using System;
using System.Collections.Generic;
using System.Text;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.Windows.Forms;

namespace DevComponents.DotNetBar.Layout
{
    /// <summary>
    /// Represents the item used as empty spacer element.
    /// </summary>
    public class LayoutSpacerItem : LayoutItemBase
    {
        #region Constructor

        #endregion

        #region Implementation
        protected override void OnPaintBackground(PaintContext context)
        {
            base.OnPaintBackground(context);

            if (this.DesignMode && !this.IsSelected && this.Bounds.Width > 0 && this.Bounds.Height > 0)
            {
                using (Pen borderPen = this.DesignTimeBorderPen)
                {
                    Rectangle clientRectangle = this.Bounds;
                    clientRectangle.Width--;
                    clientRectangle.Height--;
                    context.Graphics.DrawRectangle(borderPen, clientRectangle);
                }
            }
        }
        protected Pen DesignTimeBorderPen
        {
            get
            {
                Color color = (SystemColors.Control.GetBrightness() < 0.5) ? ControlPaint.Light(SystemColors.Control) : ControlPaint.Dark(SystemColors.Control);
                LayoutControl lc = GetLayoutControl();
                if (lc != null)
                    color = (lc.BackColor.GetBrightness() < 0.5) ? ControlPaint.Light(lc.BackColor) : ControlPaint.Dark(lc.BackColor);
                Pen pen = new Pen(color);
                pen.DashStyle = DashStyle.Dash;
                return pen;
            }
        }
        #endregion
    }
}