private void RefreshTracker()
{
if (this.m_pCachedDisplay != null)
{
IGeometry geometry = new ESRI.ArcGIS.Geometry.Polygon() as IGeometry;
this.QueryOutline(this.m_pCachedDisplay, geometry as IPolygon);
this.m_pSelectionTracker.Geometry = geometry.Envelope;
}
}
public void QueryOutline(IDisplay Display, IPolygon Outline)
{
IPolygon boundary = new ESRI.ArcGIS.Geometry.Polygon() as IPolygon;
boundary.SetEmpty();
((ISymbol)this.m_pFillSymbol1).QueryBoundary(Display.hDC, Display.DisplayTransformation, this.m_pGeometry,
boundary);
((IPointCollection)Outline).AddPointCollection((IPointCollection)boundary);
}
public bool HitTest(double x, double y, double Tolerance)
{
IPoint other = new ESRI.ArcGIS.Geometry.Point();
other.PutCoords(x, y);
IRelationalOperator @operator = new ESRI.ArcGIS.Geometry.Polygon() as IRelationalOperator;
this.QueryOutline(this.m_pCachedDisplay, @operator as IPolygon);
return([email protected](other));
}
public void QueryBounds(IDisplay Display, IEnvelope Bounds)
{
IPolygon boundary = new ESRI.ArcGIS.Geometry.Polygon() as IPolygon;
boundary.SetEmpty();
((ISymbol)this.m_pFillSymbol1).QueryBoundary(Display.hDC, Display.DisplayTransformation, this.m_pGeometry,
boundary);
Bounds.XMin = boundary.Envelope.XMin;
Bounds.XMax = boundary.Envelope.XMax;
Bounds.YMin = boundary.Envelope.YMin;
Bounds.YMax = boundary.Envelope.YMax;
Bounds.SpatialReference = boundary.Envelope.SpatialReference;
}
public void Transform(esriTransformDirection direction, ITransformation transformation)
{
object before = Missing.Value;
IPointCollection points = new ESRI.ArcGIS.Geometry.Polygon();
points.AddPoint(this.m_pGeometry.LowerLeft, ref before, ref before);
points.AddPoint(this.m_pGeometry.LowerRight, ref before, ref before);
points.AddPoint(this.m_pGeometry.UpperRight, ref before, ref before);
points.AddPoint(this.m_pGeometry.UpperLeft, ref before, ref before);
(points as IPolygon).Close();
(points as IGeometry).SpatialReference = this.m_pGeometry.SpatialReference;
(points as ITransform2D).Transform(direction, transformation);
IEnvelope envelope = (points as IPolygon).Envelope;
this.m_pGeometry = envelope;
this.RefreshTracker();
}
//获得一个环的形状
private static ESRI.ArcGIS.Geometry.Polygon MakePolygonFromRing(ESRI.ArcGIS.Geometry.IRing pRing)
{
ESRI.ArcGIS.Geometry.Polygon pResPolygon = null;
ESRI.ArcGIS.Geometry.IPolygon pPolygon = null;
try
{
pPolygon = new ESRI.ArcGIS.Geometry.PolygonClass();
ESRI.ArcGIS.Geometry.IGeometryCollection pGeometryCollection;
pGeometryCollection = pPolygon as ESRI.ArcGIS.Geometry.IGeometryCollection;
object missing = Type.Missing;
pGeometryCollection.AddGeometry(pRing, ref missing, ref missing);
pResPolygon = pPolygon as ESRI.ArcGIS.Geometry.Polygon;
return(pResPolygon);
}
catch (Exception err)
{
pResPolygon = null;
pPolygon = null;
}
return(null);
}
private Image SymbolToBitmap(IGradientFillSymbol iSymbol, int iStyle, int iWidth, int iHeight)
{
IntPtr iHDC = new IntPtr();
Bitmap iBitmap = new Bitmap(iWidth, iHeight);
Graphics iGraphics = System.Drawing.Graphics.FromImage(iBitmap);
tagRECT itagRECT;
IEnvelope iEnvelope = new EnvelopeClass() as IEnvelope;
IDisplayTransformation iDisplayTransformation;
IPoint iPoint;
