using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Drawing;
using System.Data;
using System.Linq;
using System.Text;
using System.Windows.Forms;

namespace laserPTZ.Controls
{
    public partial class HalfCoordinateUc : UserControl
    {
        [Category("wyl")]
        [Description("角度值")]
        public float value = 0;

        /// <summary>
        /// 定义该仪表盘画布的最大值为371
        /// </summary>
        private int maxSize = 371;

        /// <summary>
        /// 仪表盘画布的放大倍数，默认1
        /// </summary>
        private float multiple = 1;

        /// <summary>
        /// 定义轴线长度
        /// </summary>
        private float diameter;

        /// <summary>
        /// 每个间隔值
        /// </summary>
        private int intervalValue;

        /// <summary>
        /// 仪表盘显示的最小值，默认为0
        /// </summary>
        private float minValue = 0;

        /// <summary>
        /// 仪表盘显示的最小值
        /// </summary>
        [Category("wyl")]
        [Description("仪表盘显示的最小值")]
        public float MinValue
        {
            get
            {
                return minValue;
            }
            set
            {
                if (value >= MaxValue)
                {
                    MessageBox.Show("最小值不能超过最大值！", "警告", MessageBoxButtons.OK, MessageBoxIcon.Warning);
                    minValue = 0;
                }
                else
                {
                    minValue = value;
                    //drawBackImage();
                }
            }

        }

        /// <summary>
        /// 仪表盘上显示的最大值，默认123。
        /// </summary>
        private float maxValue = 123;

        /// <summary>
        /// 仪表盘上显示的最大值
        /// </summary>
        [Category("wyl")]
        [Description("仪表盘上显示的最大值")]
        public float MaxValue
        {
            get
            {
                return maxValue;
            }
            set
            {
                if (value <= MinValue)
                {
                    MessageBox.Show("最大值不能低于最小值！", "警告", MessageBoxButtons.OK, MessageBoxIcon.Warning);
                    maxValue = 123;
                }
                else
                {
                    maxValue = value;
                    //drawBackImage();
                }
            }
        }

        // <summary>
        /// 仪表盘变换的值,默认为0；
        /// </summary>
        private float changeValue = 0;

        /// <summary>
        /// 仪表盘变换的值
        /// </summary>
        public float ChangeValue
        {
            get
            {
                return changeValue;
            }
            set
            {
                changeValue = value;
            }
        }

        /// <summary>
        /// 指针颜色
        /// </summary>
        private Color pinColor = Color.FromArgb(191, 148, 28);

        public Color PinColor
        {
            get
            {
                return pinColor;
            }
            set
            {
                pinColor = value;
            }
        }



        public HalfCoordinateUc()
        {
            InitializeComponent();
            //双缓存防止屏幕抖动
            this.SetStyle(ControlStyles.OptimizedDoubleBuffer | ControlStyles.AllPaintingInWmPaint | ControlStyles.DoubleBuffer, true);
            this.SetStyle(ControlStyles.UserPaint, true);
            this.UpdateStyles();
            //设置背景颜色为透明
            this.BackColor = Color.Transparent;

            InitialCanvas();
        }

        //private int uintfontsize = 40;
        /// <summary>
        /// 初始化仪表盘画布
        /// </summary>
        private void InitialCanvas()
        {
            //对比控件的长高，以最小值为轴线长度
            if (this.Width > this.Height)
            {
                diameter = this.Height - 30;
            }
            else
            {
                diameter = this.Width - 30;
            }

            intervalValue = (int)(diameter / 3);//计算每个间隔之间的值

        }

        /// <summary>
        /// 画图
        /// </summary>
        /// <param name="g"></param>
        private void DrawPin(Graphics g)
        {
            Bitmap bit = new Bitmap(this.Width, this.Height);
            Graphics gp = Graphics.FromImage(bit);

            gp.DrawLine(new Pen(Color.FromArgb(139, 129, 76)), new Point(16, this.Height / 2), new Point(this.Width/2, this.Height / 2));

            gp.DrawLine(new Pen(Color.FromArgb(139, 129, 76)), new Point(this.Width / 2, 16), new Point(this.Width / 2, this.Height - 16));

            //Color color = Color.FromArgb(139, 129, 76);
            Color color = Color.RoyalBlue;
            SolidBrush brush = new SolidBrush(color);
            Font scaleFont = new Font(new FontFamily("微软雅黑"), 9, FontStyle.Regular);
            gp.DrawString("0°", scaleFont, brush, new Point(0, this.Height / 2 - 8));
            gp.DrawString("90°", scaleFont, brush, new Point(this.Width / 2 - 13, 0));         
            gp.DrawString("-90°", scaleFont, brush, new Point(this.Width / 2 - 19, this.Height - 14));

            int inter = 20;//圆圈之间的间隔
            Rectangle Rec = new Rectangle(16 + 5, 16 + 5, this.Width - 16 - 16 - 5 * 2, this.Height - 16 - 16 - 5 * 2);
            //使用DrawArc方法绘制圆弧，起点角度45度，结束角度260度
            gp.DrawArc(new Pen(Color.FromArgb(139, 129, 76)), Rec, 90, 180);
            Rec = new Rectangle(16 + 5 + inter, 16 + 5 + inter, this.Width - 16 - 16 - 5 * 2 - inter * 2, this.Height - 16 - 16 - 5 * 2 - inter * 2);
            gp.DrawArc(new Pen(Color.FromArgb(139, 129, 76)), Rec, 90, 180);
            Rec = new Rectangle(16 + 5 + inter *2, 16 + 5 + inter * 2, this.Width - 16 - 16 - 5 * 2 - inter * 4, this.Height - 16 - 16 - 5 * 2 - inter * 4);
            gp.DrawArc(new Pen(Color.FromArgb(139, 129, 76)), Rec, 90, 180);


            double fc = Math.Cos((value * (Math.PI)) / 180);
            double fs = Math.Sin((value * (Math.PI)) / 180);
            int r = (this.Width - 16 - 26 - 5 * 2) / 2;
            int x = this.Width / 2 - 5 - (int)(fc * r);
            int y = this.Height / 2 - (int)(fs * r);
            gp.DrawLine(new Pen(Color.LawnGreen, 1), new Point(this.Width / 2 - 5, this.Height / 2), new Point(x, y));


            g.DrawImage(bit, 0, 0);
            gp.Dispose();

        }


        private void HalfCoordinateUc_Load(object sender, EventArgs e)
        {
            InitialCanvas();
        }

        private void HalfCoordinateUc_Paint(object sender, PaintEventArgs e)
        {
            DrawPin(e.Graphics);
        }

        private void HalfCoordinateUc_Resize(object sender, EventArgs e)
        {
            InitialCanvas();
        }
    }
}