using System.ComponentModel;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.Windows.Forms;
using System.Windows.Forms.Design;

namespace Lskj.Control.ImageLibrary
{
    /// <summary>
    /// ImageCarousel控件设计模式行为
    /// </summary>
    [Description("ImageCarousel控件设计模式行为")]
    public class ImageCarouselExtDesigner : ControlDesigner
    {
        protected override void OnPaintAdornments(PaintEventArgs pe)
        {
            base.OnPaintAdornments(pe);
            this.DrawTipText(pe.Graphics);
            this.DrawBorder(pe.Graphics);
        }

        /// <summary>
        /// 绘制虚线边框
        /// </summary>
        /// <param name="graphics"></param>
        private void DrawBorder(Graphics graphics)
        {
            ImageCarouselExt control = (ImageCarouselExt)this.Control;
            Rectangle clientRectangle = control.ClientRectangle;
            Pen pen = new Pen((double)control.BackColor.GetBrightness() >= 0.5 ? ControlPaint.Dark(control.BackColor) : ControlPaint.Light(control.BackColor));
            pen.DashStyle = DashStyle.Dash;
            --clientRectangle.Width;
            --clientRectangle.Height;
            graphics.DrawRectangle(pen, clientRectangle);

            #region
            RectangleF rectf = control.GetDisplayRectangle();
            pen.DashStyle = DashStyle.Solid;
            pen.Color = Color.OliveDrab;
            graphics.DrawRectangle(pen, rectf.X, rectf.Y, rectf.Width, rectf.Height);
            #endregion

            pen.Dispose();
        }

        /// <summary>
        /// 绘制提示文本
        /// </summary>
        /// <param name="graphics"></param>
        private void DrawTipText(Graphics graphics)
        {
            ImageCarouselExt _control = (ImageCarouselExt)this.Control;
            System.Windows.Forms.Control control = this.Control;
            if (_control.Images.Count < 1)
            {
                string text = "请添加图片";
                SizeF text_size = graphics.MeasureString(text, _control.Font);
                SolidBrush text_sb = new SolidBrush((double)control.BackColor.GetBrightness() >= 0.5 ? ControlPaint.Dark(control.BackColor) : ControlPaint.Light(control.BackColor));
                graphics.DrawString(text, _control.Font, text_sb, new RectangleF(control.ClientRectangle.X + (control.ClientRectangle.Width - text_size.Width) / 2f, control.ClientRectangle.Y + (control.ClientRectangle.Height - text_size.Height) / 2f, text_size.Width, text_size.Height));
                text_sb.Dispose();
            }
        }

    }
}