//
// ToolStripRenderer.cs
//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
// 
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
// 
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//
// Copyright (c) Jonathan Pobst
//
// Authors:
//	Jonathan Pobst (monkey@jpobst.com)
//

using System;
using System.ComponentModel;
using System.Drawing;
using System.Drawing.Imaging;
using System.Drawing.Drawing2D;

namespace System.Windows.Forms
{
	public abstract class ToolStripRenderer
	{
		private static ColorMatrix grayscale_matrix = new ColorMatrix (new float[][] {
					  new float[] {0.22f, 0.22f, 0.22f, 0, 0},
					  new float[] {0.27f, 0.27f, 0.27f, 0, 0},
					  new float[] {0.04f, 0.04f, 0.04f, 0, 0},
					  new float[] {0.365f, 0.365f, 0.365f, 0.7f, 0},
					  new float[] {0, 0, 0, 0, 1}
				  });

		protected ToolStripRenderer () 
		{
		}

		#region Public Methods
		public static Image CreateDisabledImage(Image normalImage)
		{
			if (normalImage == null)
				return null;
				
			// Code adapted from ThemeWin32Classic.cs
			ImageAttributes ia = new ImageAttributes();
			ia.SetColorMatrix (grayscale_matrix);
			
			Bitmap b = new Bitmap(normalImage.Width, normalImage.Height);
			using (Graphics g = Graphics.FromImage(b))
				g.DrawImage(normalImage, new Rectangle (0, 0, normalImage.Width, normalImage.Height), 0, 0, normalImage.Width, normalImage.Height, GraphicsUnit.Pixel, ia);
			
			return b;
		}
		
		public void DrawArrow (ToolStripArrowRenderEventArgs e)
		{ this.OnRenderArrow (e); }
		
		public void DrawButtonBackground (ToolStripItemRenderEventArgs e)
		{ this.OnRenderButtonBackground (e); }

		public void DrawDropDownButtonBackground (ToolStripItemRenderEventArgs e)
		{ this.OnRenderDropDownButtonBackground (e); }

		public void DrawGrip (ToolStripGripRenderEventArgs e)
		{ this.OnRenderGrip (e); }

		public void DrawImageMargin (ToolStripRenderEventArgs e)
		{ this.OnRenderImageMargin (e); }

		public void DrawItemBackground (ToolStripItemRenderEventArgs e)
		{ this.OnRenderItemBackground (e); }

		public void DrawItemCheck (ToolStripItemImageRenderEventArgs e)
		{ this.OnRenderItemCheck (e); }

		public void DrawItemImage (ToolStripItemImageRenderEventArgs e)
		{ this.OnRenderItemImage (e); }

		public void DrawItemText (ToolStripItemTextRenderEventArgs e)
		{ this.OnRenderItemText (e); }

		public void DrawLabelBackground (ToolStripItemRenderEventArgs e)
		{ this.OnRenderLabelBackground (e); }

		public void DrawMenuItemBackground (ToolStripItemRenderEventArgs e)
		{ this.OnRenderMenuItemBackground (e); }

		public void DrawOverflowButtonBackground (ToolStripItemRenderEventArgs e)
		{ this.OnRenderOverflowButtonBackground (e); }

		public void DrawSeparator (ToolStripSeparatorRenderEventArgs e)
		{ this.OnRenderSeparator (e); }

		public void DrawSplitButton (ToolStripItemRenderEventArgs e)
		{ this.OnRenderSplitButtonBackground (e); }

		public void DrawStatusStripSizingGrip (ToolStripRenderEventArgs e)
		{ this.OnRenderStatusStripSizingGrip (e); }

		public void DrawToolStripBackground (ToolStripRenderEventArgs e)
		{ this.OnRenderToolStripBackground (e); }

		public void DrawToolStripBorder (ToolStripRenderEventArgs e)
		{ this.OnRenderToolStripBorder (e); }

		public void DrawToolStripContentPanelBackground (ToolStripContentPanelRenderEventArgs e)
		{ this.OnRenderToolStripContentPanelBackground (e); }

		public void DrawToolStripPanelBackground (ToolStripPanelRenderEventArgs e)
		{ this.OnRenderToolStripPanelBackground (e); }

		public void DrawToolStripStatusLabelBackground (ToolStripItemRenderEventArgs e)
		{ this.OnRenderToolStripStatusLabelBackground (e); }
		#endregion

