====== Source Code DesktopEditionSample TrackOverlayWithEsc CS 090811.zip ======
====CustomTrackInteractiveOverlay.cs====
using ThinkGeo.MapSuite.DesktopEdition;
namespace TrackOverlayWithEscNew
{
///
/// This class is used to handle dismissing the trackshape. It also has a property to determine if you are in a trackshape operation. The Interactive click interval is changed because the is a discrepency between when the user clicks and the point is registerd when the vlaue is left at the default 500.
///
public class CustomTrackInteractiveOverlay : TrackInteractiveOverlay
{
private bool isTracking = false;
public CustomTrackInteractiveOverlay():base()
{
}
public bool IsTracking
{
get { return isTracking; }
}
public new void EndTracking()
{
base.EndTracking();
}
protected override void OnTrackStarted(TrackStartedTrackInteractiveOverlayEventArgs e)
{
InteractiveClickInterval = 400;
isTracking = true;
base.OnTrackStarted(e);
}
protected override void OnTrackEnded(TrackEndedTrackInteractiveOverlayEventArgs e)
{
InteractiveClickInterval = 1;
isTracking = false;
base.OnTrackEnded(e);
}
}
}
====Program.cs====
using System;
using System.Collections.Generic;
using System.Linq;
using System.Windows.Forms;
namespace TrackOverlayWithEscNew
{
static class Program
{
///
/// The main entry point for the application.
///
[STAThread]
static void Main()
{
Application.EnableVisualStyles();
Application.SetCompatibleTextRenderingDefault(false);
Application.Run(new TestForm());
}
}
}
====TestForm.cs====
using System;
using System.Windows.Forms;
using System.Collections.ObjectModel;
using ThinkGeo.MapSuite.Core;
using ThinkGeo.MapSuite.DesktopEdition;
namespace TrackOverlayWithEscNew
{
public partial class TestForm : Form
{
public TestForm()
{
InitializeComponent();
}
private void TestForm_Load(object sender, EventArgs e)
{
winformsMap1.MapUnit = GeographyUnit.DecimalDegree;
winformsMap1.TrackOverlay = new CustomTrackInteractiveOverlay();
winformsMap1.TrackOverlay.TrackEnded += new EventHandler(TrackOverlay_TrackEnded);
winformsMap1.KeyDown += new KeyEventHandler(winformsMap1_KeyDown);
winformsMap1.TrackOverlay.TrackMode = TrackMode.Polygon;
//setting the interactiveclick interval here ensures the first point is set in the proper location. After the trackshape is started, the value is set to 400 in the customtrackoverlay.
InteractiveOverlay.InteractiveClickInterval = 1;
//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);
winformsMap1.Refresh();
}
void winformsMap1_KeyDown(object sender, KeyEventArgs e)
{
switch (e.KeyCode)
{
case Keys.Escape: //cancels the current lasso operation
TrackOverlayCancelled();
break;
}
}
void TrackOverlay_TrackEnded(object sender, TrackEndedTrackInteractiveOverlayEventArgs e)
{
//setting the interactiveclick interval here ensures the first point is set in the proper location. After the trackshape is started, the value is set to 400 in the customtrackoverlay.
InteractiveOverlay.InteractiveClickInterval = 1;
}
///
/// Cancels the current lasso operation
///
private void TrackOverlayCancelled()
{
ClearTrackingLayer();
if (winformsMap1.TrackOverlay.TrackMode == TrackMode.Polygon ||
winformsMap1.TrackOverlay.TrackMode == TrackMode.Line)
{ //we are using a custom overlay to handle this
((CustomTrackInteractiveOverlay)winformsMap1.TrackOverlay).EndTracking();
winformsMap1.TrackOverlay.MouseDoubleClick(new InteractionArguments());
}
else
{
winformsMap1.TrackOverlay.MouseUp(new InteractionArguments());
}
winformsMap1.Refresh();
}
private void ClearTrackingLayer()
{
winformsMap1.TrackOverlay.Lock.EnterWriteLock();
try
{
int count = winformsMap1.TrackOverlay.TrackShapeLayer.InternalFeatures.Count;
if (count > 0)
{
winformsMap1.TrackOverlay.TrackShapeLayer.InternalFeatures.Clear();
}
}
finally
{
winformsMap1.TrackOverlay.Lock.ExitWriteLock();
}
}
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();
}
}
}