using System;
using System.Windows.Forms;
using System.Drawing;
using System.Drawing.Text;
using System.Diagnostics;
using System.Runtime.InteropServices;
using System.Reflection;
using System.Resources;
using UtilityLibrary.Win32;
using UtilityLibrary.WinControls;
using UtilityLibrary.General;
using UtilityLibrary.CommandBars;

namespace UtilityLibrary.Menus
{
	/// <summary>
	/// Summary description for MenuItemEx.
	/// </summary>
	public class MenuItemEx : MenuItem
	{
		static ColorGroup group = ColorGroup.GetColorGroup();
		static Color bgColor  = group.bgColor;
		static Color stripeColor = group.stripeColor;
		static Color selectionColor  = group.selectionColor;
		static Color borderColor = group.borderColor;
		static Color darkSelectionColor = group.darkSelectionColor;
		
		static int iconSize = SystemInformation.SmallIconSize.Width + 5;
		static int itemHeight;
		static bool doColorUpdate = false;
		string shortcuttext = "";
		Bitmap icon = null;
		EventHandler clickHandler = null;
		
		// We could use an image list to associate
		// the menu items with an bitmap instead of
		// assigning a whole Bitmap object to the menu item
		ImageList imageList = null;
		int imageIndex = -1;


		static int BITMAP_SIZE = 16;
		static int STRIPE_WIDTH = iconSize + 2;
		protected static ImageList menuImages;
		static Color transparentColor = Color.FromArgb(192, 192, 192);
								
		static MenuItemEx()
		{
			// Initialize menu glyphs: checkmark and bullet
			menuImages = new ImageList();
			menuImages.ImageSize = new Size(BITMAP_SIZE, BITMAP_SIZE);
			Assembly thisAssembly = Assembly.GetAssembly(Type.GetType("UtilityLibrary.Menus.MenuItemEx"));
			ResourceManager rm = new ResourceManager("UtilityLibrary.Resources.ImagesMenu", thisAssembly);
			Bitmap glyphs = (Bitmap)rm.GetObject("Glyphs");
			glyphs.MakeTransparent(transparentColor);
			menuImages.Images.AddStrip(glyphs);
		}
		
		// constructors
		// ---------------------------------------------------
		public MenuItemEx() : this(null, null)
		{
		}	

		public MenuItemEx(string name, EventHandler handler, Shortcut shortcut) : this(name, handler)
		{
			Initialize(null, shortcut, handler, null, -1);
		}
		
		public MenuItemEx(string name, Bitmap icon, Shortcut shortcut, EventHandler handler) : this(name, handler)
		{
			Initialize(icon, shortcut, handler, null, -1);
		}

		public MenuItemEx(string name, ImageList imageList, int imageIndex, Shortcut shortcut, EventHandler handler) : this(name, handler)
		{
			Initialize(icon, shortcut, handler, imageList, imageIndex);
		}

		public MenuItemEx(string name, EventHandler handler) : base(name, handler)
		{
			Initialize(null, Shortcut.None, handler, null, -1);
		}

		private void Initialize(Bitmap bitmap, Shortcut shortcut, EventHandler handler, ImageList list, int imageIndex)
		{
			OwnerDraw = true;
			this.Shortcut = shortcut;
			icon = bitmap;
			clickHandler = handler;
			imageList = list;
			this.imageIndex = imageIndex;

		}

		static public MenuItem CloneMenu(MenuItemEx currentItem)
		{
			MenuItemEx clonedItem = new MenuItemEx(currentItem.Text, (Bitmap)currentItem.Icon, 
				(Shortcut)currentItem.Shortcut, currentItem.ClickHandler);
			// Preserve the enable and check state
			clonedItem.Enabled = currentItem.Enabled;
			clonedItem.Checked = currentItem.Checked;
			clonedItem.RadioCheck = currentItem.RadioCheck;

			foreach (MenuItemEx item in currentItem.MenuItems)
			{
				clonedItem.MenuItems.Add(CloneMenu(item));
			}
			return clonedItem;
		}

		public Bitmap Icon 
		{
			get 
			{
				return icon;
			}
			set 
			{
				icon = value;
			}
		}

		public string ShortcutText 
		{
			get 
			{
				return shortcuttext;
			}
			set 
			{
				shortcuttext = value;
			}
		}

		public Color TransparentColor
		{
			get 
			{
				return transparentColor;
			}
			set
			{
				transparentColor = value;
			}
		}

		public ImageList ImageList
		{
			set 
			{ 
				imageList = value; 
			}
			get { return imageList; }
		}

		public int ImageIndex
		{
			set { imageIndex = value; }
			get { return imageIndex;  }
		}

		public EventHandler ClickHandler
		{
			set { clickHandler = value;}
			get { return clickHandler; }
		}

		protected override void OnSelect(EventArgs e)
		{
			// This is to support popup menus when using this class
			// in conjunction with a toolbar that behaves like a menu
			Menu parent = Parent;
			while (!(parent is CommandBarMenu) &&   !(parent == null) )
			{
				if (parent is MenuItemEx)
					parent = (parent as MenuItemEx).Parent;
				else if (parent is MenuItem)
					parent = (parent as MenuItem).Parent;
				else if ( parent == Parent.GetMainMenu() )
					parent = null;
				else
					parent = null;
				
			}
				
			if ( parent is CommandBarMenu )
			{
				CommandBarMenu cbm = (CommandBarMenu)parent;
				cbm.SelectedMenuItem = this;
			}

			base.OnSelect(e);
		}

		static public void UpdateMenuColors(object sender, EventArgs e)
		{
			doColorUpdate = true;
		}

		static public void UpdateMenuColors()
		{
			doColorUpdate = true;
		}

		private void DoUpdateMenuColors()
		{
			ColorGroup group = ColorGroup.GetColorGroup();
			bgColor  = group.bgColor;
			stripeColor = group.stripeColor;
			selectionColor  = group.selectionColor;
			borderColor = group.borderColor;
			darkSelectionColor = group.darkSelectionColor;
			
			doColorUpdate = false;

		}
	            		
		// overrides
		// ---------------------------------------------------------
		protected override void OnMeasureItem(MeasureItemEventArgs e)
		{
			base.OnMeasureItem(e);
			
			// measure shortcut text
			if (Shortcut != Shortcut.None) 
			{
				string text = "";
				int    key  = (int)Shortcut;
				int    ch   = key & 0xFF;
				if (((int)Keys.Control & key) > 0)
					text += "Ctrl+";
				if (((int)Keys.Shift & key) > 0)
					text += "Shift+";
				if (((int)Keys.Alt & key) > 0)
					text += "Alt+";
				
				if (ch >= (int)Shortcut.F1 && ch <= (int)Shortcut.F12)
					text += "F" + (ch - (int)Shortcut.F1 + 1);
				else 
				{
					if ( Shortcut == Shortcut.Del) 
					{
						text += "Del";
					}
					else 
					{
						text += (char)ch;
					}
				}
				shortcuttext = text;
			} 
			
			if (Text == "-") 
			{
				e.ItemHeight = 8;
				e.ItemWidth  = 4;
				return;
			}
				
			bool topLevel = Parent == Parent.GetMainMenu();
			string tempShortcutText = shortcuttext;
			if ( topLevel ) 
			{
				tempShortcutText = "";
			}
			int textwidth = (int)(e.Graphics.MeasureString(Text + tempShortcutText, SystemInformation.MenuFont).Width);