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

namespace WinCustControls
{
    public partial class UCPipe : UserControl
    {
        public UCPipe()
        {
            InitializeComponent();
            SetStyle(ControlStyles.AllPaintingInWmPaint, true);//忽略窗口消息，减少闪烁
            SetStyle(ControlStyles.OptimizedDoubleBuffer, true);//绘制到缓冲区，减少闪烁
            SetStyle(ControlStyles.UserPaint, true);//控件由其自身而不是操作系统绘制
            SetStyle(ControlStyles.ResizeRedraw, true);//控件调整其大小时重绘
            SetStyle(ControlStyles.SupportsTransparentBackColor, true);//支持透明背景
            SizeChanged += UCPipe_SizeChanged;
            this.Size = new Size(200, 30);
            timer = new System.Timers.Timer();
            timer.Interval = 100;
            timer.AutoReset = true;
            timer.Elapsed += Timer_Elapsed;
        }

        private void Timer_Elapsed(object sender, System.Timers.ElapsedEventArgs e)
        {
            intLineLeft += 2;
            if (intLineLeft > 12)
            {
                intLineLeft = 0;
            }
            Invalidate();
        }

        System.Timers.Timer timer = null;
        int intLineLeft = 0;//线的左边距离
        int intPenWidth = 0;//圆弧的半径
        private void UCPipe_SizeChanged(object sender, EventArgs e)
        {
            intPenWidth = pipeStyle.ToString().Substring(0, 1) == "H" ? Height : Width;
        }


        private PipeStyle pipeStyle = PipeStyle.Horizontal_None_None;
        [DefaultValue(typeof(PipeStyle), "Horizontal_None_None"), Description("管道样式")]
        public PipeStyle PipeStyle
        {
            get { return pipeStyle; }
            set
            {
                string oldStr = pipeStyle.ToString().Substring(0, 1);
                string newStr = value.ToString().Substring(0, 1);
                pipeStyle = value;
                if (oldStr != newStr)
                {
                    Size = new Size(Size.Height, Size.Width);
                }
                Invalidate();
            }
        }

        private bool isFlow = false;
        [DefaultValue(typeof(bool), "False"), Description("是否流动")]
        public bool IsFlow
        {
            get { return isFlow; }
            set
            {
                isFlow = value;
                if (isFlow)
                {
                    timer.Start();
                }
                else
                {
                    timer.Stop();
                }
                Invalidate();
            }
        }

        private int flowWidth = 4;
        [DefaultValue(typeof(int), "4"), Description("流动线的粗细")]
        public int FlowWidth
        {
            get { return flowWidth; }
            set
            {
                flowWidth = value;
                if (flowWidth <= 0)
                    return;
                Invalidate();
            }
        }

        private int flowLength = 8;
        [DefaultValue(typeof(int), "4"), Description("流动线的长度")]
        public int FlowLength
        {
            get { return flowLength; }
            set
            {
                flowLength = value;
                Invalidate();
            }
        }

        private int flowSpace = 6;
        [DefaultValue(typeof(int), "6"), Description("流动线的间隔")]
        public int FlowSpace
        {
            get { return flowSpace; }
            set
            {
                flowSpace = value;
                Invalidate();
            }
        }

        private Color pipeColor = Color.LightBlue;
        [DefaultValue(typeof(Color), "LightBlue"), Description("管道的颜色")]
        public Color PipeColor
        {
            get { return pipeColor; }
            set
            {
                pipeColor = value;
                Invalidate();
            }
        }

        private Color flowColor = Color.White;
        [DefaultValue(typeof(Color), "White"), Description("流动线的颜色")]
        public Color FlowColor
        {
            get { return flowColor; }
            set
            {
                flowColor = value;
                Invalidate();
            }
        }

        private FlowDirection flowDirection = FlowDirection.Forward;
        [DefaultValue(typeof(FlowDirection), "Forward"), Description("流动的方向")]
        public FlowDirection FlowDirection
        {
            get { return flowDirection; }
            set
            {
                flowDirection = value;
                Invalidate();
            }
        }

