private IPolygon GetBufferedSmallRings([NotNull] IPolyline tooSmallRings,
double bufferDistance)
{
IList <IPolygon> bufferOutput = _bufferFactory.Buffer(tooSmallRings, bufferDistance);
Assert.AreEqual(1, bufferOutput.Count,
"Unexpected buffer output (distance: {0})", bufferDistance);
IPolygon result = bufferOutput[0];
if (!((IZAware)result).ZAware)
{
tooSmallRings.QueryEnvelope(_envelopeTemplateBuffer);
((IZAware)result).ZAware = true;
((IZ)result).SetConstantZ(_envelopeTemplateBuffer.ZMin);
}
return(result);
}
public override void OnMouseDown(int Button, int Shift, int X, int Y)
{
if (Button == 2)
{
return;
}
IPoint pt = m_hookHelper.ActiveView.ScreenDisplay.DisplayTransformation.ToMapPoint(X, Y);
pt = GIS.GraphicEdit.SnapSetting.getSnapPoint(pt);
IGraphicsContainer g = m_hookHelper.ActiveView.GraphicsContainer;
IEnvelope pEnvBounds = null;
//获取上一次轨迹线的范围,以便确定刷新范围
try
{
if (m_TraceLine != null)
{
m_TraceLine.QueryEnvelope(pEnvBounds);
pEnvBounds.Expand(4, 4, true); //矩形框向四周扩大4倍(大于2倍就行),目的是为了保证有充足的刷新区域
}
else
{
pEnvBounds = m_hookHelper.ActiveView.Extent;
}
}
catch
{
pEnvBounds = m_hookHelper.ActiveView.Extent;
}
#region 启动画线
if (m_NewLineFeedback == null)
{
//移除element
RemoveElements();
//刷新
m_hookHelper.ActiveView.PartialRefresh(esriViewDrawPhase.esriViewGraphics, null, null);
Application.DoEvents();
m_NewLineFeedback = new NewLineFeedbackClass();
m_NewLineFeedback.Display = m_hookHelper.ActiveView.ScreenDisplay;
//必须先得到symbol,后设置symbol
ISimpleLineSymbol simpleLineSymbol = m_NewLineFeedback.Symbol as ISimpleLineSymbol;
simpleLineSymbol.Style = esriSimpleLineStyle.esriSLSSolid;
simpleLineSymbol.Width = 2;
simpleLineSymbol.Color = TransColorToAEColor(Color.Blue);
m_NewLineFeedback.Start(pt);
}
else
{
m_NewLineFeedback.AddPoint(pt);
}
if (m_ptColl == null)
{
m_ptColl = new PolylineClass();
}
//记录节点
object obj = Type.Missing;
m_ptColl.AddPoint(pt, ref obj, ref obj);
#endregion
#region 绘制结点
try
{
IElement vertexElement = createElement_x(pt);
//
g = m_hookHelper.ActiveView as IGraphicsContainer;
//g.AddElement(vertexElement, 0);
//g.MoveElementToGroup(vertexElement, m_VertexElement);
m_VertexElement.AddElement(vertexElement);
//刷新
m_hookHelper.ActiveView.PartialRefresh(esriViewDrawPhase.esriViewGraphics, vertexElement, pEnvBounds);
}
catch
{ }
#endregion
try
{
if (m_ptColl.PointCount >= 2)
{
IPoint fromPt = m_ptColl.get_Point(m_ptColl.PointCount - 2); //倒数第二个点
IPoint toPt = m_ptColl.get_Point(m_ptColl.PointCount - 1); //最后第一个点
ILine line = new LineClass();
line.PutCoords(fromPt, toPt);
#region 绘制轨迹线
try
{
object missing = Type.Missing;
ISegmentCollection segColl = new PolylineClass();
segColl.AddSegment(line as ISegment, ref missing, ref missing);
IElement traceElement = createElement_x(segColl as IPolyline);
//
g = m_hookHelper.ActiveView as IGraphicsContainer;
//g.AddElement(traceElement, 0);
//g.MoveElementToGroup(traceElement, m_TraceElement);
m_TraceElement.AddElement(traceElement);
m_hookHelper.ActiveView.PartialRefresh(esriViewDrawPhase.esriViewGraphics, traceElement, pEnvBounds);
}
catch
{ }
#endregion
#region 计算单线的长度,并将结果显示在单线中点偏上上面
try
{
double angle = line.Angle;
if ((angle > (Math.PI / 2) && angle < (Math.PI)) || (angle > -Math.PI && angle < -(Math.PI / 2))) // 大于90度小于等于180
{
angle += Math.PI;
}
//标注点Y值偏移量
double d_OffsetY = m_hookHelper.ActiveView.ScreenDisplay.DisplayTransformation.FromPoints(9);
//标注点
double d_CenterX = (fromPt.X + toPt.X) / 2;
double d_CenterY = (fromPt.Y + toPt.Y) / 2 + d_OffsetY; //向上偏移
IPoint labelPt = new PointClass();
labelPt.PutCoords(d_CenterX, d_CenterY);
IUnitConverter unitConverter = new UnitConverterClass();
double segmentLength = unitConverter.ConvertUnits(line.Length, _MsgInfo.inUnit.pUnit, _MsgInfo.outUnit.pUnit);
ITextElement txtElement = CreateTextElement(segmentLength.ToString("0.00"));
IElement labelelement = txtElement as IElement;
labelelement.Geometry = labelPt;
object oElement = (object)labelelement;
//根据角度旋转
TransformByRotate(ref oElement, labelPt, angle);
////添加到GraphicsContainer
//g.AddElement(labelelement, 0);
////移到m_LabelElement组中
//g.MoveElementToGroup(labelelement, m_LabelElement);
//添加到组
m_LabelElement.AddElement(labelelement);
//刷新
m_hookHelper.ActiveView.PartialRefresh(esriViewDrawPhase.esriViewGraphics, labelelement, pEnvBounds);
}
catch
{ }
#endregion
}
}
catch
{ }
_MsgInfo.LineResultChange();
}
