private void DrawCircle3PMouseDown(IPoint pPoint, int shift)
{
IGeometry pGeom = null;
IPolyline pPolyline;
IPolygon pPolygon;
IPoint pCenterPoint = new PointClass();
if (!m_bFirst) //如果命令没有使用
{
m_pPoint1 = pPoint;
m_bFirst = true;
m_bSecond = false;
m_pFeedback = new NewLineFeedbackClass();
m_pLineFeed = (INewLineFeedback)m_pFeedback;
m_pLineFeed.Display = m_pActiveView.ScreenDisplay;
m_pLineFeed.Start(pPoint);
CommonFunction.DrawPointSMSSquareSymbol(m_MapControl, m_pPoint1);
}
else if (!m_bSecond) //如果命令正在使用
{
m_pPoint2 = pPoint;
m_bSecond = true;
m_bThree = false;
CommonFunction.DrawPointSMSSquareSymbol(m_MapControl, m_pPoint2);
m_pLineFeed.Stop();
m_pActiveView.PartialRefresh(esriViewDrawPhase.esriViewGraphics, null, m_pEnvelope);
m_pFeedback = new NewCircleFeedbackClass();
}
else if (!m_bThree)
{
m_pPoint3 = m_pPoint;
m_bFirst = false;
m_bThree = true;
m_pCenterPoint = CommonFunction.GetCenter_P123(m_pPoint1, m_pPoint2, pPoint);
m_pCircleFeed = (NewCircleFeedbackClass)m_pFeedback;
m_pCircleFeed.Display = m_pActiveView.ScreenDisplay;
m_pCircleFeed.Stop();
m_pCircleFeed.Start(m_pCenterPoint);
m_pFeedback.MoveTo(pPoint);
ICircularArc pCircularArc = new CircularArcClass();
pCircularArc = m_pCircleFeed.Stop();
pCenterPoint = pCircularArc.CenterPoint;
if (shift == 1) //若果按住shift健弹出对话框，让用户修改圆周上的坐标值
{
frmCircle3P formCircle3P = new frmCircle3P();
formCircle3P.ShowDialog();
if (m_bModify) //修改坐标值了
{
//计算圆心坐标
pCenterPoint = CommonFunction.GetCenter_P123(m_pPoint1, m_pPoint2, m_pPoint3);
m_bModify = false;
}
}
switch (((IFeatureLayer)m_CurrentLayer).FeatureClass.ShapeType)
{
case esriGeometryType.esriGeometryPolyline:
pPolyline = CommonFunction.ArcToPolyline(pCircularArc.FromPoint, pCircularArc.CenterPoint, pCircularArc.FromPoint, esriArcOrientation.esriArcClockwise);
pGeom = pPolyline;
break;
case esriGeometryType.esriGeometryPolygon:
pPolyline = CommonFunction.ArcToPolyline(pCircularArc.FromPoint, pCircularArc.CenterPoint, pCircularArc.FromPoint, esriArcOrientation.esriArcClockwise);
pPolygon = CommonFunction.PolylineToPolygon(pPolyline);
pGeom = pPolygon;
break;
default:
break;
} //end switch
m_pEnvelope = pGeom.Envelope;
if (m_pEnvelope != null && !m_pEnvelope.IsEmpty)
{
m_pEnvelope.Expand(10, 10, false);
}
;
CommonFunction.CreateFeature(m_App.Workbench, pGeom, m_FocusMap, m_CurrentLayer);
Reset();
} // end if(!m_bThree)
m_pLastPoint = pPoint;
m_pSegment = null;
}
private void EndDrawArc3P(IPoint pPoint, int shift)
{
IGeometry pGeom = null;
IPolyline pPolyline;
IPolygon pPolygon;
pLineArray.Add(pPoint);
m_pLineFeed = (INewLineFeedback)m_pFeedback;
if (m_pLineFeed != null)
{
m_pLineFeed.Stop();
}
IPoint pFromPoint = (IPoint)pLineArray.get_Element(0);
IPoint pTempPoint = ( IPoint)pLineArray.get_Element(2);
IPoint pToPoint = (IPoint)pLineArray.get_Element(pLineArray.Count - 1);
IPoint pCenterPoint = CommonFunction.GetCenter_P123(pFromPoint, pTempPoint, pToPoint);
m_pPoint1 = pFromPoint;
m_pPoint2 = pTempPoint;
m_pPoint3 = pToPoint;
ICircularArc pArc = new CircularArcClass();
pArc.PutCoords(pCenterPoint, pFromPoint, pToPoint, esriArcOrientation.esriArcMajor);
if (m_bInUse)
{
if (shift == 1) //若果按住shift健就弹出对话框，让用户修改圆周上的坐标值
{
frmCircle3P formCircle3P = new frmCircle3P();
formCircle3P.ShowDialog();
if (m_bModify) //修改坐标值了
{
pFromPoint = m_pPoint1;
pToPoint = m_pPoint3;
pCenterPoint = CommonFunction.GetCenter_P123(m_pPoint1, m_pPoint2, m_pPoint3);
m_bModify = false;
}
}
if (m_Ca < Math.PI) //圆心角小于π
{
pPolyline = CommonFunction.ArcToPolyline(pFromPoint, pCenterPoint, pToPoint, esriArcOrientation.esriArcMinor);
}
else //圆心角大于π
{
pPolyline = CommonFunction.ArcToPolyline(pFromPoint, pCenterPoint, pToPoint, esriArcOrientation.esriArcMajor);
}
switch (((IFeatureLayer)m_CurrentLayer).FeatureClass.ShapeType)
{
case esriGeometryType.esriGeometryPolyline:
pGeom = (IGeometry)pPolyline;
break;
case esriGeometryType.esriGeometryPolygon:
ILine pCenterToFormPointLine = new LineClass();
pCenterToFormPointLine.PutCoords(pCenterPoint, pToPoint);
ILine pToPointToCenterLine = new LineClass();
pToPointToCenterLine.PutCoords(pFromPoint, pCenterPoint);
ISegmentCollection pSegsPolyline;
pSegsPolyline = (ISegmentCollection)pPolyline;
object a = System.Reflection.Missing.Value;
object b = System.Reflection.Missing.Value;
pSegsPolyline.AddSegment((ISegment)pCenterToFormPointLine, ref a, ref b);
pSegsPolyline.AddSegment((ISegment)pToPointToCenterLine, ref a, ref b);
pPolygon = CommonFunction.PolylineToPolygon((IPolyline)pSegsPolyline);
pGeom = (IGeometry)pPolygon;
break;
} //end switch
m_pEnvelope = pGeom.Envelope;
m_pEnvelope.Union(m_pCenterPoint.Envelope);
if (m_pEnvelope != null && !m_pEnvelope.IsEmpty)
{
m_pEnvelope.Expand(10, 10, false);
}
;
CommonFunction.CreateFeature(m_App.Workbench, pGeom, m_FocusMap, m_CurrentLayer);
Reset();
pLineArray.RemoveAll();
m_bInUse = false;
} //end else if (m_bInUse)
}