using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Drawing;
using System.Data;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using TestProject.Properties;
using System.Drawing.Text;
using System.Drawing.Drawing2D;

namespace TestProject
{
    public partial class QQButton : Button
    {
        private EMouseEnum _mouseState = EMouseEnum.Normal;

        private bool _isShowBorder = true;

        private TextFormatFlags _textAlign = TextFormatFlags.VerticalCenter | TextFormatFlags.HorizontalCenter;

        public QQButton()
        {
            InitializeComponent();
        }

        internal EMouseEnum MouseState
        {
            get { return this._mouseState; }
            set
            {
                this._mouseState = value;
                base.Invalidate();
            }
        }

        /// <summary>
        /// 整个按钮的区域
        /// </summary>
        internal Rectangle AllRect
        {
            get { return new Rectangle(0, 0, this.Width, this.Height); }
        }

        /// <summary>
        /// 是否显示发光边框
        /// </summary>
        [Description("是否显示发光边框")]
        public virtual bool IsShowBorder
        {
            get { return this._isShowBorder; }
            set { this._isShowBorder = value; }
        }
        /// <summary>
        /// 文字区域
        /// </summary>
        internal Rectangle TextRect
        {
            get { return new Rectangle(2, 2, this.AllRect.Width - 4, this.AllRect.Height - 4); }
        }

        /// <summary>
        /// 按钮上文字的对齐方式
        /// </summary>
        [Description("按钮上文字的对齐方式")]
        new public ContentAlignment TextAlign
        {
            get { return base.TextAlign; }
            set
            {
                base.TextAlign = value;
                switch (base.TextAlign)
                {
                    case ContentAlignment.BottomCenter:
                        this._textAlign = TextFormatFlags.Bottom |
                                          TextFormatFlags.HorizontalCenter |
                                          TextFormatFlags.SingleLine;
                        break;
                    case ContentAlignment.BottomLeft:
                        this._textAlign = TextFormatFlags.Bottom |
                                          TextFormatFlags.Left |
                                          TextFormatFlags.SingleLine;
                        break;
                    case ContentAlignment.BottomRight:
                        this._textAlign = TextFormatFlags.Bottom |
                                          TextFormatFlags.Right |
                                          TextFormatFlags.SingleLine;
                        break;
                    case ContentAlignment.MiddleCenter:
                        this._textAlign = TextFormatFlags.SingleLine |
                                          TextFormatFlags.HorizontalCenter |
                                          TextFormatFlags.VerticalCenter;
                        break;
                    case ContentAlignment.MiddleLeft:
                        this._textAlign = TextFormatFlags.Left |
                                          TextFormatFlags.VerticalCenter |
                                          TextFormatFlags.SingleLine;
                        break;
                    case ContentAlignment.MiddleRight:
                        this._textAlign = TextFormatFlags.Right |
                                          TextFormatFlags.VerticalCenter |
                                          TextFormatFlags.SingleLine;
                        break;
                    case ContentAlignment.TopCenter:
                        this._textAlign = TextFormatFlags.Top |
                                          TextFormatFlags.HorizontalCenter |
                                          TextFormatFlags.SingleLine;
                        break;
                    case ContentAlignment.TopLeft:
                        this._textAlign = TextFormatFlags.Top |
                                          TextFormatFlags.Left |
                                          TextFormatFlags.SingleLine;
                        break;
                    case ContentAlignment.TopRight:
                        this._textAlign = TextFormatFlags.Top |
                                          TextFormatFlags.Right |
                                          TextFormatFlags.SingleLine;
                        break;
                }
                base.Invalidate(this.TextRect);
            }
        }

        protected override void OnPaint(PaintEventArgs pevent)
        {
            Graphics g = pevent.Graphics;
            g.SmoothingMode = SmoothingMode.AntiAlias;
            g.TextRenderingHint = TextRenderingHint.ClearTypeGridFit;
            switch (MouseState)
            {
                case EMouseEnum.Leave:
                case EMouseEnum.Normal:
                    if (base.Focused)
                    {
                        if (this.IsShowBorder)
                        {
                            using (Image focus = Resources.focus)
                            {
                                DrawHelper.RendererBackground(g, this.TextRect, focus, true);
                            }
                        }
                        else
                        {
                            DrawHelper.RendererBackground(g, this.TextRect, Resources.normal, true);
                        }
                    }
                    else
                    {
                        DrawHelper.RendererBackground(g, this.TextRect, Resources.normal, true);
                    }
                    break;
                case EMouseEnum.Up:
                case EMouseEnum.Move:
                    DrawHelper.RendererBackground(g, this.TextRect, Resources.highlight, true);
                    break;
                case EMouseEnum.Down:
                    DrawHelper.RendererBackground(g, this.TextRect, Resources.Light, true);
                    break;
            }
            TextRenderer.DrawText(g, this.Text, this.Font, this.TextRect, this.ForeColor, this._textAlign);
        }

        /// <summary>
        /// 引发 System.Windows.Forms.Form.MouseEnter 事件。
        /// </summary>
        /// <param name="e">包含事件数据的 System.EventArgs。</param>
        protected override void OnMouseEnter(EventArgs e)
        {
            base.OnMouseEnter(e);
            this.MouseState = EMouseEnum.Move;
        }

        /// <summary>
        /// 引发 System.Windows.Forms.Form.MouseLeave 事件。
        /// </summary>
        /// <param name="e">包含事件数据的 System.EventArgs。</param>
        protected override void OnMouseLeave(EventArgs e)
        {
            base.OnMouseLeave(e);
            this.MouseState = EMouseEnum.Leave;
        }

        /// <summary>
        /// 引发 System.Windows.Forms.Form.MouseDown 事件。
        /// </summary>
        /// <param name="mevent">包含事件数据的 System.Windows.Forms.MouseEventArgs。</param>
        protected override void OnMouseDown(MouseEventArgs mevent)
        {
            base.OnMouseDown(mevent);
            this.MouseState = EMouseEnum.Down;
        }

        /// <summary>
        /// 引发 System.Windows.Forms.Form.MouseUp 事件。
        /// </summary>
        /// <param name="mevent">包含事件数据的 System.Windows.Forms.MouseEventArgs。</param>
        protected override void OnMouseUp(MouseEventArgs mevent)
        {
            base.OnMouseUp(mevent);
            this.MouseState = EMouseEnum.Up;
        }
    }
}