		#region Protected Methods
		protected internal virtual void Initialize (ToolStrip toolStrip) {}
		protected internal virtual void InitializeContentPanel (ToolStripContentPanel contentPanel) {}
		protected internal virtual void InitializeItem (ToolStripItem item) {}
		protected internal virtual void InitializePanel (ToolStripPanel toolStripPanel) {}

		protected virtual void OnRenderArrow (ToolStripArrowRenderEventArgs e)
		{
			switch (e.Direction) {
				case ArrowDirection.Down:
					using (Pen p = new Pen (e.ArrowColor)) {
						int x = e.ArrowRectangle.Left + (e.ArrowRectangle.Width / 2) - 3;
						int y = e.ArrowRectangle.Top + (e.ArrowRectangle.Height / 2) - 2;

						DrawDownArrow (e.Graphics, p, x, y);
					}
					break;
				case ArrowDirection.Left:
					break;
				case ArrowDirection.Right:
					using (Pen p = new Pen (e.ArrowColor)) {
						int x = e.ArrowRectangle.Left + (e.ArrowRectangle.Width / 2) - 3;
						int y = e.ArrowRectangle.Top + (e.ArrowRectangle.Height / 2) - 4;

						DrawRightArrow (e.Graphics, p, x, y);
					}
					break;
				case ArrowDirection.Up:
					break;
			}
			
			ToolStripArrowRenderEventHandler eh = (ToolStripArrowRenderEventHandler)Events[RenderArrowEvent];
			if (eh != null)
				eh (this, e);
		}

		protected virtual void OnRenderButtonBackground (ToolStripItemRenderEventArgs e)
		{
			ToolStripItemRenderEventHandler eh = (ToolStripItemRenderEventHandler)Events [RenderButtonBackgroundEvent];
			if (eh != null)
				eh (this, e);
		}

		protected virtual void OnRenderDropDownButtonBackground (ToolStripItemRenderEventArgs e)
		{
			ToolStripItemRenderEventHandler eh = (ToolStripItemRenderEventHandler)Events [RenderDropDownButtonBackgroundEvent];
			if (eh != null)
				eh (this, e);
		}
		
		protected virtual void OnRenderGrip (ToolStripGripRenderEventArgs e)
		{
			ToolStripGripRenderEventHandler eh = (ToolStripGripRenderEventHandler)Events [RenderGripEvent];
			if (eh != null)
				eh (this, e);
		}

		protected virtual void OnRenderImageMargin (ToolStripRenderEventArgs e)
		{
			ToolStripRenderEventHandler eh = (ToolStripRenderEventHandler)Events [RenderImageMarginEvent];
			if (eh != null)
				eh (this, e);
		}

		protected virtual void OnRenderItemBackground (ToolStripItemRenderEventArgs e)
		{
			if (e.Item.BackColor != Control.DefaultBackColor) {
				// Only paint the BackColor if it's not the default one,
				// to avoid painting a solid background color over the parent ToolStrip gradient.
				Rectangle item_bounds = new Rectangle (0, 0, e.Item.Width, e.Item.Height);
				e.Graphics.FillRectangle (ThemeEngine.Current.ResPool.GetSolidBrush (e.Item.BackColor), item_bounds);
			}

			if (e.Item.BackgroundImage != null) {
				Rectangle item_bounds = new Rectangle (0, 0, e.Item.Width, e.Item.Height);
				DrawBackground (e.Graphics, item_bounds, e.Item.BackgroundImage, e.Item.BackgroundImageLayout);
			}

