ScrollChrome.cs source code in C# .NET

Source code for the .NET framework in C#

                        

Code:

/ 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / wpf / src / Themes / Royale / Microsoft / Windows / Themes / ScrollChrome.cs / 1305600 / ScrollChrome.cs

                            //---------------------------------------------------------------------------- 
// File: ScrollChrome.cs
//
// Description:
// Implementation of chrome for scrollbar and combobox buttons and thumbs in Luna. 
//
// Copyright (C) 2004 by Microsoft Corporation.  All rights reserved. 
// 
//---------------------------------------------------------------------------
 
using System;
using System.Windows.Shapes;
using System.Windows.Controls;
using System.Diagnostics; 
using System.Threading;
 
using System.Windows; 
using System.Windows.Media;
using MS.Internal; 

namespace Microsoft.Windows.Themes
{
    ///  
    ///     The ScrollChrome element
    ///     This element is a theme-specific type that is used as an optimization 
    ///     for a common complex rendering used in Luna 
    /// 
    public sealed class ScrollChrome : FrameworkElement 
    {

        #region Constructors
 
        static ScrollChrome()
        { 
            IsEnabledProperty.OverrideMetadata(typeof(ScrollChrome), new FrameworkPropertyMetadata(true, FrameworkPropertyMetadataOptions.AffectsRender)); 
        }
 
        /// 
        ///     Instantiates a new instance of a ScrollChrome with no parent element.
        /// 
        public ScrollChrome() 
        {
        } 
 
        #endregion Constructors
 
        #region Dynamic Properties

        /// 
        /// DependencyProperty for  property. 
        /// 
        public static readonly DependencyProperty HasOuterBorderProperty = 
                 DependencyProperty.Register("HasOuterBorder", 
                         typeof(bool),
                         typeof(ScrollChrome), 
                         new FrameworkPropertyMetadata(
                                true,
                                FrameworkPropertyMetadataOptions.AffectsRender));
 
        /// 
        /// When true the chrome renders with a white outer border. 
        ///  
        public bool HasOuterBorder
        { 
            get { return (bool)GetValue(HasOuterBorderProperty); }
            set { SetValue(HasOuterBorderProperty, value); }
        }
 

        ///  
        ///     Attached DependencyProperty to assign the orientation and type of the glyph 
        /// 
        public static readonly DependencyProperty ScrollGlyphProperty = 
                DependencyProperty.RegisterAttached(
                        "ScrollGlyph",
                        typeof(ScrollGlyph),
                        typeof(ScrollChrome), 
                        new FrameworkPropertyMetadata(
                                ScrollGlyph.None, 
                                FrameworkPropertyMetadataOptions.AffectsRender), 
                        new ValidateValueCallback(IsValidScrollGlyph));
 
        /// 
        ///     Gets the value of the ScrollGlyph property on the object.
        /// 
        /// The object to which the property is attached. 
        /// The value of the property.
        public static ScrollGlyph GetScrollGlyph(DependencyObject element) 
        { 
            if (element == null) { throw new ArgumentNullException("element"); }
 
            return (ScrollGlyph)element.GetValue(ScrollGlyphProperty);
        }

        ///  
        ///     Attachs the value to the object.
        ///  
        /// The object on which the value will be attached. 
        /// The value to attach.
        public static void SetScrollGlyph(DependencyObject element, ScrollGlyph value) 
        {
            if (element == null) { throw new ArgumentNullException("element"); }

            element.SetValue(ScrollGlyphProperty, value); 
        }
 
        private ScrollGlyph ScrollGlyph 
        {
            get { return (ScrollGlyph) GetValue(ScrollGlyphProperty); } 
        }

        private static bool IsValidScrollGlyph(object o)
        { 
            ScrollGlyph glyph = (ScrollGlyph)o;
            return glyph == ScrollGlyph.None || 
                glyph == ScrollGlyph.LeftArrow || 
                glyph == ScrollGlyph.RightArrow ||
                glyph == ScrollGlyph.UpArrow || 
                glyph == ScrollGlyph.DownArrow ||
                glyph == ScrollGlyph.VerticalGripper ||
                glyph == ScrollGlyph.HorizontalGripper;
        } 

        ///  
        ///     DependencyProperty for  property. 
        /// 
        public static readonly DependencyProperty PaddingProperty = Control.PaddingProperty.AddOwner(typeof(ScrollChrome)); 

        /// 
        ///     Insets the border of the element.
        ///  
        public Thickness Padding
        { 
            get { return (Thickness) GetValue(PaddingProperty); } 
            set { SetValue(PaddingProperty, value); }
        } 

