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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 SelectVertices { 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.Collections.Generic; using System.Linq; using System.Text; using ThinkGeo.MapSuite.Core; using ThinkGeo.MapSuite.DesktopEdition; namespace SelectVertices { class SelectVerticesEditInteractiveOverlay : EditInteractiveOverlay { private PointStyle controlPointStyle; private PointStyle selectedControlPointStyle; public SelectVerticesEditInteractiveOverlay() : base() { //We add the column "IsSelected" to ExistingControlPointsLayer that will be used to keep track if the control point has been dragged. //Notice that the column "State" already exists. It is used for keeping tracked if the control point is being dragged. this.ExistingControlPointsLayer.Open(); this.ExistingControlPointsLayer.Columns.Add(new FeatureSourceColumn("IsSelected")); this.ExistingControlPointsLayer.Close(); } //Style for drawing a control point not selected public PointStyle ControlPointStyle { get { return controlPointStyle; } set { controlPointStyle = value; } } //Style for drawing a control point when selected (being dragged or after having being dragged) public PointStyle SelectedControlPointStyle { get { return selectedControlPointStyle; } set { selectedControlPointStyle = value; } } //Sets the column value for "IsSelected" to "true" if control point selected. protected override void OnControlPointSelected(ControlPointSelectedEditInteractiveOverlayEventArgs e) { base.OnControlPointSelected(e); foreach (Feature feature in this.ExistingControlPointsLayer.InternalFeatures) { if (feature.ColumnValues["State"] == "selected") { feature.ColumnValues["IsSelected"] = "true"; } } } //At the Mouse Up event, the features of ExistingControlPointsLayer will be cleared and new one will //be generated for better performance. So it is necessary to reupdate the column values of "IsSelected" to the new //ExistingControlPointsLayer. protected override InteractiveResult MouseUpCore(InteractionArguments interactionArguments) { Collection<int> draggedPointsIndex = new Collection<int>(); //Before the actual MouseUp event, we get the indexes of the features with value "true" of column "IsSelected". this.ExistingControlPointsLayer.Open(); Collection<Feature> draggedPoints = this.ExistingControlPointsLayer.QueryTools.GetAllFeatures(new string[] { "IsSelected" }); this.ExistingControlPointsLayer.Close(); for (int index = 0; index < draggedPoints.Count; index++) { if (draggedPoints[index].ColumnValues["IsSelected"] == "true") { draggedPointsIndex.Add(index); } } //The MouseUp is called clearing ExistingControlPointsLayer. (We do that for better performance) InteractiveResult interactiveResult = base.MouseUpCore(interactionArguments); //Now, we need to reset the column values of "IsSelected" for the relevant features. foreach (int index in draggedPointsIndex) { this.ExistingControlPointsLayer.InternalFeatures[index].ColumnValues["IsSelected"] = "true"; } this.ExistingControlPointsLayer.Close(); return interactiveResult; } //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(); //Gets the control points and draw its features according to the value of "IsSelected" column. this.ExistingControlPointsLayer.Open(); Collection<Feature> ExistingControlPoints = this.ExistingControlPointsLayer.QueryTools.GetAllFeatures(new string[1] { "IsSelected" }); ExistingControlPointsLayer.Close(); //Loops thru the control points features and check for the value of "IsSelected" collumn. foreach (Feature feature in ExistingControlPoints) { if (feature.ColumnValues.ContainsKey("IsSelected") && feature.ColumnValues["IsSelected"] == "true") { Feature[] features = new Feature[1] { feature }; selectedControlPointStyle.Draw(features, canvas, labelsInAllLayers, labelsInAllLayers); } else { Feature[] features = new Feature[1] { feature }; controlPointStyle.Draw(features, canvas, labelsInAllLayers, labelsInAllLayers); } } } } }
using System; using System.Windows.Forms; using System.Collections.ObjectModel; using System.IO; using ThinkGeo.MapSuite.Core; using ThinkGeo.MapSuite.DesktopEdition; namespace SelectVertices { public partial class TestForm : Form { public TestForm() { InitializeComponent(); } private void TestForm_Load(object sender, EventArgs e) { winformsMap1.MapUnit = GeographyUnit.DecimalDegree; winformsMap1.CurrentExtent = new RectangleShape(-97.755, 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. SelectVerticesEditInteractiveOverlay selectVerticesEditInteractiveOverlay = new SelectVerticesEditInteractiveOverlay(); selectVerticesEditInteractiveOverlay.EditShapesLayer.InternalFeatures.Add("Polygon", new Feature(BaseShape.CreateShapeFromWellKnownData(sr1.ReadLine()))); //Sets the PointStyle for the non dragged control points. selectVerticesEditInteractiveOverlay.ControlPointStyle = new PointStyle(PointSymbolType.Circle, new GeoSolidBrush(GeoColor.StandardColors.PaleGoldenrod), new GeoPen(GeoColor.StandardColors.Black), 8); //Sets the PointStyle for the dragged control points. selectVerticesEditInteractiveOverlay.SelectedControlPointStyle = new PointStyle(PointSymbolType.Circle, new GeoSolidBrush(GeoColor.StandardColors.Green), new GeoPen(GeoColor.StandardColors.DarkGreen, 2), 10); //LineShape snapping feature. LineShape snappingLineShape = (LineShape)BaseShape.CreateShapeFromWellKnownData(sr2.ReadLine()); selectVerticesEditInteractiveOverlay.CanAddVertex = false; selectVerticesEditInteractiveOverlay.CanDrag = false; selectVerticesEditInteractiveOverlay.CanRemoveVertex = false; selectVerticesEditInteractiveOverlay.CanResize = false; selectVerticesEditInteractiveOverlay.CanRotate = false; selectVerticesEditInteractiveOverlay.CalculateAllControlPoints(); winformsMap1.EditOverlay = selectVerticesEditInteractiveOverlay; //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(); } } }