圖形類（四）

//*************************************************************************************************
//完成日期： 2004-11-13
//作者：     何利民
//程序功能： 繪制餅狀圖表
//*************************************************************************************************
using System;
using System.Drawing;
using System.Drawing.Text;
using System.Drawing.Imaging;
using System.Drawing.Drawing2D;
using System.ComponentModel;

namespace ImagesSpaceName
{

    public class DrawEllipse : ImageArea
    {

        定義類變量#region 定義類變量

        protected string _pictureTitle = "冷風.net制作";            //圖片標題
        protected string _pictureTitleColor = "#000000";            //圖片標題顏色
        protected string _pictureTitleFamily = "新細明體";            //圖片標題字體名稱
        protected int _pictureTitleSize = 14;                        //圖片標題大小
        protected ImagesSpaceName.Valign _pictureTitleValign = ImagesSpaceName.Valign.top;    //圖片標題顯示垂直方向位置
        protected ImagesSpaceName.Align _pictureTitleAlign = ImagesSpaceName.Align.center;    //圖片標題顯示橫向位置

        protected bool _smallShow = true;                            //是否顯示右上角小矩形
        protected int _smallWidth = 20;                                //右上角小矩形的寬度
        protected int _smallHeight = 10;                            //右上角小矩形的高度

        #endregion

        初使化購造函數#region 初使化購造函數

        public DrawEllipse()
        {
        }

        #endregion

        定義屬性#region 定義屬性
            
        [
        Bindable(true),
        Category("drawing"),
        DefaultValue(ImagesSpaceName.WaterTitle.bottom),
        Description("獲得或設置圖標標題")
        ]
        public virtual string PictureTitle
        {
            get{return _pictureTitle;}
            set{_pictureTitle = value;}
        }

        [
        Bindable(true),
        Category("drawing"),
        DefaultValue(ImagesSpaceName.WaterTitle.bottom),
        Description("獲得或設置圖標標題顏色")
        ]
        public virtual string PictureTitleColor
        {
            get{return _pictureTitleColor;}
            set{_pictureTitleColor = value;}
        }

        [
        Bindable(true),
        Category("drawing"),
        DefaultValue(ImagesSpaceName.WaterTitle.bottom),
        Description("獲得或設置圖標標題字體名稱")
        ]
        public virtual string PictureTitleFamily
        {
            get{return _pictureTitleFamily;}
            set{_pictureTitleFamily = value;}
        }

        [
        Bindable(true),
        Category("drawing"),
        DefaultValue(ImagesSpaceName.WaterTitle.bottom),
        Description("獲得或設置圖標標題大小")
        ]
        public virtual int PictureTitleSize
        {
            get{return _pictureTitleSize;}
            set{_pictureTitleSize = value;}
        }

        [
        Bindable(true),
        Category("drawing"),
        DefaultValue(ImagesSpaceName.WaterTitle.bottom),
        Description("獲得或設置圖標標題垂直對齊")
        ]
        public virtual ImagesSpaceName.Valign PictureTitleValign
        {
            get{return _pictureTitleValign;}
            set{_pictureTitleValign = value;}
        }

        [
        Bindable(true),
        Category("drawing"),
        DefaultValue(ImagesSpaceName.WaterTitle.bottom),
        Description("獲得或設置圖標標題水平對齊")
        ]
        public virtual ImagesSpaceName.Align PictureTitleAlign
        {
            get{return _pictureTitleAlign;}
            set{_pictureTitleAlign = value;}
        }

        [
        Bindable(true),
        Category("drawing"),
        DefaultValue(ImagesSpaceName.WaterTitle.bottom),
        Description("獲得或設置右上角小矩形的寬度")
        ]
        public virtual int SmallWidth
        {
            get{return _smallWidth;}
            set{_smallWidth = value;}
        }

        [
        Bindable(true),
        Category("drawing"),
        DefaultValue(ImagesSpaceName.WaterTitle.bottom),
        Description("獲得或設置右上角小矩形的高度")
        ]
        public virtual int SmallHeight
        {
            get{return _smallHeight;}
            set{_smallHeight = value;}
        }

