private void FormXGIS_MouseClick(object sender, MouseEventArgs e)
{
if (layer.FeatureCount() == 0)
{
return;
}
XVertex onevertex = view.ToMapVertex(e.Location);
double mindistance = Double.MaxValue;
int findid = -1;
int index = 0;
foreach (XFeature feature in layer.Features)
{
double distance = feature.Distance(onevertex);
if (distance < mindistance)
{
mindistance = distance;
findid = index;
}
index++;
}
int ScreenDistance = view.ToScreenDistance(mindistance);
if (ScreenDistance < 5)
{
MessageBox.Show("找到的Feature的序号是" + findid);
}
}
internal void SelectByClick(Point location, XView view)
{
XVertex v = view.ToMapVertex(location);
foreach (XFeature feature in Features)
{
feature.Selected = false;
}
if (ShapeType == SHAPETYPE.point)
{
Double distance = Double.MaxValue;
int id = -1;
for (int i = 0; i < Features.Count; i++)
{
XPointSpatial point = (XPointSpatial)(Features[i].Spatial);
double dist = point.Distance(v);
if (dist < distance)
{
distance = dist;
id = i;
}
}
double scd = view.ToScreenDistance(v, Features[id].Spatial.Centroid);//转为屏幕距离
if (scd <= 5)
{
Features[id].Selected = true;
}
else
{
Console.WriteLine("屏幕距离为" + scd + ",选择无效!!");
}
}
else if (ShapeType == SHAPETYPE.line)
{
Double distance = Double.MaxValue;
int id = -1;
for (int i = 0; i < Features.Count; i++)
{
XLineSpatial line = (XLineSpatial)(Features[i].Spatial);
double dist = line.Distance(v);
if (dist < distance)
{
distance = dist;
id = i;
}
}
double scd = view.ToScreenDistance(distance);//转为屏幕距离
if (scd <= 5)
{
Features[id].Selected = true;
}
else
{
Console.WriteLine("屏幕距离为" + scd + ",选择无效!!");
}
}
else if (ShapeType == SHAPETYPE.polygon)
{
for (int i = 0; i < Features.Count; i++)
{
XPolygonSpatial polygon = (XPolygonSpatial)(Features[i].Spatial);
if (polygon.Incude(v))
{
Features[i].Selected = true;
}
}
}
}