linux-packaging-mono/mcs/class/referencesource/System.Web.DataVisualization/Common/General/AxisScrollBar.cs

//-------------------------------------------------------------
// <copyright company=<3D>Microsoft Corporation<6F>>
//   Copyright <20> Microsoft Corporation. All Rights Reserved.
// </copyright>
//-------------------------------------------------------------
// @owner=alexgor, deliant
//=================================================================
//  File:		AxisScrollBar.cs
//
//  Namespace:	System.Web.UI.WebControls[Windows.Forms].Charting
//
//	Classes:	AxisScrollBar, ScrollBarEventArgs
//
//  Purpose:	AxisScrollBar class represent axis scroolbar. There 
//              is a big difference how this UI  functionality 
//              implemented for Windows Forms and ASP.NET. For 
//              Windows Forms a custom drawn scrollbar control is
//              drawn in the chart which reacts to the mouse input and 
//              changes current axis data scaleView.
//
//              ASP.NET version uses client-side scripting and partial
//              loading of data segment by segment. Due to the fact
//              that scrollbar operates on the client side not all
//              functionality of WindowsForms scrollbar is supported.
//              
//	Reviewed:	AG - March 16, 2007
//
//===================================================================

#if WINFORMS_CONTROL

#region Used namespaces

using System;
using System.ComponentModel;
using System.Drawing;
using System.Drawing.Design;
using System.Drawing.Drawing2D;
using System.Windows.Forms;
using System.Windows.Forms.DataVisualization.Charting;
using System.Windows.Forms.DataVisualization.Charting.Data;
using System.Windows.Forms.DataVisualization.Charting.ChartTypes;
using System.Windows.Forms.DataVisualization.Charting.Utilities;
using System.Windows.Forms.DataVisualization.Charting.Borders3D;
using System.Diagnostics.CodeAnalysis;

#endregion

namespace System.Windows.Forms.DataVisualization.Charting
{
	#region Scroll bar enumerations

	/// <summary>
	/// An enumeration of scrollbar button types.
	/// </summary>
    public enum ScrollBarButtonType
	{
		/// <summary>
		/// Thumb tracker button.
		/// </summary>
		ThumbTracker,

		/// <summary>
		/// Scroll by substracting small distance.
		/// </summary>
		SmallDecrement,

		/// <summary>
		/// Scroll by adding small distance.
		/// </summary>
		SmallIncrement,

		/// <summary>
		/// Scroll by substracting large distance.
		/// </summary>
		LargeDecrement,

		/// <summary>
		/// Scroll by adding large distance.
		/// </summary>
		LargeIncrement,

		/// <summary>
		/// Zoom reset button.
		/// </summary>
		ZoomReset
	}

	/// <summary>
	/// An enumeration of scrollbar button style flags.
	/// </summary>
	[Flags]
    public enum ScrollBarButtonStyles
	{
		/// <summary>
		/// No buttons are shown.
		/// </summary>
		None = 0,

		/// <summary>
		/// Small increment or decrement buttons are shown.
		/// </summary>
		SmallScroll = 1,

		/// <summary>
		/// Reset zoom buttons are shown.
		/// </summary>
		ResetZoom = 2,

		/// <summary>
		/// All buttons are shown. 
		/// </summary>
		All = SmallScroll | ResetZoom
	}

	#endregion

	/// <summary>
    /// AxisScrollBar class represents the axis scrollbar. It is exposed as the
    /// ScrollBar property of the Axis class. It contains scrollbar appearance
    /// properties and drawing methods.
	/// </summary>
    public class AxisScrollBar : IDisposable
	{
        #region Scroll bar fields

        // Reference to the axis data scaleView class
		internal Axis					axis = null;

		// Indicates that scollbra will be drawn
		private bool					_enabled = true;

        // Axis data scaleView scroll bar style
		private	ScrollBarButtonStyles	_scrollBarButtonStyle = ScrollBarButtonStyles.All;

		// Axis data scaleView scroll bar size
		private	double					_scrollBarSize = 14.0;

		// Index of the pressed butoon in the scroll bar
		private	int						_pressedButtonType = int.MaxValue;

		// Axis data scaleView scroll bar buttons color
		private	Color					_buttonColor = Color.Empty;

		// Axis data scaleView scroll bar back color
		private	Color					_backColor = Color.Empty;

		// Axis data scaleView scroll bar lines color
		private	Color					_lineColor = Color.Empty;

		// Current scroll bar drawing colors
		private	Color					_buttonCurrentColor = Color.Empty;
		private	Color					_backCurrentColor = Color.Empty;
		private	Color					_lineCurrentColor = Color.Empty;

		// Last mouse click mouse and scaleView position
		private PointF					_lastClickMousePosition = PointF.Empty;
		private double					_lastClickViewPosition = double.NaN;

		// Timer used to scroll the data while selecting
		private	System.Windows.Forms.Timer	_scrollTimer = new System.Windows.Forms.Timer();

		// Scroll size and direction when AutoScroll is set
		private	MouseEventArgs			_mouseArguments = null;

		// Position of the scrollbar (true - edge of PlotArea, false - edge of chart area)
		private bool					_isPositionedInside = true;

		#endregion

		#region Scroll bar constructors and initialization

		/// <summary>
		/// AxisScrollBar constructor.
		/// </summary>
		public AxisScrollBar()
		{
		}

		/// <summary>
		/// Axis scroll bar constructor.
		/// </summary>
		/// <param name="axis">Reference to the axis class.</param>
        internal AxisScrollBar(Axis axis)
		{
			// Save reference to the axis data scaleView
			this.axis = axis;
		}

		/// <summary>
		/// Initialize axis scroll bar class.
		/// </summary>
		internal void Initialize()
		{
		}

        #endregion

#region Scroll bar properties
        
        /// <summary>
		/// Gets or sets a flag which indicates whether scroll bar is positioned inside or outside of chart area.
		/// </summary>
		[
        SRCategory("CategoryAttributeAxisView"),
		Bindable(true),
		DefaultValue(true),
		SRDescription("DescriptionAttributeAxisScrollBar_PositionInside")
		]
		public bool IsPositionedInside
		{
			get
			{
				return _isPositionedInside;
			}
			set
			{
				if(_isPositionedInside != value)
				{
					_isPositionedInside = value;
					if(axis != null)
					{
						axis.ChartArea.Invalidate();
					}
				}
			}
		}


		/// <summary>
		/// Gets or sets a flag which indicates whether the scroll bar is enabled.
		/// </summary>
		[
		SRCategory("CategoryAttributeAxisView"),
		Bindable(true),
		DefaultValue(true),
		SRDescription("DescriptionAttributeAxisScrollBar_Enabled")
		]
		public bool Enabled
		{
			get
			{
				return _enabled;
			}
			set
			{
				if(_enabled != value)
				{
					_enabled = value;
					if(axis != null)
					{
						axis.ChartArea.Invalidate();
					}
				}
			}
		}

		/// <summary>
		/// Gets the ChartArea that contains this scrollbar.
		/// </summary>
		[
		Browsable(false),
		Bindable(false),
		DesignerSerializationVisibilityAttribute(DesignerSerializationVisibility.Hidden),
		SerializationVisibilityAttribute(SerializationVisibility.Hidden)
		]
		public ChartArea ChartArea
		{
			get
			{
				return this.axis.ChartArea;
			}
		}

		/// <summary>
		/// Gets the Axis that contains this scrollbar.
		/// </summary>
		[
		Browsable(false),
		Bindable(false),
		DesignerSerializationVisibilityAttribute(DesignerSerializationVisibility.Hidden),
		SerializationVisibilityAttribute(SerializationVisibility.Hidden)
		]
		public Axis Axis
		{
			get
			{
				return this.axis;
			}
		}

		/// <summary>
		/// Gets or sets the style of the scrollbar button.
		/// </summary>
		[
		SRCategory("CategoryAttributeAxisView"),
		Bindable(true),
#if WEB_OLAP
        DefaultValue(ScrollBarButtonStyle.SmallScroll),
#else
		DefaultValue(ScrollBarButtonStyles.All),
#endif
		SRDescription("DescriptionAttributeAxisScrollBar_Buttons"),
        Editor(Editors.FlagsEnumUITypeEditor.Editor, Editors.FlagsEnumUITypeEditor.Base)
		]
		public ScrollBarButtonStyles ButtonStyle
		{
			get
			{
				return _scrollBarButtonStyle;
			}
			set
			{
				if(_scrollBarButtonStyle != value)
				{
					_scrollBarButtonStyle = value;
					if(axis != null)
					{
						axis.ChartArea.Invalidate();
					}
				}
			}
		}

