DataGridHeaderBorder.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 / DataGridHeaderBorder.cs / 1305600 / DataGridHeaderBorder.cs

                            //---------------------------------------------------------------------------- 
//
// Copyright (C) Microsoft Corporation.  All rights reserved.
//
//--------------------------------------------------------------------------- 

using System; 
using System.Collections.Generic; 
using System.ComponentModel;
using System.Diagnostics; 
using System.Windows;
using System.Windows.Controls;
using System.Windows.Media;
 
namespace Microsoft.Windows.Themes
{ 
    ///  
    ///     A Border used to provide the default look of headers.
    ///     When Background or BorderBrush are set, the rendering will 
    ///     revert back to the default Border implementation.
    /// 
    public partial class DataGridHeaderBorder
    { 
        #region Theme Rendering
 
        private Thickness? ThemeDefaultPadding 
        {
            get 
            {
                return null;
            }
        } 

        private void RenderTheme(DrawingContext dc) 
        { 
            Size size = RenderSize;
            bool horizontal = Orientation == Orientation.Horizontal; 
            bool isClickable = IsClickable && IsEnabled;
            bool isHovered = isClickable && IsHovered;
            bool isPressed = isClickable && IsPressed;
            ListSortDirection? sortDirection = SortDirection; 
            bool isSorted = sortDirection != null;
            bool isSelected = IsSelected; 
 
            EnsureCache((int)RoyaleFreezables.NumFreezables);
 
            if (horizontal)
            {
                // When horizontal, rotate the rendering by -90 degrees
                Matrix m1 = new Matrix(); 
                m1.RotateAt(-90.0, 0.0, 0.0);
                Matrix m2 = new Matrix(); 
                m2.Translate(0.0, size.Height); 

                MatrixTransform horizontalRotate = new MatrixTransform(m1 * m2); 
                horizontalRotate.Freeze();
                dc.PushTransform(horizontalRotate);

                double temp = size.Width; 
                size.Width = size.Height;
                size.Height = temp; 
            } 

            // Draw the background 
            RoyaleFreezables backgroundType = isPressed ? RoyaleFreezables.PressedBackground : isHovered ? RoyaleFreezables.HoveredBackground : RoyaleFreezables.NormalBackground;
            LinearGradientBrush background = (LinearGradientBrush)GetCachedFreezable((int)backgroundType);
            if (background == null)
            { 
                background = new LinearGradientBrush();
                background.StartPoint = new Point(); 
                background.EndPoint = new Point(0.0, 1.0); 

                if (isPressed) 
                {
                    background.GradientStops.Add(new GradientStop(Color.FromArgb(0xFF, 0xB9, 0xB9, 0xC8), 0.0));
                    background.GradientStops.Add(new GradientStop(Color.FromArgb(0xFF, 0xEC, 0xEC, 0xF3), 0.1));
                    background.GradientStops.Add(new GradientStop(Color.FromArgb(0xFF, 0xEC, 0xEC, 0xF3), 1.0)); 
                }
                else if (isHovered || isSelected) 
                { 
                    background.GradientStops.Add(new GradientStop(Color.FromArgb(0xFF, 0xFE, 0xFE, 0xFE), 0.0));
                    background.GradientStops.Add(new GradientStop(Color.FromArgb(0xFF, 0xFE, 0xFE, 0xFE), 0.85)); 
                    background.GradientStops.Add(new GradientStop(Color.FromArgb(0xFF, 0xBD, 0xBE, 0xCE), 1.0));
                }
                else
                { 
                    background.GradientStops.Add(new GradientStop(Color.FromArgb(0xFF, 0xF9, 0xFA, 0xFD), 0.0));
                    background.GradientStops.Add(new GradientStop(Color.FromArgb(0xFF, 0xF9, 0xFA, 0xFD), 0.85)); 
                    background.GradientStops.Add(new GradientStop(Color.FromArgb(0xFF, 0xBD, 0xBE, 0xCE), 1.0)); 
                }
 
                background.Freeze();
                CacheFreezable(background, (int)backgroundType);
            }
 
            dc.DrawRectangle(background, null, new Rect(0.0, 0.0, size.Width, size.Height));
 
            if (isHovered && !isPressed && (size.Width >= 6.0) && (size.Height >= 4.0)) 
            {
                // When hovered, there is a colored tab at the bottom 
                TranslateTransform positionTransform = new TranslateTransform(0.0, size.Height - 3.0);
                positionTransform.Freeze();
                dc.PushTransform(positionTransform);
 