        /// 
        /// DependencyProperty for  property.
        ///  
        public static readonly DependencyProperty RenderMouseOverProperty
            = ButtonChrome.RenderMouseOverProperty.AddOwner(typeof(ScrollChrome), 
                                new FrameworkPropertyMetadata( 
                                false,
                                FrameworkPropertyMetadataOptions.AffectsRender)); 

        /// 
        /// When true the chrome renders with a mouse over look.
        ///  
        public bool RenderMouseOver
        { 
            get { return (bool)GetValue(RenderMouseOverProperty); } 
            set { SetValue(RenderMouseOverProperty, value); }
        } 


        /// 
        /// DependencyProperty for  property. 
        /// 
        public static readonly DependencyProperty RenderPressedProperty 
            = ButtonChrome.RenderPressedProperty.AddOwner(typeof(ScrollChrome), 
                                new FrameworkPropertyMetadata(
                                false, 
                                FrameworkPropertyMetadataOptions.AffectsRender));

        /// 
        /// When true the chrome renders with a pressed look. 
        /// 
        public bool RenderPressed 
        { 
            get { return (bool)GetValue(RenderPressedProperty); }
            set { SetValue(RenderPressedProperty, value); } 
        }

        #endregion Dynamic Properties
 
        #region Protected Methods
 
        ///  
        ///     Updates DesiredSize of the ScrollChrome.  Called by parent UIElement.  This is the first pass of layout.
        ///  
        /// 
        ///     ScrollChrome basically constrains the value of its Width and Height properties.
        /// 
        /// Available size is an "upper limit" that the return value should not exceed. 
        /// The ScrollChrome's desired size.
        protected override Size MeasureOverride(Size availableSize) 
        { 
            _transform = null;
 
            return new Size(0,0);
        }

        ///  
        ///     ScrollChrome does no work here and returns arrangeSize.
        ///  
        /// Size the ContentPresenter will assume. 
        protected override Size ArrangeOverride(Size finalSize)
        { 
            _transform = null;
            return finalSize;
        }
 
        /// 
        /// Render callback. 
        /// Note: Assumes all borders are 1 unit. 
        /// 
        protected override void OnRender(DrawingContext drawingContext) 
        {
            Rect bounds = new Rect(0, 0, ActualWidth, ActualHeight);
            ScrollGlyph glyph = ScrollGlyph;
            bool hasModifiers; 

            // Padding will be used to inset the border - used by ComboBox buttons 
            if (GetValueSource(PaddingProperty, null, out hasModifiers) != BaseValueSourceInternal.Default || hasModifiers) 
            {
                Thickness padding = Padding; 

                double totalPadding = padding.Left + padding.Right;
                if (totalPadding >= bounds.Width)
                { 
                    bounds.Width = 0.0;
                } 
                else 
                {
                    bounds.X += padding.Left; 
                    bounds.Width -= totalPadding;
                }

                totalPadding = padding.Top + padding.Bottom; 
                if (totalPadding >= bounds.Height)
                { 
                    bounds.Height = 0.0; 
                }
                else 
                {
                    bounds.Y += padding.Top;
                    bounds.Height -= totalPadding;
                } 
            }
 
            if ((bounds.Width >= 1.0) && (bounds.Height >= 1.0)) 
            {
                bounds.X += 0.5; 
                bounds.Y += 0.5;
                bounds.Width -= 1.0;
                bounds.Height -= 1.0;
            } 

            switch (glyph) 
            { 
                case ScrollGlyph.LeftArrow:
                case ScrollGlyph.RightArrow: 
                case ScrollGlyph.HorizontalGripper:
                    if (bounds.Height >= 1.0)
                    {
                        bounds.Y += 1.0; 
                        bounds.Height -= 1.0;
                    } 
                    break; 

                case ScrollGlyph.UpArrow: 
                case ScrollGlyph.DownArrow:
                case ScrollGlyph.VerticalGripper:
                    if (bounds.Width >= 1.0)
                    { 
                        bounds.X += 1.0;
                        bounds.Width -= 1.0; 
                    } 
                    break;
            } 

            DrawBorders(drawingContext, ref bounds);
            DrawGlyph(drawingContext, glyph, ref bounds);
        } 

