using System;
using System.Collections.Generic;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace JYControl
{
    public static class ControlHelper
    {
        /// <summary>
        /// The m LST freeze control
        /// </summary>
        static Dictionary<Control, bool> m_lstFreezeControl = new Dictionary<Control, bool>();

        public static void FreezeControl(Control control, bool blnToFreeze)
        {
            if (blnToFreeze && control.IsHandleCreated && control.Visible && !control.IsDisposed && (!m_lstFreezeControl.ContainsKey(control) || (m_lstFreezeControl.ContainsKey(control) && m_lstFreezeControl[control] == false)))
            {
                m_lstFreezeControl[control] = true;
                control.Disposed += control_Disposed;
                NativeMethods.SendMessage(control.Handle, 11, 0, 0);
            }
            else if (!blnToFreeze && !control.IsDisposed && m_lstFreezeControl.ContainsKey(control) && m_lstFreezeControl[control] == true)
            {
                m_lstFreezeControl.Remove(control);
                NativeMethods.SendMessage(control.Handle, 11, 1, 0);
                control.Invalidate(true);
            }
        }

        /// <summary>
        /// Handles the Disposed event of the control control.
        /// </summary>
        /// <param name="sender">The source of the event.</param>
        /// <param name="e">The <see cref="EventArgs" /> instance containing the event data.</param>
        static void control_Disposed(object sender, EventArgs e)
        {
            try
            {
                if (m_lstFreezeControl.ContainsKey((Control)sender))
                    m_lstFreezeControl.Remove((Control)sender);
            }
            catch { }
        }

        /// <summary>
        /// 设置GDI高质量模式抗锯齿
        /// </summary>
        /// <param name="g">The g.</param>
        public static void SetGDIHigh(this Graphics g)
        {
            g.SmoothingMode = SmoothingMode.AntiAlias;  //使绘图质量最高，即消除锯齿
            g.InterpolationMode = InterpolationMode.HighQualityBicubic;
            g.CompositingQuality = CompositingQuality.HighQuality;
        }

        /// <summary>
        /// 根据矩形和圆得到一个圆角矩形Path
        /// </summary>
        /// <param name="rect">The rect.</param>
        /// <param name="cornerRadius">The corner radius.</param>
        /// <returns>GraphicsPath.</returns>
        public static GraphicsPath CreateRoundedRectanglePath(this Rectangle rect, int cornerRadius)
        {
            GraphicsPath roundedRect = new GraphicsPath();
            roundedRect.AddArc(rect.X, rect.Y, cornerRadius * 2, cornerRadius * 2, 180, 90);
            roundedRect.AddLine(rect.X + cornerRadius, rect.Y, rect.Right - cornerRadius * 2, rect.Y);
            roundedRect.AddArc(rect.X + rect.Width - cornerRadius * 2, rect.Y, cornerRadius * 2, cornerRadius * 2, 270, 90);
            roundedRect.AddLine(rect.Right, rect.Y + cornerRadius * 2, rect.Right, rect.Y + rect.Height - cornerRadius * 2);
            roundedRect.AddArc(rect.X + rect.Width - cornerRadius * 2, rect.Y + rect.Height - cornerRadius * 2, cornerRadius * 2, cornerRadius * 2, 0, 90);
            roundedRect.AddLine(rect.Right - cornerRadius * 2, rect.Bottom, rect.X + cornerRadius * 2, rect.Bottom);
            roundedRect.AddArc(rect.X, rect.Bottom - cornerRadius * 2, cornerRadius * 2, cornerRadius * 2, 90, 90);
            roundedRect.AddLine(rect.X, rect.Bottom - cornerRadius * 2, rect.X, rect.Y + cornerRadius * 2);
            roundedRect.CloseFigure();
            return roundedRect;
        }
    }
}