context: //
  // ScrollBarRenderer.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) 2006 Novell, Inc.
  //
  // Authors:
  //	Jonathan Pobst (monkey@jpobst.com)
  //
  
  using System.Drawing;
  using System.Windows.Forms.VisualStyles;
  
  namespace System.Windows.Forms
  {
  	public sealed class ScrollBarRenderer
  	{
  		#region Private Constructor
  		private ScrollBarRenderer () { }
  		#endregion
  
  		#region Public Static Methods
  		public static void DrawArrowButton (Graphics g, Rectangle bounds, ScrollBarArrowButtonState state)
  		{
  			if (!IsSupported)
  				throw new InvalidOperationException ();
  
  			VisualStyleRenderer vsr;
  
  			switch (state) {
  				case ScrollBarArrowButtonState.DownDisabled:
  					vsr = new VisualStyleRenderer (VisualStyleElement.ScrollBar.ArrowButton.DownDisabled);
  					break;
  				case ScrollBarArrowButtonState.DownHot:
  					vsr = new VisualStyleRenderer (VisualStyleElement.ScrollBar.ArrowButton.DownHot);
  					break;
  				case ScrollBarArrowButtonState.DownNormal:
  				default:
  					vsr = new VisualStyleRenderer (VisualStyleElement.ScrollBar.ArrowButton.DownNormal);
  					break;
  				case ScrollBarArrowButtonState.DownPressed:
  					vsr = new VisualStyleRenderer (VisualStyleElement.ScrollBar.ArrowButton.DownPressed);
  					break;
  				case ScrollBarArrowButtonState.LeftDisabled:
  					vsr = new VisualStyleRenderer (VisualStyleElement.ScrollBar.ArrowButton.LeftDisabled);
  					break;
  				case ScrollBarArrowButtonState.LeftHot:
  					vsr = new VisualStyleRenderer (VisualStyleElement.ScrollBar.ArrowButton.LeftHot);
  					break;
  				case ScrollBarArrowButtonState.LeftNormal:
  					vsr = new VisualStyleRenderer (VisualStyleElement.ScrollBar.ArrowButton.LeftNormal);
  					break;
  				case ScrollBarArrowButtonState.LeftPressed:
  					vsr = new VisualStyleRenderer (VisualStyleElement.ScrollBar.ArrowButton.LeftPressed);
  					break;
  				case ScrollBarArrowButtonState.RightDisabled:
  					vsr = new VisualStyleRenderer (VisualStyleElement.ScrollBar.ArrowButton.RightDisabled);
  					break;
  				case ScrollBarArrowButtonState.RightHot:
  					vsr = new VisualStyleRenderer (VisualStyleElement.ScrollBar.ArrowButton.RightHot);
  					break;
  				case ScrollBarArrowButtonState.RightNormal:
  					vsr = new VisualStyleRenderer (VisualStyleElement.ScrollBar.ArrowButton.RightNormal);
  					break;
  				case ScrollBarArrowButtonState.RightPressed:
  					vsr = new VisualStyleRenderer (VisualStyleElement.ScrollBar.ArrowButton.RightPressed);
  					break;
  				case ScrollBarArrowButtonState.UpDisabled:
  					vsr = new VisualStyleRenderer (VisualStyleElement.ScrollBar.ArrowButton.UpDisabled);
  					break;
  				case ScrollBarArrowButtonState.UpHot:
  					vsr = new VisualStyleRenderer (VisualStyleElement.ScrollBar.ArrowButton.UpHot);
  					break;
  				case ScrollBarArrowButtonState.UpNormal:
  					vsr = new VisualStyleRenderer (VisualStyleElement.ScrollBar.ArrowButton.UpNormal);
  					break;
  				case ScrollBarArrowButtonState.UpPressed:
  					vsr = new VisualStyleRenderer (VisualStyleElement.ScrollBar.ArrowButton.UpPressed);
  					break;
  			}
  			
  			vsr.DrawBackground(g, bounds);
  		}
  
  		public static void DrawHorizontalThumb (Graphics g, Rectangle bounds, ScrollBarState state)
  		{
  			if (!IsSupported)
  				throw new InvalidOperationException ();
  