		/// <summary>
		/// Gets or sets the size of the scrollbar.
		/// </summary>
		[
		SRCategory("CategoryAttributeAxisView"),
		Bindable(true),
		DefaultValue(14.0),
		SRDescription("DescriptionAttributeAxisScrollBar_Size"),
		]
		public double Size
		{
			get
			{
				return _scrollBarSize;
			}
			set
			{
				if(_scrollBarSize != value)
				{
					// Check values range
					if(value < 5.0 || value > 20.0)
					{
                        throw (new ArgumentOutOfRangeException("value", SR.ExceptionScrollBarSizeInvalid));
					}
					_scrollBarSize = value;
					if(axis != null)
					{
						axis.ChartArea.Invalidate();
					}
				}
			}
		}

		/// <summary>
		/// Gets or sets the button color of the scrollbar.
		/// </summary>
		[
		SRCategory("CategoryAttributeAxisView"),
		Bindable(true),
		DefaultValue(typeof(Color), ""),
		SRDescription("DescriptionAttributeAxisScrollBar_ButtonColor"),
        TypeConverter(typeof(ColorConverter)),
        Editor(Editors.ChartColorEditor.Editor, Editors.ChartColorEditor.Base)
		]
		public Color ButtonColor
		{
			get
			{
				return _buttonColor;
			}
			set
			{
				if(_buttonColor != value)
				{
					_buttonColor = value;
					if(axis != null)
					{
						axis.ChartArea.Invalidate();
					}
				}
			}
		}

		/// <summary>
		/// Gets or sets the line color of the scrollbar.
		/// </summary>
		[
		SRCategory("CategoryAttributeAxisView"),
		Bindable(true),
		DefaultValue(typeof(Color), ""),
        SRDescription("DescriptionAttributeLineColor"),
        TypeConverter(typeof(ColorConverter)),
        Editor(Editors.ChartColorEditor.Editor, Editors.ChartColorEditor.Base)
		]
		public Color LineColor
		{
			get
			{
				return _lineColor;
			}
			set
			{
				if(_lineColor != value)
				{
					_lineColor = value;
					if(axis != null)
					{
						axis.ChartArea.Invalidate();
					}
				}
			}
		}

		/// <summary>
		/// Gets or sets the background color of the scrollbar.
		/// </summary>
		[
		SRCategory("CategoryAttributeAxisView"),
		Bindable(true),
		DefaultValue(typeof(Color), ""),
        SRDescription("DescriptionAttributeBackColor"),
        TypeConverter(typeof(ColorConverter)),
        Editor(Editors.ChartColorEditor.Editor, Editors.ChartColorEditor.Base)
		]
		public Color BackColor
		{
			get
			{
				return _backColor;
			}
			set
			{
				if(_backColor != value)
				{
					_backColor = value;
					if(axis != null)
					{
						axis.ChartArea.Invalidate();
					}
				}
			}
		}

#endregion

#region Scroll bar public methods

		/// <summary>
		/// This method returns true if the scrollbar is visible.
		/// </summary>
        [Browsable(false)]
        [Utilities.SerializationVisibility(Utilities.SerializationVisibility.Hidden)]
		public bool IsVisible
		{
            get
            {
                // Check scroll bar enabled flag
                if (!this.Enabled)
                {
                    return false;
                }

                // Do not show scroll bars while printing
                if (this.axis == null ||
                    this.axis.ChartArea == null ||
                    this.axis.ChartArea.Common == null ||
                    this.axis.ChartArea.Common.ChartPicture == null ||
                    this.axis.ChartArea.Common.ChartPicture.isPrinting)
                {
                    return false;
                }

#if SUBAXES
			// Scrollbar is not supported on the sub axis
			if(this.axis.IsSubAxis)
			{
				return false;
			}
#endif // SUBAXES

                // Check if data scaleView size in percentage is less than 100%
                return (GetDataViewPercentage() < 100.0) ? true : false;
            }
		}

#endregion

#region Scroll bar painting methods

		/// <summary>
		/// Draws axis scroll bar.
		/// </summary>
		/// <param name="graph">Reference to the Chart Graphics object.</param>
		internal void Paint( ChartGraphics graph )
		{
			// Scroll bar border width
			int	borderWidth = 1;

			// Scroll bar should not be visible
			if(!this.IsVisible)
			{
				return;
            }

#if SUBAXES
			// Scrollbar not supported on sub axis
			if( this.axis != null &&  this.axis.IsSubAxis)
			{
				return;
			}
#endif //SUBAXES

            // Set current scroll bar colors
			_buttonCurrentColor = this._buttonColor;
			_backCurrentColor = this._backColor;
			_lineCurrentColor = this._lineColor;

			// Make sure the current colors are not empty
			if(_buttonCurrentColor == Color.Empty)
			{
				_buttonCurrentColor = this.axis.ChartArea.BackColor;
				if(_buttonCurrentColor == Color.Empty)
				{
					_buttonCurrentColor = Color.DarkGray;
				}
			}
			if(_backCurrentColor == Color.Empty)
			{
				_backCurrentColor = this.axis.ChartArea.BackColor;
				if(_backCurrentColor == Color.Empty)
				{
					_backCurrentColor = Color.LightGray;
				}
			}
			if(_lineCurrentColor == Color.Empty)
			{
				_lineCurrentColor = this.axis.LineColor;
				if(_lineCurrentColor == Color.Empty)
				{
					_lineCurrentColor = Color.Black;
				}
			}

			// Get scroll bar rectangle
			RectangleF	scrollBarRect = this.GetScrollBarRect();

			// Fill scroll bar background
			graph.FillRectangleRel( 
				scrollBarRect, 
				_backCurrentColor, 
				ChartHatchStyle.None, 
				"", 
				ChartImageWrapMode.Tile, 				
				Color.Empty,
				ChartImageAlignmentStyle.Center,
				GradientStyle.None, 
				Color.Empty, 
				_lineCurrentColor,
				borderWidth, 
				ChartDashStyle.Solid, 
				Color.Empty, 
				0, 
				PenAlignment.Outset );

			// Fill rectangle between to neighbour scroll bars
			PaintScrollBarConnectionRect(graph, scrollBarRect, borderWidth);

			// Get scroll bar client rectangle
			SizeF	borderRelativeSize = new SizeF(borderWidth, borderWidth);
			borderRelativeSize = graph.GetRelativeSize(borderRelativeSize);
			RectangleF scrollBarClientRect = new RectangleF(scrollBarRect.Location, scrollBarRect.Size);
			scrollBarClientRect.Inflate(-borderRelativeSize.Width, -borderRelativeSize.Height);

			// Draw all button types
            foreach (ScrollBarButtonType buttonType in Enum.GetValues(typeof(ScrollBarButtonType)))
			{
                // Get button rectangle
				RectangleF buttonRect = this.GetScrollBarButtonRect(scrollBarClientRect, (ScrollBarButtonType)buttonType);

				// Paint button
				if(!buttonRect.IsEmpty)
				{
					PaintScrollBar3DButton(
						graph, 
						buttonRect, 
						((ScrollBarButtonType)this._pressedButtonType) == (ScrollBarButtonType)buttonType, 
						(ScrollBarButtonType)buttonType);
				}
			}

            if( this.ChartArea.Common.ProcessModeRegions )
			{
				SetHotRegionElement( this.ChartArea.Common );
			}
		}
		
		/// <summary>
		/// Fills a connection rectangle between two scoll bars.
		/// </summary>
		/// <param name="graph">Chart graphics.</param>
		/// <param name="scrollBarRect">Scroll bar position.</param>
		/// <param name="borderWidth">Border width.</param>
		private void PaintScrollBarConnectionRect( 
			ChartGraphics graph, 
			RectangleF scrollBarRect,
			int borderWidth)
		{
			// Do not draw anything if scroll bar is vertical
			if(this.axis.AxisPosition == AxisPosition.Left || 
				this.axis.AxisPosition == AxisPosition.Right)
			{
				return;
			}