        #endregion 
 
        #region Private Methods
 
        private void DrawBorders(DrawingContext dc, ref Rect bounds)
        {
            if ((bounds.Width >= 2.0) && (bounds.Height >= 2.0))
            { 
                Brush brush = Fill;
                Pen pen = OuterBorder; 
                if (pen != null) 
                {
                    dc.DrawRoundedRectangle( 
                        brush,
                        pen,
                        new Rect(bounds.X, bounds.Y, bounds.Width, bounds.Height),
                        2.0, 2.0); 
                    brush = null; // Done with the fill
                    bounds.Inflate(-1.0, -1.0); 
                } 

                if ((bounds.Width >= 2.0) && (bounds.Height >= 2.0)) 
                {
                    pen = InnerBorder;
                    if ((pen != null) || (brush != null))
                    { 
                        dc.DrawRoundedRectangle(
                            brush, 
                            pen, 
                            new Rect(bounds.X, bounds.Y, bounds.Width, bounds.Height),
                            1.5, 1.5); 
                        bounds.Inflate(-1.0, -1.0);
                    }
                }
            } 
        }
 
        private void DrawGlyph(DrawingContext dc, ScrollGlyph glyph, ref Rect bounds) 
        {
 
            if ((bounds.Width > 0.0) && (bounds.Height > 0.0))
            {
                Brush brush = Glyph;
 
                if ((brush != null) && (glyph != ScrollGlyph.None))
                { 
                    switch (glyph) 
                    {
                        case ScrollGlyph.HorizontalGripper: 
                            DrawHorizontalGripper(dc, brush, bounds);
                            break;

                        case ScrollGlyph.VerticalGripper: 
                            DrawVerticalGripper(dc, brush, bounds);
                            break; 
 
                        case ScrollGlyph.LeftArrow:
                        case ScrollGlyph.RightArrow: 
                        case ScrollGlyph.UpArrow:
                        case ScrollGlyph.DownArrow:
                            DrawArrow(dc, brush, bounds, glyph);
                            break; 
                    }
                } 
            } 
        }
 
        private void DrawHorizontalGripper(DrawingContext dc, Brush brush, Rect bounds)
        {
            if ((bounds.Width > 8.0) && (bounds.Height > 2.0))
            { 
                Brush glyphShadow = GlyphShadow;
 
                double height = Math.Min(6.0, bounds.Height); 
                double x = bounds.X + ((bounds.Width * 0.5) - 4.0);
                double y = bounds.Y + ((bounds.Height - height) * 0.5); 

                height -= 1.0;
                for (int i = 0; i < 8; i+=2)
                { 
                    dc.DrawRectangle(brush, null, new Rect(x + i, y, 1.0, height));
                    if (glyphShadow != null) 
                    { 
                        dc.DrawRectangle(glyphShadow, null, new Rect(x + i + 1, y + 1, 1.0, height));
                    } 
                }
            }
        }
 
        private void DrawVerticalGripper(DrawingContext dc, Brush brush, Rect bounds)
        { 
            if ((bounds.Width > 2.0) && (bounds.Height > 8.0)) 
            {
                Brush glyphShadow = GlyphShadow; 

                double width = Math.Min(6.0, bounds.Width);
                double x = bounds.X + ((bounds.Width - width) * 0.5);
                double y = bounds.Y + ((bounds.Height * 0.5) - 4.0); 

                width -= 1.0; 
                for (int i = 0; i < 8; i += 2) 
                {
                    dc.DrawRectangle(brush, null, new Rect(x, y + i, width, 1.0)); 
                    if (glyphShadow != null)
                    {
                        dc.DrawRectangle(glyphShadow, null, new Rect(x + 1, y + i + 1, width, 1.0));
                    } 
                }
            } 
        } 

        #region Arrow Geometry Generation 

        // Geometries for arrows don't change so use static versions to reduce working set
        private static object _glyphAccess = new object();
        private static Geometry _leftArrowGeometry; 
        private static Geometry _rightArrowGeometry;
        private static Geometry _upArrowGeometry; 
        private static Geometry _downArrowGeometry; 

        private static Geometry LeftArrowGeometry 
        {
            get
            {
                if (_leftArrowGeometry == null) 
                {
                    lock (_glyphAccess) 
                    { 
                        if (_leftArrowGeometry == null)
                        { 
                            PathFigure figure = new PathFigure();
                            figure.StartPoint = new Point(4.5, 0.0);
                            figure.Segments.Add(new LineSegment(new Point(0.0, 4.5), true));
                            figure.Segments.Add(new LineSegment(new Point(4.5, 9.0), true)); 
                            figure.Segments.Add(new LineSegment(new Point(6.0, 7.5), true));
                            figure.Segments.Add(new LineSegment(new Point(3.0, 4.5), true)); 
                            figure.Segments.Add(new LineSegment(new Point(6.0, 1.5), true)); 
                            figure.IsClosed = true;
                            figure.Freeze(); 

