ThinkGeo Cloud
ThinkGeo UI Controls
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ThinkGeo Cloud
ThinkGeo UI Controls
ThinkGeo Open Source
Help and Support
External Resources
using System; using System.Collections.Generic; using System.Collections.ObjectModel; using ThinkGeo.MapSuite.Core; namespace DisplayingOneWayStreets { //Displays an arrow (GeoImage) if the value (OneWayValue) is one-way in the column OnWayColumnName. //Shows the arrow in the direction of the vertices of the line records. class OneWayLineStyle : LineStyle { private string oneWayColumnName; private string oneWayValue; private GeoImage geoImage; public OneWayLineStyle() : this(string.Empty, string.Empty, new GeoImage()) { } public OneWayLineStyle (string oneWayColumnName, string oneWayValue, GeoImage geoImage) { this.oneWayColumnName = oneWayColumnName; this.oneWayValue = oneWayValue; this.geoImage = geoImage; } public string OneWayColumnName { get { return oneWayColumnName; } set { oneWayColumnName = value; } } public string OneWayValue { get { return oneWayValue; } set { oneWayValue = value; } } //Image representing the arrow. //The arrow of the image should be pointing to the top to have the function GetAngleFromTwoVertices working adequately. public GeoImage GeoImage { get { return geoImage; } set { geoImage = value; } } protected override void DrawCore(IEnumerable<Feature> features, GeoCanvas canvas, Collection<SimpleCandidate> labelsInThisLayer, Collection<SimpleCandidate> labelsInAllLayers) { //Loops thru the features to draw the one way feature with the geoImage (arrow) foreach (Feature feature in features) { string currentOneWayValue = Convert.ToString(feature.ColumnValues[oneWayColumnName]); if (currentOneWayValue == oneWayValue) { MultilineShape multilineShape = (MultilineShape)feature.GetShape(); //Gets the LineShape made of the two vertices of the longest segment for displaying the arrow image on it. LineShape lineShape = GetLongestSegment(multilineShape); //Gets the angle based on the two vertices of the longest segment. double angle = GetAngleFromTwoVertices(lineShape.Vertices[0], lineShape.Vertices[1]); //Gets the PointShape in the middle of the longest segment to center the arrow image on. PointShape pointShape = lineShape.GetPointOnALine(StartingPoint.FirstPoint,50); canvas.DrawWorldImage(geoImage, pointShape.X, pointShape.Y, geoImage.GetWidth(), geoImage.GetHeight(),DrawingLevel.LevelFour,0,0 , (float)angle); } } } private LineShape GetLongestSegment(MultilineShape multiLineShape) { LineShape resultLineShape = new LineShape(); double longestDist = 0; foreach (LineShape lineShape in multiLineShape.Lines) { for (int i = 0; i < lineShape.Vertices.Count - 2; i++) { PointShape pointShape1 = new PointShape(lineShape.Vertices[i]); PointShape pointShape2 = new PointShape(lineShape.Vertices[i|+ 1]); double currentDist = pointShape1.GetDistanceTo(pointShape2, GeographyUnit.Meter, DistanceUnit.Meter); if (currentDist > longestDist) { resultLineShape.Vertices.Clear(); resultLineShape.Vertices.Add(lineShape.Vertices[i]); resultLineShape.Vertices.Add(lineShape.Vertices[i|+ 1]); longestDist = currentDist; } } } return resultLineShape; } private double GetAngleFromTwoVertices(Vertex b, Vertex c) { double alpha = 0; double tangentAlpha = (c.Y - b.Y) / (c.X - b.X); double Peta = Math.Atan(tangentAlpha); if (c.X > b.X) { alpha = 90 + (Peta * (180 / Math.PI)); } else if (c.X < b.X) { alpha = 270 + (Peta * (180 / Math.PI)); } else { if (c.Y > b.Y) alpha = 0; if (c.Y < b.Y) alpha = 180; } return alpha; } protected override Collection<string> GetRequiredColumnNamesCore() { Collection<string> columns = new Collection<string>(); if (!columns.Contains(oneWayColumnName)) { columns.Add(oneWayColumnName); } return columns; } } }
