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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 DrawAPieShape { 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 DrawAPieShape { 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(-126.51,50.92,-66.08,22.48), Map.Width, Map.Height); mapEngine.BackgroundFillBrush = new GeoSolidBrush(GeoColor.GeographicColors.ShallowOcean); mapEngine.SnapToZoomLevel(GeographyUnit.DecimalDegree, Map.Width, Map.Height, new ZoomLevelSet()); //Displays the World Map Kit as a background. ThinkGeo.MapSuite.Core.WorldMapKitLayer worldMapKitLayer = new ThinkGeo.MapSuite.Core.WorldMapKitLayer(); mapEngine.StaticLayers.Add(worldMapKitLayer); // EllipseShape ellipseShape = new EllipseShape(new PointShape(-95.1304, 39.0181), 40, 25); InMemoryFeatureLayer ellipseLayer = new InMemoryFeatureLayer(); ellipseLayer.InternalFeatures.Add("Ellipse", new Feature(ellipseShape)); ellipseLayer.ZoomLevelSet.ZoomLevel01.DefaultAreaStyle.FillSolidBrush.Color = GeoColor.StandardColors.Transparent; ellipseLayer.ZoomLevelSet.ZoomLevel01.DefaultAreaStyle.OutlinePen.Color = GeoColor.FromArgb(100, GeoColor.StandardColors.Blue); ellipseLayer.ZoomLevelSet.ZoomLevel01.ApplyUntilZoomLevel = ApplyUntilZoomLevel.Level20; InMemoryFeatureLayer pieLayer = new InMemoryFeatureLayer(); pieLayer.ZoomLevelSet.ZoomLevel01.ApplyUntilZoomLevel = ApplyUntilZoomLevel.Level20; pieLayer.ZoomLevelSet.ZoomLevel01.DefaultAreaStyle = AreaStyles.CreateSimpleAreaStyle(GeoColor.FromArgb(100, GeoColor.StandardColors.Red)); mapEngine.DynamicLayers.Add("ellipseFeatureLayer", ellipseLayer); mapEngine.DynamicLayers.Add("pieFeatureLayer", pieLayer); comboBox1.SelectedIndex = 0; comboBox2.SelectedIndex = 1; DrawImage(); } private void comboBox1_SelectedIndexChanged(object sender, EventArgs e) { InMemoryFeatureLayer ellipseLayer = (InMemoryFeatureLayer)mapEngine.DynamicLayers["ellipseFeatureLayer"]; Feature ellipseFeature = ellipseLayer.InternalFeatures[0]; RingShape ellipseRingShape = ((PolygonShape)ellipseFeature.GetShape()).OuterRing; double startPositionAngle = 0.0; if (!string.IsNullOrEmpty(comboBox1.Text)) { startPositionAngle = Convert.ToDouble(comboBox1.Text); } double angle = 30; if (!string.IsNullOrEmpty(comboBox2.Text)) { angle = Convert.ToDouble(comboBox2.Text); } RingShape pieRingShape = GetRingShape(ellipseRingShape, startPositionAngle, angle); InMemoryFeatureLayer pieLayer = (InMemoryFeatureLayer)mapEngine.DynamicLayers["pieFeatureLayer"]; pieLayer.InternalFeatures.Clear(); pieLayer.InternalFeatures.Add(new Feature(pieRingShape)); DrawImage(); } private RingShape GetRingShape(RingShape ellipseRingShape, double angle) { return GetRingShape(ellipseRingShape, 0, angle); } private RingShape GetRingShape(RingShape ellipseRingShape, double startPositionAngle, double angle) { PointShape centerPointShape = ellipseRingShape.GetCenterPoint(); RingShape pieRingShape = new RingShape(); int startCount = (int)(ellipseRingShape.Vertices.Count * startPositionAngle / 360); int endCount = (int)(ellipseRingShape.Vertices.Count * (startPositionAngle + angle) / 360); int ellipseRingShapeVertexCount = ellipseRingShape.Vertices.Count; //If it is a circle, just ignore the center point. if (angle != 360) { pieRingShape.Vertices.Add(new Vertex(centerPointShape.X, centerPointShape.Y)); } //Add the point needed from the ellipse ring shape to the target shape. for (int i = startCount; i < endCount; i++) { pieRingShape.Vertices.Add(ellipseRingShape.Vertices[i|% ellipseRingShapeVertexCount]); } //If it is a circle, just ignore the center point. if (angle != 360) { pieRingShape.Vertices.Add(new Vertex(centerPointShape.X, centerPointShape.Y)); } return pieRingShape; } 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); } } }