1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
|
/*************************************************************************************
Extended WPF Toolkit
Copyright (C) 2007-2013 Xceed Software Inc.
This program is provided to you under the terms of the Microsoft Public
License (Ms-PL) as published at http://wpftoolkit.codeplex.com/license
For more features, controls, and fast professional support,
pick up the Plus Edition at http://xceed.com/wpf_toolkit
Stay informed: follow @datagrid on Twitter or Like http://facebook.com/datagrids
***********************************************************************************/
using System;
using System.Diagnostics;
using System.Windows;
using System.Windows.Media;
using System.Windows.Shapes;
using Xceed.Wpf.Toolkit.Core.Utilities;
namespace Xceed.Wpf.Toolkit.Primitives
{
public abstract class ShapeBase : Shape
{
#region Constructors
static ShapeBase()
{
ShapeBase.StrokeDashArrayProperty.OverrideMetadata( typeof( ShapeBase ), new FrameworkPropertyMetadata( new PropertyChangedCallback( ShapeBase.OnStrokeChanged ) ) );
ShapeBase.StrokeDashCapProperty.OverrideMetadata( typeof( ShapeBase ), new FrameworkPropertyMetadata( new PropertyChangedCallback( ShapeBase.OnStrokeChanged ) ) );
ShapeBase.StrokeDashOffsetProperty.OverrideMetadata( typeof( ShapeBase ), new FrameworkPropertyMetadata( new PropertyChangedCallback( ShapeBase.OnStrokeChanged ) ) );
ShapeBase.StrokeEndLineCapProperty.OverrideMetadata( typeof( ShapeBase ), new FrameworkPropertyMetadata( new PropertyChangedCallback( ShapeBase.OnStrokeChanged ) ) );
ShapeBase.StrokeLineJoinProperty.OverrideMetadata( typeof( ShapeBase ), new FrameworkPropertyMetadata( new PropertyChangedCallback( ShapeBase.OnStrokeChanged ) ) );
ShapeBase.StrokeMiterLimitProperty.OverrideMetadata( typeof( ShapeBase ), new FrameworkPropertyMetadata( new PropertyChangedCallback( ShapeBase.OnStrokeChanged ) ) );
ShapeBase.StrokeProperty.OverrideMetadata( typeof( ShapeBase ), new FrameworkPropertyMetadata( new PropertyChangedCallback( ShapeBase.OnStrokeChanged ) ) );
ShapeBase.StrokeStartLineCapProperty.OverrideMetadata( typeof( ShapeBase ), new FrameworkPropertyMetadata( new PropertyChangedCallback( ShapeBase.OnStrokeChanged ) ) );
ShapeBase.StrokeThicknessProperty.OverrideMetadata( typeof( ShapeBase ), new FrameworkPropertyMetadata( new PropertyChangedCallback( ShapeBase.OnStrokeChanged ) ) );
}
#endregion
#region IsPenEmptyOrUndefined Internal Property
internal bool IsPenEmptyOrUndefined
{
get
{
double strokeThickness = this.StrokeThickness;
return ( this.Stroke == null ) || DoubleHelper.IsNaN( strokeThickness ) || DoubleHelper.AreVirtuallyEqual( 0, strokeThickness );
}
}
#endregion
#region DefiningGeometry Protected Property
protected abstract override Geometry DefiningGeometry
{
get;
}
#endregion
internal virtual Rect GetDefiningGeometryBounds()
{
Geometry geometry = this.DefiningGeometry;
Debug.Assert( geometry != null );
return geometry.Bounds;
}
internal virtual Size GetNaturalSize()
{
Geometry geometry = this.DefiningGeometry;
Debug.Assert( geometry != null );
Rect bounds = geometry.GetRenderBounds( GetPen() );
return new Size( Math.Max( bounds.Right, 0 ), Math.Max( bounds.Bottom, 0 ) );
}
internal Pen GetPen()
{
if( this.IsPenEmptyOrUndefined )
return null;
if( _pen == null )
{
_pen = this.MakePen();
}
return _pen;
}
internal double GetStrokeThickness()
{
if( this.IsPenEmptyOrUndefined )
return 0d;
return Math.Abs( this.StrokeThickness );
}
internal bool IsSizeEmptyOrUndefined( Size size )
{
return ( DoubleHelper.IsNaN( size.Width ) || DoubleHelper.IsNaN( size.Height ) || size.IsEmpty );
}
private static void OnStrokeChanged( DependencyObject d, DependencyPropertyChangedEventArgs e )
{
( ( ShapeBase )d )._pen = null;
}
private Pen MakePen()
{
Pen pen = new Pen();
pen.Brush = this.Stroke;
pen.DashCap = this.StrokeDashCap;
if( this.StrokeDashArray != null || this.StrokeDashOffset != 0.0 )
{
pen.DashStyle = new DashStyle( this.StrokeDashArray, this.StrokeDashOffset );
}
pen.EndLineCap = this.StrokeEndLineCap;
pen.LineJoin = this.StrokeLineJoin;
pen.MiterLimit = this.StrokeMiterLimit;
pen.StartLineCap = this.StrokeStartLineCap;
pen.Thickness = Math.Abs( this.StrokeThickness );
return pen;
}
#region Private Fields
private Pen _pen = null;
#endregion
}
}
|
