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


namespace LYFZ.ComponentLibrary
{
    [Designer(typeof(ScrollbarControlDesigner))]
    public class CtlScrollBarH : UserControl
    {
        protected Color moChannelColor = Color.Empty;
        protected Image moUpArrowImage = null;
        protected Image moDownArrowImage = null;
        protected Image moThumbArrowImage = null;

        protected Image moThumbTopImage = null;
        protected Image moThumbTopSpanImage = null;
        protected Image moThumbBottomImage = null;
        protected Image moThumbBottomSpanImage = null;
        protected Image moThumbMiddleImage = null;

        protected int moLargeChange = 10;
        protected int moSmallChange = 1;
        protected int moMinimum = 0;
        protected int moMaximum = 100;
        protected int moValue = 0;
        private int nClickPoint;

        protected int moThumbTop = 0;

        protected bool moAutoSize = false;

        private bool moThumbDown = false;
        private bool moThumbDragging = false;

        public new event EventHandler Scroll = null;
        public event EventHandler ValueChanged = null;

        private int GetThumbWidth()
        {
            int nTrackWidth = (this.Width - (UpArrowImage.Width + DownArrowImage.Width));
            float fThumbWidth = ((float)LargeChange / (float)Maximum) * nTrackWidth;
            int nThumbWidth = (int)fThumbWidth;

            if (nThumbWidth > nTrackWidth)
            {
                nThumbWidth = nTrackWidth;
                fThumbWidth = nTrackWidth;
            }
            if (nThumbWidth < 56)
            {
                nThumbWidth = 56;
                fThumbWidth = 56;
            }

            return nThumbWidth;
        }

        public CtlScrollBarH()
        {
            InitializeComponent();
            SetStyle(ControlStyles.ResizeRedraw, true);
            SetStyle(ControlStyles.AllPaintingInWmPaint, true);
            SetStyle(ControlStyles.DoubleBuffer, true);

            moChannelColor = Color.FromArgb(194, 211, 255);
            UpArrowImage = LYFZ.ComponentLibrary.Properties.Resources.leftarrow;
            DownArrowImage = LYFZ.ComponentLibrary.Properties.Resources.rightarrow;


            ThumbBottomImage = LYFZ.ComponentLibrary.Properties.Resources.ThumbRight;
            ThumbBottomSpanImage = LYFZ.ComponentLibrary.Properties.Resources.ThumbSpanRight;
            ThumbTopImage = LYFZ.ComponentLibrary.Properties.Resources.ThumbLeft;
            ThumbTopSpanImage = LYFZ.ComponentLibrary.Properties.Resources.ThumbSpanLeft;
            //ThumbMiddleImage = Resource.ThumbMiddle;
            ThumbMiddleImage = LYFZ.ComponentLibrary.Properties.Resources.ThumbMiddleH;

            this.Height = UpArrowImage.Height;
            base.MinimumSize = new Size(86,this.Height);

        }

        protected override void OnPaint(PaintEventArgs e)
        {
            e.Graphics.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.NearestNeighbor;

            if (UpArrowImage != null)
            {
                //e.Graphics.DrawImage(UpArrowImage, new Rectangle(new Point(0, 0), new Size(this.Height, UpArrowImage.Width)));
                e.Graphics.DrawImage(UpArrowImage, new Rectangle(new Point(0, 0), new Size(UpArrowImage.Width, this.Height)));
            }

            Brush oBrush = new SolidBrush(moChannelColor);
            Brush oWhiteBrush = new SolidBrush(Color.FromArgb(255, 255, 255));

            //draw channel left and right border colors
            //e.Graphics.FillRectangle(oWhiteBrush, new Rectangle(0, UpArrowImage.Width, 1, (this.Width - DownArrowImage.Width)));
            //e.Graphics.FillRectangle(oWhiteBrush, new Rectangle(this.Height - 1, UpArrowImage.Width, 1, (this.Width - DownArrowImage.Width)));
            e.Graphics.FillRectangle(oWhiteBrush, new Rectangle(UpArrowImage.Width, 0, (this.Width - DownArrowImage.Width), 1));
            e.Graphics.FillRectangle(oWhiteBrush, new Rectangle(UpArrowImage.Width, this.Height - 1, (this.Width - DownArrowImage.Width), 1));