        [
        Bindable(true),
        Category("drawing"),
        DefaultValue(ImagesSpaceName.WaterTitle.bottom),
        Description("獲得或設置右上角小矩形顯示與否")
        ]
        public virtual bool SmallShow
        {
            get{return _smallShow;}
            set{_smallShow = value;}
        }

        #endregion

        繪制標題 void DrawTitle()#region 繪制標題 void DrawTitle()

        private void DrawTitle()
        {
            int x = 0;
            int y = 0;
            graphics.TextRenderingHint = TextRenderingHint.AntiAliasGridFit;
            Font font = new Font(PictureTitleFamily,PictureTitleSize);
            SizeF sizeF = graphics.MeasureString(PictureTitle,font);
            if(PictureTitleValign==ImagesSpaceName.Valign.bottom)
                y = (int)Height- (int)sizeF.Height;
            if(PictureTitleAlign==ImagesSpaceName.Align.center)
                x = ((int)Width-(int)sizeF.Width)/2;
            else if(PictureTitleAlign==ImagesSpaceName.Align.right)
                x = (int)Width-(int)sizeF.Width;
            graphics.DrawString(PictureTitle,font,new SolidBrush(ColorTranslator.FromHtml(PictureTitleColor)),x,y);
        }

        #endregion

        繪制右上角的小矩形#region 繪制右上角的小矩形

        /**//// <param name="arrayX">橫坐標數據</param>
        private void DrawSmallRectangle(string[] arrayX)
        {
            Point pos = new Point((int)Width-Margin_Right,Margin_Top);    //取得基點
            Pen pen = new Pen(new SolidBrush(Color.Black),1);
            Font font = new Font("新細明體",12);
            int posY = pos.Y;
            for(int i=0; i<arrayX.Length; i++)
            {
                graphics.DrawRectangle(pen,pos.X,posY,SmallWidth,SmallHeight);
                Color color = GetColor(i);
                graphics.FillRectangle(new SolidBrush(color),pos.X,posY,SmallWidth,SmallHeight);
                graphics.DrawString(arrayX[i],font,new SolidBrush(color),pos.X+SmallWidth+5,posY);
                posY += SmallHeight+20;
            }
        }

        #endregion

        旋轉指定的字體void RotateFont(string, int, int, int)#region 旋轉指定的字體void RotateFont(string, int, int, int)
        private Bitmap RotateFont(string str, int du, int w, int h)
        {
            Bitmap b = new Bitmap(w,h);
            Graphics g = Graphics.FromImage(b);
            g.Clear(Color.Black);
            g.SmoothingMode = SmoothingMode.AntiAlias;
            g.RotateTransform(du);
            Brush brush=Brushes.Red;
            Font font = new Font("宋体", 14);
            g.DrawString(str,font,brush,0,0);
            g.ResetTransform();
            b.MakeTransparent(Color.Black);
            return b;
        }
        #endregion 

        繪圖#region 繪圖

        /**//// <param name="arrayX">橫坐標數據</param>
        /// <param name="arrayY">昱坐標數據</param>
        private void Drawing(string[] arrayX, int[] arrayY)
        {

            if(BgGround==null)
            {
                bitmap = new Bitmap((int)Width,(int)Height);
                graphics = Graphics.FromImage(bitmap);
                graphics.Clear(ColorTranslator.FromHtml(BgColor));
            }
            else
            {
                Bitmap img = new Bitmap(BgGround);
                if(BgGroundAlpha<250) img = ImageAlpha(img,ColorTranslator.FromHtml(BgColor),BgGroundAlpha);
                bitmap = new Bitmap(img,(int)Width,(int)Height);
                graphics = Graphics.FromImage(bitmap);
            }

            SetDrawArea();        //設置繪圖區
            DrawingRuler();        //顯示坐標
            DrawingGrid(arrayY);//繪制網格
            DrawTitle();        //繪制標題
            if(SmallShow) DrawSmallRectangle(arrayX);    //繪制右上角小圖標

