学步园

privatevoid
axMapControl1_OnMouseDown(object
sender, IMapControlEvents2_OnMouseDownEvente)

       {

           IPoint
pPoint = newPointClass();

           pPoint.PutCoords(e.mapX,
e.mapY);

           pActiveView=axMapControl1.ActiveView;

           if
(pFeedBack == null)

           {

               pFeedBack
= newNewBezierCurveFeedbackClass();

               pFeedBack.Display
= pActiveView.ScreenDisplay;

               pFeedBack.Start(pPoint);

           }

           else

       
    {

               pFeedBack.AddPoint(pPoint);

           }

       }

       privatevoid
axMapControl1_OnMouseMove(object
sender, IMapControlEvents2_OnMouseMoveEvente)

       {

           if
(pFeedBack != null)

           {

               IPoint
pPoint = newPointClass();

               pPoint.PutCoords(e.mapX,
e.mapY);

               pFeedBack.MoveTo(pPoint);

           }

       }

       privatevoid
AddBezier(IGeometry
pGeometry, IActiveView
pActiveView)

       {

           IElementpElement;

           ILineElementpLineElement
= newLineElementClass();

           ISimpleLineSymbolpSimpleLineSymbol
= newSimpleLineSymbolClass();

           pElement = pLineElement
asIElement;

           pElement.Geometry = pGeometry;

           pSimpleLineSymbol.Color
= GetRGBColor(255, 215,0);

           pSimpleLineSymbol.Style
= esriSimpleLineStyle.esriSLSSolid;

           pSimpleLineSymbol.Width
= 2;

           pLineElement.Symbol = pSimpleLineSymbol;

           IGraphicsContainerpGraphicsContainer
=axMapControl1.ActiveView asIGraphicsContainer;

           pGraphicsContainer.AddElement((IElement)pLineElement,
0);

           axMapControl1.ActiveView.PartialRefresh(esriViewDrawPhase.esriViewGraphics,
null,
null);

       }

       privateIRgbColor
GetRGBColor(int
red, int
green, int blue)

       {

           IRgbColorrGBColor
= newRgbColorClass();

           rGBColor.Red=
red;

           rGBColor.Green = green;

           rGBColor.Blue = blue;

           return
rGBColor;

       }

       privatevoid
axMapControl1_OnDoubleClick(object
sender, IMapControlEvents2_OnDoubleClickEvente)

       {

           IGeometrypGeometry;

           pGeometry = pFeedBack.Stop();

           pActiveView = axMapControl1.ActiveView;

           AddBezier(pGeometry, pActiveView);

           pFeedBack =
null;

       }