/// <summary>
/// 创建线图元
/// </summary>
/// <param name="kml">kml对象</param>
/// <param name="gmapOverlay">图层</param>
/// <returns></returns>
public IMFElement CreateElement(Kml kml, GMapOverlay gmapOverlay)
{
KmlLineString line = kml.Placemark.Graph as KmlLineString;
if (line == null)
{
return(null);
}
if (line.PositionList == null || line.PositionList.Count == 0)
{
return(null);
}
// 画线
Line_GMap lineRoute = new Line_GMap(kml.Placemark.Name, line);
// 将图元添加到图层
if (gmapOverlay.Control.InvokeRequired)
{
gmapOverlay.Control.Invoke(new Action(delegate
{
gmapOverlay.Routes.Add(lineRoute);
}));
}
else
{
gmapOverlay.Routes.Add(lineRoute);
}
return(lineRoute);
}
/// <summary>
/// 释放资源
/// </summary>
public void Dispose()
{
ReleaseCommond();
gmapControl = null;
mapOverlay = null;
marker = null;
lineRoute = null;
}
/// <summary>
/// 释放资源
/// </summary>
public void Dispose()
{
ReleaseCommond();
CommondExecutedEvent = null;
gmapControl = null;
mapOverlay = null;
lineRoute = null;
marker = null;
markerList = null;
}
/// <summary>
/// 鼠标按下，绘制第一个点，并注册鼠标移动事件
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void gmapControl_MouseDown(object sender, MouseEventArgs e)
{
if (e.Button == MouseButtons.Left)
{
var lngLat = gmapControl.FromLocalToLatLng(e.X, e.Y);
if (index == 0)
{
//添加点
MapLngLat point = new MapLngLat(lngLat.Lng, lngLat.Lat);
marker = new EditMarker(lngLat);
marker.Tag = "点";
marker.ToolTipText = string.Format("起点\n经度：{0}\n纬度：{1}\n角度：{2}°", lngLat.Lng, lngLat.Lat, 0);
marker.ToolTipMode = MarkerTooltipMode.Always;
mapOverlay.Markers.Add(marker);
//添加线
KmlLineString linekml = new KmlLineString();
linekml.Color = Color.Green;
linekml.Width = 3;
List <MapLngLat> pList = new List <MapLngLat>();
pList.Add(new MapLngLat(lngLat.Lng, lngLat.Lat));
pList.Add(new MapLngLat(lngLat.Lng, lngLat.Lat));
linekml.PositionList = pList;
lineRoute = new Line_GMap("measure_Angle", linekml);
mapOverlay.Routes.Add(lineRoute);
pointList[0] = point;
//注册移动事件
gmapControl.MouseMove += new System.Windows.Forms.MouseEventHandler(gmapControl_MouseMove);
index++;
}
else if (index == 1)
{
index++;
gmapControl.MouseMove -= gmapControl_MouseMove;
RegistCommandExcuteEvent();
ReleaseCommond();//修改 陈静
}
else if (index == 2)
{
index = 0;
mapOverlay.Markers.Remove(marker);
mapOverlay.Routes.Remove(lineRoute);
}
}
}
/// <summary>
/// 鼠标单击，开始测量
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void gmapControl_MouseClick(object sender, MouseEventArgs e)
{
if (e.Button == MouseButtons.Left && gmapControl.CanDragMap == false)
{
if (isFinish == true)
{
foreach (var item in markerList)
{
mapOverlay.Markers.Remove(item);
}
mapOverlay.Routes.Remove(lineRoute);
isFinish = false;
//ReleaseCommond();
//return;
}
string name = string.Format("point_{0}", pointIndex);
var lngLat = gmapControl.FromLocalToLatLng(e.X, e.Y);
if (pointIndex == 0) // 第一个点
{
// 加点
marker = new EditMarker(lngLat);
marker.ToolTipMode = MarkerTooltipMode.Always;
marker.ToolTipText = string.Format("起点\n经度：{0}\n纬度：{1}\n", Math.Round(lngLat.Lng, 6), Math.Round(lngLat.Lat, 6));
mapOverlay.Markers.Add(marker);
marker.ToolTip.Format.Alignment = StringAlignment.Near;
// 加线
KmlLineString linekml = new KmlLineString();
linekml.Color = Color.Green;
linekml.Width = 3;
List <MapLngLat> pList = new List <MapLngLat>();
pList.Add(new MapLngLat(lngLat.Lng, lngLat.Lat));
linekml.PositionList = pList;
lineRoute = new Line_GMap("measure_line", linekml);
mapOverlay.Routes.Add(lineRoute);
pointIndex++;
}
else
{
pointIndex++;
// 添加点
lineRoute.Points.Add(lngLat);
lineRoute.AddPoint(new MapLngLat(lngLat.Lng, lngLat.Lat));
gmapControl.Refresh();
// 添加Marker
marker = new EditMarker(lngLat);
mapOverlay.Markers.Add(marker);
distance = lineRoute.Distance;
distance = Math.Round(distance, 3);
marker.ToolTipMode = MarkerTooltipMode.Always;
marker.ToolTipText = string.Format("点{0}\n经度：{1}\n纬度：{2}\n距离：{3}（公里）", pointIndex, Math.Round(lngLat.Lng, 6), Math.Round(lngLat.Lat, 6), distance);
marker.ToolTip.Format.Alignment = StringAlignment.Near;
}
markerList.Add(marker);
}
}