			// Check if scoll bar is shown on the left/right sides of 
			// the plotting area and get their sizes in relative coordinates
			float	leftSize = 0f;
			float	rightSize = 0f;

			foreach(Axis a in this.axis.ChartArea.Axes)
			{
				if(a.AxisPosition == AxisPosition.Left && a.ScrollBar.IsVisible && a.ScrollBar.IsPositionedInside == this.axis.ScrollBar.IsPositionedInside)
				{
					leftSize = (float)a.ScrollBar.GetScrollBarRelativeSize();
				}
				if(a.AxisPosition == AxisPosition.Right && a.ScrollBar.IsVisible && a.ScrollBar.IsPositionedInside == this.axis.ScrollBar.IsPositionedInside)
				{
					rightSize = (float)a.ScrollBar.GetScrollBarRelativeSize();
				}
			}

			// Prepare generic rectangle coordinates
			RectangleF	connectorRect = new RectangleF(scrollBarRect.Location, scrollBarRect.Size);

			// Prepare coordinates and fill area to the left
			if(leftSize > 0f)
			{
				connectorRect.X = scrollBarRect.X - leftSize;
				connectorRect.Width = leftSize;

				// Fill background
				graph.FillRectangleRel( 
					connectorRect, 
					_backCurrentColor, 
					ChartHatchStyle.None, 
					"", 
					ChartImageWrapMode.Tile, 				
					Color.Empty,
					ChartImageAlignmentStyle.Center,
					GradientStyle.None, 
					Color.Empty, 
					_lineCurrentColor,
					borderWidth, 
					ChartDashStyle.Solid, 
					Color.Empty, 
					0, 
					PenAlignment.Outset );
			}

			// Prepare coordinates and fill area to the right
			if(rightSize > 0f)
			{
				connectorRect.X = scrollBarRect.Right;
				connectorRect.Width = rightSize;

				// Fill background
				graph.FillRectangleRel( 
					connectorRect, 
					_backCurrentColor, 
					ChartHatchStyle.None, 
					"", 
					ChartImageWrapMode.Tile, 				
					Color.Empty,
					ChartImageAlignmentStyle.Center,
					GradientStyle.None, 
					Color.Empty, 
					_lineCurrentColor,
					borderWidth, 
					ChartDashStyle.Solid, 
					Color.Empty, 
					0, 
					PenAlignment.Outset );
			}

		}

		/// <summary>
		/// Draws 3D button in the scroll bar
		/// </summary>
		/// <param name="graph">Chart graphics.</param>
		/// <param name="buttonRect">Button position.</param>
		/// <param name="pressedState">Indicates that button is pressed.</param>
		/// <param name="buttonType">Button type to draw.</param>
		internal void PaintScrollBar3DButton( 
			ChartGraphics graph, 
			RectangleF buttonRect, 
			bool pressedState, 
			ScrollBarButtonType buttonType)
		{
			// Page Up/Down buttons do not require drawing
			if(buttonType == ScrollBarButtonType.LargeIncrement || buttonType == ScrollBarButtonType.LargeDecrement)
			{
				return;
			}

			// Get 3 levels of colors for button drawing
			Color	darkerColor = ChartGraphics.GetGradientColor(_buttonCurrentColor, Color.Black, 0.5);
			Color	darkestColor = ChartGraphics.GetGradientColor(_buttonCurrentColor, Color.Black, 0.8);
			Color	lighterColor = ChartGraphics.GetGradientColor(_buttonCurrentColor, Color.White, 0.5);

			// Fill button rectangle background
			graph.FillRectangleRel( 
				buttonRect, 
				_buttonCurrentColor, 
				ChartHatchStyle.None, 
				"", 
				ChartImageWrapMode.Tile, 				
				Color.Empty,
				ChartImageAlignmentStyle.Center,
				GradientStyle.None, 
				Color.Empty, 
				darkerColor,
				(pressedState) ? 1 : 0, 
				ChartDashStyle.Solid, 
				Color.Empty, 
				0, 
				PenAlignment.Outset );

			// Check if 2 or 1 pixel border will be drawn (if size too small)
			bool	singlePixelBorder = this.Size <= 12;

			// Draw 3D effect around the button when not pressed
			if(!pressedState)
			{
				// Get relative size of 1 pixel
				SizeF	pixelRelativeSize = new SizeF(1, 1);
				pixelRelativeSize = graph.GetRelativeSize(pixelRelativeSize);

				// Draw top/left border with button color
				graph.DrawLineRel(
					(singlePixelBorder) ? lighterColor : _buttonCurrentColor, 1, ChartDashStyle.Solid,
					new PointF(buttonRect.X, buttonRect.Bottom),
					new PointF(buttonRect.X, buttonRect.Top));
				graph.DrawLineRel(
					(singlePixelBorder) ? lighterColor : _buttonCurrentColor, 1, ChartDashStyle.Solid,
					new PointF(buttonRect.Left, buttonRect.Y),
					new PointF(buttonRect.Right, buttonRect.Y));

				// Draw right/bottom border with the darkest color
				graph.DrawLineRel(
					(singlePixelBorder) ? darkerColor : darkestColor, 1, ChartDashStyle.Solid,
					new PointF(buttonRect.Right, buttonRect.Bottom),
					new PointF(buttonRect.Right, buttonRect.Top));
				graph.DrawLineRel(
					(singlePixelBorder) ? darkerColor : darkestColor, 1, ChartDashStyle.Solid,
					new PointF(buttonRect.Left, buttonRect.Bottom),
					new PointF(buttonRect.Right, buttonRect.Bottom));

				if(!singlePixelBorder)
				{
					// Draw right/bottom border (offset 1) with the dark color
					graph.DrawLineRel(
						darkerColor, 1, ChartDashStyle.Solid,
						new PointF(buttonRect.Right-pixelRelativeSize.Width, buttonRect.Bottom-pixelRelativeSize.Height),
						new PointF(buttonRect.Right-pixelRelativeSize.Width, buttonRect.Top+pixelRelativeSize.Height));
					graph.DrawLineRel(
						darkerColor, 1, ChartDashStyle.Solid,
						new PointF(buttonRect.Left+pixelRelativeSize.Width, buttonRect.Bottom-pixelRelativeSize.Height),
						new PointF(buttonRect.Right-pixelRelativeSize.Width, buttonRect.Bottom-pixelRelativeSize.Height));

					// Draw top/left border (offset 1) with lighter color
					graph.DrawLineRel(
						lighterColor, 1, ChartDashStyle.Solid,
						new PointF(buttonRect.X+pixelRelativeSize.Width, buttonRect.Bottom-pixelRelativeSize.Height),
						new PointF(buttonRect.X+pixelRelativeSize.Width, buttonRect.Top+pixelRelativeSize.Height));
					graph.DrawLineRel(
						lighterColor, 1, ChartDashStyle.Solid,
						new PointF(buttonRect.Left+pixelRelativeSize.Width, buttonRect.Y+pixelRelativeSize.Height),
						new PointF(buttonRect.Right-pixelRelativeSize.Width, buttonRect.Y+pixelRelativeSize.Height));
				}
			}

			// Check axis orientation
			bool	verticalAxis = (this.axis.AxisPosition == AxisPosition.Left || 
				this.axis.AxisPosition == AxisPosition.Right) ? true : false;

			// Set graphics transformation for button pressed mode
			float pressedShifting = (singlePixelBorder) ? 0.5f : 1f;
			if(pressedState)
			{
				graph.TranslateTransform(pressedShifting, pressedShifting);
			}

