[求助]自定义符号类的问题，总统及各位兄弟帮忙看看啦！

楼主^#

更多发布于：2008-09-16 17:29

我所作的一个自定义符号类以下,自定义符号是可以显示出来,但是总是要缩小到一到比例才显示出来,这是什么问题??是哪个接口哪个函数设置元素按比死显示的??(如果用默认的symbol是没有这个问题出现的),还有一个问题是有没有类似的自定义建立铁路符号的代码呀???:
//
//
//自定义元素类
public class cusFaSymbol : ICharacterMarkerSymbol, ISymbol , IClone, IPersistVariant
 {
 #region 变量
 
 private string p_type;
 private string p_zb;
 private string p_num;
 private float p_LSize;
 //private double p_dpi;
 //private ISimpleMarkerSymbol p_symbol;
 //private int p_labelAngle;
 private int m_lHDC;//句柄
 private stdole.IFontDisp font;//字体
 //private int m_lSize;
 
 private ESRI.ArcGIS.Display.IDisplayTransformation m_pDispTrans;
 
 private double m_Angle;
 private IColor m_Color;
 private double m_Size;
 private double m_XOffset;
 private double m_YOffset;
 private int m_CharacterIndex;
 private double m_dDeviceRatio;
 //private int m_lPen;
 //private int m_lOldPen;
 //private int m_lHDC;
 //private double m_Angle;
 //private int m_SymbolIndex;
 //private Size Size;
 esriRasterOpCode rop;
 
 
 #endregion
 #region ICone
 public void Assign(
 IClone src
) { }
 public IClone Clone(
) {
 return (IClone)this;
 }
 public bool IsEqual(
 IClone other
) {
 if (this.Equals(other) == true)
 return true;
 else
 return false;
 }
 public bool IsIdentical(
 IClone other
) { return IsEqual(other); }
 #endregion ICone
 #region IPersistVariant
 UID m_ID;
 public UID ID { get { return m_ID; } }
 void ESRI.ArcGIS.esriSystem.IPersistVariant.Load(ESRI.ArcGIS.esriSystem.IVariantStream Stream)
 {
 int lSavedVers = 0;
 lSavedVers = Convert.ToInt32(Stream.Read());
 if ((lSavedVers <= 0))
 {
 throw new Exception("Failed to read from stream");
 }
 
 if (lSavedVers == 1)
 {
 rop = (esriRasterOpCode)Stream.Read();
 
 m_Size = Convert.ToDouble(Stream.Read());
 m_XOffset = Convert.ToDouble(Stream.Read());
 m_YOffset = Convert.ToDouble(Stream.Read());
 m_Angle = Convert.ToDouble(Stream.Read());
 }
 }
 
 
 public void Save(
 IVariantStream Stream
) { }
 //extern void IPersistVariant.Save(ESRI.ArcGIS.esriSystem.IVariantStream Stream);
 ////{ }
 void ESRI.ArcGIS.esriSystem.IPersistVariant.Save(ESRI.ArcGIS.esriSystem.IVariantStream Stream)//:base(ESRI.ArcGIS.esriSystem.IVariantStream Stream)
 {
 //base.Save(Stream);
 }
 #endregion IPersistVariant
 
 // public void Assign(
 // IClone src
 //)
 // {
 // }
 
 public double Angle
 {
 get { return m_Angle; }
 set { m_Angle = value; }
 }
 //public int LabelAngle
 //{
 // get { return p_labelAngle; }
 // set { p_labelAngle = value; }
 //}
 
 public IColor Color
 {
 get { return m_Color; }
 set { m_Color = value; }
 }
 
 public double Size
 {
 get { return m_Size; }
 set { m_Size = value; }
 }
 
 public double XOffset
 {
 get { return m_XOffset; }
 set { m_XOffset = value; }
 }
 public double YOffset
 {
 get { return m_YOffset; }
 set { m_YOffset = value; }
 }
 public int CharacterIndex
 {
 get
 {
 return m_CharacterIndex;
 }
 set
 {
 m_CharacterIndex = value;
 }
 }
 public stdole.IFontDisp Font 
 {
 get
 {
 return font;
 }
 set
 {
 font = value;
 }
 }
 #region ICustomMarker 成员
 
 public cusFaSymbol(string _szType, string _szZb,
 string _szNum, float _fLSize)
 : base()
 {
 //base.MemberwiseClone();
 this.p_type = _szType;
 this.p_zb = _szZb;
 this.p_num = _szNum;
 //font = new stdole..StdFontClass();
 //this.p_labelAngle = labelAngle;
 if (_fLSize >= 6)
 {
 this.p_LSize = _fLSize;
 }
 else
 {
 this.p_LSize = 9;
 }
 //ROP2 = ESRI.ArcGIS.Display.esriRasterOpCode.esriROPCopyPen;
 //font = _font;
 //Class_Initialize_Renamed();
 }
 
 ~cusFaSymbol()
 {
 
 }
 
 
 
 
 public void ResetDC()
 {
 // TOD 添加cusFaSymbol.ResetDC 实现
 m_pDispTrans = null;
 m_lHDC = 0; 
 GC.Collect();
 }
 
 public void QueryBoundary(
 int hDC,
 ITransformation displayTransform,
 IGeometry Geometry,
 IPolygon boundary
 )
 {
 return;
 if (!(Geometry is ESRI.ArcGIS.Geometry.IPoint))
 return;
 boundary.SetEmpty();
 
 //Geometry.SpatialReference = 0;
 IPoint point = (IPoint)Geometry;
 IDisplayTransformation displayTransformation = (IDisplayTransformation)displayTransform;
 