                            PathGeometry path = new PathGeometry();
                            path.Figures.Add(figure);
                            path.Freeze(); 

                            _leftArrowGeometry = path; 
                        } 
                    }
                } 

                return _leftArrowGeometry;
            }
        } 

        private static Geometry RightArrowGeometry 
        { 
            get
            { 
                if (_rightArrowGeometry == null)
                {
                    lock (_glyphAccess)
                    { 
                        if (_rightArrowGeometry == null)
                        { 
                            PathFigure figure = new PathFigure(); 
                            figure.StartPoint = new Point(3.5, 0.0);
                            figure.Segments.Add(new LineSegment(new Point(8.0, 4.5), true)); 
                            figure.Segments.Add(new LineSegment(new Point(3.5, 9.0), true));
                            figure.Segments.Add(new LineSegment(new Point(2.0, 7.5), true));
                            figure.Segments.Add(new LineSegment(new Point(5.0, 4.5), true));
                            figure.Segments.Add(new LineSegment(new Point(2.0, 1.5), true)); 
                            figure.IsClosed = true;
                            figure.Freeze(); 
 
                            PathGeometry path = new PathGeometry();
                            path.Figures.Add(figure); 
                            path.Freeze();

                            _rightArrowGeometry = path;
                        } 
                    }
                } 
 
                return _rightArrowGeometry;
            } 
        }

        private static Geometry UpArrowGeometry
        { 
            get
            { 
                if (_upArrowGeometry == null) 
                {
                    lock (_glyphAccess) 
                    {
                        if (_upArrowGeometry == null)
                        {
                            PathFigure figure = new PathFigure(); 
                            figure.StartPoint = new Point(0.0, 4.5);
                            figure.Segments.Add(new LineSegment(new Point(4.5, 0.0), true)); 
                            figure.Segments.Add(new LineSegment(new Point(9.0, 4.5), true)); 
                            figure.Segments.Add(new LineSegment(new Point(7.5, 6.0), true));
                            figure.Segments.Add(new LineSegment(new Point(4.5, 3.0), true)); 
                            figure.Segments.Add(new LineSegment(new Point(1.5, 6.0), true));
                            figure.IsClosed = true;
                            figure.Freeze();
 
                            PathGeometry path = new PathGeometry();
                            path.Figures.Add(figure); 
                            path.Freeze(); 

                            _upArrowGeometry = path; 
                        }
                    }
                }
 
                return _upArrowGeometry;
            } 
        } 

        private static Geometry DownArrowGeometry 
        {
            get
            {
                if (_downArrowGeometry == null) 
                {
                    lock (_glyphAccess) 
                    { 
                        if (_downArrowGeometry == null)
                        { 
                            PathFigure figure = new PathFigure();
                            figure.StartPoint = new Point(0.0, 3.5);
                            figure.Segments.Add(new LineSegment(new Point(4.5, 8.0), true));
                            figure.Segments.Add(new LineSegment(new Point(9.0, 3.5), true)); 
                            figure.Segments.Add(new LineSegment(new Point(7.5, 2.0), true));
                            figure.Segments.Add(new LineSegment(new Point(4.5, 5.0), true)); 
                            figure.Segments.Add(new LineSegment(new Point(1.5, 2.0), true)); 
                            figure.IsClosed = true;
                            figure.Freeze(); 

                            PathGeometry path = new PathGeometry();
                            path.Figures.Add(figure);
                            path.Freeze(); 

                            _downArrowGeometry = path; 
                        } 
                    }
                } 

                return _downArrowGeometry;
            }
        } 

 
        #endregion 

        private void DrawArrow(DrawingContext dc, Brush brush, Rect bounds, ScrollGlyph glyph) 
        {
            if (_transform == null)
            {
                double glyphWidth = 9.0; 
                double glyphHeight = 9.0;
                switch (glyph) 
                { 
                    case ScrollGlyph.LeftArrow:
                    case ScrollGlyph.RightArrow: 
                        glyphWidth = 8.0;
                        break;

                    case ScrollGlyph.UpArrow: 
                    case ScrollGlyph.DownArrow:
                        glyphHeight = 8.0; 
                        break; 
                }
                Matrix matrix = new Matrix(); 

                if ((bounds.Width < glyphWidth) || (bounds.Height < glyphHeight))
                {
                    double widthScale = Math.Min(glyphWidth, bounds.Width) / glyphWidth; 
                    double heightScale = Math.Min(glyphHeight, bounds.Height) / glyphHeight;
 