        private int flowSpeed = 100;
        [DefaultValue(typeof(int), "100"), Description("流动速度")]
        public int FlowSpeed
        {
            get { return flowSpeed; }
            set
            {
                if (value <= 0)
                    return;
                flowSpeed = value;
                timer.Interval = flowSpeed;
                Invalidate();
            }
        }

        protected override void OnPaint(PaintEventArgs e)
        {
            base.OnPaint(e);
            Graphics g = e.Graphics;
            g.SmoothingMode = SmoothingMode.AntiAlias;
            //管道轮廓路径 
            GraphicsPath path = new GraphicsPath();
            //流动线外围的路径
            GraphicsPath linePath = new GraphicsPath();
            switch (pipeStyle)
            {
                case PipeStyle.Horizontal_None_None://水平
                    path.AddLines(new PointF[] {
                        new PointF(0,0),
                        new PointF(ClientRectangle.Right,0),
                        new PointF(ClientRectangle.Right,Height),
                        new PointF(0,Height)
                    });
                    path.CloseAllFigures();//闭合
                    //添加中间流动线路径 
                    linePath.AddLine(0, Height / 2, Width, Height / 2);
                    break;
                case PipeStyle.Horizontal_Up_None://水平左上弯
                    path.AddLines(new PointF[]
                    {
                        new PointF(0, 0),
                        new PointF(this.ClientRectangle.Right, 0),
                        new PointF(this.ClientRectangle.Right, this.Height),
                        new PointF(0+intPenWidth, this.Height)//左下角点  下边直线弯道前的点 
                    });
                    //添加上弯弧线  所在圆的矩形左上角y：intPenWidth * -1
                    path.AddArc(new Rectangle(0, intPenWidth * -1, intPenWidth * 2, intPenWidth * 2), 90, 90);
                    path.CloseAllFigures();//闭合
                    //添加中间流动线  左边圆弧+右边直线
                    linePath.AddArc(new Rectangle(intPenWidth / 2 + 1, -1 * intPenWidth / 2 - 1, intPenWidth, intPenWidth), 181, -91);
                    //右边直线
                    linePath.AddLine(intPenWidth, this.Height / 2, this.Width, this.Height / 2);
                    break;
                case PipeStyle.Horizontal_Down_None://水平左下弯
                    path.AddLines(new PointF[]
                    {
                        new PointF(intPenWidth, 0),//上边横线的起点
                        new PointF(this.ClientRectangle.Right, 0),//右上角点
                        new PointF(this.ClientRectangle.Right, this.Height),//右下角点
                        new PointF(0, this.Height)//左下角点
                    });
                    //左上角圆弧  向上旋转90度
                    path.AddArc(new Rectangle(0, 0, intPenWidth * 2, intPenWidth * 2), 180, 90);
                    path.CloseAllFigures();//闭合
                    //添加流动线向上旋转弧
                    linePath.AddArc(new Rectangle(intPenWidth / 2 + 1, this.Height / 2, intPenWidth, intPenWidth), 179, 91);
                    //流动线 向右直线
                    linePath.AddLine(intPenWidth + 1, this.Height / 2, this.Width, this.Height / 2);
                    break;
                case PipeStyle.Horizontal_None_Up://水平右上弯
                    path.AddLines(new PointF[]
                    {
                        //右下角直线起点（右边就是向下旋转弧）
                        new PointF(this.ClientRectangle.Right-intPenWidth, this.Height),
                        //左下角点
                        new PointF(0, this.Height),
                        //左上角点
                        new PointF(0, 0),
                        //右上角点
                        new PointF(this.ClientRectangle.Right, 0)
                    });
                    //添加右下角弧线
                    path.AddArc(new Rectangle(this.ClientRectangle.Right - intPenWidth * 2, intPenWidth * -1, intPenWidth * 2, intPenWidth * 2), 0, 90);
                    path.CloseAllFigures();
                    //添加中间流动线
                    linePath.AddLine(0, this.Height / 2, this.Width - intPenWidth, this.Height / 2);
                    linePath.AddArc(new Rectangle(this.ClientRectangle.Right - intPenWidth - intPenWidth / 2 - 1, -1 * intPenWidth / 2 - 1, intPenWidth, intPenWidth), 91, -91);
                    break;
                case PipeStyle.Horizontal_None_Down://水平右下弯
                    path.AddLines(new PointF[]
                    {
                        new PointF(this.ClientRectangle.Right, this.Height),//右下角点
                        new PointF(0, this.Height),//右下角点
                        new PointF(0, 0),//左上角点
                        new PointF(this.ClientRectangle.Right-intPenWidth, 0)//右上角点（右边是向下圆弧）
                    });
                    //添加右上角弧线
                    path.AddArc(new Rectangle(this.ClientRectangle.Right - intPenWidth * 2, -1, intPenWidth * 2, intPenWidth * 2), 270, 90);
