/*/////////////////////////////////////////////////////////////////////////////////////////
 * 
 * This code is provided as is and without any warranties.
 * 
 * You can use the content of this file as you wish. Feel free to re use it
 * and embed it in your applications, modify it and re-distribute it.
 * 
 * In return I only ask you that if you use this code, you make the source of it
 * available to the public. This of course means only the part of your application
 * that directly uses my code.
 * 
 * Of course I appreciate being given the credit if you use this code in your
 * applications, but this isn't necessary.
 * 
 * Arya
 * arya@arya.distanthost.com
 * http://arya.distanthost.com/
 * 
 *///////////////////////////////////////////////////////////////////////////////////////////
using System;
using System.Drawing;

namespace TheBox.MapViewer.DrawObjects
{
	#region IMapDrawable

	/// <summary>
	/// The interface that must be implemented by any draw object used on a MapViewer
	/// </summary>
	public interface IMapDrawable
	{
		/// <summary>
		/// Evaluates the visibility of the object on the portion of the map currently displayed
		/// </summary>
		/// <param name="bounds">The bounds of the current map view</param>
		/// <param name="map">The current map</param>
		/// <returns></returns>
		bool IsVisible( Rectangle bounds, Maps map );

		/// <summary>
		/// Draws a draw object on the map viewer
		/// </summary>
		/// <param name="g">The graphics object on which the drawing happens</param>
		/// <param name="ViewInfo">Information about the map view currently used on the control</param>
		void Draw( Graphics g, MapViewInfo ViewInfo );
	}

	#endregion

	#region MapRectangle

	/// <summary>
	/// A rectangle displayed on the map
	/// </summary>
	public class MapRectangle : IMapDrawable
	{
		/// <summary>
		/// The rectangle coordinates (on the map)
		/// </summary>
		private Rectangle m_Location;
		/// <summary>
		/// The map on which the object is drawn
		/// </summary>
		private Maps m_Map;
		/// <summary>
		/// The color for the rectangle border
		/// </summary>
		private Color m_Color;
		/// <summary>
		/// The color for the fill of the rectangle
		/// </summary>
		private Color m_FillColor;
		/// <summary>
		/// States whether to fill the rectangle or not
		/// </summary>
		private bool m_Fill;

		/// <summary>
		/// The rectangle coordinates (in map units)
		/// </summary>
		public Rectangle Rectangle
		{
			get
			{
				return m_Location;
			}
			set
			{
				m_Location = value;
			}
		}

		/// <summary>
		/// Gets or sets the color of the border
		/// </summary>
		public Color Color
		{
			get
			{
				return m_Color;
			}
			set
			{
				m_Color = value;
			}
		}

		/// <summary>
		/// Gets or sets the color of the fill
		/// </summary>
		public Color FillColor
		{
			get
			{
				return m_FillColor;
			}
			set
			{
				m_FillColor = value;
			}
		}
		
		/// <summary>
		/// Creates a new Rectangle object that can be drawn on the mapviewer and that is filled inside
		/// </summary>
		/// <param name="location">The rectangle in map coordinates</param>
		/// <param name="map"></param>
		/// <param name="color">The color for the border of the rectangle</param>
		/// <param name="fillColor">The color for the fill of the rectangle</param>
		public MapRectangle( Rectangle location, Maps map, Color color, Color fillColor )
		{
			m_Location = location;
			m_Color = color;
			m_FillColor = fillColor;
			m_Fill = true;
			m_Map = map;
		}

		/// <summary>
		/// Creates a non-filled rectangle that can be drawn on the map viewer
		/// </summary>
		/// <param name="location">The rectangle in map coordinates</param>
		/// <param name="map">The map on which this object is drawn</param>
		/// <param name="color">The color for the border</param>
		public MapRectangle( Rectangle location, Maps map, Color color )
		{
			m_Location = location;
			m_Color = color;
			m_Fill = false;
			m_Map = map;
		}

		#region IMapDrawable Members

		/// <summary>
		/// Calculates whether the rectangle is visible on the given map portion
		/// </summary>
		/// <param name="bounds">A rectangle object describing the bounds of the map portion currently displayed</param>
		/// <param name="map">The map on which the rectangle is drawn</param>
		/// <returns>True if the object is visible on the map porion or not</returns>
		public bool IsVisible(Rectangle bounds, Maps map)
		{
			if ( ( m_Map != map ) && ( m_Map != Maps.AllMaps ) )
				return false;

			if ( 
				( m_Location.Left > bounds.Right ) ||
				( m_Location.Right < bounds.Left ) ||
				( m_Location.Top > bounds.Bottom ) ||
				( m_Location.Bottom < bounds.Top ) )
				return false;
			else
				return true;
		}