                    double x = (bounds.X + (bounds.Width * 0.5)) / widthScale - (glyphWidth * 0.5); 
                    double y = (bounds.Y + (bounds.Height * 0.5)) / heightScale - (glyphHeight * 0.5);
 
                    if (double.IsNaN(widthScale) || double.IsInfinity(widthScale) || double.IsNaN(heightScale) || double.IsInfinity(heightScale) ||
                        double.IsNaN(x) || double.IsInfinity(x) || double.IsNaN(y) || double.IsInfinity(y))
                    {
                        return; 
                    }
 
                    matrix.Translate(x, y); 
                    matrix.Scale(widthScale, heightScale);
                } 
                else
                {
                    double x = bounds.X + (bounds.Width * 0.5) - (glyphWidth * 0.5);
                    double y = bounds.Y + (bounds.Height * 0.5) - (glyphHeight * 0.5); 
                    matrix.Translate(x, y);
                } 
 
                _transform = new MatrixTransform();
                _transform.Matrix = matrix; 
            }

            dc.PushTransform(_transform);
 
            switch (glyph)
            { 
                case ScrollGlyph.LeftArrow: 
                    dc.DrawGeometry(brush, null, LeftArrowGeometry);
                    break; 

                case ScrollGlyph.RightArrow:
                    dc.DrawGeometry(brush, null, RightArrowGeometry);
                    break; 

                case ScrollGlyph.UpArrow: 
                    dc.DrawGeometry(brush, null, UpArrowGeometry); 
                    break;
 
                case ScrollGlyph.DownArrow:
                    dc.DrawGeometry(brush, null, DownArrowGeometry);
                    break;
            } 

            dc.Pop(); // Center and scaling transform 
        } 

        // 
        //  This property
        //  1. Finds the correct initial size for the _effectiveValues store on the current DependencyObject
        //  2. This is a performance optimization
        // 
        internal override int EffectiveValuesInitialSize
        { 
            get { return 9; } 
        }
 
        private static LinearGradientBrush CommonVerticalFill
        {
            get
            { 
                if (_commonVerticalFill == null)
                { 
                    lock (_resourceAccess) 
                    {
                        if (_commonVerticalFill == null) 
                        {
                            LinearGradientBrush temp = new LinearGradientBrush();
                            temp.StartPoint = new Point(0, 0);
                            temp.EndPoint = new Point(1, 0); 

                            temp.GradientStops.Add(new GradientStop(Color.FromArgb(0xFF, 0xFF, 0xFF, 0xFF), 0)); 
                            temp.GradientStops.Add(new GradientStop(Color.FromArgb(0xFF, 0xBD, 0xD1, 0xE9), 0.8)); 
                            temp.Freeze();
 
                            _commonVerticalFill = temp;
                        }
                    }
                } 
                return _commonVerticalFill;
            } 
        } 

        private static LinearGradientBrush CommonHorizontalFill 
        {
            get
            {
                if (_commonHorizontalFill == null) 
                {
                    lock (_resourceAccess) 
                    { 
                        if (_commonHorizontalFill == null)
                        { 
                            LinearGradientBrush temp = new LinearGradientBrush();
                            temp.StartPoint = new Point(0.5, 0);
                            temp.EndPoint = new Point(0.5, 1);
 
                            temp.GradientStops.Add(new GradientStop(Color.FromArgb(0xFF, 0xFF, 0xFF, 0xFF), 0));
                            temp.GradientStops.Add(new GradientStop(Color.FromArgb(0xFF, 0xC1, 0xD5, 0xED), 0.7)); 
                            temp.Freeze(); 

                            _commonHorizontalFill = temp; 
                        }
                    }
                }
                return _commonHorizontalFill; 
            }
        } 
 

        private static LinearGradientBrush CommonHoverVerticalFill 
        {
            get
            {
                if (_commonHoverVerticalFill == null) 
                {
                    lock (_resourceAccess) 
                    { 
                        if (_commonHoverVerticalFill == null)
                        { 
                            LinearGradientBrush temp = new LinearGradientBrush();
                            temp.StartPoint = new Point(0, 0);
                            temp.EndPoint = new Point(1, 0);
 
                            temp.GradientStops.Add(new GradientStop(Color.FromArgb(0xFF, 0xFF, 0xFF, 0xFF), 0.2));
                            temp.GradientStops.Add(new GradientStop(Color.FromArgb(0xFF, 0xBD, 0xD1, 0xE9), 1)); 
                            temp.Freeze(); 

