// 点的鼠标移动事件，如果是选中状态下，则拖动图元
private void gmapControl_MouseMovePoint(object sender, System.Windows.Forms.MouseEventArgs e)
{
//面移动
var lnglat = gmapControl.FromLocalToLatLng(e.X, e.Y);
int index = polygon.Points.FindIndex(o => o == currentPoint.Position);
if (index != -1)
{
polygon.Points[index] = lnglat;
}
//点移动
currentPoint.Position = lnglat;
gmapControl.UpdatePolygonLocalPosition(polygon);
}
/// <summary>
/// 计算各个定点位置并更新图元位置
/// </summary>
/// <param name="currPoint">当前点的位置</param>
private void CaluPointUpdatePositon(PointLatLng currPoint)
{
double distance = gmapControl.MapProvider.Projection.GetDistance(prevPoint, currPoint); // 计算距离
double bear = gmapControl.MapProvider.Projection.GetBearing(prevPoint, currPoint); // 计算方位角
List <PointLatLng> prevList = polygon.Points;
List <PointLatLng> currList = new List <PointLatLng>();
for (int i = 0; i < prevList.Count; i++)
{
PointLatLng newPoint = GetPointByDistanceAndAngle(distance, prevList[i], bear);
if (newPoint.Lng > 180 || newPoint.Lng < -180)
{
return;
}
if (newPoint.Lat > 90 || newPoint.Lat < -90)
{
return;
}
currList.Add(newPoint);
}
polygon.Points.Clear();
polygon.Points.AddRange(currList);
gmapControl.UpdatePolygonLocalPosition(polygon);
}
// 鼠标移动事件，如果是选中状态下，则拖动图元
private void gmapControl_MouseMove(object sender, System.Windows.Forms.MouseEventArgs e)
{
if (isMouseDown && currentPoint != null) // 调整大小
{
var lnglat = gmapControl.FromLocalToLatLng(e.X, e.Y);
int index = polygon.Points.FindIndex(o => o == currentPoint.Position);
if (index != -1)
{
polygon.Points[index] = lnglat;
currentPoint.Position = lnglat;
gmapControl.UpdatePolygonLocalPosition(polygon);
}
}
else if (isMouseDown && isSelectPolygon) // 整体移动
{
PointLatLng currPoint = gmapControl.FromLocalToLatLng(e.X, e.Y);
CaluPointUpdatePositon(currPoint); // 移动面图元
RemoveMarker();
AddMarker();
}
}
/// <summary>
/// 鼠标单击，开始测量
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void gmapControl_MouseDown(object sender, System.Windows.Forms.MouseEventArgs e)
{
if (e.Button == System.Windows.Forms.MouseButtons.Left)
{
if (isFinish == true)
{
ReleaseCommond();
return;
}
string name = string.Format("point_{0}", pointIndex);
var lngLat = gmapControl.FromLocalToLatLng(e.X, e.Y);
if (pointIndex == 0) // 第一个点生成面
{
//加点
marker = new EditMarker(lngLat);
gmapOverlay.Markers.Add(marker);
//多边形
pointList.Add(lngLat);
gmapPolygon = new GMapPolygon(pointList, PolygonName);
gmapOverlay.Polygons.Add(gmapPolygon);
gmapControl.UpdatePolygonLocalPosition(gmapPolygon);
pointIndex++;
}
else//面对象生成以后添加面的点
{
pointIndex++;
marker = new EditMarker(lngLat);
gmapOverlay.Markers.Add(marker);
pointList.Add(lngLat);
gmapPolygon.Points.Add(lngLat);
gmapControl.UpdatePolygonLocalPosition(gmapPolygon);
}
}
}