            //draw channel
            //e.Graphics.FillRectangle(oBrush, new Rectangle(1, UpArrowImage.Width, this.Height - 2, (this.Width - DownArrowImage.Width)));
            e.Graphics.FillRectangle(oBrush, new Rectangle(UpArrowImage.Width, 1, (this.Width - DownArrowImage.Width), this.Height - 2));

            //draw thumb
            int nTrackWidth = (this.Width - (UpArrowImage.Width + DownArrowImage.Width));
            float fThumbWidth = ((float)LargeChange / (float)Maximum) * nTrackWidth;
            int nThumbWidth = (int)fThumbWidth;

            if (nThumbWidth > nTrackWidth)
            {
                nThumbWidth = nTrackWidth;
                fThumbWidth = nTrackWidth;
            }
            if (nThumbWidth < 56)
            {
                nThumbWidth = 56;
                fThumbWidth = 56;
            }

            //Debug.WriteLine(nThumbWidth.ToString());

            float fSpanWidth = (fThumbWidth - (ThumbMiddleImage.Width + ThumbTopImage.Width + ThumbBottomImage.Width)) / 2.0f;
            int nSpanWidth = (int)fSpanWidth;

            int nTop = moThumbTop;
            nTop += UpArrowImage.Width;

            //draw top
            //e.Graphics.DrawImage(ThumbTopImage, new Rectangle(1, nTop, this.Height - 2, ThumbTopImage.Width));
            e.Graphics.DrawImage(ThumbTopImage, new Rectangle(nTop, 1, ThumbTopImage.Width, this.Height - 2));

            nTop += ThumbTopImage.Width;
            //draw top span
            Rectangle rect = new Rectangle(1, nTop, this.Height - 2, nSpanWidth);

            //e.Graphics.DrawImage(ThumbTopSpanImage, 1.0f, (float)nTop, (float)this.Height - 2.0f, (float)fSpanWidth * 2);
            e.Graphics.DrawImage(ThumbTopSpanImage, (float)nTop, 1.0f, (float)fSpanWidth * 2, (float)this.Height - 2.0f);

            nTop += nSpanWidth;
            //draw middle
            //e.Graphics.DrawImage(ThumbMiddleImage, new Rectangle(1, nTop, this.Height - 2, ThumbMiddleImage.Width));
            e.Graphics.DrawImage(ThumbMiddleImage, new Rectangle(nTop, 1, ThumbMiddleImage.Width, this.Height - 2));


            nTop += ThumbMiddleImage.Width;
            //draw top span
            //rect = new Rectangle(1, nTop, this.Height - 2, nSpanWidth * 2);
            rect = new Rectangle(nTop, 1, nSpanWidth * 2, this.Height - 2);
            e.Graphics.DrawImage(ThumbBottomSpanImage, rect);

            nTop += nSpanWidth;
            //draw bottom
            //e.Graphics.DrawImage(ThumbBottomImage, new Rectangle(1, nTop, this.Height - 2, nSpanWidth));
            e.Graphics.DrawImage(ThumbBottomImage, new Rectangle(nTop, 1, nSpanWidth, this.Height - 2));

            if (DownArrowImage != null)
            {
                //e.Graphics.DrawImage(DownArrowImage, new Rectangle(new Point(0, (this.Width - DownArrowImage.Width)), new Size(this.Height, DownArrowImage.Width)));
                e.Graphics.DrawImage(DownArrowImage, new Rectangle(new Point((this.Width - DownArrowImage.Width), 0), new Size(DownArrowImage.Width, this.Height)));
            }