                            _commonHoverVerticalFill = temp; 
                        }
                    }
                }
                return _commonHoverVerticalFill; 
            }
        } 
 
        private static LinearGradientBrush CommonHoverHorizontalFill
        { 
            get
            {
                if (_commonHoverHorizontalFill == null)
                { 
                    lock (_resourceAccess)
                    { 
                        if (_commonHoverHorizontalFill == null) 
                        {
                            LinearGradientBrush temp = new LinearGradientBrush(); 
                            temp.StartPoint = new Point(0.5, 0);
                            temp.EndPoint = new Point(0.5, 1);

                            temp.GradientStops.Add(new GradientStop(Color.FromArgb(0xFF, 0xFF, 0xFF, 0xFF), 0.3)); 
                            temp.GradientStops.Add(new GradientStop(Color.FromArgb(0xFF, 0xC1, 0xD5, 0xED), 1));
                            temp.Freeze(); 
 
                            _commonHoverHorizontalFill = temp;
                        } 
                    }
                }
                return _commonHoverHorizontalFill;
            } 
        }
 
        private static LinearGradientBrush CommonPressedVerticalFill 
        {
            get 
            {
                if (_commonPressedVerticalFill == null)
                {
                    lock (_resourceAccess) 
                    {
                        if (_commonPressedVerticalFill == null) 
                        { 
                            LinearGradientBrush temp = new LinearGradientBrush();
                            temp.StartPoint = new Point(1, 0); 
                            temp.EndPoint = new Point(0, 0);

                            temp.GradientStops.Add(new GradientStop(Color.FromArgb(0xFF, 0xFF, 0xFF, 0xFF), 0.2));
                            temp.GradientStops.Add(new GradientStop(Color.FromArgb(0xFF, 0xC1, 0xD5, 0xED), 0.7)); 
                            temp.Freeze();
 
                            _commonPressedVerticalFill = temp; 
                        }
                    } 
                }
                return _commonPressedVerticalFill;
            }
        } 

        private static LinearGradientBrush CommonPressedHorizontalFill 
        { 
            get
            { 
                if (_commonPressedHorizontalFill == null)
                {
                    lock (_resourceAccess)
                    { 
                        if (_commonPressedHorizontalFill == null)
                        { 
                            LinearGradientBrush temp = new LinearGradientBrush(); 
                            temp.StartPoint = new Point(0, 1);
                            temp.EndPoint = new Point(0, 0); 

                            temp.GradientStops.Add(new GradientStop(Color.FromArgb(0xFF, 0xFF, 0xFF, 0xFF), 0.3));
                            temp.GradientStops.Add(new GradientStop(Color.FromArgb(0xFF, 0xC1, 0xD5, 0xED), 0.7));
                            temp.Freeze(); 

                            _commonPressedHorizontalFill = temp; 
                        } 
                    }
                } 
                return _commonPressedHorizontalFill;
            }
        }
 
        private static LinearGradientBrush CommonDisabledFill
        { 
            get 
            {
                if (_commonDisabledFill == null) 
                {
                    lock (_resourceAccess)
                    {
                        if (_commonDisabledFill == null) 
                        {
                            LinearGradientBrush temp = new LinearGradientBrush(); 
                            temp.StartPoint = new Point(0, 0); 
                            temp.EndPoint = new Point(1, 1);
 
                            temp.GradientStops.Add(new GradientStop(Color.FromArgb(0xFF, 0xF2, 0xF7, 0xFF), 0));
                            temp.GradientStops.Add(new GradientStop(Color.FromArgb(0xFF, 0xD5, 0xE7, 0xFF), 1));
                            temp.Freeze();
 
                            _commonDisabledFill = temp;
                        } 
                    } 
                }
                return _commonDisabledFill; 
            }
        }

 
        private Brush Fill
        { 
            get 
            {
                if (!IsEnabled) 
                    return CommonDisabledFill;

                if (RenderPressed)
                { 
                    if (ScrollGlyph == ScrollGlyph.VerticalGripper)
                        return CommonPressedVerticalFill; 
                    else 
                        return CommonPressedHorizontalFill;
                } 

                if (RenderMouseOver)
                {
                    if (ScrollGlyph == ScrollGlyph.VerticalGripper) 
                        return CommonHoverVerticalFill;
                    else 
                        return CommonHoverHorizontalFill; 
                }
 
                if (ScrollGlyph == ScrollGlyph.VerticalGripper)
                    return CommonVerticalFill;
                else
                    return CommonHorizontalFill; 
            }
        } 
 

        private static SolidColorBrush CommonDisabledGlyph 
        {
            get
            {
                if (_commonDisabledGlyph == null) 
                {
                    lock (_resourceAccess) 
                    { 
                        if (_commonDisabledGlyph == null)
                        { 
                            SolidColorBrush temp = new SolidColorBrush(Color.FromArgb(0xFF, 0xB7, 0xCB, 0xE3));
                            temp.Freeze();

