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

namespace Crow
{
	public class Border : Container
	{
		#region CTOR
		public Border () : base(){}
		#endregion

		#region private fields
		int _borderWidth;
		#endregion

		#region public properties
		[XmlAttributeAttribute()][DefaultValue(1)]
		public virtual int BorderWidth {
			get { return _borderWidth; }
			set {
				_borderWidth = value;
				RegisterForGraphicUpdate ();
			}
		}
		[XmlAttributeAttribute()][DefaultValue("White")]
		public override Fill Foreground {
			get { return base.Foreground;}
			set {base.Foreground = value;}
		}
		#endregion

		#region GraphicObject override
		[XmlIgnore]public override Rectangle ClientRectangle {
			get {
				Rectangle cb = base.ClientRectangle;
				cb.Inflate (- BorderWidth);
				return cb;
			}
		}

		protected override int measureRawSize (LayoutingType lt)
		{
			int tmp = base.measureRawSize (lt);
			return tmp < 0 ? tmp : tmp + 2 * BorderWidth;
		}
		protected override void onDraw (Cairo.Context gr)
		{
			Rectangle rBack = new Rectangle (Slot.Size);

			rBack.Inflate (-Margin);
			if (BorderWidth > 0) 
				rBack.Inflate (-BorderWidth / 2);			

			Background.SetAsSource (gr, rBack);
			CairoHelpers.CairoRectangle(gr, rBack, CornerRadius);
			gr.Fill ();

			if (BorderWidth > 0) {
				gr.LineWidth = BorderWidth;
				Foreground.SetAsSource (gr, rBack);
				CairoHelpers.CairoRectangle(gr, rBack, CornerRadius);
				gr.Stroke ();
			}

			gr.Save ();
			//clip to client zone
			CairoHelpers.CairoRectangle (gr, ClientRectangle, CornerRadius);
			gr.Clip ();

			if (child != null)
				child.Paint (ref gr);
			gr.Restore ();
		}		
		#endregion
	}
}