private void mapControl_MouseDoubleClick(object sender, MouseEventArgs e)
{
if (checkBoxDrawPolygon.Checked && drawingPolygon != null)
{
polygons.Polygons.Add(drawingPolygon);
drawingPolygon = null;
drawingPoints.Clear();
}
else if (drawYuan.Checked)
{
yuanxingOverlay.Markers.Add(lastCircleMarker);
lastCircleMarker = null;
tempOverlay.Markers.Clear();
}
}
private void mapControl_MouseMove(object sender, MouseEventArgs e)
{
var point = MapControl.MousePosition;
latText.Text = e.X.ToString();
lngText.Text = e.Y.ToString();
if (drawYuan.Checked && e.Button == MouseButtons.Left)
{
lastPosition = mapControl.FromLocalToLatLng(e.X, e.Y);
tempOverlay.Markers.Clear(); //擦出掉以前的marker
//换算成以米为单位的距离
int radius = (int)distanceByMeter(lastPosition.Lng, lastPosition.Lat, latLng.Lng, latLng.Lat);
lastCircleMarker = new GMapMarkerCircle(latLng, radius);
lastCircleMarker.Fill = new SolidBrush(Color.FromArgb(50, Color.Red));
tempOverlay.Markers.Add(lastCircleMarker);
}
}