                    path.CloseAllFigures();
                    //添加流动线+弧线
                    linePath.AddLine(0, this.Height / 2, this.Width - intPenWidth - 1, this.Height / 2);
                    linePath.AddArc(new Rectangle(this.ClientRectangle.Right - intPenWidth - intPenWidth / 2 - 1, intPenWidth / 2, intPenWidth, intPenWidth), 269, 91);
                    break;
                case PipeStyle.Horizontal_Down_Up://水平左下右上
                    //添加上边直线（去掉弧线部分）
                    path.AddLine(new Point(intPenWidth, 0), new Point(this.Width, 0));
                    //添加右下角弧线
                    path.AddArc(new Rectangle(this.ClientRectangle.Right - intPenWidth * 2, intPenWidth * -1, intPenWidth * 2, intPenWidth * 2), 0, 90);
                    //添加下线直线
                    path.AddLine(new Point(this.Width - intPenWidth, this.Height), new Point(0, this.Height));
                    //添加左上角弧线
                    path.AddArc(new Rectangle(0, 0, intPenWidth * 2, intPenWidth * 2), 180, 90);
                    path.CloseAllFigures();
                    //添加流动线圆弧 左上
                    linePath.AddArc(new Rectangle(intPenWidth / 2 + 1, this.Height / 2, intPenWidth, intPenWidth), 179, 91);
                    //添加流动线圆弧 右下
                    linePath.AddArc(new Rectangle(this.ClientRectangle.Right - intPenWidth - intPenWidth / 2 - 1, -1 * intPenWidth / 2 - 1, intPenWidth, intPenWidth), 91, -91);
                    break;
                case PipeStyle.Horizontal_Up_Down://左上右下
                    //添加上直线
                    path.AddLine(new Point(0, 0), new Point(this.Width - intPenWidth, 0));
                    //右上圆弧
                    path.AddArc(new Rectangle(this.ClientRectangle.Right - intPenWidth * 2, -1, intPenWidth * 2, intPenWidth * 2), 270, 90);
                    //添加下直线
                    path.AddLine(new Point(this.Width, this.Height), new Point(intPenWidth, this.Height));
                    //添加左下圆弧
                    path.AddArc(new Rectangle(0, intPenWidth * -1, intPenWidth * 2, intPenWidth * 2), 90, 90);
                    path.CloseAllFigures();
                    //流动线 添加圆弧 左上
                    linePath.AddArc(new Rectangle(intPenWidth / 2 + 1, -1 * intPenWidth / 2 - 1, intPenWidth, intPenWidth), 181, -91);
                    //流动线 中间直接
                    linePath.AddLine(intPenWidth, this.Height / 2, this.Width - intPenWidth - 1, this.Height / 2);
                    //流动线 右下圆弧
                    linePath.AddArc(new Rectangle(this.ClientRectangle.Right - intPenWidth - intPenWidth / 2 - 1, intPenWidth / 2, intPenWidth, intPenWidth), 269, 91);
                    break;
                case PipeStyle.Horizontal_Up_Up://左上右上
                    //上边直线
                    path.AddLine(new Point(0, 0), new Point(this.Width, 0));
                    //右下圆弧
                    path.AddArc(new Rectangle(this.ClientRectangle.Right - intPenWidth * 2, intPenWidth * -1, intPenWidth * 2, intPenWidth * 2), 0, 90);
                    //下边直线
                    path.AddLine(new Point(this.Width - intPenWidth, this.Height), new Point(intPenWidth, this.Height));
                    //左上圆弧
                    path.AddArc(new Rectangle(0, intPenWidth * -1, intPenWidth * 2, intPenWidth * 2), 90, 90);
                    path.CloseAllFigures();
                    //添加流动线右下圆弧
                    linePath.AddArc(new Rectangle(intPenWidth / 2 + 1, -1 * intPenWidth / 2 - 1, intPenWidth, intPenWidth), 181, -91);
                    //添加流动线左下圆弧
                    linePath.AddArc(new Rectangle(this.ClientRectangle.Right - intPenWidth - intPenWidth / 2 - 1, -1 * intPenWidth / 2 - 1, intPenWidth, intPenWidth), 91, -91);
                    //添加左下圆弧
                    break;
                case PipeStyle.Horizontal_Down_Down://水平左下右下
                    //上边直线
                    path.AddLine(new Point(intPenWidth, 0), new Point(this.Width - intPenWidth, 0));
                    //右上角圆弧
                    path.AddArc(new Rectangle(this.ClientRectangle.Right - intPenWidth * 2, -1, intPenWidth * 2, intPenWidth * 2), 270, 90);
                    //下边线
                    path.AddLine(new Point(this.Width, this.Height), new Point(0, this.Height));
                    //左上角圆弧
                    path.AddArc(new Rectangle(0, -1, intPenWidth * 2, intPenWidth * 2), 180, 90);
                    path.CloseAllFigures();
                    //添加流动线 左上角圆弧
                    linePath.AddArc(new Rectangle(intPenWidth / 2 + 1, this.Height / 2, intPenWidth, intPenWidth), 179, 91);
                    //中间直线
                    linePath.AddLine(intPenWidth + 1, this.Height / 2, this.Width - intPenWidth - 1, this.Height / 2);
                    //右上角圆弧
                    linePath.AddArc(new Rectangle(this.ClientRectangle.Right - intPenWidth - intPenWidth / 2 - 1, intPenWidth / 2, intPenWidth, intPenWidth), 269, 91);
                    break;

