====== Source Code DesktopEditionSample ZoomInToPoint CS 091106.zip ======


====Program.cs====

<code csharp>
using System;
using System.Collections.Generic;
using System.Linq;
using System.Windows.Forms;
namespace ZoomInToPoint
{
    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());
        }
    }
}
</code>



====TestForm.cs====

<code csharp>
using System;
using System.Windows.Forms;
using ThinkGeo.MapSuite.Core;
namespace  ZoomInToPoint
{
    public partial class TestForm : Form
    {
        public TestForm()
        {
            InitializeComponent();
        }
        private void TestForm_Load(object sender, EventArgs e)
        {
            winformsMap1.MapUnit = GeographyUnit.DecimalDegree;
            winformsMap1.CurrentExtent = new RectangleShape(-125, 47, -67, 25);
            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);
            //Adds the ZoomInToPointInteractiveOverlay to the InteractiveOverlays collection of the map.
            winformsMap1.InteractiveOverlays.Clear();
            ZoomInToPointInteractiveOverlay zoomInToPointInteractiveOverlay = new ZoomInToPointInteractiveOverlay();
            winformsMap1.InteractiveOverlays.Add(zoomInToPointInteractiveOverlay);

            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();
        }
    }
}
</code>



====ZoomInToPointInteractiveOverlay.cs====

<code csharp>
using ThinkGeo.MapSuite.Core;
using ThinkGeo.MapSuite.DesktopEdition;
namespace ZoomInToPoint
{
    class ZoomInToPointInteractiveOverlay: InteractiveOverlay
    {
        //We override the MouseClickCore method to have the map centered and zoomed in to the location
        //where the user click.
        private InMemoryFeatureLayer iM = null;
        protected override InteractiveResult MouseDownCore(InteractionArguments interactionArguments)
        {
            return base.MouseDownCore(interactionArguments);
        }
        protected override InteractiveResult MouseMoveCore(InteractionArguments interactionArguments)
        {
            //return base.MouseMoveCore(interactionArguments);
            InteractiveResult interactiveResult = new InteractiveResult();
            interactiveResult.DrawThisOverlay = InteractiveOverlayDrawType.Draw;
            interactiveResult.ProcessOtherOverlays = ProcessOtherOverlaysMode.DoNotProcessOtherOverlays;
            return interactiveResult;
        }
        //We override the MouseClickCore method to have the map centered and zoomed in to the location
        //where the user click.
        protected override InteractiveResult MouseClickCore(InteractionArguments interactionArguments)
        {
           InteractiveResult interactiveResult = new InteractiveResult();
           //Calculates the offset in X and Y to center the map.
            PointShape centerPointShape = interactionArguments.CurrentExtent.GetCenterPoint();
            PointShape newPointShape = new PointShape(interactionArguments.WorldX, interactionArguments.WorldY);
            double XOffset = newPointShape.X - centerPointShape.X;
            double YOffset = newPointShape.Y - centerPointShape.Y;
            RectangleShape newExtent = (RectangleShape)interactionArguments.CurrentExtent.CloneDeep();
            newExtent.TranslateByOffset(XOffset, YOffset);
            //Scales down the offset rectangle to have it set as the new extent of the map for zooming in.
            RectangleShape scaledDownRectangleShape = RectangleShape.ScaleDown(newExtent, 85).GetBoundingBox();
            interactiveResult.NewCurrentExtent = scaledDownRectangleShape;
            interactiveResult.ProcessOtherOverlays = ProcessOtherOverlaysMode.DoNotProcessOtherOverlays;
            interactiveResult.DrawThisOverlay = InteractiveOverlayDrawType.Draw;
            return interactiveResult;
        }
        protected override void DrawCore(GeoCanvas canvas)
        {
            //base.DrawCore(canvas);
           //iM.Draw(GeoCanvas, new System.Collections.ObjectModel.Collection<SimpleCandidate>
        }
    }
}</code>