			ToolStripItemRenderEventHandler eh = (ToolStripItemRenderEventHandler)Events [RenderItemBackgroundEvent];
			if (eh != null)
				eh (this, e);
		}

		protected virtual void OnRenderItemCheck (ToolStripItemImageRenderEventArgs e)
		{
			ToolStripItemImageRenderEventHandler eh = (ToolStripItemImageRenderEventHandler)Events [RenderItemCheckEvent];
			if (eh != null)
				eh (this, e);
		}

		protected virtual void OnRenderItemImage (ToolStripItemImageRenderEventArgs e)
		{
			bool need_dispose = false;
			Image i = e.Image;
			
			if (e.Item.RightToLeft == RightToLeft.Yes && e.Item.RightToLeftAutoMirrorImage == true) {
				i = CreateMirrorImage (i);
				need_dispose = true;
			}
				
			if (e.Item.ImageTransparentColor != Color.Empty) {
				ImageAttributes ia = new ImageAttributes ();
				ia.SetColorKey (e.Item.ImageTransparentColor, e.Item.ImageTransparentColor);
				e.Graphics.DrawImage (i, e.ImageRectangle, 0, 0, i.Width, i.Height, GraphicsUnit.Pixel, ia);
				ia.Dispose ();
			}
			else
				e.Graphics.DrawImage (i, e.ImageRectangle);
			
			if (need_dispose)
				i.Dispose ();
		
			ToolStripItemImageRenderEventHandler eh = (ToolStripItemImageRenderEventHandler)Events [RenderItemImageEvent];
			if (eh != null)
				eh (this, e);
		}

		protected virtual void OnRenderItemText (ToolStripItemTextRenderEventArgs e)
		{
			if (e.TextDirection == ToolStripTextDirection.Vertical90) {
				GraphicsState gs = e.Graphics.Save ();
				PointF p = new PointF (e.Graphics.Transform.OffsetX, e.Graphics.Transform.OffsetY);
				
				e.Graphics.ResetTransform ();
				e.Graphics.RotateTransform (90);
				
				RectangleF r = new RectangleF ((e.Item.Height - e.TextRectangle.Height) / 2, (e.TextRectangle.Width + p.X) * -1 - 18, e.TextRectangle.Height, e.TextRectangle.Width);
				
				StringFormat sf = new StringFormat ();
				sf.Alignment = StringAlignment.Center;
				
				e.Graphics.DrawString (e.Text, e.TextFont, ThemeEngine.Current.ResPool.GetSolidBrush (e.TextColor), r, sf);
				
				e.Graphics.Restore (gs);
			} else if (e.TextDirection == ToolStripTextDirection.Vertical270) {
				GraphicsState gs = e.Graphics.Save ();
				PointF p = new PointF (e.Graphics.Transform.OffsetX, e.Graphics.Transform.OffsetY);

				e.Graphics.ResetTransform ();
				e.Graphics.RotateTransform (270);

				RectangleF r = new RectangleF (-e.TextRectangle.Height - (e.Item.Height - e.TextRectangle.Height) / 2, (e.TextRectangle.Width + p.X) + 4, e.TextRectangle.Height, e.TextRectangle.Width);

				StringFormat sf = new StringFormat ();
				sf.Alignment = StringAlignment.Center;

				e.Graphics.DrawString (e.Text, e.TextFont, ThemeEngine.Current.ResPool.GetSolidBrush (e.TextColor), r, sf);

				e.Graphics.Restore (gs);
			} else
				TextRenderer.DrawText (e.Graphics, e.Text, e.TextFont, e.TextRectangle, e.TextColor, e.TextFormat);

			ToolStripItemTextRenderEventHandler eh = (ToolStripItemTextRenderEventHandler)Events[RenderItemTextEvent];
			if (eh != null)
				eh (this, e);
		}

		protected virtual void OnRenderLabelBackground (ToolStripItemRenderEventArgs e)
		{
			ToolStripItemRenderEventHandler eh = (ToolStripItemRenderEventHandler)Events [RenderLabelBackgroundEvent];
			if (eh != null)
				eh (this, e);
		}

		protected virtual void OnRenderMenuItemBackground (ToolStripItemRenderEventArgs e)
		{
			ToolStripItemRenderEventHandler eh = (ToolStripItemRenderEventHandler)Events [RenderMenuItemBackgroundEvent];
			if (eh != null)
				eh (this, e);
		}

		protected virtual void OnRenderOverflowButtonBackground (ToolStripItemRenderEventArgs e)
		{
			ToolStripItemRenderEventHandler eh = (ToolStripItemRenderEventHandler)Events [RenderOverflowButtonBackgroundEvent];
			if (eh != null)
				eh (this, e);
		}