                case PipeStyle.Vertical_None_None:
                    path.AddLines(new PointF[]
                    {
                        new PointF(0, 0),
                        new PointF(this.ClientRectangle.Right, 0),
                        new PointF(this.ClientRectangle.Right, this.Height),
                        new PointF(0, this.Height)
                    });
                    path.CloseAllFigures();
                    linePath.AddLine(this.Width / 2, 0, this.Width / 2, this.Height);
                    break;
                case PipeStyle.Vertical_Left_None:
                    path.AddLines(new PointF[]
                    {
                        new PointF(this.ClientRectangle.Right, intPenWidth),
                        new PointF(this.ClientRectangle.Right, this.Height),
                        new PointF(0, this.Height),
                        new PointF(0, 0)
                    });
                    path.AddArc(new Rectangle(-1 * intPenWidth, 0, intPenWidth * 2, intPenWidth * 2), 270, 90);
                    path.CloseAllFigures();

                    linePath.AddArc(new Rectangle(-1 * intPenWidth / 2 - 1, intPenWidth / 2 + 1, intPenWidth, intPenWidth), 269, 91);
                    linePath.AddLine(intPenWidth / 2, intPenWidth, intPenWidth / 2, this.Height);
                    break;
                case PipeStyle.Vertical_Right_None:
                    path.AddLines(new PointF[]
                    {
                        new PointF(this.ClientRectangle.Right, 0),
                        new PointF(this.ClientRectangle.Right, this.Height),
                        new PointF(0, this.Height),
                        new PointF(0, intPenWidth)
                    });
                    path.AddArc(new Rectangle(-1, 0, intPenWidth * 2, intPenWidth * 2), 180, 90);
                    path.CloseAllFigures();

                    linePath.AddArc(new Rectangle(intPenWidth / 2, intPenWidth / 2 + 1, intPenWidth, intPenWidth), 271, -91);
                    linePath.AddLine(intPenWidth / 2, intPenWidth + 1, intPenWidth / 2, this.Height);
                    break;
                case PipeStyle.Vertical_None_Left:
                    path.AddLines(new PointF[]
                    {
                        new PointF(0, this.Height),
                        new PointF(0, 0),
                        new PointF(this.ClientRectangle.Right, 0),
                        new PointF(this.ClientRectangle.Right, this.Height-intPenWidth),
                    });
                    path.AddArc(new Rectangle(-1 * intPenWidth, this.Height - intPenWidth * 2, intPenWidth * 2, intPenWidth * 2), 0, 90);
                    path.CloseAllFigures();