                PathGeometry tabGeometry = new PathGeometry();
                PathFigure tabFigure = new PathFigure(); 
 
                tabFigure.StartPoint = new Point(0.5, 0.5);
 
                LineSegment line = new LineSegment(new Point(size.Width - 0.5, 0.5), true);
                line.Freeze();
                tabFigure.Segments.Add(line);
 
                ArcSegment arc = new ArcSegment(new Point(size.Width - 2.5, 2.5), new Size(2.0, 2.0), 90.0, false, SweepDirection.Clockwise, true);
                arc.Freeze(); 
                tabFigure.Segments.Add(arc); 

                line = new LineSegment(new Point(2.5, 2.5), true); 
                line.Freeze();
                tabFigure.Segments.Add(line);

                arc = new ArcSegment(new Point(0.5, 0.5), new Size(2.0, 2.0), 90.0, false, SweepDirection.Clockwise, true); 
                arc.Freeze();
                tabFigure.Segments.Add(arc); 
 
                tabFigure.IsClosed = true;
                tabFigure.Freeze(); 

                tabGeometry.Figures.Add(tabFigure);
                tabGeometry.Freeze();
 
                Pen tabStroke = (Pen)GetCachedFreezable((int)RoyaleFreezables.TabStroke);
                if (tabStroke == null) 
                { 
                    SolidColorBrush tabStrokeBrush = new SolidColorBrush(Color.FromArgb(0xFF, 0xF8, 0xA9, 0x00));
                    tabStrokeBrush.Freeze(); 

                    tabStroke = new Pen(tabStrokeBrush, 1.0);
                    tabStroke.Freeze();
 
                    CacheFreezable(tabStroke, (int)RoyaleFreezables.TabStroke);
                } 
 
                LinearGradientBrush tabFill = (LinearGradientBrush)GetCachedFreezable((int)RoyaleFreezables.TabFill);
                if (tabFill == null) 
                {
                    tabFill = new LinearGradientBrush();
                    tabFill.StartPoint = new Point();
                    tabFill.EndPoint = new Point(1.0, 0.0); 

                    tabFill.GradientStops.Add(new GradientStop(Color.FromArgb(0xFF, 0xFC, 0xE0, 0xA6), 0.0)); 
                    tabFill.GradientStops.Add(new GradientStop(Color.FromArgb(0xFF, 0xF6, 0xC4, 0x56), 0.1)); 
                    tabFill.GradientStops.Add(new GradientStop(Color.FromArgb(0xFF, 0xF6, 0xC4, 0x56), 0.9));
                    tabFill.GradientStops.Add(new GradientStop(Color.FromArgb(0xFF, 0xDF, 0x97, 0x00), 1.0)); 

                    tabFill.Freeze();
                    CacheFreezable(tabFill, (int)RoyaleFreezables.TabFill);
                } 

                dc.DrawGeometry(tabFill, tabStroke, tabGeometry); 
 
                dc.Pop(); // Translate Transform
            } 

            if (isPressed && (size.Width >= 2.0) && (size.Height >= 2.0))
            {
                // When pressed, there is a border on the left and bottom 
                SolidColorBrush border = (SolidColorBrush)GetCachedFreezable((int)RoyaleFreezables.PressedBorder);
                if (border == null) 
                { 
                    border = new SolidColorBrush(Color.FromArgb(0xFF, 0x80, 0x80, 0x99));
                    border.Freeze(); 
                    CacheFreezable(border, (int)RoyaleFreezables.PressedBorder);
                }

                dc.DrawRectangle(border, null, new Rect(0.0, 0.0, 1.0, size.Height)); 
                dc.DrawRectangle(border, null, new Rect(0.0, Max0(size.Height - 1.0), size.Width, 1.0));
            } 
 
            if (!isPressed && !isHovered && (size.Width >= 4.0))
            { 
                if (SeparatorVisibility == Visibility.Visible)
                {
                    Brush sideBrush;
                    if (SeparatorBrush != null) 
                    {
                        sideBrush = SeparatorBrush; 
                    } 
                    else
                    { 
                        // When not pressed or hovered, draw the resize gripper
                        LinearGradientBrush gripper = (LinearGradientBrush)GetCachedFreezable((int)(horizontal ? RoyaleFreezables.HorizontalGripper : RoyaleFreezables.VerticalGripper));
                        if (gripper == null)
                        { 
                            gripper = new LinearGradientBrush();
                            gripper.StartPoint = new Point(); 
                            gripper.EndPoint = new Point(1.0, 0.0); 