        }

        public override bool AutoSize
        {
            get
            {
                return base.AutoSize;
            }
            set
            {
                base.AutoSize = value;
                if (base.AutoSize)
                {
                    this.Height = moUpArrowImage.Height;
                }
            }
        }

        private void InitializeComponent()
        {
            this.SuspendLayout();
            // 
            // CustomScrollbar
            // 
            this.Name = "CustomScrollbar";
            this.Size = new System.Drawing.Size(200, 200);
            this.MouseDown += new System.Windows.Forms.MouseEventHandler(this.CustomScrollbar_MouseDown);
            this.MouseMove += new System.Windows.Forms.MouseEventHandler(this.CustomScrollbar_MouseMove);
            this.MouseUp += new System.Windows.Forms.MouseEventHandler(this.CustomScrollbar_MouseUp);
            this.ResumeLayout(false);

        }

        private void CustomScrollbar_MouseDown(object sender, MouseEventArgs e)
        {
            Point ptPoint = this.PointToClient(Cursor.Position);
            int nTrackWidth = (this.Width - (UpArrowImage.Width + DownArrowImage.Width));
            float fThumbWidth = ((float)LargeChange / (float)Maximum) * nTrackWidth;
            int nThumbWidth = (int)fThumbWidth;

            if (nThumbWidth > nTrackWidth)
            {
                nThumbWidth = nTrackWidth;
                fThumbWidth = nTrackWidth;
            }
            if (nThumbWidth < 56)
            {
                nThumbWidth = 56;
                fThumbWidth = 56;
            }

            int nTop = moThumbTop;
            nTop += UpArrowImage.Width;


            Rectangle thumbrect = new Rectangle(new Point(nTop,1 ), new Size(nThumbWidth,ThumbMiddleImage.Height ));
            if (thumbrect.Contains(ptPoint))
            {

                //hit the thumb
                nClickPoint = (ptPoint.X - nTop);
                this.moThumbDown = true;
            }

            Rectangle uparrowrect = new Rectangle(new Point(0,1 ), new Size(UpArrowImage.Width,UpArrowImage.Height ));
            if (uparrowrect.Contains(ptPoint))
            {

                int nRealRange = (Maximum - Minimum) - LargeChange;
                int nPixelRange = (nTrackWidth - nThumbWidth);
                if (nRealRange > 0)
                {
                    if (nPixelRange > 0)
                    {
                        if ((moThumbTop - SmallChange) < 0)
                            moThumbTop = 0;
                        else
                            moThumbTop -= SmallChange;

                        //figure out value
                        float fPerc = (float)moThumbTop / (float)nPixelRange;
                        float fValue = fPerc * (Maximum - LargeChange);

                        moValue = (int)fValue;
                        Debug.WriteLine(moValue.ToString());

                        if (ValueChanged != null)
                            ValueChanged(this, new EventArgs());

                        if (Scroll != null)
                            Scroll(this, new EventArgs());

                        Invalidate();
                    }
                }
            }

            Rectangle downarrowrect = new Rectangle(new Point(UpArrowImage.Width + nTrackWidth,1 ), new Size(UpArrowImage.Width,UpArrowImage.Height ));
            if (downarrowrect.Contains(ptPoint))
            {
                int nRealRange = (Maximum - Minimum) - LargeChange;
                int nPixelRange = (nTrackWidth - nThumbWidth);
                if (nRealRange > 0)
                {
                    if (nPixelRange > 0)
                    {
                        if ((moThumbTop + SmallChange) > nPixelRange)
                            moThumbTop = nPixelRange;
                        else
                            moThumbTop += SmallChange;

                        //figure out value
                        float fPerc = (float)moThumbTop / (float)nPixelRange;
                        float fValue = fPerc * (Maximum - LargeChange);

                        moValue = (int)fValue;
                        Debug.WriteLine(moValue.ToString());

                        if (ValueChanged != null)
                            ValueChanged(this, new EventArgs());

                        if (Scroll != null)
                            Scroll(this, new EventArgs());