		/// <summary>
		/// Draws the rectangle on the provided Graphics
		/// </summary>
		/// <param name="g">The graphics on which the drawing happens</param>
		/// <param name="ViewInfo">Information about the current map view</param>
		public void Draw(Graphics g, MapViewInfo ViewInfo )
		{
			Point p1 = ViewInfo.MapToControl( new Point( m_Location.X, m_Location.Y ) );
			Point p2 = ViewInfo.MapToControl( new Point( m_Location.Right, m_Location.Bottom ) );

			Brush borderBrush = new SolidBrush( m_Color );
			Pen borderPen = new Pen( borderBrush );

			g.DrawRectangle( borderPen, p1.X, p1.Y, p2.X - p1.X, p2.Y - p1.Y );

			if ( m_Fill )
			{
				Brush fillBrush = new SolidBrush( m_FillColor );

				g.FillRectangle( fillBrush, p1.X, p1.Y, p2.X - p1.X, p2.Y - p1.Y );
			}
		}

		#endregion
	}

	#endregion

	#region MapCross

	/// <summary>
	/// A cross displayed either at a given location or at the center of the screen
	/// </summary>
	public class MapCross : IMapDrawable
	{
		/// <summary>
		/// The map coordinates at which the cross is drawn
		/// </summary>
		private Point m_Location;

		/// <summary>
		/// The color that the cross should use
		/// </summary>
		private Color m_Color;

		/// <summary>
		/// The map on which the object is drawn
		/// </summary>
		private Maps m_Map;

		/// <summary>
		/// The length of a segment composing the cross in pixels
		/// </summary>
		private int m_Length;

		/// <summary>
		/// The color of the cross
		/// </summary>
		public Color Color
		{
			get
			{
				return m_Color;
			}
			set
			{
				m_Color = value;
			}
		}

		/// <summary>
		/// The length of each segment composing the cross ( in pixels )
		/// </summary>
		public int Length
		{
			get
			{
				return m_Length;
			}
			set
			{
				m_Length = value;
			}
		}

		/// <summary>
		/// The point at which the cross is drawn
		/// </summary>
		public Point Location
		{
			get
			{
				return m_Location;
			}
			set
			{
				m_Location = value;
			}
		}

		/// <summary>
		/// Creates a cross that is displayed at a given location on a given map
		/// </summary>
		/// <param name="segmentLength">The length of each cross segment</param>
		/// <param name="color">The color of the cross</param>
		/// <param name="location">The location of the cross</param>
		/// <param name="map">The map on which the cross lies on</param>
		public MapCross( int segmentLength, Color color, Point location, Maps map )
		{
			m_Length = segmentLength;
			m_Color = color;
			m_Location = location;
			m_Map = map;
		}

		#region IMapDrawable Members

		/// <summary>
		/// Evaluates whether the cross is visible on the given view
		/// </summary>
		/// <param name="bounds">The bounds of the map view (in map coordinates)</param>
		/// <param name="map">The map displayed</param>
		/// <returns>True is the cross is visible, false otherwise</returns>
		public bool IsVisible(Rectangle bounds, Maps map)
		{
			if ( ( m_Map != map ) && ( m_Map != Maps.AllMaps ) )
				return false;

			if ( 
				( m_Location.X > bounds.Left ) &&
				( m_Location.X < bounds.Right ) &&
				( m_Location.Y > bounds.Top ) &&
				( m_Location.Y < bounds.Bottom ) )
				return true;

			return false;
		}

		/// <summary>
		/// Draws the rectangle on the provided Graphics
		/// </summary>
		/// <param name="g">The graphics on which the drawing happens</param>
		/// <param name="ViewInfo">Information about the current map view</param>
		public void Draw(Graphics g, MapViewInfo ViewInfo)
		{
			Point p = ViewInfo.MapToControl( m_Location );

			int x = p.X;
			int y = p.Y;

			Brush brush = new SolidBrush( m_Color );
			Pen pen = new Pen( brush );

			g.DrawLine( pen, x - m_Length, y, x + m_Length, y );
			g.DrawLine( pen, x, y - m_Length, x, y + m_Length );
		}

