private void Ellipse_MouseEnter(object sender, MouseEventArgs e)
{
var ellipse = (Ellipse)sender;
// the location to display the popup
var location = (Point)ellipse.Tag;
// create a new wpf text blox
var border = new Border {
BorderBrush = Brushes.Black, BorderThickness = new Thickness(2, 2, 1, 1)
};
var textBlock = new TextBlock
{
Padding = new Thickness(2),
Background = Brushes.Yellow,
Foreground = Brushes.Black,
Text = GeoTransform.LatLonToString(location.Y, location.X, true)
};
border.Child = textBlock;
popup.Child = border;
// get the MapView object from the control
var mapView = MapElementExtensions.FindChild <MapView>(Map);
// transform
var popupLocation = mapView.WgsToCanvas(Map, location);
popup.Placement = PlacementMode.RelativePoint;
popup.PlacementTarget = Map;
popup.HorizontalOffset = popupLocation.X;
popup.VerticalOffset = popupLocation.Y;
popup.IsOpen = true;
popup.StaysOpen = false;
}
/// <summary> Updates the text which is showing the current coordinates. </summary>
private void UpdateText()
{
if (!isActive)
{
return;
}
Point pixelPoint = Mouse.GetPosition(MapView);
Point wgsPoint = MapView.CanvasToWgs(MapView.Layers, pixelPoint);
if (wgsPoint.Y < -90 || wgsPoint.Y > 90 || wgsPoint.X < -180 || wgsPoint.X > 180)
{
CoordinatesText.Text = INVALID_COORD_TEXT;
}
else
{
switch (Map.CoordinateDiplayFormat)
{
case CoordinateDiplayFormat.Decimal:
CoordinatesText.Text = $"{wgsPoint.Y:.000000}°, {wgsPoint.X:.000000}°";
break;
case CoordinateDiplayFormat.Degree:
CoordinatesText.Text = GeoTransform.LatLonToString(wgsPoint.Y, wgsPoint.X, true);
break;
default:
throw new ArgumentOutOfRangeException();
}
}
}