                            _commonDisabledGlyph = temp; 
                        }
                    } 
                } 
                return _commonDisabledGlyph;
            } 
        }


        private static SolidColorBrush CommonArrowGlyph 
        {
            get 
            { 
                if (_commonArrowGlyph == null)
                { 
                    lock (_resourceAccess)
                    {
                        if (_commonArrowGlyph == null)
                        { 
                            SolidColorBrush temp = new SolidColorBrush(Color.FromArgb(0xFF, 0x5B, 0x64, 0x73));
                            temp.Freeze(); 
 
                            _commonArrowGlyph = temp;
                        } 
                    }
                }
                return _commonArrowGlyph;
            } 
        }
 
        private static SolidColorBrush CommonHoverArrowGlyph 
        {
            get 
            {
                if (_commonHoverArrowGlyph == null)
                {
                    lock (_resourceAccess) 
                    {
                        if (_commonHoverArrowGlyph == null) 
                        { 
                            SolidColorBrush temp = new SolidColorBrush(Color.FromArgb(0xFF, 0x6B, 0x7B, 0x84));
                            temp.Freeze(); 

                            _commonHoverArrowGlyph = temp;
                        }
                    } 
                }
                return _commonHoverArrowGlyph; 
            } 
        }
 
        private static SolidColorBrush CommonGripperGlyph
        {
            get
            { 
                if (_commonGripperGlyph == null)
                { 
                    lock (_resourceAccess) 
                    {
                        if (_commonGripperGlyph == null) 
                        {
                            SolidColorBrush temp = new SolidColorBrush(Color.FromArgb(0xFF, 0xFF, 0xFF, 0xFF));
                            temp.Freeze();
 
                            _commonGripperGlyph = temp;
                        } 
                    } 
                }
                return _commonGripperGlyph; 
            }
        }

        private Brush Glyph 
        {
            get 
            { 
                if (!IsEnabled)
                    return CommonDisabledGlyph; 

                ScrollGlyph scrollGlyph = ScrollGlyph;

                if (scrollGlyph == ScrollGlyph.HorizontalGripper || scrollGlyph == ScrollGlyph.VerticalGripper) 
                {
                    return CommonGripperGlyph; 
                } 
                else
                { 
                    if (RenderMouseOver || RenderPressed)
                        return CommonHoverArrowGlyph;
                    else
                        return CommonArrowGlyph; 
                }
            } 
        } 

 


        private static SolidColorBrush CommonDisabledGripperGlyphShadow
        { 
            get
            { 
                if (_commonDisabledGripperGlyphShadow == null) 
                {
                    lock (_resourceAccess) 
                    {
                        if (_commonDisabledGripperGlyphShadow == null)
                        {
                            SolidColorBrush temp = new SolidColorBrush(Color.FromArgb(0xFF, 0xB9, 0xB9, 0xB2)); 
                            temp.Freeze();
 
                            _commonDisabledGripperGlyphShadow = temp; 
                        }
                    } 
                }
                return _commonDisabledGripperGlyphShadow;
            }
        } 

        private static SolidColorBrush CommonGripperGlyphShadow 
        { 
            get
            { 
                if (_commonGripperGlyphShadow == null)
                {
                    lock (_resourceAccess)
                    { 
                        if (_commonGripperGlyphShadow == null)
                        { 
                            SolidColorBrush temp = new SolidColorBrush(Color.FromArgb(0xFF, 0x83, 0x97, 0xAF)); 
                            temp.Freeze();
 
                            _commonGripperGlyphShadow = temp;
                        }
                    }
                } 
                return _commonGripperGlyphShadow;
            } 
        } 

        private Brush GlyphShadow 
        {
            get
            {
                ScrollGlyph scrollGlyph = ScrollGlyph; 

                if (scrollGlyph == ScrollGlyph.HorizontalGripper || scrollGlyph == ScrollGlyph.VerticalGripper) 
                { 
                    if (!IsEnabled)
                        return CommonDisabledGripperGlyphShadow; 

                    return CommonGripperGlyphShadow;
                }
                return null; 
            }
        } 
 
        private static Pen CommonDisabledOuterBorderPen
        { 
            get
            {
                if (_commonDisabledOuterBorderPen == null)
                { 
                    lock (_resourceAccess)
                    { 
                        if (_commonDisabledOuterBorderPen == null) 
                        {
                            Pen temp = new Pen(); 