		#endregion

	}

	#endregion

	#region MapCircle

	/// <summary>
	/// A circle displayed ont he map
	/// </summary>
	public class MapCircle : IMapDrawable
	{
		/// <summary>
		/// The map on which the circle is drawn
		/// </summary>
		private Maps m_Map;
		/// <summary>
		/// The location at which the circle is drawn
		/// </summary>
		private Point m_Location;
		/// <summary>
		/// The radius of the circle
		/// </summary>
		private int m_Radius;
		/// <summary>
		/// The color of the border
		/// </summary>
		private Color m_Color;
		/// <summary>
		/// The color of the fill
		/// </summary>
		private Color m_FillColor;
		/// <summary>
		/// States whether the circle should be filled or not
		/// </summary>
		private bool m_Fill;

		/// <summary>
		/// The location of the center of the circle
		/// </summary>
		public Point Location
		{
			get
			{
				return m_Location;
			}
			set
			{
				m_Location = value;
			}
		}

		/// <summary>
		/// The radius of the circle in map units
		/// </summary>
		public int Radius
		{
			get
			{
				return m_Radius;
			}
			set
			{
				m_Radius = value;
			}
		}

		/// <summary>
		/// Gets or sets the color for circle border
		/// </summary>
		public Color Color
		{
			get
			{
				return m_Color;
			}
			set
			{
				m_Color = value;
			}
		}

		/// <summary>
		/// Gets or sets the fill color of the circle
		/// </summary>
		public Color FillColor
		{
			get
			{
				return m_FillColor;
			}
			set
			{
				m_FillColor = value;
			}
		}

		/// <summary>
		/// Creates a MapCircle object at a given location, without any fill
		/// </summary>
		/// <param name="radius">The radius of the circle</param>
		/// <param name="location">The location at which the circle is displayed</param>
		/// <param name="map">The map on which the circle is displayed</param>
		/// <param name="color">The color of the border</param>
		public MapCircle( int radius, Point location, Maps map, Color color )
		{
			m_Radius = radius;
			m_Map = map;
			m_Location = location;
			m_Color = color;
			m_Fill = false;
		}

		/// <summary>
		/// Creates a MapCircle object at a given location, filled inside
		/// </summary>
		/// <param name="radius">The radius of the circle</param>
		/// <param name="location">The location at which the circle is displayed</param>
		/// <param name="map">The map on which the circle is displayed</param>
		/// <param name="color">The color of the border</param>
		/// <param name="fillColor">The color of the fill</param>
		public MapCircle( int radius, Point location, Maps map, Color color, Color fillColor )
		{
			m_Radius = radius;
			m_Map = map;
			m_Location = location;
			m_Color = color;
			m_FillColor = fillColor;
			m_Fill = true;
		}

		#region IMapDrawable Members

		/// <summary>
		/// Decided whether the circle is visible on the specified map view
		/// </summary>
		/// <param name="bounds">The bounds of the map portion currently displayed</param>
		/// <param name="map">The map currently displayed</param>
		/// <returns>True if the circle is visible, false otherwise</returns>
		public bool IsVisible(Rectangle bounds, Maps map)
		{
			if ( ( m_Map != map ) && ( m_Map != Maps.AllMaps ) )
				return false;

			if ( 
				( m_Location.X - m_Radius > bounds.Right ) ||
				( m_Location.X + m_Radius < bounds.Left ) ||
				( m_Location.Y - m_Radius > bounds.Bottom ) ||
				( m_Location.Y + m_Radius < bounds.Top ) )
				return false;

			return true;
		}

		/// <summary>
		/// Draws the circle
		/// </summary>
		/// <param name="g">The Graphics object used for the drawing</param>
		/// <param name="ViewInfo">Information about the current map view</param>
		public void Draw(Graphics g, MapViewInfo ViewInfo )
		{

			// Draw at specified location
			Point p = ViewInfo.MapToControl( m_Location );

			int x = p.X;
			int y = p.Y;

			Brush brush = new SolidBrush( m_Color );
			Pen pen = new Pen( brush );

			// Change radius accordingly to zoom level
			int radius = ViewInfo.MapToControl( m_Radius );

			// Draw the circle
			g.DrawEllipse( pen, x - radius , y - radius, radius * 2, radius * 2 );

			if ( m_Fill )
			{
				// Fill it
				brush = new SolidBrush( m_FillColor );
				g.FillEllipse( brush, x - radius, y - radius, radius * 2, radius * 2 );
			}
		}

		#endregion
	}

	#endregion
}