private void gMapControl1_Load(object sender, EventArgs e)
{
// Initialize map
gmap.MapProvider = GMapProviders.GoogleHybridMap;
GMap.NET.GMaps.Instance.Mode = GMap.NET.AccessMode.ServerOnly;
// Setup base single ui crop
List <PointLatLng> uiCropPts = _properties[0].uiCrop;
// Iterate over each shapefile
foreach (CropProperties property in _properties)
{
gmap.Position = property.maxExtent;
gmap.MinZoom = 1;
gmap.MaxZoom = 24;
gmap.Zoom = 10;
gmap.ShowCenter = false;
// Initialize shapefile boundaries
List <PointLatLng> points = new List <PointLatLng>();
// Create polygons + add to map Lat = Y, Lng = X
points.Add(property.minExtent);
points.Add(new PointLatLng(property.maxExtent.Lat, property.minExtent.Lng));
points.Add(property.maxExtent);
points.Add(new PointLatLng(property.minExtent.Lat, property.maxExtent.Lng));
// Creates extents and style
GMapOverlay extentOverlay = new GMapOverlay("Extent overlay");
GMapPolygon polygon = new GMapPolygon(points, "Extents");
Color col = property.color;
polygon.Fill = new SolidBrush(Color.FromArgb(80, col.R, col.G, col.B));
polygon.Stroke = new Pen(Color.FromArgb(col.R, col.G, col.B), 2);
extentOverlay.Polygons.Add(polygon);
gmap.Overlays.Add(extentOverlay);
// Add colour and shapefile names to list view
ListViewItem item = new ListViewItem(property.shp.Name);
item.BackColor = Color.FromArgb(50, col.R, col.G, col.B);
item.Checked = true;
listView1.Items.Add(item);
}
// Create dynamic input crop
CropProperties firstCrop = _properties[0];
// Parametric input
if (firstCrop != null)
{
List <PointLatLng> cropPts = new List <PointLatLng>();
cropPts.Add(firstCrop.minCrop);
cropPts.Add(new PointLatLng(firstCrop.maxCrop.Lat, firstCrop.minCrop.Lng));
cropPts.Add(firstCrop.maxCrop);
cropPts.Add(new PointLatLng(firstCrop.minCrop.Lat, firstCrop.maxCrop.Lng));
// ADD POLYGON TO MAP
var rand = new Random();
GMapPolygon crop = new GMapPolygon(cropPts, "Crop");
crop.Fill = new SolidBrush(Color.FromArgb(80, Color.Red));
crop.Stroke = new Pen(Color.Red, 2);
cropOverlay.Polygons.Add(crop);
gmap.Overlays.Add(cropOverlay);
}
}
private void gmap_MouseClick(object sender, MouseEventArgs e)
{
// Setup map overlay
CropProperties crop = _properties[0];
List <PointLatLng> pts = crop.uiCrop;
// Register left mouse button
if (e.Button == System.Windows.Forms.MouseButtons.Left)
{
PointLatLng pt = gmap.FromLocalToLatLng(e.X, e.Y);
pts.Add(pt);
if (pts.Count > 2)
{
pts.Clear();
cropOverlay.Clear();
uiOverlay.Clear();
pts.Add(pt);
}
// Add a bounding box to map
if (crop.uiCrop.Count == 2)
{
// Reorder pts to ensure max and min are correct.
List <double> Lats = new List <double>();
List <double> Lngs = new List <double>();
Lats.Add(pts[0].Lat);
Lats.Add(pts[1].Lat);
Lngs.Add(pts[0].Lng);
Lngs.Add(pts[1].Lng);
Lats.Sort();
Lngs.Sort();
PointLatLng min = new PointLatLng(Lats[0], Lngs[0]);
PointLatLng max = new PointLatLng(Lats[1], Lngs[1]);
pts.Clear();
pts.Add(min);
pts.Add(max);
// Clear the overlay and create rectangle polygon
uiOverlay.Clear();
List <PointLatLng> finalPts = new List <PointLatLng>();
PointLatLng pt0 = pts[0];
PointLatLng pt1 = new PointLatLng(pts[1].Lat, pts[0].Lng);
PointLatLng pt2 = pts[1];
PointLatLng pt3 = new PointLatLng(pts[0].Lat, pts[1].Lng);
finalPts.Add(pt0);
finalPts.Add(pt1);
finalPts.Add(pt2);
finalPts.Add(pt3);
// Render the polygon
cropOverlay.Clear();
gmap.Overlays.Remove(uiOverlay);
GMapPolygon cropB = new GMapPolygon(finalPts, "Crop");
cropB.Fill = new SolidBrush(Color.FromArgb(80, Color.Red));
cropB.Stroke = new Pen(Color.Red, 4);
gmap.Overlays.Add(uiOverlay);
uiOverlay.Polygons.Add(cropB);
// Set the crop boundary max and min
foreach (CropProperties cropBoundary in _properties)
{
cropBoundary.minCrop = pt0;
cropBoundary.maxCrop = pt2;
}
}
}
}