		protected virtual void OnRenderSeparator (ToolStripSeparatorRenderEventArgs e)
		{
			ToolStripSeparatorRenderEventHandler eh = (ToolStripSeparatorRenderEventHandler)Events [RenderSeparatorEvent];
			if (eh != null)
				eh (this, e);
		}

		protected virtual void OnRenderSplitButtonBackground (ToolStripItemRenderEventArgs e)
		{
			ToolStripItemRenderEventHandler eh = (ToolStripItemRenderEventHandler)Events [RenderSplitButtonBackgroundEvent];
			if (eh != null)
				eh (this, e);
		}

		protected virtual void OnRenderStatusStripSizingGrip (ToolStripRenderEventArgs e)
		{
			StatusStrip ss = (StatusStrip)e.ToolStrip;
			
			if (ss.SizingGrip == true)
				DrawSizingGrip (e.Graphics, ss.SizeGripBounds);
			
			ToolStripRenderEventHandler eh = (ToolStripRenderEventHandler)Events [RenderStatusStripSizingGripEvent];
			if (eh != null)
				eh (this, e);
		}

		protected virtual void OnRenderToolStripBackground (ToolStripRenderEventArgs e)
		{
			ToolStripRenderEventHandler eh = (ToolStripRenderEventHandler)Events [RenderToolStripBackgroundEvent];
			if (eh != null)
				eh (this, e);
		}

		protected virtual void OnRenderToolStripBorder (ToolStripRenderEventArgs e)
		{
			ToolStripRenderEventHandler eh = (ToolStripRenderEventHandler)Events [RenderToolStripBorderEvent];
			if (eh != null)
				eh (this, e);
		}

		protected virtual void OnRenderToolStripContentPanelBackground (ToolStripContentPanelRenderEventArgs e)
		{
			ToolStripContentPanelRenderEventHandler eh = (ToolStripContentPanelRenderEventHandler)Events [RenderToolStripContentPanelBackgroundEvent];
			if (eh != null)
				eh (this, e);
		}

		protected virtual void OnRenderToolStripPanelBackground (ToolStripPanelRenderEventArgs e)
		{
			ToolStripPanelRenderEventHandler eh = (ToolStripPanelRenderEventHandler)Events [RenderToolStripPanelBackgroundEvent];
			if (eh != null)
				eh (this, e);
		}

		protected virtual void OnRenderToolStripStatusLabelBackground (ToolStripItemRenderEventArgs e)
		{
			ToolStripItemRenderEventHandler eh = (ToolStripItemRenderEventHandler)Events [RenderToolStripStatusLabelBackgroundEvent];
			if (eh != null)
				eh (this, e);
		}
		#endregion

		#region Public Events
		EventHandlerList events;

		EventHandlerList Events {
			get {
				if (events == null)
					events = new EventHandlerList ();
				return events;
			}
		}

		static object RenderArrowEvent = new object ();
		static object RenderButtonBackgroundEvent = new object ();
		static object RenderDropDownButtonBackgroundEvent = new object ();
		static object RenderGripEvent = new object ();
		static object RenderImageMarginEvent = new object ();
		static object RenderItemBackgroundEvent = new object ();
		static object RenderItemCheckEvent = new object ();
		static object RenderItemImageEvent = new object ();
		static object RenderItemTextEvent = new object ();
		static object RenderLabelBackgroundEvent = new object ();
		static object RenderMenuItemBackgroundEvent = new object ();
		static object RenderOverflowButtonBackgroundEvent = new object ();
		static object RenderSeparatorEvent = new object ();
		static object RenderSplitButtonBackgroundEvent = new object ();
		static object RenderStatusStripSizingGripEvent = new object ();
		static object RenderToolStripBackgroundEvent = new object ();
		static object RenderToolStripBorderEvent = new object ();
		static object RenderToolStripContentPanelBackgroundEvent = new object ();
		static object RenderToolStripPanelBackgroundEvent = new object ();
		static object RenderToolStripStatusLabelBackgroundEvent = new object ();

