Source Code DesktopEditionSample DraggedPointStyleWithLabel CS 100120.zip

using System.Collections.ObjectModel;  
 using System.Drawing;  
 using System.Windows.Forms;  
 using System.Collections.Generic;  
 using ThinkGeo.MapSuite.Core;  
 using ThinkGeo.MapSuite.DesktopEdition;  
 
 namespace DraggedPointStyleWithLabel  
 {  
     class DragInteractiveOverlay : EditInteractiveOverlay  
     {  
         private PointStyle controlPointStyle;  
         private PointStyle draggedControlPointStyle;  
         private BaseShape referenceShape;  
 
         public PointStyle ControlPointStyle  
         {  
             get { return controlPointStyle; }  
             set { controlPointStyle = value; }  
         }  
 
         public PointStyle DraggedControlPointStyle  
         {  
             get { return draggedControlPointStyle; }  
             set { draggedControlPointStyle = value; }  
         }  
 
         public BaseShape ReferenceShape  
         {  
             get { return referenceShape; }  
             set { referenceShape = value; }  
         }  
 
         //Overrides the DrawCore function.  
         protected override void DrawCore(GeoCanvas canvas)  
         {  
             //Draws the Edit Shapes as default.  
             Collection<SimpleCandidate> labelsInAllLayers = new Collection<SimpleCandidate>();  
             EditShapesLayer.Open();  
             EditShapesLayer.Draw(canvas, labelsInAllLayers);  
             canvas.Flush();  
 
             //Draws the control points.  
             ExistingControlPointsLayer.Open();  
             Collection<Feature> controlPoints = ExistingControlPointsLayer.FeatureSource.GetAllFeatures(ReturningColumnsType.AllColumns);  
 
             //Loops thru the control points.  
             foreach (Feature feature in controlPoints)  
             {  
                 //Looks at the value of "state" to draw the control point as dragged or not.  
                 if (feature.ColumnValues["state"] != "selected")  
                 {  
                     Feature[] features = new Feature[1] { feature };  
                     controlPointStyle.Draw(features, canvas, labelsInAllLayers, labelsInAllLayers);  
                 }  
                 else  
                 {  
                     Feature[] features = new Feature[1] { feature };  
                     draggedControlPointStyle.Draw(features, canvas, labelsInAllLayers, labelsInAllLayers);  
 
                     PointShape pointShape = feature.GetShape() as PointShape;  
                     PointShape closestPointShape = referenceShape.GetClosestPointTo(pointShape, GeographyUnit.DecimalDegree);  
                     //Draws the closest point on the reference shape and the distance to it from the dragged control point.  
                     if (closestPointShape != null)  
                     {  
                         double Dist = System.Math.Round(closestPointShape.GetDistanceTo(pointShape, GeographyUnit.DecimalDegree, DistanceUnit.Meter));  
                         ScreenPointF ScreenPointF = ExtentHelper.ToScreenCoordinate(canvas.CurrentWorldExtent, pointShape, canvas.Width, canvas.Height);  
                         canvas.DrawTextWithScreenCoordinate(System.Convert.ToString(Dist) + " m", new GeoFont("Arial", 12, DrawingFontStyles.Bold), new GeoSolidBrush(GeoColor.StandardColors.Black),  
                                                           ScreenPointF.X + 35, ScreenPointF.Y, DrawingLevel.LabelLevel);  
                         canvas.DrawEllipse(closestPointShape, 12, 12, new GeoSolidBrush(GeoColor.StandardColors.Purple), DrawingLevel.LevelFour);  
                      }  
                 }  
             }  
         }  
      }  
  }  
 

using System;  
 using System.Collections.Generic;  
 using System.Linq;  
 using System.Windows.Forms;  
 
 namespace DraggedPointStyleWithLabel  
 {  
     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.Windows.Forms;  
 using System.Collections.ObjectModel;  
 using System.IO;  
 using ThinkGeo.MapSuite.Core;  
 using ThinkGeo.MapSuite.DesktopEdition;  
 
 
 namespace  DraggedPointStyleWithLabel  
 {  
     public partial class TestForm : Form  
     {  
         public TestForm()  
         {  
             InitializeComponent();  
         }  
 
         private void TestForm_Load(object sender, EventArgs e)  
         {  
             winformsMap1.MapUnit = GeographyUnit.DecimalDegree;  
             winformsMap1.CurrentExtent = new RectangleShape(-97.7591, 30.3126, -97.7317, 30.2964);  
             winformsMap1.BackgroundOverlay.BackgroundBrush = new GeoSolidBrush(GeoColor.FromArgb(255, 198, 255, 255));  
 