  			VisualStyleRenderer vsr;
  
  			switch (state) {
  				case ScrollBarState.Disabled:
  					vsr = new VisualStyleRenderer (VisualStyleElement.ScrollBar.ThumbButtonHorizontal.Disabled);
  					break;
  				case ScrollBarState.Hot:
  					vsr = new VisualStyleRenderer (VisualStyleElement.ScrollBar.ThumbButtonHorizontal.Hot);
  					break;
  				case ScrollBarState.Normal:
  				default:
  					vsr = new VisualStyleRenderer (VisualStyleElement.ScrollBar.ThumbButtonHorizontal.Normal);
  					break;
  				case ScrollBarState.Pressed:
  					vsr = new VisualStyleRenderer (VisualStyleElement.ScrollBar.ThumbButtonHorizontal.Pressed);
  					break;
  			}
  
  			vsr.DrawBackground (g, bounds);
  		}
  
  		public static void DrawHorizontalThumbGrip (Graphics g, Rectangle bounds, ScrollBarState state)
  		{
  			if (!IsSupported)
  				throw new InvalidOperationException ();
  
  			VisualStyleRenderer vsr = new VisualStyleRenderer (VisualStyleElement.ScrollBar.GripperHorizontal.Normal);
  
  			vsr.DrawBackground (g, bounds);
  		}
  
  		public static void DrawLeftHorizontalTrack (Graphics g, Rectangle bounds, ScrollBarState state)
  		{
  			if (!IsSupported)
  				throw new InvalidOperationException ();
  
  			VisualStyleRenderer vsr;
  
  			switch (state) {
  				case ScrollBarState.Disabled:
  					vsr = new VisualStyleRenderer (VisualStyleElement.ScrollBar.LeftTrackHorizontal.Disabled);
  					break;
  				case ScrollBarState.Hot:
  					vsr = new VisualStyleRenderer (VisualStyleElement.ScrollBar.LeftTrackHorizontal.Hot);
  					break;
  				case ScrollBarState.Normal:
  				default:
  					vsr = new VisualStyleRenderer (VisualStyleElement.ScrollBar.LeftTrackHorizontal.Normal);
  					break;
  				case ScrollBarState.Pressed:
  					vsr = new VisualStyleRenderer (VisualStyleElement.ScrollBar.LeftTrackHorizontal.Pressed);
  					break;
  			}
  
  			vsr.DrawBackground (g, bounds);
  		}
  
  		public static void DrawLowerVerticalTrack (Graphics g, Rectangle bounds, ScrollBarState state)
  		{
  			if (!IsSupported)
  				throw new InvalidOperationException ();
  
  			VisualStyleRenderer vsr;
  
  			switch (state) {
  				case ScrollBarState.Disabled:
  					vsr = new VisualStyleRenderer (VisualStyleElement.ScrollBar.LowerTrackVertical.Disabled);
  					break;
  				case ScrollBarState.Hot:
  					vsr = new VisualStyleRenderer (VisualStyleElement.ScrollBar.LowerTrackVertical.Hot);
  					break;
  				case ScrollBarState.Normal:
  				default:
  					vsr = new VisualStyleRenderer (VisualStyleElement.ScrollBar.LowerTrackVertical.Normal);
  					break;
  				case ScrollBarState.Pressed:
  					vsr = new VisualStyleRenderer (VisualStyleElement.ScrollBar.LowerTrackVertical.Pressed);
  					break;
  			}
  
  			vsr.DrawBackground (g, bounds);
  		}
  		
  		public static void DrawRightHorizontalTrack (Graphics g, Rectangle bounds, ScrollBarState state)
  		{
  			if (!IsSupported)
  				throw new InvalidOperationException ();
  