		public event ToolStripArrowRenderEventHandler RenderArrow {
			add { Events.AddHandler (RenderArrowEvent, value); }
			remove {Events.RemoveHandler (RenderArrowEvent, value); }
		}
		public event ToolStripItemRenderEventHandler RenderButtonBackground {
			add { Events.AddHandler (RenderButtonBackgroundEvent, value); }
			remove {Events.RemoveHandler (RenderButtonBackgroundEvent, value); }
		}
		public event ToolStripItemRenderEventHandler RenderDropDownButtonBackground {
			add { Events.AddHandler (RenderDropDownButtonBackgroundEvent, value); }
			remove {Events.RemoveHandler (RenderDropDownButtonBackgroundEvent, value); }
		}
		public event ToolStripGripRenderEventHandler RenderGrip {
			add { Events.AddHandler (RenderGripEvent, value); }
			remove {Events.RemoveHandler (RenderGripEvent, value); }
		}
		public event ToolStripRenderEventHandler RenderImageMargin {
			add { Events.AddHandler (RenderImageMarginEvent, value); }
			remove {Events.RemoveHandler (RenderImageMarginEvent, value); }
		}
		public event ToolStripItemRenderEventHandler RenderItemBackground {
			add { Events.AddHandler (RenderItemBackgroundEvent, value); }
			remove {Events.RemoveHandler (RenderItemBackgroundEvent, value); }
		}
		public event ToolStripItemImageRenderEventHandler RenderItemCheck {
			add { Events.AddHandler (RenderItemCheckEvent, value); }
			remove {Events.RemoveHandler (RenderItemCheckEvent, value); }
		}
		public event ToolStripItemImageRenderEventHandler RenderItemImage {
			add { Events.AddHandler (RenderItemImageEvent, value); }
			remove {Events.RemoveHandler (RenderItemImageEvent, value); }
		}
		public event ToolStripItemTextRenderEventHandler RenderItemText {
			add { Events.AddHandler (RenderItemTextEvent, value); }
			remove {Events.RemoveHandler (RenderItemTextEvent, value); }
		}
		public event ToolStripItemRenderEventHandler RenderLabelBackground {
			add { Events.AddHandler (RenderLabelBackgroundEvent, value); }
			remove {Events.RemoveHandler (RenderLabelBackgroundEvent, value); }
		}
		public event ToolStripItemRenderEventHandler RenderMenuItemBackground {
			add { Events.AddHandler (RenderMenuItemBackgroundEvent, value); }
			remove {Events.RemoveHandler (RenderMenuItemBackgroundEvent, value); }
		}
		public event ToolStripItemRenderEventHandler RenderOverflowButtonBackground {
			add { Events.AddHandler (RenderOverflowButtonBackgroundEvent, value); }
			remove {Events.RemoveHandler (RenderOverflowButtonBackgroundEvent, value); }
		}
		public event ToolStripSeparatorRenderEventHandler RenderSeparator {
			add { Events.AddHandler (RenderSeparatorEvent, value); }
			remove {Events.RemoveHandler (RenderSeparatorEvent, value); }
		}
		public event ToolStripItemRenderEventHandler RenderSplitButtonBackground {
			add { Events.AddHandler (RenderSplitButtonBackgroundEvent, value); }
			remove {Events.RemoveHandler (RenderSplitButtonBackgroundEvent, value); }
		}
		public event ToolStripRenderEventHandler RenderStatusStripSizingGrip {
			add { Events.AddHandler (RenderStatusStripSizingGripEvent, value); }
			remove {Events.RemoveHandler (RenderStatusStripSizingGripEvent, value); }
		}
		public event ToolStripRenderEventHandler RenderToolStripBackground {
			add { Events.AddHandler (RenderToolStripBackgroundEvent, value); }
			remove {Events.RemoveHandler (RenderToolStripBackgroundEvent, value); }
		}
		public event ToolStripRenderEventHandler RenderToolStripBorder {
			add { Events.AddHandler (RenderToolStripBorderEvent, value); }
			remove {Events.RemoveHandler (RenderToolStripBorderEvent, value); }
		}
		public event ToolStripContentPanelRenderEventHandler RenderToolStripContentPanelBackground {
			add { Events.AddHandler (RenderToolStripContentPanelBackgroundEvent, value); }
			remove {Events.RemoveHandler (RenderToolStripContentPanelBackgroundEvent, value); }
		}
		public event ToolStripPanelRenderEventHandler RenderToolStripPanelBackground {
			add { Events.AddHandler (RenderToolStripPanelBackgroundEvent, value); }
			remove {Events.RemoveHandler (RenderToolStripPanelBackgroundEvent, value); }
		}
		public event ToolStripItemRenderEventHandler RenderToolStripStatusLabelBackground {
			add { Events.AddHandler (RenderToolStripStatusLabelBackgroundEvent, value); }
			remove {Events.RemoveHandler (RenderToolStripStatusLabelBackgroundEvent, value); }
		}
		#endregion
		
