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

namespace LYFZ.ComponentLibrary
{
    [ToolboxBitmap(typeof(Button))] 
    public class ButtonExpand :System.Windows.Forms.Button // Control
    {
        /// <summary>
        /// 枚举按钮状态
        /// </summary>
        public enum State
        {
            /// <summary>
            /// 按钮默认时1
            /// </summary>
            Normal = 1,//
            /// <summary>
            /// 鼠标移上按钮时3
            /// </summary>
            MouseOver = 2,//
            /// <summary>
            /// 鼠标按下按钮时2
            /// </summary>
            MouseDown = 3,//
            
            /// <summary>
            /// 控件得到Tab焦点时
            /// </summary>
            Default = 4, //
            /// <summary>
            /// 当不启用按钮时5
            /// </summary>
            Disable =5  //（也就是按钮属性Enabled==Ture时）
        }

        #region//私有变量
        
        private State state = State.Normal;
        private SolidBrush brush;
        private Bitmap _BackImg = new Bitmap(LYFZ.ComponentLibrary.Properties.Resources.btn_bg);
        /// <summary>
        /// 
        /// </summary>
        [DescriptionAttribute("设置画到组件上背景图片"), CategoryAttribute("组件扩展属性")]
        public Bitmap BackImg
        {
            get { return _BackImg; }
            set { _BackImg = value; Invalidate(false); }
        }

        private Rectangle _BacklightLTRB=new Rectangle(10,10,27,22);
        /// <summary>
        /// 设置画到组件上背景图片位置
        /// </summary>
        [DescriptionAttribute("设置画到组件上背景图片位置"), CategoryAttribute("组件扩展属性"), TypeConverter(typeof(Rectangle))]
        public Rectangle BacklightLTRB
        {
            get { return _BacklightLTRB; }
            set { _BacklightLTRB = value; Invalidate(false); }
        }
        bool _isShowText = false;
        /// <summary>
        /// 
        /// </summary>
        [DescriptionAttribute("是否显示文字"), CategoryAttribute("组件扩展属性")]
        public bool IsShowText
        {
            get { return _isShowText; }
            set {
                _isShowText = value;
                if (_isShowText) {
                    if (this.Width == 27&&this.Height==22)
                    {
                        this.Size = new Size(75,22);
                    }
                    this.BackImg = LYFZ.ComponentLibrary.Properties.Resources.btn_bg4;
                    _BacklightLTRB = new Rectangle(10, 10, 26, 21);
                }
                 Invalidate(false); }
           
        }

        #endregion

        public ButtonExpand()
           // : base()
        {
            try
            {
                this.SetStyle(ControlStyles.DoubleBuffer, true);
                this.SetStyle(ControlStyles.AllPaintingInWmPaint, true);
                this.SetStyle(ControlStyles.UserPaint, true);
                this.SetStyle(ControlStyles.SupportsTransparentBackColor, true);
                this.SetStyle(ControlStyles.StandardDoubleClick, false);
                this.SetStyle(ControlStyles.Selectable, true);
                ResizeRedraw = true;
                BackColor = Color.Transparent;
                ForeColor = Color.White;//初始文本颜色
                 Size = new Size(27, 22);//初始大小
                Font = new Font("微软雅黑", 9, System.Drawing.FontStyle.Bold);//控件字体
               
            }
            catch { }
        }
       
        /// <summary>
        /// 按下
        /// </summary>
        /// <param name="e"></param>
        protected override void OnMouseDown(MouseEventArgs e)
        {
            base.OnMouseDown(e);
            this.state = State.MouseDown;
            Invalidate(false);
            
        }

        protected override void OnGotFocus(EventArgs e)
        {
            base.OnGotFocus(e);
            this.state = State.MouseOver;
            Invalidate(false);
        }

