ThinkGeo Cloud
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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.Linq; using System.Windows.Forms; namespace ConvexHull { 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 ConvexHull { 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(-93.40,29.65,-87.14,26.03), Map.Width, Map.Height); mapEngine.BackgroundFillBrush = new GeoSolidBrush(GeoColor.GeographicColors.ShallowOcean); //Displays the World Map Kit as a background. ThinkGeo.MapSuite.Core.WorldMapKitLayer worldMapKitLayer = new ThinkGeo.MapSuite.Core.WorldMapKitLayer(); mapEngine.StaticLayers.Add(worldMapKitLayer); ShapeFileFeatureLayer oilLayer = new ShapeFileFeatureLayer(@"..\..\Data\oilrigs.shp"); oilLayer.ZoomLevelSet.ZoomLevel01.DefaultPointStyle.PointType = PointType.Bitmap; oilLayer.ZoomLevelSet.ZoomLevel01.DefaultPointStyle.Image = new GeoImage(@"..\..\Data\Well_Oil.png"); oilLayer.ZoomLevelSet.ZoomLevel01.ApplyUntilZoomLevel = ApplyUntilZoomLevel.Level20; mapEngine.StaticLayers.Add("Oil",oilLayer); DrawImage(); } private void btnConvexHull_Click(object sender, EventArgs e) { //Gets all the features of the oil rigs layer. ShapeFileFeatureLayer oilLayer = (ShapeFileFeatureLayer)mapEngine.StaticLayers["Oil"]; oilLayer.Open(); Collection<Feature> features = oilLayer.FeatureSource.GetAllFeatures(ReturningColumnsType.NoColumns); oilLayer.Close(); //Populate the MultipointShape of all the PointShapes from the oil rigs features. MultipointShape multipointShape = new MultipointShape(); foreach (Feature feature in features) { PointShape pointShape = (PointShape)feature.GetShape(); multipointShape.Points.Add(pointShape); } //Gets the Convex Hull from the MultipointShape. RingShape ringShape = multipointShape.ConvexHull(); //Creates the PolygonShape and the InMemoryFeatureLayer for displaying the Convex Hull. PolygonShape polygonShape = new PolygonShape(); polygonShape.OuterRing = ringShape; InMemoryFeatureLayer inMemoryFeatureLayer = new InMemoryFeatureLayer(); inMemoryFeatureLayer.ZoomLevelSet.ZoomLevel01.DefaultAreaStyle = AreaStyles.CreateSimpleAreaStyle(new GeoColor(100, GeoColor.StandardColors.Red), GeoColor.StandardColors.Black); inMemoryFeatureLayer.ZoomLevelSet.ZoomLevel01.ApplyUntilZoomLevel = ApplyUntilZoomLevel.Level20; inMemoryFeatureLayer.InternalFeatures.Add(new Feature(polygonShape)); mapEngine.DynamicLayers.Add(inMemoryFeatureLayer); 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); } } }