using System;
using System.Windows.Forms;

namespace PaintDotNet.CustomControl
{
    public partial class NumberParamControl : UserControl
    {
        /// <summary>
        /// 参数的index
        /// </summary>
        public int paramIndex;

        /// <summary>
        /// 参数值改变
        /// </summary>
        public event EventHandler ValueChanged;

        /// <summary>
        /// 是否是奇数类型的参数
        /// </summary>
        public bool isOddNumber;

        /// <summary>
        /// 设置奇数类型
        /// </summary>
        public bool IsOddNumber
        {
            //get
            //{
            //    return this.isOddNumber;
            //}
            set
            {
                this.isOddNumber = value;
                if (this.isOddNumber)
                {
                    this.sliderR.Maximum = (int)(this.sliderR.Maximum - this.sliderR.Minimum) / 2 + this.sliderR.Minimum;
                }
            }
        }

        /// <summary>
        /// 十进制位数
        /// </summary>
        public int DecimalPlaces
        {
            get
            {
                
                return this.numericUpDownR.DecimalPlaces;
            }
            set
            {
                this.numericUpDownR.DecimalPlaces = value;
                this.numericUpDownR.Increment = (decimal)Math.Pow(0.1, DecimalPlaces);
            }
        }

        public int Increment
        {
            set
            {
                this.sliderR.TickFrequency = value;
                this.numericUpDownR.Increment = value;
            }
        }

        /// <summary>
        /// 根据十进制位数获取slider的放大倍数
        /// </summary>
        public double magnification
        {
            get
            {
                return Math.Pow(10, DecimalPlaces);
            }
        }

        public double Maximum
        {
            //get
            //{
            //    return this.sliderR.Maximum / magnification;
            //}
            set
            {
                if (this.isOddNumber)
                {
                    this.sliderR.Maximum = (int)(value * magnification - this.sliderR.Minimum) / 2 + this.sliderR.Minimum;
                }
                else
                {
                    this.sliderR.Maximum = (int)(value * magnification);
                }
                this.numericUpDownR.Maximum = (Decimal)value;
            }
        }
        public double Minimum
        {
            get
            {
                return this.sliderR.Minimum / magnification;
            }
            set
            {
                this.sliderR.Minimum = (int)(value * magnification);
                this.numericUpDownR.Minimum = (decimal)value;
            }
        }

        public double Value
        {
            get
            {
                if (this.isOddNumber)
                {
                    return (double)(((this.sliderR.Value / magnification) - this.sliderR.Minimum) * 2 + this.sliderR.Minimum);// ((this.sliderR.Value / magnification) - this.sliderR.Minimum) / 2 + this.sliderR.Minimum;
                }
                else
                {
                    return (double)(this.sliderR.Value / magnification);
                }
            }
            set
            {
                if (this.isOddNumber)
                {
                    this.sliderR.Value = ((int)(value * magnification) - this.sliderR.Minimum) / 2 + this.sliderR.Minimum;
                }
                else
                {
                    this.sliderR.Value = (int)(value * magnification);
                }
                this.numericUpDownR.Value = (decimal)value;
            }
        }

        public NumberParamControl()
        {
            InitializeComponent();

            ResetUIRanges();
        }

        protected void ResetUIRanges()
        {
            this.sliderR.Minimum = 0;
            if (this.isOddNumber)
            {
                this.sliderR.Maximum = (int)(255 - this.sliderR.Minimum) / 2 + this.sliderR.Minimum;
            }
            else
            {
                this.sliderR.Maximum = 255;
            }
            this.sliderR.SmallChange = 1;

            this.numericUpDownR.Minimum = 0;
            this.numericUpDownR.Maximum = 255;
            this.numericUpDownR.Increment = 1;
            this.numericUpDownR.DecimalPlaces = 0;
        }
        private void sliderR_Scroll(object sender, EventArgs e)
        {
            if (this.isOddNumber)
            {
                numericUpDownR.Value = (decimal)(((this.sliderR.Value / magnification) - this.sliderR.Minimum) * 2 + this.sliderR.Minimum);
            }
            else
            {
                numericUpDownR.Value = (decimal)(sliderR.Value / magnification);
            }
            if (this.ValueChanged != null)
            {
                this.ValueChanged(this, e);
            }
        }

        private void numericUpDownR_ValueChanged(object sender, EventArgs e)
        {
            if (this.isOddNumber)
            {
                if (numericUpDownR.Value % 2 == 0)
                {
                    numericUpDownR.Value -= 1;
                    return;
                }
                sliderR.Value = ((int)(numericUpDownR.Value * (decimal)magnification) - this.sliderR.Minimum) / 2 + this.sliderR.Minimum;
            }
            else
            {
                sliderR.Value = (int)(numericUpDownR.Value * (decimal)magnification);
            }
            if (this.ValueChanged != null)
            {
                this.ValueChanged(this, e);
            }
        }
    }
}