			// Draw button image
			RectangleF	buttonAbsRect = graph.GetAbsoluteRectangle(buttonRect);
			float		imageOffset = (singlePixelBorder) ? 2 : 3;
			switch(buttonType)
			{
				case(ScrollBarButtonType.SmallDecrement):
				{
					// Calculate triangal points position
					PointF[] points = new PointF[3];
					if(verticalAxis)
					{
						points[0].X = buttonAbsRect.X + imageOffset;
						points[0].Y = buttonAbsRect.Y + (imageOffset + 1f);
						points[1].X = buttonAbsRect.X  + buttonAbsRect.Width/2f;
						points[1].Y = buttonAbsRect.Bottom - imageOffset;
						points[2].X = buttonAbsRect.Right - imageOffset;
						points[2].Y = buttonAbsRect.Y + (imageOffset + 1f);
					}
					else
					{
						points[0].X = buttonAbsRect.X + imageOffset;
						points[0].Y = buttonAbsRect.Y + buttonAbsRect.Height/2f;
						points[1].X = buttonAbsRect.Right - (imageOffset + 1f);
						points[1].Y = buttonAbsRect.Y + imageOffset;
						points[2].X = buttonAbsRect.Right - (imageOffset + 1f);
						points[2].Y = buttonAbsRect.Bottom - imageOffset;
					}

                    using (Brush brush = new SolidBrush(this._lineCurrentColor))
                    {
                        graph.FillPolygon(brush, points);
                    }
					break;
				}
				case(ScrollBarButtonType.SmallIncrement):
				{
					// Calculate triangal points position
					PointF[] points = new PointF[3];
					if(verticalAxis)
					{
						points[0].X = buttonAbsRect.X + imageOffset;
						points[0].Y = buttonAbsRect.Bottom - (imageOffset + 1f);
						points[1].X = buttonAbsRect.X  + buttonAbsRect.Width/2f;
						points[1].Y = buttonAbsRect.Y + imageOffset;
						points[2].X = buttonAbsRect.Right - imageOffset;
						points[2].Y = buttonAbsRect.Bottom - (imageOffset + 1f);
					}
					else
					{
						points[0].X = buttonAbsRect.Right - imageOffset;
						points[0].Y = buttonAbsRect.Y + buttonAbsRect.Height/2f;
						points[1].X = buttonAbsRect.X + (imageOffset + 1f);
						points[1].Y = buttonAbsRect.Y + imageOffset;
						points[2].X = buttonAbsRect.X + (imageOffset + 1f);
						points[2].Y = buttonAbsRect.Bottom - imageOffset;
					}

                    using (Brush brush = new SolidBrush(this._lineCurrentColor))
                    {
                        graph.FillPolygon(brush, points);
                    }
					break;
				}
				case(ScrollBarButtonType.ZoomReset):
				{						
					// Draw circule with a minus sign
                    using (Pen pen = new Pen(this._lineCurrentColor, 1))
                    {
                        graph.DrawEllipse(pen, buttonAbsRect.X + imageOffset - 0.5f, buttonAbsRect.Y + imageOffset - 0.5f, buttonAbsRect.Width - 2f * imageOffset, buttonAbsRect.Height - 2f * imageOffset);
                        graph.DrawLine(pen, buttonAbsRect.X + imageOffset + 1.5f, buttonAbsRect.Y + buttonAbsRect.Height / 2f - 0.5f, buttonAbsRect.Right - imageOffset - 2.5f, buttonAbsRect.Y + buttonAbsRect.Height / 2f - 0.5f);
                    }
					break;
				}
			}

			// Reset graphics transformation for button pressed mode
			if(pressedState)
			{
				graph.TranslateTransform(-pressedShifting, -pressedShifting);
			}
		}

#endregion

#region Mouse events handling for the Scroll Bar

		/// <summary>
		/// Mouse down event handler.
		/// </summary>
		internal void ScrollBar_MouseDown(object sender, System.Windows.Forms.MouseEventArgs e)
		{
			// Process left mouse button
			if(e.Button == MouseButtons.Left && this.IsVisible)
			{
				// Remember position where mouse was clicked
				_lastClickMousePosition = new PointF(e.X, e.Y);
				_lastClickViewPosition = this.axis.ScaleView.Position;

				// Check if button was pressed inside the scroll bar
				ScrollBarButtonType	buttonType;
				if(GetElementByPixelPosition(e.X, e.Y, out buttonType))
				{
					this.ButtonClicked(buttonType, e.X, e.Y);
				}
			}
		}

		/// <summary>
		/// Mouse up event handler.
		/// </summary>
		internal void ScrollBar_MouseUp(object sender, System.Windows.Forms.MouseEventArgs e)
		{
			// If scroll bar button was pressed
			if(this._pressedButtonType != int.MaxValue)
			{
				// Check if button was unpressed inside the reset zoom button
				ScrollBarButtonType	buttonType;
				if(GetElementByPixelPosition(e.X, e.Y, out buttonType))
				{
					if(buttonType == ScrollBarButtonType.ZoomReset)
					{
						this.ButtonClicked(buttonType, e.X, e.Y);
					}
				}

				// Stop scrolling timer
				_scrollTimer.Stop();
				_mouseArguments = null;

				// Clear pressed button state
				this._pressedButtonType = int.MaxValue;

				// Invalidate chart
				this.axis.Invalidate();
			}
		}

		/// <summary>
		/// Mouse move event handler.
		/// </summary>
		internal void ScrollBar_MouseMove(System.Windows.Forms.MouseEventArgs e, ref bool handled)
		{
			// If scroll bar button was pressed
			if(this._pressedButtonType != int.MaxValue)
			{
				// Mouse move event should not be handled by any other chart elements
				handled = true;

				// Check if tracking buton was pressed
				if((ScrollBarButtonType)this._pressedButtonType == ScrollBarButtonType.ThumbTracker)
				{
					// Proceed if last clicked position is known
					if(!_lastClickMousePosition.IsEmpty)
					{
						this.ButtonClicked(ScrollBarButtonType.ThumbTracker, e.X, e.Y);
					}
				}

				// Non tracking scroll bar button
				else
				{
					// Check if mouse cursor is still in the pressed button's rectangle
					bool inPressedButton = false;
					ScrollBarButtonType	buttonType;
					if(GetElementByPixelPosition(e.X, e.Y, out buttonType))
					{
						if(buttonType == (ScrollBarButtonType)this._pressedButtonType)
						{
							inPressedButton = true;
						}
					}

					// Clear pressed button state
					if(!inPressedButton)
					{
						// Stop scrolling timer
						_scrollTimer.Stop();
						_mouseArguments = null;

						// Clear pressed button state
						this._pressedButtonType = int.MaxValue;

						// Invalidate chart
						this.axis.Invalidate();
					}
				}
			}
		}

		/// <summary>
		/// Scroll bar button was clicked by the user.
		/// </summary>
		/// <param name="buttonType">Button type.</param>
		/// <param name="x">X click position in pixels.</param>
		/// <param name="y">Y click position in pixels.</param>
        [SuppressMessage("Microsoft.Mobility", "CA1601:DoNotUseTimersThatPreventPowerStateChanges", Justification = "The timer is used for simulating scrolling behavior")]
		private void ButtonClicked(ScrollBarButtonType buttonType, int x, int y)
		{
			// Call zoom reset on the second pass when button is released
			if(buttonType != ScrollBarButtonType.ZoomReset ||
				(ScrollBarButtonType)this._pressedButtonType == buttonType)
			{

				//**************************************************
				//** Fire scroll bar button clicked event
				//**************************************************
				ScrollBarEventArgs	eventArg = new ScrollBarEventArgs(this.axis, x, y, buttonType);
				this.axis.ScaleView.GetChartObject().OnAxisScrollBarClicked(eventArg);

				// Check if event was handled by user
				if(eventArg.IsHandled)
				{
					// Save type of the button pressed
					this._pressedButtonType = (int)buttonType;

					return;
				}

				//**************************************************
				//** Scroll data scaleView
				//**************************************************
				switch(buttonType)
				{
					case(ScrollBarButtonType.SmallIncrement):
						this.axis.ScaleView.Scroll(ScrollType.SmallIncrement, true);
						break;
					case(ScrollBarButtonType.SmallDecrement):
						this.axis.ScaleView.Scroll(ScrollType.SmallDecrement, true);
						break;
					case(ScrollBarButtonType.LargeIncrement):
						this.axis.ScaleView.Scroll(ScrollType.LargeIncrement, true);
						break;
					case(ScrollBarButtonType.LargeDecrement):
						this.axis.ScaleView.Scroll(ScrollType.LargeDecrement, true);
						break;
					case(ScrollBarButtonType.ZoomReset):
						this.axis.ScaleView.ZoomReset(1, true);
						break;
					case(ScrollBarButtonType.ThumbTracker):
					{
						if(!_lastClickMousePosition.IsEmpty && 
							!double.IsNaN(this._lastClickViewPosition) &&
							(_lastClickMousePosition.X != x || _lastClickMousePosition.Y != y))
						{
							// Get scroll bar client rectangle
							RectangleF	scrollBarRect = this.GetScrollBarRect();
							SizeF	borderRelativeSize = new SizeF(1, 1);
							borderRelativeSize = this.GetRelativeSize(borderRelativeSize);
							RectangleF scrollBarClientRect = new RectangleF(scrollBarRect.Location, scrollBarRect.Size);
							scrollBarClientRect.Inflate(-borderRelativeSize.Width, -borderRelativeSize.Height);