                        Invalidate();
                    }
                }
            }
        }

        private void CustomScrollbar_MouseUp(object sender, MouseEventArgs e)
        {
            this.moThumbDown = false;
            this.moThumbDragging = false;
        }

        private void MoveThumb(int y)
        {
            int nRealRange = Maximum - Minimum;
            int nTrackWidth = (this.Width - (UpArrowImage.Width + DownArrowImage.Width));
            float fThumbWidth = ((float)LargeChange / (float)Maximum) * nTrackWidth;
            int nThumbWidth = (int)fThumbWidth;

            if (nThumbWidth > nTrackWidth)
            {
                nThumbWidth = nTrackWidth;
                fThumbWidth = nTrackWidth;
            }
            if (nThumbWidth < 56)
            {
                nThumbWidth = 56;
                fThumbWidth = 56;
            }

            int nSpot = nClickPoint;

            int nPixelRange = (nTrackWidth - nThumbWidth);
            if (moThumbDown && nRealRange > 0)
            {
                if (nPixelRange > 0)
                {
                    int nNewThumbTop = y - (UpArrowImage.Width + nSpot);

                    if (nNewThumbTop < 0)
                    {
                        moThumbTop = nNewThumbTop = 0;
                    }
                    else if (nNewThumbTop > nPixelRange)
                    {
                        moThumbTop = nNewThumbTop = nPixelRange;
                    }
                    else
                    {
                        moThumbTop = y - (UpArrowImage.Width + nSpot);
                    }

                    //figure out value
                    float fPerc = (float)moThumbTop / (float)nPixelRange;
                    float fValue = fPerc * (Maximum - LargeChange);
                    moValue = (int)fValue;
                    Debug.WriteLine(moValue.ToString());

                    Application.DoEvents();

                    Invalidate();
                }
            }
        }

        private void CustomScrollbar_MouseMove(object sender, MouseEventArgs e)
        {
            if (moThumbDown == true)
            {
                this.moThumbDragging = true;
            }

            if (this.moThumbDragging)
            {
                //MoveThumb(e.Y);
                MoveThumb(e.X);
            }

            if (ValueChanged != null)
                ValueChanged(this, new EventArgs());

            if (Scroll != null)
                Scroll(this, new EventArgs());
        }


        [EditorBrowsable(EditorBrowsableState.Always), Browsable(true), DefaultValue(false), Category("组件扩展属性"), Description("LargeChange")]
        public int LargeChange
        {
            get { return moLargeChange; }
            set
            {
                moLargeChange = value;
                Invalidate();
            }
        }

        [EditorBrowsable(EditorBrowsableState.Always), Browsable(true), DefaultValue(false), Category("组件扩展属性"), Description("SmallChange")]
        public int SmallChange
        {
            get { return moSmallChange; }
            set
            {
                moSmallChange = value;
                Invalidate();
            }
        }

        [EditorBrowsable(EditorBrowsableState.Always), Browsable(true), DefaultValue(false), Category("组件扩展属性"), Description("Minimum")]
        public int Minimum
        {
            get { return moMinimum; }
            set
            {
                moMinimum = value;
                Invalidate();
            }
        }

        [EditorBrowsable(EditorBrowsableState.Always), Browsable(true), DefaultValue(false), Category("组件扩展属性"), Description("Maximum")]
        public int Maximum
        {
            get { return moMaximum; }
            set
            {
                moMaximum = value;
                Invalidate();
            }
        }

        [EditorBrowsable(EditorBrowsableState.Always), Browsable(true), DefaultValue(false), Category("组件扩展属性"), Description("Value")]
        public int Value
        {
            get { return moValue; }
            set
            {
                moValue = value;

                int nTrackWidth = (this.Width - (UpArrowImage.Width + DownArrowImage.Width));
                float fThumbWidth = ((float)LargeChange / (float)Maximum) * nTrackWidth;
                int nThumbWidth = (int)fThumbWidth;

                if (nThumbWidth > nTrackWidth)
                {
                    nThumbWidth = nTrackWidth;
                    fThumbWidth = nTrackWidth;
                }
                if (nThumbWidth < 56)
                {
                    nThumbWidth = 56;
                    fThumbWidth = 56;
                }

