public IGeometry DrawPolyline(ESRI.ArcGIS.Carto.IActiveView activeView)
{
if (activeView == null)
{
return(null);
}
ESRI.ArcGIS.Display.IScreenDisplay screenDisplay = activeView.ScreenDisplay;
// Constant
screenDisplay.StartDrawing(screenDisplay.hDC, (System.Int16)ESRI.ArcGIS.Display.esriScreenCache.esriNoScreenCache); // Explicit Cast
ESRI.ArcGIS.Display.IRgbColor rgbColor = new ESRI.ArcGIS.Display.RgbColor();
rgbColor.Red = 255;
ESRI.ArcGIS.Display.IColor color = rgbColor; // Implicit Cast
ESRI.ArcGIS.Display.ISimpleLineSymbol simpleLineSymbol = new SimpleLineSymbol();
simpleLineSymbol.Color = color;
simpleLineSymbol.Style = esriSimpleLineStyle.esriSLSDashDot;
ESRI.ArcGIS.Display.ISymbol symbol = (ESRI.ArcGIS.Display.ISymbol)simpleLineSymbol; // Explicit Cast
ESRI.ArcGIS.Display.IRubberBand rubberBand = new RubberLine();
ESRI.ArcGIS.Geometry.IGeometry geometry = rubberBand.TrackNew(screenDisplay, symbol);
screenDisplay.SetSymbol(symbol);
screenDisplay.DrawPolyline(geometry);
screenDisplay.FinishDrawing();
return(geometry);
}
//生成颜色
public static IRgbColor CreatRgbColor(int nR, int nG, int nB, bool blTransparency)
{
ESRI.ArcGIS.Display.IRgbColor pRgbColor = null;
pRgbColor = new ESRI.ArcGIS.Display.RgbColor();
if (blTransparency == true)
{
pRgbColor.Transparency = 0;
}
else
{
pRgbColor.Red = nR;
pRgbColor.Green = nG;
pRgbColor.Blue = nB;
}
return(pRgbColor);
}
/// <summary>
/// Occurs when this command is clicked
/// </summary>
public override void OnClick()
{
try
{
//get access to the document and the active view
pMxDocument = (IMxDocument)clsAgrcArcMapExtension.m_application.Document;
pMap = pMxDocument.FocusMap;
pActiveView = pMxDocument.ActiveView; //pActiveView = (IActiveView)pMap;
//get the map's graphics layer
ICompositeGraphicsLayer2 pComGraphicsLayer = pMap.BasicGraphicsLayer as ICompositeGraphicsLayer2;
ICompositeLayer pCompositeLayer = pComGraphicsLayer as ICompositeLayer;
ILayer pLayer;
//loop through all graphic layers in the map and check for the 'PolyVertices' layer, if found, delete it, in order to start fresh
for (int i = 0; i < pCompositeLayer.Count; i++)
{
pLayer = pCompositeLayer.get_Layer(i);
if (pLayer.Name == "PolyVertices")
{
pComGraphicsLayer.DeleteLayer("PolyVertices");
break;
}
}
if (bolVerticesOn == false)
{
IGraphicsLayer pGraphicsLayer = pComGraphicsLayer.AddLayer("PolyVertices", null);
pMap.ActiveGraphicsLayer = (ILayer)pGraphicsLayer;
IGraphicsContainer pGraphicsContainer = pComGraphicsLayer.FindLayer("PolyVertices") as IGraphicsContainer;
//make sure the user has selected a polygon or polyline layer
if (pMxDocument.SelectedLayer == null)
{
MessageBox.Show("Please select a layer.", "Select Layer", MessageBoxButtons.OK, MessageBoxIcon.Information);
return;
}
if (!(pMxDocument.SelectedLayer is IFeatureLayer))
{
MessageBox.Show("Please select a polygon or line layer.", "Polygon or Line", MessageBoxButtons.OK, MessageBoxIcon.Information);
return;
}
//cast the selected layer as a feature layer
IGeoFeatureLayer pGFlayer = (IGeoFeatureLayer)pMxDocument.SelectedLayer;