 //QueryBoundsFromGeom(hDC, ref displayTransformation, ref Boundary, ref point);
 //displayTransformation.ReferenceScale = 0;
 }
 public esriRasterOpCode ROP2
 {
 get { return rop;}
 set { rop = value; }
 }
 //public void SetupDC(int hDC, double dpi, object pBaseSym)
 public void SetupDC
 (
 int hDC,
 ITransformation transformation
 )
 {
 // TOD 添加cusFaSymbol.SetupDC 实现
 //this.p_dpi = dpi;
 //this.p_symbol = (mo.Symbol)pBaseSym;
 m_lHDC = hDC;
 
 m_pDispTrans = (IDisplayTransformation)transformation;
 m_pDispTrans.ReferenceScale = 0;
 
 }
 
 
 //public void Draw(int hDC, int x, int y)
 public void Draw (
 IGeometry Geometry
 )
 {
 // TOD 添加cusFaSymbol.Draw 实现
 if (Geometry == null || !(Geometry is ESRI.ArcGIS.Geometry.IPoint))
 return;
 Graphics g = Graphics.FromHdc((System.IntPtr)m_lHDC);
 Matrix m = new Matrix();
 IPoint pPt = (IPoint)Geometry;
 int x;
 int y;
 if (m_pDispTrans == null)
 {
 x = (int)pPt.X;
 y = (int)pPt.Y;
 }
 else
 {
 m_pDispTrans.FromMapPoint(pPt, out x, out y);
 } 
 
 //point.PutCoords(
 m.RotateAt(360 - Convert.ToSingle(this.Angle), new System.Drawing.
 Point(x, y), MatrixOrder.Append);
 g.Transform = m;
 g.SmoothingMode = SmoothingMode.HighQuality;
 StringFormat sf = new StringFormat();
 sf.Alignment = StringAlignment.Center;
 sf.LineAlignment = StringAlignment.Center;
 sf.FormatFlags = StringFormatFlags.DirectionRightToLeft | StringFormatFlags.MeasureTrailingSpaces;
 string szS =Convert.ToString((char)this.CharacterIndex);
 Font fontt = new Font(this.Font.Name, (float)this.p_LSize);
 g.DrawString(szS, fontt, new SolidBrush(ColorTranslator.FromWin32((int)this.Color.RGB)), x, y, sf);
 float fFontHeight = fontt.GetHeight(g);// (Convert.ToSingle(this.p_dpi));
 fontt.Dispose();
 m.Reset();
 m.RotateAt((float)(360 - Angle), new System.Drawing.Point(x, y), MatrixOrder.Append);
 g.Transform = m;
 sf.FormatFlags = StringFormatFlags.LineLimit;
 sf.Alignment = StringAlignment.Near;
 sf.LineAlignment = StringAlignment.Far;
 Font font1 = new Font("宋体", Convert.ToSingle(this.p_LSize - 2));
 Font font2 = new Font("黑体", Convert.ToSingle(this.p_LSize - 1));
 g.DrawString(this.p_zb, font1, Brushes.Black, x + fFontHeight / 3, y, sf);
 sf.LineAlignment = StringAlignment.Near;
 g.DrawString(this.p_type, font2, Brushes.Black, x + fFontHeight / 3, y, sf);
 sf.Alignment = StringAlignment.Far;
 g.DrawString(this.p_num, font2, Brushes.Black, x - fFontHeight / 3, y, sf);
 font1.Dispose();
 font2.Dispose();
 m.Dispose();
 sf.Dispose();
 g.Dispose();
 }
 
 #endregion
}
 
 
///
//以下代码是我调用自定义类的方法的:
……………
 
…. bool bSel = true;
 //object o = 
 //_mapControl.DrawShape(point, ref o);
 IMarkerElement pmarkerEle = new MarkerElementClass();
 pmarkerEle.Symbol = getSymbol(dr, bSel);//pi.start_point_symbol;
 IElement pEle = pmarkerEle as IElement;
 pEle.Geometry = point as IGeometry;
 m_GroupEle.AddElement(pEle);//加载元素
 
 
//以下函数是获取自定义类的函数
private ICharacterMarkerSymbol getSymbol(DataRow _dr, bool _bSel)
 {
 CUSTOMSYMBOL.cusFaSymbol curSym = new CUSTOMSYMBOL.cusFaSymbol(_dr["警种"].ToString(), _dr["组别"].ToString(),
 _dr["数量"].ToString(), Convert.ToInt64(_dr["标注大小"]));//
 ICharacterMarkerSymbol sym = curSym as ICharacterMarkerSymbol;//new 
 int nSymSize = Convert.ToInt16(_dr["符号大小"]);
 int nSymIndex = Convert.ToInt16(_dr["符号序号"]);
 int nLblSize = Convert.ToInt16(_dr["标注大小"]); float angle = 0;
 if (!_dr.IsNull("符号角度"))
 {
 angle = Convert.ToSingle(_dr["符号角度"]);
 }
 
 IColor color = GetRGBColor(Convert.ToUInt32(_dr["颜色"]));
 
 sym.Font=(stdole.IFontDisp)ESRI.ArcGIS.ADF.COMSupport.OLE.GetIFontDispFromFont
 (new System.Drawing.Font(_dr["字体名称"].ToString(), nSymSize));
 sym.Size = nSymSize;
 sym.CharacterIndex = nSymIndex;
 sym.Color = color;
 sym.Angle = angle;
 //CUSTOMSYMBOL.cusFaSymbol curSym = sym as CUSTOMSYMBOL.cusFaSymbol;
 //sym.
 //sym.
 return sym;
 
 }

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