                            Color highlight = Color.FromArgb(0xFF, 0xFF, 0xFF, 0xFF); 
                            Color shadow = Color.FromArgb(0xFF, 0xC7, 0xC5, 0xB2);

                            if (horizontal)
                            { 
                                gripper.GradientStops.Add(new GradientStop(highlight, 0.0));
                                gripper.GradientStops.Add(new GradientStop(highlight, 0.25)); 
                                gripper.GradientStops.Add(new GradientStop(shadow, 0.75)); 
                                gripper.GradientStops.Add(new GradientStop(shadow, 1.0));
                            } 
                            else
                            {
                                gripper.GradientStops.Add(new GradientStop(shadow, 0.0));
                                gripper.GradientStops.Add(new GradientStop(shadow, 0.25)); 
                                gripper.GradientStops.Add(new GradientStop(highlight, 0.75));
                                gripper.GradientStops.Add(new GradientStop(highlight, 1.0)); 
                            } 

                            gripper.Freeze(); 
                            CacheFreezable(gripper, (int)(horizontal ? RoyaleFreezables.HorizontalGripper : RoyaleFreezables.VerticalGripper));
                        }

                        sideBrush = gripper; 
                    }
 
                    dc.DrawRectangle(sideBrush, null, new Rect(horizontal ? 0.0 : Max0(size.Width - 2.0), 4.0, 2.0, Max0(size.Height - 8.0))); 
                }
            } 

            if (isSorted && (size.Width > 14.0) && (size.Height > 10.0))
            {
                // When sorted, draw an arrow on the right 
                TranslateTransform positionTransform = new TranslateTransform(size.Width - 15.0, (size.Height - 5.0) * 0.5);
                positionTransform.Freeze(); 
                dc.PushTransform(positionTransform); 

                bool ascending = (sortDirection == ListSortDirection.Ascending); 
                PathGeometry arrowGeometry = (PathGeometry)GetCachedFreezable(ascending ? (int)RoyaleFreezables.ArrowUpGeometry : (int)RoyaleFreezables.ArrowDownGeometry);
                if (arrowGeometry == null)
                {
                    arrowGeometry = new PathGeometry(); 
                    PathFigure arrowFigure = new PathFigure();
 
                    if (ascending) 
                    {
                        arrowFigure.StartPoint = new Point(0.0, 5.0); 

                        LineSegment line = new LineSegment(new Point(5.0, 0.0), false);
                        line.Freeze();
                        arrowFigure.Segments.Add(line); 

                        line = new LineSegment(new Point(10.0, 5.0), false); 
                        line.Freeze(); 
                        arrowFigure.Segments.Add(line);
                    } 
                    else
                    {
                        arrowFigure.StartPoint = new Point(0.0, 0.0);
 
                        LineSegment line = new LineSegment(new Point(10.0, 0.0), false);
                        line.Freeze(); 
                        arrowFigure.Segments.Add(line); 

                        line = new LineSegment(new Point(5.0, 5.0), false); 
                        line.Freeze();
                        arrowFigure.Segments.Add(line);
                    }
 
                    arrowFigure.IsClosed = true;
                    arrowFigure.Freeze(); 
 
                    arrowGeometry.Figures.Add(arrowFigure);
                    arrowGeometry.Freeze(); 

                    CacheFreezable(arrowGeometry, ascending ? (int)RoyaleFreezables.ArrowUpGeometry : (int)RoyaleFreezables.ArrowDownGeometry);
                }
 
                SolidColorBrush arrowFill = (SolidColorBrush)GetCachedFreezable((int)RoyaleFreezables.ArrowFill);
                if (arrowFill == null) 
                { 
                    arrowFill = new SolidColorBrush(Color.FromArgb(0xFF, 0xAC, 0xA8, 0x99));
                    arrowFill.Freeze(); 
                    CacheFreezable(arrowFill, (int)RoyaleFreezables.ArrowFill);
                }

                dc.DrawGeometry(arrowFill, null, arrowGeometry); 

                dc.Pop(); // Position Transform 
            } 

            if (horizontal) 
            {
                dc.Pop(); // Horizontal Rotate
            }
        } 

        private enum RoyaleFreezables 
        { 
            NormalBackground,
            HoveredBackground, 
            PressedBackground,
            HorizontalGripper,
            VerticalGripper,
            PressedBorder, 
            TabGeometry,
            TabStroke, 
            TabFill, 
            ArrowFill,
            ArrowUpGeometry, 
            ArrowDownGeometry,
            NumFreezables
        }
 
        #endregion
    } 
} 

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

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