//check if the feaure layer is a polygon or line layer
if (pGFlayer.FeatureClass.ShapeType != esriGeometryType.esriGeometryPolygon & pGFlayer.FeatureClass.ShapeType != esriGeometryType.esriGeometryPolyline)
{
MessageBox.Show("Please select a polygon or line layer.", "Polygon or Line", MessageBoxButtons.OK, MessageBoxIcon.Information);
return;
}
//setup marker symbol
ISimpleMarkerSymbol pSimpleMarker = new SimpleMarkerSymbol();
ISymbol pSymbolMarker = (ISymbol)pSimpleMarker;
IRgbColor pRgbColor = new ESRI.ArcGIS.Display.RgbColorClass();
pRgbColor.Red = 223;
pRgbColor.Green = 155;
pRgbColor.Blue = 255;
pSimpleMarker.Color = pRgbColor;
pSimpleMarker.Style = esriSimpleMarkerStyle.esriSMSDiamond;
pSimpleMarker.Size = 8;
//setup line symbol
ISimpleLineSymbol pSimpleLineSymbol = new SimpleLineSymbol();
ISymbol pSymbolLine = (ISymbol)pSimpleLineSymbol;
pRgbColor = new ESRI.ArcGIS.Display.RgbColor();
pRgbColor.Red = 0;
pRgbColor.Green = 255;
pRgbColor.Blue = 0;
pSimpleLineSymbol.Color = pRgbColor;
pSimpleLineSymbol.Style = esriSimpleLineStyle.esriSLSSolid;
pSimpleLineSymbol.Width = 1;
//setup simplefill symbol
ISimpleFillSymbol pSimpleFillSymbol = new SimpleFillSymbol();
ISymbol pSymbolPolygon = (ISymbol)pSimpleFillSymbol;
pRgbColor = new ESRI.ArcGIS.Display.RgbColor();
pRgbColor.Red = 0;
pRgbColor.Green = 0;
pRgbColor.Blue = 255;
pSimpleFillSymbol.Color = pRgbColor;
pSimpleFillSymbol.Style = esriSimpleFillStyle.esriSFSSolid;
//get all the polygons in the current map extent ina cursor
IEnvelope pMapExtent = pActiveView.Extent;
ISpatialFilter pQFilter = new SpatialFilter();
pQFilter.GeometryField = "SHAPE";
pQFilter.Geometry = pMapExtent;
pQFilter.SpatialRel = esriSpatialRelEnum.esriSpatialRelIntersects;
IFeatureCursor pFCursor = pGFlayer.Search(pQFilter, true);
//draw each polygon and then each polygon's point collection
IFeature pFeature = pFCursor.NextFeature();
IGeometry pGeometry;
while (pFeature != null)
{
pGeometry = pFeature.Shape;
//draw the polygon
//draw each vertex on the polygon
IPointCollection pPointCollection = pGeometry as IPointCollection;
for (int i = 0; i < pPointCollection.PointCount; i++)
{
IGeometry pPtGeom = pPointCollection.get_Point(i);
IElement pElement = new MarkerElement();
pElement.Geometry = pPtGeom;
IMarkerElement pMarkerElement = pElement as IMarkerElement;
pMarkerElement.Symbol = pSimpleMarker;
pGraphicsContainer.AddElement(pElement, 0);
}
pFeature = pFCursor.NextFeature();
}
bolVerticesOn = true;
}
else //if (bolVerticesOn == true)
{
bolVerticesOn = false;
}
//refresh the map
pActiveView.Refresh();
pActiveView.Refresh();
}
catch (Exception ex)
{
MessageBox.Show("Error Message: " + Environment.NewLine + ex.Message + Environment.NewLine + Environment.NewLine +
"Error Source: " + Environment.NewLine + ex.Source + Environment.NewLine + Environment.NewLine +
"Error Location:" + Environment.NewLine + ex.StackTrace,
"AGRC Custom Tools ArcMap Error!", MessageBoxButtons.OK, MessageBoxIcon.Exclamation);
}
}