  			VisualStyleRenderer vsr;
  
  			switch (state) {
  				case ScrollBarState.Disabled:
  					vsr = new VisualStyleRenderer (VisualStyleElement.ScrollBar.RightTrackHorizontal.Disabled);
  					break;
  				case ScrollBarState.Hot:
  					vsr = new VisualStyleRenderer (VisualStyleElement.ScrollBar.RightTrackHorizontal.Hot);
  					break;
  				case ScrollBarState.Normal:
  				default:
  					vsr = new VisualStyleRenderer (VisualStyleElement.ScrollBar.RightTrackHorizontal.Normal);
  					break;
  				case ScrollBarState.Pressed:
  					vsr = new VisualStyleRenderer (VisualStyleElement.ScrollBar.RightTrackHorizontal.Pressed);
  					break;
  			}
  
  			vsr.DrawBackground (g, bounds);
  		}
  
  		public static void DrawSizeBox (Graphics g, Rectangle bounds, ScrollBarSizeBoxState state)
  		{
  			if (!IsSupported)
  				throw new InvalidOperationException ();
  
  			VisualStyleRenderer vsr;
  
  			switch (state) {
  				case ScrollBarSizeBoxState.LeftAlign:
  				default:
  					vsr = new VisualStyleRenderer (VisualStyleElement.ScrollBar.SizeBox.LeftAlign);
  					break;
  				case ScrollBarSizeBoxState.RightAlign:
  					vsr = new VisualStyleRenderer (VisualStyleElement.ScrollBar.SizeBox.RightAlign);
  					break;
  			}
  
  			vsr.DrawBackground (g, bounds);
  		}
  
  		public static void DrawUpperVerticalTrack (Graphics g, Rectangle bounds, ScrollBarState state)
  		{
  			if (!IsSupported)
  				throw new InvalidOperationException ();
  
  			VisualStyleRenderer vsr;
  
  			switch (state) {
  				case ScrollBarState.Disabled:
  					vsr = new VisualStyleRenderer (VisualStyleElement.ScrollBar.UpperTrackVertical.Disabled);
  					break;
  				case ScrollBarState.Hot:
  					vsr = new VisualStyleRenderer (VisualStyleElement.ScrollBar.UpperTrackVertical.Hot);
  					break;
  				case ScrollBarState.Normal:
  				default:
  					vsr = new VisualStyleRenderer (VisualStyleElement.ScrollBar.UpperTrackVertical.Normal);
  					break;
  				case ScrollBarState.Pressed:
  					vsr = new VisualStyleRenderer (VisualStyleElement.ScrollBar.UpperTrackVertical.Pressed);
  					break;
  			}
  
  			vsr.DrawBackground (g, bounds);
  		}
  
  		public static void DrawVerticalThumb (Graphics g, Rectangle bounds, ScrollBarState state)
  		{
  			if (!IsSupported)
  				throw new InvalidOperationException ();
  
  			VisualStyleRenderer vsr;
  
  			switch (state) {
  				case ScrollBarState.Disabled:
  					vsr = new VisualStyleRenderer (VisualStyleElement.ScrollBar.ThumbButtonVertical.Disabled);
  					break;
  				case ScrollBarState.Hot:
  					vsr = new VisualStyleRenderer (VisualStyleElement.ScrollBar.ThumbButtonVertical.Hot);
  					break;
  				case ScrollBarState.Normal:
  				default:
  					vsr = new VisualStyleRenderer (VisualStyleElement.ScrollBar.ThumbButtonVertical.Normal);
  					break;
  				case ScrollBarState.Pressed:
  					vsr = new VisualStyleRenderer (VisualStyleElement.ScrollBar.ThumbButtonVertical.Pressed);
  					break;
  			}
  
  			vsr.DrawBackground (g, bounds);
  		}
  
  		public static void DrawVerticalThumbGrip (Graphics g, Rectangle bounds, ScrollBarState state)
  		{
  			if (!IsSupported)
  				throw new InvalidOperationException ();
  
  			VisualStyleRenderer vsr = new VisualStyleRenderer (VisualStyleElement.ScrollBar.GripperVertical.Normal); ;
  
  			vsr.DrawBackground (g, bounds);
  		}
  
  		public static Size GetSizeBoxSize (Graphics g, ScrollBarState state)
  		{
  			if (!IsSupported)
  				throw new InvalidOperationException ();
  
  			VisualStyleRenderer vsr = new VisualStyleRenderer (VisualStyleElement.ScrollBar.SizeBox.LeftAlign);
  			
  
gt: 			return vsr.GetPartSize(g, ThemeSizeType.Draw);