//
// MenuItem.cs
//
// Author:
//       Jean-Philippe Bruyère <jp.bruyere@hotmail.com>
//
// Copyright (c) 2013-2017 Jean-Philippe Bruyère
//
// 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.

using System;
using System.Xml.Serialization;
using System.ComponentModel;

namespace Crow
{
	public class MenuItem : Menu
	{
		#region CTOR
		public MenuItem () : base(){}
		public MenuItem (Interface iface) : base(iface) {}
		#endregion

		public event EventHandler Open;
		public event EventHandler Close;

		string caption;
		Command command;
		Picture icon;
		bool isOpened;
		Measure popWidth, popHeight;

		#region Public properties
		[XmlAttributeAttribute][DefaultValue(false)]
		public bool IsOpened {
			get { return isOpened; }
			set {
				if (isOpened == value)
					return;
				isOpened = value;
				NotifyValueChanged ("IsOpened", isOpened);

				if (isOpened) {
					onOpen (this, null);
					(LogicalParent as Menu).AutomaticOpenning = true;
				}else
					onClose (this, null);
			}
		}
		[XmlAttributeAttribute][DefaultValue(null)]
		public virtual Command Command {
			get { return command; }
			set {
				if (command == value)
					return;

				if (command != null) {
					command.raiseAllValuesChanged ();
					command.ValueChanged -= Command_ValueChanged;
				}

				command = value;

				if (command != null) {
					command.ValueChanged += Command_ValueChanged;
					command.raiseAllValuesChanged ();
				}

				NotifyValueChanged ("Command", command);
			}
		}
		[XmlAttributeAttribute]
		public override bool IsEnabled {
			get { return Command == null ? base.IsEnabled : Command.CanExecute; }
			set { base.IsEnabled = value; }
		}
		[XmlAttributeAttribute]
		public override string Caption {
			get { return Command == null ? base.Caption : Command.Caption; }
			set { base.Caption = value; }
		}
		[XmlAttributeAttribute]
		public Picture Icon {
			get { return Command == null ? icon : Command.Icon;; }
			set {
				if (icon == value)
					return;
				icon = value;
				if (command == null)
					NotifyValueChanged ("Icon", icon);
			}
		}
		[XmlAttributeAttribute()][DefaultValue("Fit")]
		public virtual Measure PopWidth {
			get { return popWidth; }
			set {
				if (popWidth == value)
					return;
				popWidth = value;
				NotifyValueChanged ("PopWidth", popWidth);
			}
		}
		[XmlAttributeAttribute()][DefaultValue("Fit")]
		public virtual Measure PopHeight {
			get { return popHeight; }
			set {
				if (popHeight == value)
					return;
				popHeight = value;
				NotifyValueChanged ("PopHeight", popHeight);
			}
		}
		#endregion

		public override void AddItem (GraphicObject g)
		{
			base.AddItem (g);
			g.NotifyValueChanged ("PopDirection", Alignment.Right);
		}

		void Command_ValueChanged (object sender, ValueChangeEventArgs e)
		{
			string mName = e.MemberName;
			if (mName == "CanExecute")
				mName = "IsEnabled";
			NotifyValueChanged (mName, e.NewValue);
		}
		void onMI_Click (object sender, MouseButtonEventArgs e)
		{
			if (command != null)
				command.Execute ();
			if(!IsOpened)
				(LogicalParent as Menu).AutomaticOpenning = false;
		}
		protected virtual void onOpen (object sender, EventArgs e){
			Open.Raise (this, null);
		}
		protected virtual void onClose (object sender, EventArgs e){
			Close.Raise (this, null);
		}
		public override bool MouseIsIn (Point m)
		{
			return IsEnabled && !IsDragged ? base.MouseIsIn (m) || child.MouseIsIn (m) : false;
		}
		public override void onMouseEnter (object sender, MouseMoveEventArgs e)
		{
			base.onMouseEnter (sender, e);
			if ((LogicalParent as Menu).AutomaticOpenning && items.Children.Count>0)
				IsOpened = true;
		}
		public override void onMouseLeave (object sender, MouseMoveEventArgs e)
		{
			if (IsOpened)
				IsOpened = false;
			base.onMouseLeave (this, e);
		}
	}
}