							// Check axis orientation
							bool	verticalAxis = (this.axis.AxisPosition == AxisPosition.Left || 
								this.axis.AxisPosition == AxisPosition.Right) ? true : false;

							// Get button relative size
							SizeF	buttonSize = new SizeF(scrollBarClientRect.Width, scrollBarClientRect.Height);
							buttonSize = this.GetAbsoluteSize(buttonSize);
							if(verticalAxis)
							{
								buttonSize.Height = buttonSize.Width;
							}
							else
							{
								buttonSize.Width = buttonSize.Height;
							}
							buttonSize = this.GetRelativeSize(buttonSize);

							// Calculate the distance in percentages the mouse was moved 
							// from it's original (clicked) position.
							float distance = 0f;
							double trackingAreaSize = 0f;
							if(verticalAxis)
							{
								// Calculate max tracking size
								trackingAreaSize = scrollBarClientRect.Height - this.GetButtonsNumberAll() * buttonSize.Height;
								distance = _lastClickMousePosition.Y - y;

								// Convert to relative coordinates
								distance = distance * 100F / ((float)(this.axis.Common.Height - 1));
							}
							else
							{
								trackingAreaSize = scrollBarClientRect.Width - this.GetButtonsNumberAll() * buttonSize.Width;
								distance = x - _lastClickMousePosition.X;

								// Convert to relative coordinates
								distance = distance * 100F / ((float)(this.axis.Common.Width - 1)); 
							}

							// Convert to percentages from total tracking area
							distance = (float)(distance / (trackingAreaSize / 100f));

							// Get axis scale size without margins
							double	axisScaleSize = Math.Abs(
								(this.axis.maximum - this.axis.marginView) -
								(this.axis.minimum + this.axis.marginView));

							// Calculate the same percentage using axis scale
							distance = (float)(distance * (axisScaleSize/100f));

							// Round the distance to the minimum scroll line size
							if(!double.IsNaN(axis.ScaleView.SmallScrollMinSize) && axis.ScaleView.SmallScrollMinSize != 0.0)
							{
                                double minSize = ChartHelper.GetIntervalSize(0, axis.ScaleView.SmallScrollMinSize, axis.ScaleView.SmallScrollMinSizeType);

								double rounder = (Math.Round(distance / minSize));
								distance = (float)(rounder * minSize);
							}

							// Scroll scaleView into the new position
							this.axis.ScaleView.Scroll(this._lastClickViewPosition + ((this.axis.IsReversed) ? -1 : 1) * distance, true);
						}
						break;
					}
				}

				//************************************************************
				//** Initialize timer for repeating scroll (if mouse is hold)
				//************************************************************

				// Reset mouse arguments
				_mouseArguments = null;

				if(buttonType != ScrollBarButtonType.ThumbTracker && buttonType != ScrollBarButtonType.ZoomReset)
				{
					// Remember last mouse position
					_mouseArguments = new MouseEventArgs(MouseButtons.Left, 1, x, y, 0);

					// Enable timer
					if(!_scrollTimer.Enabled)
					{
						_scrollTimer.Tick += new EventHandler(ScrollingTimerEventProcessor);
						_scrollTimer.Interval = 400;
						_scrollTimer.Start();
					}
				}
			}

			//************************************************************
			//** Invalidate chart
			//************************************************************
			
			// Save type of the button pressed
			this._pressedButtonType = (int)buttonType;

			// Invalidate
			this.axis.Invalidate();
		}

		/// <summary>
		/// This is the method to run when the timer is raised.
		/// Used to repetedly scroll data scaleView while mouse button is pressed.
		/// </summary>
		/// <param name="myObject">Object.</param>
		/// <param name="myEventArgs">Event arguments.</param>
        [SuppressMessage("Microsoft.Mobility", "CA1601:DoNotUseTimersThatPreventPowerStateChanges", Justification = "The timer is used for simulating scrolling behavior")]
		private void ScrollingTimerEventProcessor(Object myObject, EventArgs myEventArgs) 
		{
			// Simulate mouse move events
			if(_mouseArguments != null)
			{
				_scrollTimer.Interval = 200;
				this.ScrollBar_MouseDown(null, _mouseArguments);
			}
		}

		/// <summary>
		/// This method fills hot region collection with scroll bar elements.
		/// Possible elements are all scroll bar buttons and scroll bar background
		/// which performs PgUp/PgDn action.
		/// </summary>
		/// <param name="common">Common Elements</param>
		private void SetHotRegionElement( CommonElements common )
		{
			// Check if mouse button was clicked in the scroll bar
			RectangleF	scrollBarRect = this.GetScrollBarRect();

			// Get scroll bar client rectangle
			SizeF	borderRelativeSize = new SizeF(1, 1);
			borderRelativeSize = this.GetRelativeSize(borderRelativeSize);
			RectangleF scrollBarClientRect = new RectangleF(scrollBarRect.Location, scrollBarRect.Size);
			scrollBarClientRect.Inflate(-borderRelativeSize.Width, -borderRelativeSize.Height);
			
			ChartElementType buttonType = ChartElementType.Nothing;

			// Fill collection with scroll buttons rectangles.
			foreach(object type in Enum.GetValues(typeof(ScrollBarButtonType)))
			{

				// Convert Scroll Bar Button type enum to Chart Element AxisName enum.
				switch( (ScrollBarButtonType)type )
				{
					case ScrollBarButtonType.SmallIncrement:
						buttonType = ChartElementType.ScrollBarSmallIncrement;
						break;
					case ScrollBarButtonType.LargeIncrement:
						buttonType = ChartElementType.ScrollBarLargeIncrement;
						break;
					case ScrollBarButtonType.LargeDecrement:
						buttonType = ChartElementType.ScrollBarLargeDecrement;
						break;
					case ScrollBarButtonType.ThumbTracker:
						buttonType = ChartElementType.ScrollBarThumbTracker;
						break;
					case ScrollBarButtonType.SmallDecrement:
						buttonType = ChartElementType.ScrollBarSmallDecrement;
						break;
					case ScrollBarButtonType.ZoomReset:
						buttonType = ChartElementType.ScrollBarZoomReset;
						break;
				}

				// Get button rectangle
				RectangleF buttonRect = this.GetScrollBarButtonRect(scrollBarClientRect, (ScrollBarButtonType)type);

				common.HotRegionsList.AddHotRegion( buttonRect, this, buttonType, true );
				
			}
		}

		/// <summary>
		/// Detects the scroll bar elements by pixel position.
		/// Possible elements are all scroll bar buttons and scroll bar background
		/// which performs PgUp/PgDn action.
		/// </summary>
		/// <param name="x">X coordinate in pixels.</param>
		/// <param name="y">Y coordinate in pixels.</param>
		/// <param name="buttonType">Return button type.</param>
		/// <returns>True if position is in the scroll bar.</returns>
		private bool GetElementByPixelPosition(float x, float y, out ScrollBarButtonType buttonType)
		{
			// Set initial values 
			buttonType = ScrollBarButtonType.ThumbTracker;

			// Convert mouse click coordinates to relative
			PointF	position = new PointF(x, y);
			position.X = x * 100F / ((float)(this.axis.Common.Width - 1)); 
			position.Y = y * 100F / ((float)(this.axis.Common.Height - 1)); 

