Utilizzare una DrawingArea con gb.map anziché una MapView

Mostreremo di seguito un semplice codice esemplificativo, nel quale si farà uso di una DrawingArea anziché dell'oggetto MapView.

Bisognerà ovviamente attivare il Componente gb.map . ^{[Nota 1]}

Private DrawingArea1 As DrawingArea
Private hMap As New Map    
Private x As Integer
Private y As Integer
Private mp As New MapPoint(35.864483, 12.867534)
Private pt As New Point
 
 
Public Sub _New()    
 
 With hMap
   .AddTile("GoogleMaps", "https://khms{s}.google.it/kh/v={version}&src=app&x={x}&y={y}&z={z}&s=Galile", ["version": "900"]).SubDomains = ["0", "1", "2"]
   .Center = mp
 End With
 With Me  
   .W = Desktop.W
   .H = Desktop.H
   .Arrangement = Arrange.Fill
 End With
 With DrawingArea1 = New DrawingArea(Me) As "DrawingArea1"
   .X = 0
   .Y = 0
 End With
 
End
 
 
Public Sub Form_Open()
 
 hMap.Zoom = 6  
 Me.Text = "Zoom: " & CStr(6)
  
End
 
 
Public Sub DrawingArea1_Draw()
 
 With hMap
   .Width = Paint.W
   .Height = Paint.H
   .Center = mp
   .Draw()
 End With
 
 DrawingArea1.Refresh()
 
End
 
 
Public Sub DrawingArea1_MouseMove()  
 
 Dim c As New Single[18]
 Dim mx, my As Short
 
 c = [0, 0, 0, 0, 0, 5, 6.4, 7.6, 8.8, 9.9, 10.9, 11.9, 12.94, 13.96, 14.98, 15.98, 16.99, 17.994]
 
 mx = (x - Mouse.X)
 my = (y - Mouse.Y)
 
 With hMap  
   .Center.Lat -= ((my ^ 0) * my) / ((hMap.Zoom * 10) / (hMap.Zoom - c[hMap.Zoom - 1]))
   .Center.Lon += ((mx ^ 0) * mx) / ((hMap.Zoom * 10) / (hMap.Zoom - c[hMap.Zoom - 1]))
 End With
 
 x = Mouse.X  
 y = Mouse.Y  
 
End
 
 
Public Sub DrawingArea1_MouseDown()  
 
 pt = Point(Mouse.X, Mouse.Y)
 
 Me.Text = "Lat. " & Format(hMap.PixelToMapPointRel(pt).Lat, "0.000000") & 
           "   Lon. " & Format(hMap.PixelToMapPointRel(pt).Lon, "0.000000") &
           "  -  Zoom: " & CStr(hMap.Zoom)
 
 x = pt.X  
 y = pt.Y
 
End
 

Public Sub DrawingArea1_MouseWheel()
 
' Pone al centro della mappa il punto ove si è ruotata la rotellina: 
 pt = Point(Mouse.X, Mouse.Y)
 mp.Lat = hMap.PixelToMapPointRel(pt).Lat
 mp.Lon = hMap.PixelToMapPointRel(pt).Lon
 
' Valuta il verso della rotazione della rotellina: 
 If Mouse.Delta > 0 Then 
   hMap.Zoom += 1
 Else 
   hMap.Zoom -= 1
 Endif
 Me.Text = "Zoom: " & CStr(hMap.Zoom)
 
End

---

Note

[1] Qualora la mappa non appaia, verificare la versione GoogleMap, ed eventualmente modificarla in questo punto: ["version": "900"]
Al riguardo vedere: Conoscere la versione più recente di Google Maps satellite