using System.Collections.ObjectModel;  
 using System.Drawing;  
 using System.Windows.Forms;  
 using System.Collections.Generic;  
 using ThinkGeo.MapSuite.Core;  
 using ThinkGeo.MapSuite.DesktopEdition;  
 
 namespace DraggedPointStyleAdvanced  
 {  
     class DragInteractiveOverlayAdvanced : EditInteractiveOverlay  
     {  
         private PointStyle controlPointStyle;  
         private PointStyle draggedControlPointStyle;  
         private PointStyle draggedControlPointStyleWithShiftKey;  
         private bool IsShiftKeyDown = false;  
         private Feature snappingFeature;  
         private Collection<Feature> controlPoints;  
 
         public DragInteractiveOverlayAdvanced()  
             : base()  
         {  
             ExistingControlPointsLayer.Open();  
             ExistingControlPointsLayer.Columns.Add(new FeatureSourceColumn("nodetype"));  
             ExistingControlPointsLayer.Close();  
         }  
 
         public Feature SnappingFeature  
         {  
             get { return snappingFeature; }  
             set { snappingFeature = value; }  
         }  
 
         public PointStyle ControlPointStyle  
         {  
             get { return controlPointStyle; }  
             set { controlPointStyle = value; }  
         }  
 
         public PointStyle DraggedControlPointStyle  
         {  
             get { return draggedControlPointStyle; }  
             set { draggedControlPointStyle = value; }  
         }  
 
         public PointStyle DraggedControlPointStyleWithShiftKey  
         {  
             get { return draggedControlPointStyleWithShiftKey; }  
             set { draggedControlPointStyleWithShiftKey = value; }  
         }  
 
         protected override InteractiveResult KeyDownCore(KeyEventInteractionArguments interactionArguments)  
         {  
             IsShiftKeyDown = interactionArguments.IsShiftKeyPressed;  
             return base.KeyDownCore(interactionArguments);  
         }  
 
         protected override InteractiveResult KeyUpCore(KeyEventInteractionArguments interactionArguments)  
         {  
             IsShiftKeyDown = interactionArguments.IsShiftKeyPressed;  
             return base.KeyUpCore(interactionArguments);  
         }  
 
         protected override InteractiveResult MouseUpCore(InteractionArguments interactionArguments)  
         {  
             if (IsShiftKeyDown == true)  
             {  
                 PolygonShape newPolygonShape = (PolygonShape)EditShapesLayer.InternalFeatures[0].GetShape();  
                 RingShape ringShape = new RingShape();  
 
                 foreach (Feature feature in controlPoints)  
                 {  
                     PointShape controlPointShape = (PointShape)feature.GetShape();  
                     if (feature.ColumnValues["nodetype"] == "special")  
                     {  
                         BaseShape baseShape = snappingFeature.GetShape();  
                         PointShape pointShape = baseShape.GetClosestPointTo(controlPointShape, GeographyUnit.DecimalDegree);  
                         ringShape.Vertices.Add(new Vertex(pointShape.X, pointShape.Y));  
                     }  
                     else  
                     {  
                         ringShape.Vertices.Add(new Vertex(controlPointShape.X, controlPointShape.Y));  
                     }  
                 }  
 
                 newPolygonShape.OuterRing = ringShape;  
 
                 Feature newFeature = new Feature(newPolygonShape, EditShapesLayer.InternalFeatures[0].ColumnValues);  
 
                 EditShapesLayer.Open();  
                 EditShapesLayer.EditTools.BeginTransaction();  
                 EditShapesLayer.InternalFeatures.Clear();  
                 EditShapesLayer.InternalFeatures.Add(newFeature);  
                 EditShapesLayer.EditTools.CommitTransaction();  
                 EditShapesLayer.Close();  
 
             }  
             return base.MouseUpCore(interactionArguments);  
         }  
 
         //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();  
             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 };  
                     if (IsShiftKeyDown == false)  
                     {  
                         feature.ColumnValues["nodetype"] = "normal";  
                         draggedControlPointStyle.Draw(features, canvas, labelsInAllLayers, labelsInAllLayers);  
                     }  
                     else  
                     {  
                         feature.ColumnValues["nodetype"] = "special";  
                         draggedControlPointStyleWithShiftKey.Draw(features, canvas, labelsInAllLayers, labelsInAllLayers);  
                     }  
                 }  
             }  
         }  
     }  
 }  
 

using System;  
 using System.Collections.Generic;  
 using System.Linq;  
 using System.Windows.Forms;  
 
 namespace DraggedPointStyleAdvanced  
 {  
     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  DraggedPointStyleAdvanced  
 {  
     public partial class TestForm : Form  
     {  
         public TestForm()  
         {  
             InitializeComponent();  
         }  
 
         private void TestForm_Load(object sender, EventArgs e)  
         {  
             label1.Text = "Drag vertex of the polygon. Hold Shift key and release mouse button to have the vertex snapping to the line.";  
 
             winformsMap1.MapUnit = GeographyUnit.DecimalDegree;  
             winformsMap1.CurrentExtent = new RectangleShape(-97.755,30.319,-97.7266,30.3018);  
             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.  
             DragInteractiveOverlayAdvanced dragInteractiveOverlay = new DragInteractiveOverlayAdvanced();  
             dragInteractiveOverlay.EditShapesLayer.InternalFeatures.Add("Polygon", new Feature(BaseShape.CreateShapeFromWellKnownData(sr1.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.Green), new GeoPen(GeoColor.StandardColors.DarkGreen,2), 10);  
             //Sets the PointStyle for the dragged control points when shit key pressed.  
             dragInteractiveOverlay.DraggedControlPointStyleWithShiftKey = new PointStyle(PointSymbolType.Circle, new GeoSolidBrush(GeoColor.StandardColors.Red), new GeoPen(GeoColor.StandardColors.Orange, 2), 10);  
             //LineShape snapping feature.  
            LineShape snappingLineShape = (LineShape)BaseShape.CreateShapeFromWellKnownData(sr2.ReadLine());  
            dragInteractiveOverlay.SnappingFeature = new Feature(snappingLineShape);  
 
             dragInteractiveOverlay.CanAddVertex = false;  
             dragInteractiveOverlay.CanDrag = false;  
             dragInteractiveOverlay.CanRemoveVertex = false;  
             dragInteractiveOverlay.CanResize = false;  
             dragInteractiveOverlay.CanRotate = false;  
             dragInteractiveOverlay.CalculateAllControlPoints();  
 
             winformsMap1.EditOverlay = dragInteractiveOverlay;  
 
             //Regular InMemoryFeatureLayer for displaying line snapping feature.  
             InMemoryFeatureLayer inMemoryFeatureLayer = new InMemoryFeatureLayer();  
             inMemoryFeatureLayer.ZoomLevelSet.ZoomLevel01.DefaultLineStyle = LineStyles.CreateSimpleLineStyle(GeoColor.StandardColors.Red, 4, true);  
             inMemoryFeatureLayer.ZoomLevelSet.ZoomLevel01.ApplyUntilZoomLevel = ApplyUntilZoomLevel.Level20;  
             inMemoryFeatureLayer.InternalFeatures.Add(new Feature(snappingLineShape));  
 
             LayerOverlay layerOverlay = new LayerOverlay();  
             layerOverlay.Layers.Add(inMemoryFeatureLayer);  
             winformsMap1.Overlays.Add(layerOverlay);  
 
             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();  
         }  
     }  
 }