			// Check if mouse button was clicked in the scroll bar
			RectangleF	scrollBarRect = this.GetScrollBarRect();
			if(scrollBarRect.Contains(position))
			{
				// Get scroll bar client rectangle
				SizeF	borderRelativeSize = new SizeF(1, 1);
				borderRelativeSize = this.GetRelativeSize(borderRelativeSize);
				RectangleF scrollBarClientRect = new RectangleF(scrollBarRect.Location, scrollBarRect.Size);
				scrollBarClientRect.Inflate(-borderRelativeSize.Width, -borderRelativeSize.Height);

				//******************************************************************
				//** Check if scroll bar button was clicked
				//******************************************************************
				foreach(object type in Enum.GetValues(typeof(ScrollBarButtonType)))
				{
					// Get button rectangle
					RectangleF buttonRect = this.GetScrollBarButtonRect(scrollBarClientRect, (ScrollBarButtonType)type);

					// Check if position is inside the button
					if(buttonRect.Contains(position))
					{
						buttonType = (ScrollBarButtonType)type;
						return true;
					}
				}
			}

			// Pixel position is outside scroll bar area
			return false;
		}

#endregion

#region Scroll bar helper methods

		/// <summary>
		/// Returns scroll bar button rectangle position in relative coordinates.
		/// </summary>
		/// <param name="scrollBarClientRect">Scroll bar client rectangle.</param>
		/// <param name="buttonType">Scroll bar button type.</param>
		/// <returns>Scroll bar position.</returns>
		internal RectangleF GetScrollBarButtonRect(RectangleF scrollBarClientRect, ScrollBarButtonType buttonType)
		{
			// Initialize button rectangle
			RectangleF	buttonRect = new RectangleF(scrollBarClientRect.Location, scrollBarClientRect.Size);

			// Check axis orientation
			bool	verticalAxis = (this.axis.AxisPosition == AxisPosition.Left || 
				this.axis.AxisPosition == AxisPosition.Right) ? true : false;

			// Get relative size of 1 pixel
			SizeF	pixelRelativeSize = new SizeF(1, 1);
			pixelRelativeSize = this.GetRelativeSize(pixelRelativeSize);

			// Get button relative size
			SizeF	buttonSize = new SizeF(scrollBarClientRect.Width, scrollBarClientRect.Height);
			buttonSize = this.GetAbsoluteSize(buttonSize);
			if(verticalAxis)
			{
				buttonSize.Height = buttonSize.Width;
			}
			else
			{
				buttonSize.Width = buttonSize.Height;
			}
			buttonSize = this.GetRelativeSize(buttonSize);

			// Set common position sizes
			buttonRect.Width = buttonSize.Width;
			buttonRect.Height = buttonSize.Height;
			if(verticalAxis)
			{
				buttonRect.X = scrollBarClientRect.X;
			}
			else
			{
				buttonRect.Y = scrollBarClientRect.Y;
			}

			// Calculate scroll bar buttons position
			switch(buttonType)
			{
				case(ScrollBarButtonType.LargeDecrement):
				case(ScrollBarButtonType.LargeIncrement):
				case(ScrollBarButtonType.ThumbTracker):
				{
					// Get tracker button position and size first
					if(verticalAxis)
					{
						// Calculate tracker size
						double trackingAreaSize = scrollBarClientRect.Height - this.GetButtonsNumberAll() * buttonSize.Height;
						buttonRect.Height = (float)(this.GetDataViewPercentage() * (trackingAreaSize / 100f));

						// Check if tracker size is too small
						if(buttonRect.Height < pixelRelativeSize.Height * 6f)
						{
							buttonRect.Height = pixelRelativeSize.Height * 6f;
						}

						// Calculate tracker position
						if(!this.axis.IsReversed)
						{
							buttonRect.Y = scrollBarClientRect.Bottom - this.GetButtonsNumberBottom()*buttonSize.Height - buttonRect.Height;
							buttonRect.Y -=  (float)(this.GetDataViewPositionPercentage() * (trackingAreaSize / 100f));
							if(buttonRect.Y < scrollBarClientRect.Y + this.GetButtonsNumberTop()*buttonSize.Height + ((this.GetButtonsNumberTop() == 0) ? 0 : pixelRelativeSize.Height))
							{
								buttonRect.Y = scrollBarClientRect.Y + this.GetButtonsNumberTop()*buttonSize.Height + ((this.GetButtonsNumberTop() == 0) ? 0 : pixelRelativeSize.Height);
							}
						}
						else
						{
							buttonRect.Y = scrollBarClientRect.Top + this.GetButtonsNumberTop()*buttonSize.Height;
							buttonRect.Y +=  (float)(this.GetDataViewPositionPercentage() * (trackingAreaSize / 100f));
							if((buttonRect.Y + buttonRect.Height) > scrollBarClientRect.Bottom - this.GetButtonsNumberBottom()*buttonSize.Height - ((this.GetButtonsNumberBottom() == 0) ? 0 : pixelRelativeSize.Height))
							{
								buttonRect.Y = (scrollBarClientRect.Bottom - this.GetButtonsNumberBottom()*buttonSize.Height) - buttonRect.Height - ((this.GetButtonsNumberBottom() == 0) ? 0 : pixelRelativeSize.Height);
							}
						}
					}
					else
					{
						// Calculate tracker size
						double trackingAreaSize = scrollBarClientRect.Width - this.GetButtonsNumberAll() * buttonSize.Width;
						buttonRect.Width = (float)(this.GetDataViewPercentage() * (trackingAreaSize / 100f));

						// Check if tracker size is too small
						if(buttonRect.Width < pixelRelativeSize.Width * 6f)
						{
							buttonRect.Width = pixelRelativeSize.Width * 6f;
						}

						// Calculate tracker position
						if(!this.axis.IsReversed)
						{
							buttonRect.X = scrollBarClientRect.X + this.GetButtonsNumberTop() * buttonSize.Width;
							buttonRect.X +=  (float)(this.GetDataViewPositionPercentage() * (trackingAreaSize / 100f));
							if((buttonRect.X + buttonRect.Width) > scrollBarClientRect.Right - this.GetButtonsNumberBottom()*buttonSize.Width - ((this.GetButtonsNumberBottom() == 0) ? 0 : pixelRelativeSize.Width))
							{
								buttonRect.X = (scrollBarClientRect.Right - buttonRect.Width) - this.GetButtonsNumberBottom()*buttonSize.Width - ((this.GetButtonsNumberBottom() == 0) ? 0 : pixelRelativeSize.Width);
							}
						}
						else
						{
							buttonRect.X = scrollBarClientRect.Right - this.GetButtonsNumberBottom()*buttonSize.Width - ((this.GetButtonsNumberBottom() == 0) ? 0 : pixelRelativeSize.Width) - buttonRect.Width;
							buttonRect.X -=  (float)(this.GetDataViewPositionPercentage() * (trackingAreaSize / 100f));
							if(buttonRect.X < scrollBarClientRect.X + this.GetButtonsNumberTop()*buttonSize.Width)
							{
								buttonRect.X = scrollBarClientRect.X + this.GetButtonsNumberTop()*buttonSize.Width;
							}
						}