        /// <summary>
        /// 失去焦点后
        /// </summary>
        /// <param name="e"></param>
        protected override void OnLostFocus(EventArgs e)
        {
            base.OnLostFocus(e);
            this.state = State.Normal;
            Invalidate(false);
        }
        /// <summary>
        /// 鼠标弹起后
        /// </summary>
        /// <param name="mevent"></param>
        protected override void OnMouseUp(MouseEventArgs mevent)
        {
            base.OnMouseUp(mevent);
            this.state = State.MouseOver;
            Invalidate(false);
        }
        /// <summary>
        /// 鼠标移上控件
        /// </summary>
        /// <param name="e"></param>
        protected override void OnMouseEnter(EventArgs e)
        {
            base.OnMouseEnter(e);
            state = State.MouseOver;
            Invalidate(false);
        }
        /// <summary>
        /// 鼠标离开控件
        /// </summary>
        /// <param name="e"></param>
        protected override void OnMouseLeave(EventArgs e)
        {
            base.OnMouseLeave(e);
            
                state = State.Normal;
                Invalidate(false);
            
        }

      
        /// <summary>
        /// 重绘控件
        /// </summary>
        /// <param name="e"></param>
        protected override void OnPaint(System.Windows.Forms.PaintEventArgs e)
        {
            
            if (BackImg == null)
            {
                base.OnPaint(e);
                return;
            }
            
            int i = (int)state;
            //if (this.Focused && state != State.MouseDown ) i = 4;
            if (!this.Enabled) i = 5;
            Rectangle rc = this.ClientRectangle;
            Graphics g = e.Graphics;

            base.InvokePaintBackground(this, new PaintEventArgs(e.Graphics, base.ClientRectangle));
            try
            {
                if (BackImg != null)
                {
                        ImageDrawRect.DrawRect(g, BackImg, rc, Rectangle.FromLTRB(_BacklightLTRB.X, _BacklightLTRB.Y, _BacklightLTRB.Width, _BacklightLTRB.Height), i, 5);
                }
            }
            catch
            { }

            Image img = null;
            Size txts, imgs;

            txts = Size.Empty;
            imgs = Size.Empty;

            if (this.Image != null)
            {
                img = this.Image;
            }
            else if (this.ImageList != null && this.ImageIndex != -1)
            {
                img = this.ImageList.Images[this.ImageIndex];
            }

            if (img != null)
            {
                imgs.Width = img.Width;
                imgs.Height = img.Height;
            }

            StringFormat format1;
            using (format1 = new StringFormat())
            {
                format1.HotkeyPrefix = System.Drawing.Text.HotkeyPrefix.Show;
                SizeF ef1 = g.MeasureString(this.Text, this.Font, new SizeF((float)rc.Width, (float)rc.Height), format1);

                txts = Size.Ceiling(ef1);
                
            }

            rc.Inflate(-4, -4);
            if (imgs.Width * imgs.Height != 0)
            {
                Rectangle imgr = rc;
                imgr = ImageDrawRect.HAlignWithin(imgs, imgr, this.ImageAlign);
                imgr = ImageDrawRect.VAlignWithin(imgs, imgr, this.ImageAlign);
               
                if (!this.Enabled)
                {
                    ControlPaint.DrawImageDisabled(g, img, imgr.Left, imgr.Top, this.BackColor);
                }
                else
                {
                    g.DrawImage(img, imgr.Left, imgr.Top, img.Width, img.Height);
                }
            }

            

                Rectangle txtr = rc;
                
                    txtr = ImageDrawRect.HAlignWithin(txts, txtr, this.TextAlign);
                    txtr = ImageDrawRect.VAlignWithin(txts, txtr, this.TextAlign);
                    txtr.Y += 5;
                    format1 = new StringFormat();
                    format1.HotkeyPrefix = System.Drawing.Text.HotkeyPrefix.Show;

                    if (this.RightToLeft == RightToLeft.Yes)
                    {
                        format1.FormatFlags |= StringFormatFlags.DirectionRightToLeft;
                    }
                    brush = new SolidBrush(this.ForeColor);
                    if (IsShowText)
                    g.DrawString(this.Text, this.Font, brush, (RectangleF)txtr, format1);
                
                brush.Dispose();
                

        }
    }
}