Map Your Apps: Listing 3.

Handling the double-click event.Handling the double-click event.

private void map_MouseDoubleClick(object sender, MouseButtonEventArgs e)
{
  e.Handled = true;
  listBox1.Items.Add("Map double-click occurred");

  Point p0 = e.GetPosition(this);
  Point p1 = new Point(p0.X - 300, p0.Y); 
  Location loc1 = myMap.ViewportPointToLocation(p1);

  listBox1.Items.Add("Click window XY = " + p0.X + "," + p0.Y);
  listBox1.Items.Add("Click map XY = " + p1.X + "," + p1.Y);
  listBox1.Items.Add("Click lat-lon = " + loc1.Latitude.ToString("F4") + ","
    + loc1.Longitude.ToString("F4"));
  listBox1.Items.Add("");

  PlaceDot(loc1, Colors.Red);
  listBox1.Items.Add("Placing red dot at mouse-click");

  Point p2 = new Point(p1.X + 150, p1.Y + 100);
  Location loc2 = myMap.ViewportPointToLocation(p2); 
  PlaceDot(loc2, Colors.Cyan);
  listBox1.Items.Add("Placing cyan second dot to right and lower");

  Point p3 = new Point(p1.X + 150, p1.Y - 100);
  Location loc3 = myMap.ViewportPointToLocation(p3);
  PlaceDot(loc3, Colors.Cyan);
  listBox1.Items.Add("Placing cyan third dot to right and higher");
  listBox1.Items.Add("");

  DrawLine(loc1, loc2);
  listBox1.Items.Add("Drawing solid line from first to second dot");
  listBox1.Items.Add("");

  DrawCurve(loc1, loc3);
  DrawCurve(loc3, loc1);
  listBox1.Items.Add("Drawing dashed curve from first to third dot");
  listBox1.Items.Add("Drawing dashed curve from third to first dot");
  listBox1.Items.Add("");
}

About the Author

Dr. James McCaffrey works for Microsoft Research in Redmond, Wash. He has worked on several Microsoft products including Azure and Bing. James can be reached at jamcca[email protected].

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