using System; using System.Collections.Generic; using System.Linq; using System.Windows.Forms; namespace DisplayingOneWayStreets { static class Program { /// <summary> /// The main entry point for the application. /// </summary> [STAThread] static void Main() { Application.EnableVisualStyles(); Application.SetCompatibleTextRenderingDefault(false); Application.Run(new TestForm()); } } }
using System; using System.Collections.ObjectModel; using System.Drawing; using System.Windows.Forms; using ThinkGeo.MapSuite.Core; namespace DisplayingOneWayStreets { public partial class TestForm : Form { private MapEngine mapEngine = new MapEngine(); private Bitmap bitmap = null; public TestForm() { InitializeComponent(); } private void TestForm_Load(object sender, EventArgs e) { // Set the extent and the background color mapEngine.CurrentExtent = ExtentHelper.GetDrawingExtent(new RectangleShape(-97.77,30.30,-97.75,30.29), Map.Width, Map.Height); mapEngine.BackgroundFillBrush = new GeoSolidBrush(GeoColor.FromArgb(255,237,234,226)); //Adds the street Layer for Austin ShapeFileFeatureLayer austinStreetsShapeLayer = new ShapeFileFeatureLayer(@"..\..\Data\AustinWithOneWayRoad.shp"); austinStreetsShapeLayer.ZoomLevelSet.ZoomLevel01.ApplyUntilZoomLevel = ApplyUntilZoomLevel.Level20; //Adds the first LineStyle for displaying the streets austinStreetsShapeLayer.ZoomLevelSet.ZoomLevel01.CustomStyles.Add(LineStyles.LocalRoad1); //Adds the second LineStyle of type OneWayLineStyle for displaying the arrow (geoImage) according to the street direction. OneWayLineStyle oneWayLineStyle = new OneWayLineStyle("ONE_WAY","1", new GeoImage(@"..\..\Data\Arrow_up.png")); austinStreetsShapeLayer.ZoomLevelSet.ZoomLevel01.CustomStyles.Add(oneWayLineStyle); ShapeFileFeatureLayer austinStreetsLabelLayer = new ShapeFileFeatureLayer(@"..\..\Data\AustinWithOneWayRoad.shp"); austinStreetsLabelLayer.ZoomLevelSet.ZoomLevel01.CustomStyles.Add(TextStyles.LocalRoad1("FENAME")); austinStreetsLabelLayer.ZoomLevelSet.ZoomLevel01.ApplyUntilZoomLevel = ApplyUntilZoomLevel.Level20; mapEngine.StaticLayers.Add("StreetLayer", austinStreetsShapeLayer); mapEngine.StaticLayers.Add("StreetLayerLabel", austinStreetsLabelLayer); DrawImage(); } private void DrawImage() { if (bitmap != null) { bitmap.Dispose(); } bitmap = new Bitmap(Map.Width, Map.Height); mapEngine.OpenAllLayers(); mapEngine.DrawStaticLayers(bitmap, GeographyUnit.DecimalDegree); mapEngine.DrawDynamicLayers(bitmap, GeographyUnit.DecimalDegree); mapEngine.CloseAllLayers(); Map.Image = bitmap; } private void ToolBar_ButtonClick(object sender, ToolBarButtonClickEventArgs e) { switch (e.Button.Tag.ToString()) { case "Zoom In": mapEngine.CurrentExtent.ScaleDown(50); break; case "Zoom Out": mapEngine.CurrentExtent.ScaleUp(50); break; case "Full Extent": mapEngine.CurrentExtent = ExtentHelper.GetDrawingExtent(new RectangleShape(-180.0, 83.0, 180.0, -90.0), Map.Width, Map.Height); break; case "Pan Left": mapEngine.CurrentExtent = ExtentHelper.Pan(mapEngine.CurrentExtent, PanDirection.Left, 20); break; case "Pan Right": mapEngine.CurrentExtent = ExtentHelper.Pan(mapEngine.CurrentExtent, PanDirection.Right, 20); break; case "Pan Up": mapEngine.CurrentExtent = ExtentHelper.Pan(mapEngine.CurrentExtent, PanDirection.Up, 20); break; case "Pan Down": mapEngine.CurrentExtent = ExtentHelper.Pan(mapEngine.CurrentExtent, PanDirection.Down, 20); break; default: break; } DrawImage(); } private void btnClose_Click(object sender, EventArgs e) { this.Close(); } private void Map_MouseMove(object sender, MouseEventArgs e) { //Displays the X and Y in screen coordinates. statusStrip1.Items["toolStripStatusLabelScreen"].Text = "X:" + e.X + " Y:" + e.Y; //Gets the PointShape in world coordinates from screen coordinates. PointShape pointShape = ExtentHelper.ToWorldCoordinate(mapEngine.CurrentExtent, new ScreenPointF(e.X, e.Y), Map.Width, Map.Height); //Displays world coordinates. statusStrip1.Items["toolStripStatusLabelWorld"].Text = "(world) X:" + Math.Round(pointShape.X, 4) + " Y:" + Math.Round(pointShape.Y, 4); } } }