                //figure out value
                int nPixelRange = nTrackWidth - nThumbWidth;
                int nRealRange = (Maximum - Minimum) - LargeChange;
                float fPerc = 0.0f;
                if (nRealRange != 0)
                {
                    fPerc = (float)moValue / (float)nRealRange;

                }

                float fTop = fPerc * nPixelRange;
                moThumbTop = (int)fTop;


                Invalidate();
            }
        }

        [EditorBrowsable(EditorBrowsableState.Always), Browsable(true), DefaultValue(false), Category("组件扩展属性"), Description("Channel Color")]
        public Color ChannelColor
        {
            get { return moChannelColor; }
            set { moChannelColor = value; }
        }

        [EditorBrowsable(EditorBrowsableState.Always), Browsable(true), DefaultValue(false), Category("组件扩展属性"), Description("Up Arrow Graphic")]
        public Image UpArrowImage
        {
            get { return moUpArrowImage; }
            set { moUpArrowImage = value; }
        }

        [EditorBrowsable(EditorBrowsableState.Always), Browsable(true), DefaultValue(false), Category("组件扩展属性"), Description("Up Arrow Graphic")]
        public Image DownArrowImage
        {
            get { return moDownArrowImage; }
            set { moDownArrowImage = value; }
        }

        [EditorBrowsable(EditorBrowsableState.Always), Browsable(true), DefaultValue(false), Category("组件扩展属性"), Description("Up Arrow Graphic")]
        public Image ThumbTopImage
        {
            get { return moThumbTopImage; }
            set { moThumbTopImage = value; }
        }

        [EditorBrowsable(EditorBrowsableState.Always), Browsable(true), DefaultValue(false), Category("组件扩展属性"), Description("Up Arrow Graphic")]
        public Image ThumbTopSpanImage
        {
            get { return moThumbTopSpanImage; }
            set { moThumbTopSpanImage = value; }
        }

        [EditorBrowsable(EditorBrowsableState.Always), Browsable(true), DefaultValue(false), Category("组件扩展属性"), Description("Up Arrow Graphic")]
        public Image ThumbBottomImage
        {
            get { return moThumbBottomImage; }
            set { moThumbBottomImage = value; }
        }

        [EditorBrowsable(EditorBrowsableState.Always), Browsable(true), DefaultValue(false), Category("组件扩展属性"), Description("Up Arrow Graphic")]
        public Image ThumbBottomSpanImage
        {
            get { return moThumbBottomSpanImage; }
            set { moThumbBottomSpanImage = value; }
        }

        [EditorBrowsable(EditorBrowsableState.Always), Browsable(true), DefaultValue(false), Category("组件扩展属性"), Description("Up Arrow Graphic")]
        public Image ThumbMiddleImage
        {
            get { return moThumbMiddleImage; }
            set { moThumbMiddleImage = value; }
        }

        
    }

    //internal class ScrollbarControlDesigner : System.Windows.Forms.Design.ControlDesigner
    //{
    //    public override SelectionRules SelectionRules
    //    {
    //        get
    //        {
    //            SelectionRules selectionRules = base.SelectionRules;
    //            PropertyDescriptor propDescriptor = TypeDescriptor.GetProperties(this.Component)["AutoSize"];
    //            if (propDescriptor != null)
    //            {
    //                bool autoSize = (bool)propDescriptor.GetValue(this.Component);
    //                if (autoSize)
    //                {
    //                    selectionRules = SelectionRules.Visible | SelectionRules.Moveable | SelectionRules.BottomSizeable | SelectionRules.TopSizeable;
    //                }
    //                else
    //                {
    //                    selectionRules = SelectionRules.Visible | SelectionRules.AllSizeable | SelectionRules.Moveable;
    //                }
    //            }
    //            return selectionRules;
    //        }
    //    }
    //}

}