                            LinearGradientBrush brush = new LinearGradientBrush();
                            brush.StartPoint = new Point(0, 0);
                            brush.EndPoint = new Point(1, 1); 

                            brush.GradientStops.Add(new GradientStop(Color.FromArgb(0xFF, 0xE1, 0xEE, 0xFF), 0.5)); 
                            brush.GradientStops.Add(new GradientStop(Color.FromArgb(0xFF, 0xB1, 0xC5, 0xDD), 1)); 

                            temp.Brush = brush; 
                            temp.Freeze();

                            _commonDisabledOuterBorderPen = temp;
                        } 
                    }
                } 
                return _commonDisabledOuterBorderPen; 
            }
        } 

        private static Pen CommonOuterBorderPen
        {
            get 
            {
                if (_commonOuterBorderPen == null) 
                { 
                    lock (_resourceAccess)
                    { 
                        if (_commonOuterBorderPen == null)
                        {
                            Pen temp = new Pen();
                            temp.Brush = new SolidColorBrush(Color.FromArgb(0xFF, 0x85, 0x99, 0xB1)); 
                            temp.Freeze();
 
                            _commonOuterBorderPen = temp; 
                        }
                    } 
                }
                return _commonOuterBorderPen;
            }
        } 

        private static Pen CommonHoverOuterBorderPen 
        { 
            get
            { 
                if (_commonHoverOuterBorderPen == null)
                {
                    lock (_resourceAccess)
                    { 
                        if (_commonHoverOuterBorderPen == null)
                        { 
                            Pen temp = new Pen(); 
                            temp.Brush = new SolidColorBrush(Color.FromArgb(0xFF, 0x52, 0x66, 0x7E));
                            temp.Freeze(); 

                            _commonHoverOuterBorderPen = temp;
                        }
                    } 
                }
                return _commonHoverOuterBorderPen; 
            } 
        }
 

        private Pen OuterBorder
        {
            get 
            {
                if (!IsEnabled) 
                    return CommonDisabledOuterBorderPen; 
                else if (RenderMouseOver || RenderPressed)
                    return CommonHoverOuterBorderPen; 
                else
                    return CommonOuterBorderPen;
            }
        } 

 
 
        private static Pen CommonInnerBorderPen
        { 
            get
            {
                if (_commonInnerBorderPen == null)
                { 
                    lock (_resourceAccess)
                    { 
                        if (_commonInnerBorderPen == null) 
                        {
                            Pen temp = new Pen(); 
                            temp.Brush = new SolidColorBrush(Color.FromArgb(0xFF, 0xFF, 0xFF, 0xFF));
                            temp.Freeze();

                            _commonInnerBorderPen = temp; 
                        }
                    } 
                } 
                return _commonInnerBorderPen;
            } 
        }

        private Pen InnerBorder
        { 
            get
            { 
                return CommonInnerBorderPen; 
            }
        } 

        #endregion

        #region Data 

        private static LinearGradientBrush _commonVerticalFill; 
        private static LinearGradientBrush _commonHorizontalFill; 

        private static LinearGradientBrush _commonHoverVerticalFill; 
        private static LinearGradientBrush _commonHoverHorizontalFill;

        private static LinearGradientBrush _commonPressedVerticalFill;
        private static LinearGradientBrush _commonPressedHorizontalFill; 

        private static LinearGradientBrush _commonDisabledFill; 
 

        private static SolidColorBrush _commonDisabledGlyph; 

        private static SolidColorBrush _commonArrowGlyph;

        private static SolidColorBrush _commonHoverArrowGlyph; 

        private static SolidColorBrush _commonGripperGlyph; 
 

        private static SolidColorBrush _commonDisabledGripperGlyphShadow; 

        private static SolidColorBrush _commonGripperGlyphShadow;

 
        private static Pen _commonDisabledOuterBorderPen;
        private static Pen _commonOuterBorderPen; 
 
        private static Pen _commonHoverOuterBorderPen;
 
        private static Pen _commonInnerBorderPen;

        private static object _resourceAccess = new object();
 

        private MatrixTransform _transform; 
 
        #endregion
    } 
}


// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// Copyright (c) Microsoft Corporation. All rights reserved.
                        

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