/// <summary>
/// 创建几何图形对应的用于高亮显示的元素
/// </summary>
/// <param name="geometry"></param>
/// <returns></returns>
private static IElement CreateHightLightElement(IGeometry geometry)
{
IElement element = null;
IColor redcolor = RenderOpt.GetIColor(255, 0, 0, 50);
IColor bluecolor = RenderOpt.GetIColor(0, 0, 255);
switch (geometry.GeometryType)
{
case esriGeometryType.esriGeometryLine:
case esriGeometryType.esriGeometryPolyline:
element = new LineElementClass();
element.Geometry = geometry;
((ILineElement)element).Symbol = RenderOpt.GetSimpleLineSymbol(redcolor);
break;
case esriGeometryType.esriGeometryPolygon:
element = new PolygonElementClass();
element.Geometry = geometry;
((PolygonElementClass)element).Symbol = RenderOpt.GetSimpleFillSymbol(redcolor, bluecolor);
break;
case esriGeometryType.esriGeometryPoint:
element = new MarkerElementClass();
element.Geometry = geometry;
IMarkerSymbol pisymbol = new SimpleMarkerSymbolClass();
pisymbol.Color = (IColor)redcolor;
pisymbol.Size = 6;
((MarkerElementClass)element).Symbol = pisymbol;
break;
}
return(element);
}
//主地图：地图范围（Extent）变化
private void axMapControlMainMap_OnExtentUpdated(object sender, IMapControlEvents2_OnExtentUpdatedEvent e)
{
#region 主地图地图范围Extent变化时，鹰眼中的地图范围Extent也跟随着变化
IEnvelope envelope = (IEnvelope)e.newEnvelope; //得到主地图的新范围
IGraphicsContainer graphicsContainer = axMapControlEagleMap.Map as IGraphicsContainer;
IActiveView activeView = graphicsContainer as IActiveView;
graphicsContainer.DeleteAllElements(); //在绘制前，清除axMapControlEagleMap中的任何图形元素
IRectangleElement rectangleElement = new RectangleElement() as IRectangleElement;
IElement element = rectangleElement as IElement;
element.Geometry = envelope;
//产生一个线符号对象,设置鹰眼中的红线框
ILineSymbol lineSymbol = new SimpleLineSymbol();
lineSymbol.Width = 1.6;
lineSymbol.Color = RenderOpt.GetIColor(255, 0, 0);
//设置填充符号的属性
IFillSymbol fillSymbol = new SimpleFillSymbol();
fillSymbol.Color = RenderOpt.GetIColor(255, 0, 0, 0);
fillSymbol.Outline = lineSymbol;
IFillShapeElement fillShapeElement = element as IFillShapeElement;
fillShapeElement.Symbol = fillSymbol;
graphicsContainer.AddElement((IElement)fillShapeElement, 0);
//刷新
envelope.Expand(2, 2, true);
activeView.Extent = envelope;
activeView.PartialRefresh(esriViewDrawPhase.esriViewGeography, null, null);
#endregion
}