		#region Private Methods
		internal static Image CreateMirrorImage (Image normalImage)
		{
			if (normalImage == null)
				return null;

			Bitmap b = new Bitmap (normalImage);
			b.RotateFlip (RotateFlipType.RotateNoneFlipX);

			return b;
		}

		private void DrawBackground (Graphics g, Rectangle bounds, Image image, ImageLayout layout)
		{
			// Center and Tile don't matter if the image is larger than the control
			if (layout == ImageLayout.Center || layout == ImageLayout.Tile)
				if (image.Size.Width >= bounds.Size.Width && image.Size.Height >= bounds.Size.Height)
					layout = ImageLayout.None;
					
			switch (layout) {
				case ImageLayout.None:
					g.DrawImageUnscaledAndClipped (image, bounds);
					break;
				case ImageLayout.Tile:
					int x = 0;
					int y = 0;
					
					while (y < bounds.Height) {
						while (x < bounds.Width) {
							g.DrawImageUnscaledAndClipped (image, bounds);
							x += image.Width;	
						}
						x = 0;
						y += image.Height;
					}
					break;
				case ImageLayout.Center:
					Rectangle r = new Rectangle ((bounds.Size.Width - image.Size.Width) / 2, (bounds.Size.Height - image.Size.Height) / 2, image.Width, image.Height);
					g.DrawImageUnscaledAndClipped (image, r);
					break;
				case ImageLayout.Stretch:
					g.DrawImage (image, bounds);
					break;
				case ImageLayout.Zoom:
					if (((float)image.Height / (float)image.Width) < ((float)bounds.Height / (float)bounds.Width)) {
						Rectangle rzoom = new Rectangle (0, 0, bounds.Width, (int)((float)bounds.Width * ((float)image.Height / (float)image.Width)));
						rzoom.Y = (bounds.Height - rzoom.Height)/ 2;
						g.DrawImage (image, rzoom);
					} else {
						Rectangle rzoom = new Rectangle (0, 0, (int)((float)bounds.Height * ((float)image.Width / (float)image.Height)), bounds.Height);
						rzoom.X = (bounds.Width - rzoom.Width) / 2;
						g.DrawImage (image, rzoom);
					}
					break;
			}
		}

		internal static void DrawRightArrow (Graphics g, Pen p, int x, int y)
		{
			g.DrawLine (p, x, y, x, y + 6);
			g.DrawLine (p, x + 1, y + 1, x + 1, y + 5);
			g.DrawLine (p, x + 2, y + 2, x + 2, y + 4);
			g.DrawLine (p, x + 2, y + 3, x + 3, y + 3);
		}

		internal static void DrawDownArrow (Graphics g, Pen p, int x, int y)
		{
			g.DrawLine (p, x + 1, y, x + 5, y);
			g.DrawLine (p, x + 2, y + 1, x + 4, y + 1);
			g.DrawLine (p, x + 3, y + 1, x + 3, y + 2);
		}

		private void DrawSizingGrip (Graphics g, Rectangle rect)
		{
			DrawGripBox (g, rect.Right - 5, rect.Bottom - 5);
			DrawGripBox (g, rect.Right - 9, rect.Bottom - 5);
			DrawGripBox (g, rect.Right - 5, rect.Bottom - 9);
			DrawGripBox (g, rect.Right - 13, rect.Bottom - 5);
			DrawGripBox (g, rect.Right - 5, rect.Bottom - 13);
			DrawGripBox (g, rect.Right - 9, rect.Bottom - 9);
		}
		
		private void DrawGripBox (Graphics g, int x, int y)
		{
			g.DrawRectangle (Pens.White, x + 1, y + 1, 1, 1);
			g.DrawRectangle (ThemeEngine.Current.ResPool.GetPen (Color.FromArgb (172, 168, 153)), x, y, 1, 1);
		}
		#endregion
	}
}