                    linePath.AddLine(this.Width / 2, 0, this.Width / 2, this.Height - intPenWidth);
                    linePath.AddArc(new Rectangle(-1 * intPenWidth / 2 - 1, this.Height - intPenWidth - intPenWidth / 2 - 1, intPenWidth, intPenWidth), -1, 91);
                    break;
                case PipeStyle.Vertical_None_Right:
                    path.AddLines(new PointF[]
                    {
                        new PointF(0, this.Height-intPenWidth),
                        new PointF(0, 0),
                        new PointF(this.ClientRectangle.Right, 0),
                        new PointF(this.ClientRectangle.Right, this.Height),
                    });
                    path.AddArc(new Rectangle(-1, this.Height - intPenWidth * 2, intPenWidth * 2, intPenWidth * 2), 90, 90);
                    path.CloseAllFigures();

                    linePath.AddLine(this.Width / 2, 0, this.Width / 2, this.Height - intPenWidth - 1);
                    linePath.AddArc(new Rectangle(intPenWidth / 2, this.Height - intPenWidth - intPenWidth / 2 - 1, intPenWidth, intPenWidth), 181, -91);
                    break;
                case PipeStyle.Vertical_Left_Right:
                    path.AddLine(this.Width, intPenWidth, this.Width, this.Height);
                    path.AddArc(new Rectangle(-1, this.Height - intPenWidth * 2, intPenWidth * 2, intPenWidth * 2), 90, 90);
                    path.AddLine(0, this.Height - intPenWidth, 0, 0);
                    path.AddArc(new Rectangle(-1 * intPenWidth, 0, intPenWidth * 2, intPenWidth * 2), 270, 90);
                    path.CloseAllFigures();

                    linePath.AddArc(new Rectangle(-1 * intPenWidth / 2 - 1, intPenWidth / 2 + 1, intPenWidth, intPenWidth), 269, 91);
                    linePath.AddArc(new Rectangle(intPenWidth / 2, this.Height - intPenWidth - intPenWidth / 2 - 1, intPenWidth, intPenWidth), 181, -91);
                    break;
                case PipeStyle.Vertical_Right_Left:
                    path.AddLine(this.Width, 0, this.Width, this.Height - intPenWidth);
                    path.AddArc(new Rectangle(-1 * intPenWidth, this.Height - intPenWidth * 2, intPenWidth * 2, intPenWidth * 2), 0, 90);
                    path.AddLine(0, this.Height, 0, intPenWidth);
                    path.AddArc(new Rectangle(-1, 0, intPenWidth * 2, intPenWidth * 2), 180, 90);
                    path.CloseAllFigures();

                    linePath.AddArc(new Rectangle(intPenWidth / 2, intPenWidth / 2 + 1, intPenWidth, intPenWidth), 271, -91);
                    linePath.AddArc(new Rectangle(-1 * intPenWidth / 2 - 1, this.Height - intPenWidth - intPenWidth / 2 - 1, intPenWidth, intPenWidth), -1, 91);
                    break;
                case PipeStyle.Vertical_Left_Left:
                    path.AddLine(this.Width, intPenWidth, this.Width, this.Height - intPenWidth);
                    path.AddArc(new Rectangle(-1 * intPenWidth, this.Height - intPenWidth * 2, intPenWidth * 2, intPenWidth * 2), 0, 90);
                    path.AddLine(0, this.Height, 0, 0);
                    path.AddArc(new Rectangle(-1 * intPenWidth, 0, intPenWidth * 2, intPenWidth * 2), 270, 90);
                    path.CloseAllFigures();