					}

					// Get page up region rectangle depending on the tracker position
					if(buttonType == ScrollBarButtonType.LargeDecrement)
					{
						if(verticalAxis)
						{
							buttonRect.Y = buttonRect.Bottom + pixelRelativeSize.Height;
							buttonRect.Height = (scrollBarClientRect.Bottom - this.GetButtonsNumberBottom()*buttonSize.Height - pixelRelativeSize.Height) - buttonRect.Y;
						}
						else
						{
							float x = scrollBarClientRect.X + 
								this.GetButtonsNumberTop() * buttonSize.Width + 
								pixelRelativeSize.Width;

							buttonRect.Width = buttonRect.X - x;
							buttonRect.X = x;
						}
					}

					// Get page down region rectangle depending on the tracker position
					else if(buttonType == ScrollBarButtonType.LargeIncrement)
					{
						if(verticalAxis)
						{
							float y = scrollBarClientRect.Y + 
								this.GetButtonsNumberTop() * buttonSize.Height + 
								pixelRelativeSize.Height;

							buttonRect.Height = buttonRect.Y - y;
							buttonRect.Y = y;
						}
						else
						{
							buttonRect.X = buttonRect.Right + pixelRelativeSize.Width;
							buttonRect.Width = (scrollBarClientRect.Right - this.GetButtonsNumberBottom()*buttonSize.Width - pixelRelativeSize.Height) - buttonRect.X;
						}
					}

					break;
				}

				case(ScrollBarButtonType.SmallDecrement):
					if(this._scrollBarButtonStyle == ScrollBarButtonStyles.All ||
						this._scrollBarButtonStyle == ScrollBarButtonStyles.SmallScroll)
					{
						if(verticalAxis)
						{
							buttonRect.Y = scrollBarClientRect.Bottom - buttonRect.Height;
						}
						else
						{
							buttonRect.X = scrollBarClientRect.X + (this.GetButtonsNumberTop()-1f)*buttonSize.Width;
							buttonRect.X += (this.GetButtonsNumberTop() == 1) ? 0 : pixelRelativeSize.Width;
						}
					}
					else
					{
						buttonRect = RectangleF.Empty;
					}
					break;

				case(ScrollBarButtonType.SmallIncrement):
					if(this._scrollBarButtonStyle == ScrollBarButtonStyles.All ||
						this._scrollBarButtonStyle == ScrollBarButtonStyles.SmallScroll)
					{
						if(verticalAxis)
						{
							buttonRect.Y = scrollBarClientRect.Y + (this.GetButtonsNumberTop()-1f) * buttonSize.Height;
							buttonRect.Y += (this.GetButtonsNumberTop() == 1) ? 0 : pixelRelativeSize.Height;
						}
						else
						{
							buttonRect.X = scrollBarClientRect.Right - buttonRect.Width;
						}
					}
					else
					{
						buttonRect = RectangleF.Empty;
					}
					break;

				case(ScrollBarButtonType.ZoomReset):
					if(this._scrollBarButtonStyle == ScrollBarButtonStyles.All ||
						this._scrollBarButtonStyle == ScrollBarButtonStyles.ResetZoom)
					{
						if(verticalAxis)
						{
							buttonRect.Y = scrollBarClientRect.Y;
						}
						else
						{
							buttonRect.X = scrollBarClientRect.X;
						}
					}
					else
					{
						buttonRect = RectangleF.Empty;
					}
					break;
			}

			return buttonRect;
		}

		/// <summary>
		/// Returns scroll bar rectangle position in relative coordinates.
		/// </summary>
		/// <returns>Scroll bar position.</returns>
		internal RectangleF GetScrollBarRect()
		{
			// Get scroll bar relative size
			float	scrollBarSize = (float)this.GetScrollBarRelativeSize();

			// Get relative size of the axis line (Note: Code removed for now. -- AG)
			//SizeF axisLineSize = new SizeF(axis.LineWidth, axis.LineWidth);
			//axisLineSize.Width =  axisLineSize.Width * 100F / ((float)(this.axis.Common.Width - 1)); 
			//axisLineSize.Height = axisLineSize.Height * 100F / ((float)(this.axis.Common.Height - 1)); 

			// Check if scroll bar is positioned next to PlotArea or ChartArea
			RectangleF	areaPosition = axis.PlotAreaPosition.ToRectangleF();
			if(!this.IsPositionedInside)
			{
				areaPosition = axis.ChartArea.Position.ToRectangleF();

				// Reduce rectangle size by scroll bar size
				foreach(Axis a in this.ChartArea.Axes)
				{
					if(a.ScrollBar.IsVisible && !a.ScrollBar.IsPositionedInside)
					{
						float	size = (float)a.ScrollBar.GetScrollBarRelativeSize();
						switch( a.AxisPosition )
						{
							case AxisPosition.Left:
								areaPosition.X += size;
								areaPosition.Width -= size;
								break;
							case AxisPosition.Right:
								areaPosition.Width -= size;
								break;
							case AxisPosition.Bottom:
								areaPosition.Height -= size;
								break;
							case AxisPosition.Top:
								areaPosition.Y += size;
								areaPosition.Height -= size;
								break;
						}
					}
				}
			}

			// Get bar position depending on the axis type
			RectangleF	barPosition = RectangleF.Empty;
			if(this.axis.PlotAreaPosition != null)
			{
				switch( axis.AxisPosition )
				{
					case AxisPosition.Left:
						barPosition.Y = areaPosition.Y;
						barPosition.Height = areaPosition.Height;
						barPosition.X = 
							( (this.IsPositionedInside) ? (float)(axis.GetAxisPosition(true)) : areaPosition.X) - scrollBarSize;// - axisLineSize.Width / 2f;
						barPosition.Width = scrollBarSize;
						break;
					case AxisPosition.Right:
						barPosition.Y = areaPosition.Y;
						barPosition.Height = areaPosition.Height;
						barPosition.X = 
							(this.IsPositionedInside) ? (float)axis.GetAxisPosition(true) : areaPosition.Right;// + axisLineSize.Width / 2f;
						barPosition.Width = scrollBarSize;
						break;
					case AxisPosition.Bottom:
						barPosition.X = areaPosition.X;
						barPosition.Width = areaPosition.Width;
						barPosition.Y = 
							(this.IsPositionedInside) ? (float)axis.GetAxisPosition(true) : areaPosition.Bottom;// + axisLineSize.Height / 2f;
						barPosition.Height = scrollBarSize;
						break;
					case AxisPosition.Top:
						barPosition.X = areaPosition.X;
						barPosition.Width = areaPosition.Width;
						barPosition.Y = 
							( (this.IsPositionedInside) ? (float)axis.GetAxisPosition(true) : areaPosition.Y) - scrollBarSize;// - axisLineSize.Height / 2f;
						barPosition.Height = scrollBarSize;
						break;
				}
			}
		
			return barPosition;
		}

		/// <summary>
		/// Internal helper method which returns the relative scroll bar size.
		/// </summary>
		/// <returns>Relative scroll bar size.</returns>
		internal double GetScrollBarRelativeSize()
		{
			// Scroll bar is not shown in 3D
			if(this.axis.ChartArea.Area3DStyle.Enable3D || this.axis.ChartArea.chartAreaIsCurcular)
			{
				return 0.0;
            }

#if SUBAXES
			// Scrollbar not supported on sub axis
			if( this.axis != null &&  this.axis.IsSubAxis)
			{
				return 0.0;
			}
#endif //SUBAXES


            // Get scroll bar relative size depending on the axis location
			if(this.axis.AxisPosition == AxisPosition.Left || this.axis.AxisPosition == AxisPosition.Right)
			{
				return this._scrollBarSize * 100F / ((float)(this.axis.Common.Width - 1)); 
			}
			else
			{
				return this._scrollBarSize * 100F / ((float)(this.axis.Common.Height - 1)); 
			}
		}

		/// <summary>
		/// Returns the percentage size (0-100%) of the data scaleView comparing to 
		/// the axis scale minimum and maximum values.
		/// </summary>
		/// <returns>Size of the data scaleView in percentage.</returns>
		private double GetDataViewPercentage()
		{
			double	viewPercentage = 100.0;

			// Check if axis data scaleView properties are set
			if(this.axis != null &&
				!double.IsNaN(this.axis.ScaleView.Position) &&
				!double.IsNaN(this.axis.ScaleView.Size))
			{
				// Get data scaleView size 
                double dataViewSize = ChartHelper.GetIntervalSize(
					this.axis.ScaleView.Position,
					this.axis.ScaleView.Size,
					this.axis.ScaleView.SizeType);

				// Get axis scale size without margins
				double	minimum = this.axis.minimum + this.axis.marginView;
				double	maximum = this.axis.maximum - this.axis.marginView;
				if(this.axis.ScaleView.Position < minimum)
				{
					minimum = this.axis.ScaleView.Position;
				}
				if((this.axis.ScaleView.Position + dataViewSize) > maximum)
				{
					maximum = this.axis.ScaleView.Position + dataViewSize;
				}
				double	axisScaleSize = Math.Abs(minimum - maximum);