             //Displays the World Map Kit as a background.  
             ThinkGeo.MapSuite.DesktopEdition.WorldMapKitWmsDesktopOverlay worldMapKitDesktopOverlay = new ThinkGeo.MapSuite.DesktopEdition.WorldMapKitWmsDesktopOverlay();  
             winformsMap1.Overlays.Add(worldMapKitDesktopOverlay);  
 
             string fileName1 = @"..\..\data\polygon.txt";  
             StreamReader sr1 = new StreamReader(fileName1);  
 
             string fileName2 = @"..\..\data\line.txt";  
             StreamReader sr2 = new StreamReader(fileName2);  
 
             //DragtInteractiveOverlay for setting the PointStyles of the control points and dragged points.  
             DragInteractiveOverlay dragInteractiveOverlay = new DragInteractiveOverlay();  
             dragInteractiveOverlay.ReferenceShape = BaseShape.CreateShapeFromWellKnownData(sr1.ReadLine());  
             dragInteractiveOverlay.EditShapesLayer.InternalFeatures.Add("MultiLine", new Feature(BaseShape.CreateShapeFromWellKnownData(sr2.ReadLine())));  
 
             //Sets the PointStyle for the non dragged control points.  
             dragInteractiveOverlay.ControlPointStyle = new PointStyle(PointSymbolType.Circle, new GeoSolidBrush(GeoColor.StandardColors.PaleGoldenrod), new GeoPen(GeoColor.StandardColors.Black), 8);  
             //Sets the PointStyle for the dragged control points.  
             dragInteractiveOverlay.DraggedControlPointStyle = new PointStyle(PointSymbolType.Circle, new GeoSolidBrush(GeoColor.StandardColors.Red), new GeoPen(GeoColor.StandardColors.Orange, 2), 10);  
 
             // Add the point feature and specify text style.  
             dragInteractiveOverlay.EditShapesLayer.ZoomLevelSet.ZoomLevel01.DefaultTextStyle = new TextStyle("LabelColumn", new GeoFont("Arial", 12), new GeoSolidBrush(GeoColor.SimpleColors.Black));  
 
             dragInteractiveOverlay.CanAddVertex = false;  
             dragInteractiveOverlay.CanDrag = false;  
             dragInteractiveOverlay.CanRemoveVertex = false;  
             dragInteractiveOverlay.CanResize = false;  
             dragInteractiveOverlay.CanRotate = false;  
             dragInteractiveOverlay.CalculateAllControlPoints();  
 
             winformsMap1.EditOverlay = dragInteractiveOverlay;  
 
 
             //InMemoryFeatureLayer for the geometry of the reference shape  
             InMemoryFeatureLayer inMemoryFeatureLayer = new InMemoryFeatureLayer();  
             inMemoryFeatureLayer.ZoomLevelSet.ZoomLevel01.DefaultAreaStyle = AreaStyles.CreateSimpleAreaStyle(GeoColor.StandardColors.Red, GeoColor.StandardColors.Black);  
             inMemoryFeatureLayer.ZoomLevelSet.ZoomLevel01.ApplyUntilZoomLevel = ApplyUntilZoomLevel.Level20;  
 
             Feature newFeature = new Feature(dragInteractiveOverlay.ReferenceShape );  
 
             inMemoryFeatureLayer.Open();  
             inMemoryFeatureLayer.EditTools.BeginTransaction();  
             inMemoryFeatureLayer.EditTools.Add(newFeature);  
             inMemoryFeatureLayer.EditTools.CommitTransaction();  
             inMemoryFeatureLayer.Close();  
 
             LayerOverlay referenceOverlay = new LayerOverlay();  
             referenceOverlay.Layers.Add("Reference", inMemoryFeatureLayer);  
 
             winformsMap1.Overlays.Add(referenceOverlay);  
 
             winformsMap1.Refresh();  
         }  
 
 
         private void winformsMap1_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(winformsMap1.CurrentExtent, new ScreenPointF(e.X, e.Y), winformsMap1.Width, winformsMap1.Height);  
 
             //Displays world coordinates.  
             statusStrip1.Items["toolStripStatusLabelWorld"].Text = "(world) X:" + Math.Round(pointShape.X, 4) + " Y:" + Math.Round(pointShape.Y, 4);  
         }  
 
         private void btnClose_Click(object sender, EventArgs e)  
         {  
             this.Close();  
         }  
 
     }  
 }