                    linePath.AddArc(new Rectangle(-1 * intPenWidth / 2 - 1, intPenWidth / 2 + 1, intPenWidth, intPenWidth), 269, 91);
                    linePath.AddArc(new Rectangle(-1 * intPenWidth / 2 - 1, this.Height - intPenWidth - intPenWidth / 2 - 1, intPenWidth, intPenWidth), -1, 91);
                    break;
                case PipeStyle.Vertical_Right_Right:
                    path.AddLine(this.Width, 0, this.Width, this.Height);
                    path.AddArc(new Rectangle(-1, this.Height - intPenWidth * 2, intPenWidth * 2, intPenWidth * 2), 90, 90);
                    path.AddLine(0, this.Height - intPenWidth, 0, intPenWidth);
                    path.AddArc(new Rectangle(-1, 0, intPenWidth * 2, intPenWidth * 2), 180, 90);
                    path.CloseAllFigures();

                    linePath.AddArc(new Rectangle(intPenWidth / 2, intPenWidth / 2 + 1, intPenWidth, intPenWidth), 271, -91);
                    linePath.AddArc(new Rectangle(intPenWidth / 2, this.Height - intPenWidth - intPenWidth / 2 - 1, intPenWidth, intPenWidth), 180, -91);
                    break;
            }
            //填充管道颜色
            g.FillPath(new SolidBrush(PipeColor), path);
            //渐变色
            int intCount = intPenWidth / 2 / 4;
            int intSplit = (255 - 100) / intCount;
            for (int i = 0; i < intCount; i++)
            {
                int _penWidth = intPenWidth / 2 - 4 * i;
                if (_penWidth <= 0)
                    _penWidth = 1;
                //画流动线外围的渐变色（浅白部分）
                g.DrawPath(new Pen(new SolidBrush(Color.FromArgb(40, Color.White.R, Color.White.G, Color.White.B)), _penWidth), linePath);
                if (_penWidth == 1)
                    break;
            }
            //液体的流动
            if (flowDirection != FlowDirection.None)
            {
                Pen p = new Pen(new SolidBrush(flowColor), flowWidth);
                //虚线的样式
                p.DashPattern = new float[] { flowLength, flowSpace };
                p.DashOffset = intLineLeft * (FlowDirection == FlowDirection.Forward ? -1 : 1);
                g.DrawPath(p, linePath);
            }
        }
    }

    /// <summary>
    /// 管道样式
    /// </summary>
    public enum PipeStyle
    {
        /// <summary>
        /// 直线 
        /// </summary>
        Horizontal_None_None,
        /// <summary>
        /// 左上
        /// </summary>
        Horizontal_Up_None,
        /// <summary>
        /// 左下
        /// </summary>
        Horizontal_Down_None,
        /// <summary>
        /// 右上
        /// </summary>
        Horizontal_None_Up,
        /// <summary>
        /// 右下
        /// </summary>
        Horizontal_None_Down,
        /// <summary>
        /// 左下右上
        /// </summary>
        Horizontal_Down_Up,
        /// <summary>
        /// 左上右下
        /// </summary>
        Horizontal_Up_Down,
        /// <summary>
        /// 左上，右上
        /// </summary>
        Horizontal_Up_Up,
        /// <summary>
        /// 左下右下
        /// </summary>
        Horizontal_Down_Down,

        /// <summary>
        /// 竖线
        /// </summary>
        Vertical_None_None,
        /// <summary>
        /// 上左
        /// </summary>
        Vertical_Left_None,
        /// <summary>
        /// 上右
        /// </summary>
        Vertical_Right_None,
        /// <summary>
        /// 下左
        /// </summary>
        Vertical_None_Left,
        /// <summary>
        /// 下右
        /// </summary>
        Vertical_None_Right,
        /// <summary>
        /// 上左下右
        /// </summary>
        Vertical_Left_Right,
        /// <summary>
        /// 上右下左
        /// </summary>
        Vertical_Right_Left,
        /// <summary>
        /// 上左下左
        /// </summary>
        Vertical_Left_Left,
        /// <summary>
        /// 上右下右
        /// </summary>
        Vertical_Right_Right,
    }

    /// <summary>
    /// 流动方向
    /// </summary>
    public enum FlowDirection
    {
        None,
        /// <summary>
        /// 向后
        /// </summary>
        Forward,
        /// <summary>
        /// 向前
        /// </summary>
        Backward
    }
}