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17 private double leftOffset;
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18
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19 #endregion
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20
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21 #region · Properties ·
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22
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23 public double LeftOffset
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24 {
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25 get { return this.leftOffset; }
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26 set
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27 {
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28 this.leftOffset = (value - this.XCenter);
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29 this.UpdatePosition();
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30 }
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31 }
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32
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33 public double TopOffset
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34 {
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35 get { return this.topOffset; }
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36 set
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37 {
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38 this.topOffset = (value - this.YCenter);
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39 this.UpdatePosition();
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40 }
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41 }
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42
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43 #endregion
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44
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45 #region · Protected Properties ·
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46
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47 protected override int VisualChildrenCount
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48 {
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49 get { return 1; }
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50 }
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51
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52 #endregion
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53
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54 #region · Constructors ·
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55
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56 public DragAdorner(UIElement owner)
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57 : base(owner)
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58 {
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59 }
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60
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61 public DragAdorner(UIElement owner, UIElement adornElement, bool useVisualBrush, double opacity)
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62 : base(owner)
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63 {
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64 this.owner = owner;
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65
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66 if (useVisualBrush)
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67 {
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68 VisualBrush brush = new VisualBrush(adornElement);
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69 Rectangle rect = new Rectangle();
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70
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71 brush.Opacity = opacity;
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72 rect.RadiusX = 3;
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73 rect.RadiusY = 3;
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74 rect.Width = adornElement.DesiredSize.Width;
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75 rect.Height = adornElement.DesiredSize.Height;
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76
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77 this.XCenter = adornElement.DesiredSize.Width / 2;
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78 this.YCenter = adornElement.DesiredSize.Height / 2;
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79
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80 rect.Fill = brush;
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81
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82 this.child = rect;
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83 }
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84 else
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85 {
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86 this.child = adornElement;
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87 }
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88 }
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89
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90 #endregion
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91
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92 #region · Methods ·
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93
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94 public override GeneralTransform GetDesiredTransform(GeneralTransform transform)
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95 {
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96 GeneralTransformGroup result = new GeneralTransformGroup();
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97
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98 result.Children.Add(base.GetDesiredTransform(transform));
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99 result.Children.Add(new TranslateTransform(this.leftOffset, this.topOffset));
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100
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101 return result;
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102 }
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103
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104 #endregion
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105
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106 #region · Protected Methods ·
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107
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108 protected override Visual GetVisualChild(int index)
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109 {
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110 return this.child;
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111 }
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112
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113 protected override Size MeasureOverride(Size finalSize)
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114 {
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115 this.child.Measure(finalSize);
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116
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117 return this.child.DesiredSize;
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118 }
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119
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120 protected override Size ArrangeOverride(Size finalSize)
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121 {
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122 this.child.Arrange(new Rect(this.child.DesiredSize));
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123
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124 return finalSize;
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125 }
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126
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127 #endregion
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128
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129 #region · Private Methods ·
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130
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131 private void UpdatePosition()
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132 {
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133 AdornerLayer adorner = (AdornerLayer)this.Parent;
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134
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135 if (adorner != null)
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136 {
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137 adorner.Update(this.AdornedElement);
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138 }
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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 }