				// Check if data scaleView is smaller than axis scale and if it is find the pecentage
				if(dataViewSize < axisScaleSize)
				{
					viewPercentage = dataViewSize / (axisScaleSize / 100.0);
				}
			}

			return viewPercentage;
		}

		/// <summary>
		/// Returns the the data scaleView position in percentage (0-100%) using 
		/// the axis scale minimum and maximum values.
		/// </summary>
		/// <returns>Data scaleView position in percentage.</returns>
		private double GetDataViewPositionPercentage()
		{
			double	viewPosition = 0.0;

			// Check if axis data scaleView properties are set
			if(this.axis != null &&
				!double.IsNaN(this.axis.ScaleView.Position) &&
				!double.IsNaN(this.axis.ScaleView.Size))
			{
				// Get data scaleView size 
                double dataViewSize = ChartHelper.GetIntervalSize(
					this.axis.ScaleView.Position,
					this.axis.ScaleView.Size,
					this.axis.ScaleView.SizeType);

				// Get axis scale size without margins
				double	minimum = this.axis.minimum + this.axis.marginView;
				double	maximum = this.axis.maximum - this.axis.marginView;
				if(this.axis.ScaleView.Position < minimum)
				{
					minimum = this.axis.ScaleView.Position;
				}
				if((this.axis.ScaleView.Position + dataViewSize) > maximum)
				{
					maximum = this.axis.ScaleView.Position + dataViewSize;
				}
				double	axisScaleSize = Math.Abs(minimum - maximum);

				// Calculate data scaleView position in percentage
				viewPosition = (this.axis.ScaleView.Position - (minimum)) / (axisScaleSize / 100.0);
			}

			return viewPosition;
		}

		/// <summary>
		/// Get total number of buttons in the scroll bar (except tracker).
		/// </summary>
		/// <returns>Number of buttons.</returns>
		private int GetButtonsNumberAll()
		{
			int buttonNumber = 0;
			if((this._scrollBarButtonStyle & ScrollBarButtonStyles.ResetZoom) == ScrollBarButtonStyles.ResetZoom)
			{
				buttonNumber += 1;
			}
			if((this._scrollBarButtonStyle & ScrollBarButtonStyles.SmallScroll) == ScrollBarButtonStyles.SmallScroll)
			{
				buttonNumber += 2;
			}

			return buttonNumber;
		}

		/// <summary>
		/// Get number of buttons in the top (left) part of the scroll bar.
		/// </summary>
		/// <returns>Number of buttons.</returns>
		private int GetButtonsNumberTop()
		{
			int buttonNumber = 0;
			if((this._scrollBarButtonStyle & ScrollBarButtonStyles.ResetZoom) == ScrollBarButtonStyles.ResetZoom)
			{
				buttonNumber += 1;
			}
			if((this._scrollBarButtonStyle & ScrollBarButtonStyles.SmallScroll) == ScrollBarButtonStyles.SmallScroll)
			{
				buttonNumber += 1;
			}

			return buttonNumber;
		}

		/// <summary>
		/// Get number of buttons in the bottom (right) part of the scroll bar.
		/// </summary>
		/// <returns>Number of buttons.</returns>
		private int GetButtonsNumberBottom()
		{
			int buttonNumber = 0;
			if((this._scrollBarButtonStyle & ScrollBarButtonStyles.SmallScroll) == ScrollBarButtonStyles.SmallScroll)
			{
				buttonNumber += 1;
			}

			return buttonNumber;
		}

#endregion

#region Coordinate convertion methods

		/// <summary>
		/// Converts Relative size to Absolute size
		/// </summary>
		/// <param name="relative">Relative size in %</param>
		/// <returns>Absolute size</returns>
		internal SizeF GetAbsoluteSize( SizeF relative )
		{
			SizeF absolute = SizeF.Empty;

			// Convert relative coordinates to absolute coordinates
			absolute.Width = relative.Width * (this.axis.Common.Width - 1) / 100F; 
			absolute.Height = relative.Height * (this.axis.Common.Height - 1) / 100F; 
			
			// Return Absolute coordinates
			return absolute;
		}

		/// <summary>
		/// Converts Absolute size to Relative size
		/// </summary>
		/// <param name="size">Absolute size</param>
		/// <returns>Relative size</returns>
		internal SizeF GetRelativeSize( SizeF size )
		{
			SizeF relative = SizeF.Empty;

			// Convert absolute coordinates to relative coordinates
			relative.Width = size.Width * 100F / ((float)(this.axis.Common.Width - 1)); 
			relative.Height = size.Height * 100F / ((float)(this.axis.Common.Height - 1)); 
			
			// Return relative coordinates
			return relative;
		}

#endregion

#region IDisposable Members

        /// <summary>
        /// Releases unmanaged and - optionally - managed resources
        /// </summary>
        /// <param name="disposing"><c>true</c> to release both managed and unmanaged resources; <c>false</c> to release only unmanaged resources.</param>
        protected virtual void Dispose(bool disposing)
        {
            if (disposing)
            {
                // Dispose managed resources
                if (this._scrollTimer != null)
                {
                    this._scrollTimer.Dispose();
                    this._scrollTimer = null;
                }
            }
        }

        /// <summary>
        /// Performs application-defined tasks associated with freeing, releasing, or resetting unmanaged resources.
        /// </summary>
        public void Dispose()
        {
            Dispose(true);
            GC.SuppressFinalize(this);
        }

        #endregion
    }

	/// <summary>
	/// The arguments for a scrollbar event.
	/// </summary>
    public class ScrollBarEventArgs : EventArgs
	{
#region Private fields

		// Private fields for properties values storage
		private		Axis					_axis = null;
		private		bool					_isHandled = false;
		private		int						_mousePositionX = 0;
		private		int						_mousePositionY = 0;
		private		ScrollBarButtonType		_buttonType = ScrollBarButtonType.ThumbTracker;

#endregion

#region Constructors

		/// <summary>
		/// ScrollBarEventArgs constructor.
		/// </summary>
		/// <param name="axis">Axis containing the scrollbar.</param>
		/// <param name="x">X position of mouse cursor.</param>
		/// <param name="y">Y position of mouse cursor.</param>
		/// <param name="buttonType">Button type of the button clicked.</param>
        [SuppressMessage("Microsoft.Naming", "CA1704:IdentifiersShouldBeSpelledCorrectly",
            Justification = "X and Y are cartesian coordinates and well understood")]
		public ScrollBarEventArgs(Axis axis, int x, int y, ScrollBarButtonType buttonType)
		{
			this._axis = axis;
			this._mousePositionX = x;
			this._mousePositionY = y;
			this._buttonType = buttonType;
		}

#endregion

#region Properties

		/// <summary>
		/// Axis containing the scrollbar of the event.
		/// </summary>
		[
		SRDescription("DescriptionAttributeAxis"),
		]
		public Axis Axis
		{
			get
			{
				return _axis;
			}
		}

		/// <summary>
		/// ChartArea containing the scrollbar of the event.
		/// </summary>
		[
		SRDescription("DescriptionAttributeChartArea"),
		]
		public ChartArea ChartArea
		{
			get
			{
				return _axis.ChartArea;
			}
		}

		/// <summary>
		/// Button type of the scrollbar button clicked.
		/// </summary>
		[
		SRDescription("DescriptionAttributeScrollBarEventArgs_ButtonType"),
		]
        public ScrollBarButtonType ButtonType
		{
			get
			{
				return _buttonType;
			}
		}
		
		/// <summary>
		/// Indicates if the event is handled by the user and no further processing is required.
		/// </summary>
		[
		SRDescription("DescriptionAttributeScrollBarEventArgs_Handled"),
		]
		public bool IsHandled
		{
			get
			{
				return _isHandled;
			}
			set
			{
				_isHandled = value;
			}
		}

		/// <summary>
		/// X position of mouse cursor.
		/// </summary>
		[
		SRDescription("DescriptionAttributeScrollBarEventArgs_MousePositionX"),
		]
		public int MousePositionX
		{
			get
			{
				return _mousePositionX;
			}
		}

		/// <summary>
		/// Y position of mouse cursor.
		/// </summary>
		[
		SRDescription("DescriptionAttributeScrollBarEventArgs_MousePositionY"),
		]
		public int MousePositionY
		{
			get
			{
				return _mousePositionY;
			}
		}

#endregion
	}
}

#endif	// #if WINFORMS_CONTROL