            //繪扇形
            float iTotalValues = 0;    //共多少值
            float iCurAngle=0;        //當前度數
            float iStartAngle = 0;    //開始位置
            int iXlen =(int)Width-Margin_Right-Margin_Left;        //繪制的扇形所在的矩形寬
            int iYlen = (int)Height-Margin_Top-Margin_Bottom;    //繪制的扇形所在的矩形高
            for(int i=0; i<arrayY.Length; i++)
            {
                iTotalValues += arrayY[i];
            }
            for(int i=0; i<arrayY.Length; i++)
            {
                iCurAngle = arrayY[i]/iTotalValues*360;
                graphics.FillPie(new SolidBrush(GetColor(i)),Margin_Left,Margin_Top,iXlen,iYlen,iStartAngle,iCurAngle);
                graphics.DrawPie(Pens.Black,Margin_Left,Margin_Top,iXlen,iYlen,iStartAngle,iCurAngle);
                //Bitmap b = RotateFont(arrayX[i],(int)(iStartAngle),iXlen,iYlen);
                //Rectangle rec = new Rectangle(MarginLeft,MarginTop,iXlen,iYlen);
                //graphics.DrawImage(b,rec,0,0,iXlen,iYlen,GraphicsUnit.Pixel);
                iStartAngle += iCurAngle;
            }
            /**//*
            iCurAngle=0;        //當前度數
            iStartAngle = 0;    //開始位置
            for(int i=0; i<arrayY.Length; i++)
            {
                iCurAngle = arrayY[i]/iTotalValues*360;
                Bitmap b = RotateFont(arrayX[i],(int)(iStartAngle),iXlen,iYlen);
                Rectangle rec = new Rectangle(Margin_Left+iXlen/2,Margin_Top+iYlen/2,iXlen/2,iYlen/2);
                graphics.DrawImage(b,rec,0,0,iXlen/2,iYlen/2,GraphicsUnit.Pixel);
                iStartAngle += iCurAngle;
                iStartAngle += iCurAngle;
            }
            */
            if(Alpha<250) bitmap = ImageAlpha(bitmap,ColorTranslator.FromHtml(BgColor),Alpha);
            this.SaveImage(bitmap,ImageFormat.Jpeg);
        }

        #endregion

        調用#region 調用
        /**//// <param name="arrayX">橫坐標數據</param>
        /// <param name="arrayY">昱坐標數據</param>
        public void CreateEllipse(string[] arrayX, int[] arrayY)
        {
            Drawing(arrayX,arrayY);
        }

        /**//// <param name="table">數據表</param>
        /// <param name="x">X軸數據在數據表中的字段序號</param>
        /// <param name="y">Y軸數據在數據表中的字段序號</param>
        public void CreateEllipse(System.Data.DataTable table, int x, int y)
        {
            try
            {
                int iMax = table.Rows.Count;
                string[] arrayX = new string[iMax];
                int[] arrayY = new int[iMax];
                for(int i=0; i<iMax; i++)
                {
                    arrayX[i] = table.Rows[i][x].ToString();
                    arrayY[i] = (int)float.Parse(table.Rows[i][y].ToString());
                }
                Drawing(arrayX,arrayY);
            }
            catch
            {
                throw new Exception("提供數據表中的數據不對!");
            }
        }

        /**//// <param name="collection">集合</param>
        public void CreateEllipse(System.Collections.Specialized.NameValueCollection collection)
        {
            try
            {
                int iMax = collection.Count;
                string[] arrayX = new string[iMax];
                int[] arrayY = new int[iMax];
                for(int i=0; i<iMax; i++)
                {
                    arrayX[i] = collection.GetKey(i).ToString();
                    arrayY[i] = (int)float.Parse(collection.GetValues(i).ToString());
                }
                Drawing(arrayX,arrayY);
            }
            catch
            {
                throw new Exception("提供集合中的數據表不對!");
            }
        }

        /**//// <param name="ht">哈希表</param>
        public void CreateEllipse(System.Collections.Hashtable ht)
        {
            try
            {
                int iMax = ht.Count;
                string[] arrayX = new string[iMax];
                int[] arrayY = new int[iMax];
                System.Collections.IDictionaryEnumerator myEnumerator = ht.GetEnumerator();
                int i = 0;
                while(myEnumerator.MoveNext())
                {
                    arrayX[i] = myEnumerator.Key.ToString();
                    arrayY[i] = (int)float.Parse(myEnumerator.Value.ToString());
                    i++;
                }
                Drawing(arrayX,arrayY);
            }
            catch
            {
                throw new Exception("提Hashtable中的數據不對!");
            }
        }

        #endregion

    }
}