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

namespace HL_FristAidPlatform_Public
{
    public partial class SevenSegmentClock : UserControl
    {
        private DateTime _dateTime;

        //默认使用同时绘制日期和时间
        private SevenSegmentClockStyle _clockStyle = SevenSegmentClockStyle.DateAndTime;

        private Color _clockColor = Color.Black;

        //是否绘制阴影（即残影），以摸拟真似的LED时钟
        private bool _isDrawShadow = true;

        private Timer _timer = null;

        //是否自动更新时间
        private bool _isTimerEnable = false;

        private Graphics g = null;
        private Bitmap m_Bitmap = null;

        public bool IsDrawShadow
        {
            get { return this._isDrawShadow; }
            set
            {
                this._isDrawShadow = value;
                this.Invalidate();
            }
        }

        [Browsable(false)]
        public Timer Timer
        {
            get { return this._timer; }
            set
            {
                this._timer = value;
                if (_timer != null)
                {
                    _timer.Tick += new EventHandler(TimerOnTick);
                }
            }
        }

        public bool IsTimerEnable
        {
            get { return this._isTimerEnable; }
            set
            {
                if (value == true)
                {
                    if (this._timer == null)
                    {
                        _timer = new Timer();
                        _timer.Tick += new EventHandler(TimerOnTick);
                        _timer.Interval = 1000;
                        _timer.Enabled = true;
                    }
                }
                else
                {
                    if (this._timer != null)
                    {
                        _timer.Enabled = false;
                    }
                }
                this._isTimerEnable = value;
            }
        }

        public void Start()
        {
            this.IsTimerEnable = true;
            this.Refresh();
        }

        public void Stop()
        {
            this.IsTimerEnable = false;
        }

        public System.DateTime DateTime
        {
            get { return this._dateTime; }
            set { this._dateTime = value; }
        }

        //LED文字的颜色
        public System.Drawing.Color ClockColor
        {
            get { return this._clockColor; }
            set
            {
                this._clockColor = value;
                this.Invalidate();
            }
        }

        public SevenSegmentClockStyle SevenSegmentClockStyle
        {
            get { return this._clockStyle; }
            set
            {
                this._clockStyle = value;
                this.Invalidate();
            }
        }

        public SevenSegmentClock()
        {
            Text = "Seven-Segment Clock";
            //使用双缓冲，支持透明绘制
            SetStyle(ControlStyles.UserPaint | ControlStyles.DoubleBuffer | ControlStyles.AllPaintingInWmPaint
             | ControlStyles.ResizeRedraw | ControlStyles.SupportsTransparentBackColor, true);
            this.UpdateStyles();
            Init();
            _dateTime = DateTime.Now;
        }

        //初始化
        private void Init()
        {
            m_Bitmap = new Bitmap(this.Width, this.Height);

            g = Graphics.FromImage(m_Bitmap);
            g.CompositingQuality = CompositingQuality.HighQuality;
            g.TextRenderingHint = System.Drawing.Text.TextRenderingHint.AntiAliasGridFit;

            //g.InterpolationMode = InterpolationMode.HighQualityBicubic;
            g.SmoothingMode = SmoothingMode.HighQuality;
            //g.TextRenderingHint = System.Drawing.Text.TextRenderingHint.AntiAliasGridFit;
        }

        private void TimerOnTick(object obj, EventArgs ea)
        {
            DateTime dtNow = DateTime.Now;
            dtNow = new DateTime(dtNow.Year, dtNow.Month, dtNow.Day, dtNow.Hour, dtNow.Minute, dtNow.Second);
            if (dtNow != _dateTime)
            {
                _dateTime = dtNow;
                Invalidate();
            }
        }

        protected override void OnPaint(PaintEventArgs e)
        {
            m_Bitmap = DrawClock();
            Graphics gg = e.Graphics;
            gg.CompositingQuality = CompositingQuality.HighQuality;
            gg.DrawImageUnscaled(m_Bitmap, 0, 0);
            //g.Dispose();
        }

        public Bitmap DrawClock()
        {
            return this.DrawClock(this.ClientRectangle);
        }

        private void SevenSegmentClock_Resize(object sender, System.EventArgs e)
        {
            Init();
            this.Refresh();
        }

        private int _clockStringWidth;
        private int _clockStringHeight;

        public int ClockStringWidth
        {
            get
            {
                return _clockStringWidth;
            }
        }

        public int ClockStringHeight
        {
            get
            {
                return _clockStringHeight;
            }
        }

        //绘制时钟
        public Bitmap DrawClock(Rectangle destRect)
        {
            m_Bitmap = new Bitmap(destRect.Width, destRect.Height);
            //m_Bitmap = new Bitmap(destRect.X + this.Width, destRect.Y + this.Height);
            Graphics grfx = Graphics.FromImage(m_Bitmap);
            //设置绘图面板的绘制质量等
            grfx.CompositingQuality = CompositingQuality.HighQuality;
            grfx.TextRenderingHint = System.Drawing.Text.TextRenderingHint.AntiAliasGridFit;
            grfx.SmoothingMode = SmoothingMode.HighQuality;

            SevenSegmentDisplay ssd = new SevenSegmentDisplay(grfx);
            ssd.IsDrawShadow = this._isDrawShadow;
            GraphicsState gs = grfx.Save();
            grfx.TranslateTransform(destRect.X, destRect.Y);
            string strTime = string.Empty;
            if (this._clockStyle == SevenSegmentClockStyle.TimeOnly)
            {
                strTime = _dateTime.ToString("T", DateTimeFormatInfo.InvariantInfo);
            }
            else if (this._clockStyle == SevenSegmentClockStyle.DateOnly)
            {
                //设置日期格式
                strTime = _dateTime.ToString("yyyy-MM-dd", DateTimeFormatInfo.InvariantInfo);
            }
            else
            {
                strTime = _dateTime.ToString("yyyy-MM-dd", DateTimeFormatInfo.InvariantInfo) + " " + _dateTime.ToString("T", DateTimeFormatInfo.InvariantInfo);
            }

            SizeF sizef = ssd.MeasureString(strTime, Font);
            float fScale = Math.Min(destRect.Width / sizef.Width, destRect.Height / sizef.Height);
            Font font = new Font(Font.FontFamily, fScale * Font.SizeInPoints);

            sizef = ssd.MeasureString(strTime, font);
            _clockStringWidth = (int)sizef.Width;
            _clockStringHeight = (int)sizef.Height;

            ssd.DrawString(strTime, font, new SolidBrush(this._clockColor),
             (destRect.Width - sizef.Width) / 2,
             (destRect.Height - sizef.Height) / 2);
            grfx.Restore(gs);
            return m_Bitmap;
        }
    }
}