IGeometryCollection iPolyline;
IGeometryCollection iPolygon;
IRing iRing;
ISegmentCollection iSegmentCollection;
IGeometry iGeometry = null;
object Missing = Type.Missing;
iEnvelope.PutCoords(0, 0, iWidth, iHeight);
itagRECT.left = 0;
itagRECT.right = iWidth;
itagRECT.top = 0;
itagRECT.bottom = iHeight;
iDisplayTransformation = new DisplayTransformationClass();
iDisplayTransformation.VisibleBounds = iEnvelope;
iDisplayTransformation.Bounds = iEnvelope;
iDisplayTransformation.set_DeviceFrame(ref itagRECT);
iDisplayTransformation.Resolution = iGraphics.DpiX / 100000;
iHDC = iGraphics.GetHdc();
//获取Geometry;
if (iSymbol is ESRI.ArcGIS.Display.IMarkerSymbol)
{
switch (iStyle)
{
case 0:
iPoint = new ESRI.ArcGIS.Geometry.Point();
iPoint.PutCoords(iWidth / 2, iHeight / 2);
iGeometry = iPoint;
break;
default:
break;
}
}
else
{
if (iSymbol is ESRI.ArcGIS.Display.ILineSymbol)
{
iSegmentCollection = new ESRI.ArcGIS.Geometry.Path() as ISegmentCollection;
iPolyline = new ESRI.ArcGIS.Geometry.Polyline() as IGeometryCollection;
switch (iStyle)
{
case 0:
iSegmentCollection.AddSegment(CreateLine(0, iHeight / 2, iWidth, iHeight / 2) as ISegment, ref Missing, ref Missing);
iPolyline.AddGeometry(iSegmentCollection as IGeometry, ref Missing, ref Missing);
iGeometry = iPolyline as IGeometry;
break;
case 1:
iSegmentCollection.AddSegment(CreateLine(0, iHeight / 4, iWidth / 4, 3 * iHeight / 4) as ISegment, ref Missing, ref Missing);
iSegmentCollection.AddSegment(CreateLine(iWidth / 4, 3 * iHeight / 4, 3 * iWidth / 4, iHeight / 4) as ISegment, ref Missing, ref Missing);
iSegmentCollection.AddSegment(CreateLine(3 * iWidth / 4, iHeight / 4, iWidth, 3 * iHeight / 4) as ISegment, ref Missing, ref Missing);
iPolyline.AddGeometry(iSegmentCollection as IGeometry, ref Missing, ref Missing);
iGeometry = iPolyline as IGeometry;
break;
default:
break;
}
}
else
if (iSymbol is ESRI.ArcGIS.Display.IFillSymbol)
{
iSegmentCollection = new ESRI.ArcGIS.Geometry.Ring() as ISegmentCollection;
iPolygon = new ESRI.ArcGIS.Geometry.Polygon() as IGeometryCollection;
switch (iStyle)
{
case 0:
iSegmentCollection.AddSegment(CreateLine(5, iHeight - 5, iWidth - 6, iHeight - 5) as ISegment, ref Missing, ref Missing);
iSegmentCollection.AddSegment(CreateLine(iWidth - 6, iHeight - 5, iWidth - 6, 6) as ISegment, ref Missing, ref Missing);
iSegmentCollection.AddSegment(CreateLine(iWidth - 6, 6, 5, 6) as ISegment, ref Missing, ref Missing);
iRing = iSegmentCollection as IRing;
iRing.Close();
iPolygon.AddGeometry(iSegmentCollection as IGeometry, ref Missing, ref Missing);
iGeometry = iPolygon as IGeometry;
break;
default:
break;
}
}
else
if (iSymbol is ESRI.ArcGIS.Display.ISimpleTextSymbol)
{
switch (iStyle)
{
case 0:
iPoint = new ESRI.ArcGIS.Geometry.Point();
iPoint.PutCoords(iWidth / 2, iHeight / 2);
iGeometry = iPoint;
break;
default:
break;
}
}
}////////////////////////
if (iGeometry == null)
{
MessageBox.Show("几何对象不符合！", "错误");
return(null);
}
ISymbol pOutputSymbol = iSymbol as ISymbol;
pOutputSymbol.SetupDC(iHDC.ToInt32(), iDisplayTransformation);
pOutputSymbol.Draw(iGeometry);
pOutputSymbol.ResetDC();
iGraphics.ReleaseHdc(iHDC);
iGraphics.Dispose();
return(iBitmap);
}
