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| Riga 1: |
Riga 1: |
| − | Mostreremo di seguito un semplice codice esemplificativo, nel quale si farà uso di una ''DrawingArea'' <B><SUP>[[[#Note|Nota 1]]]</sup></b> anziché dell'oggetto ''MapView''.
| + | #REDIRECT [[Utilizzare_una_DrawingArea_o_una_ImageView_con_gb.map_anziché_una_MapView]] |
| − | | |
| − | Bisognerà ovviamente attivare il Componente ''gb.map'' .
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| − | Private DrawingArea1 As DrawingArea
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| − | Private hMap As New Map
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| − | Private x As Integer
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| − | Private y As Integer
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| − | Private mp As New MapPoint(35.864483, 12.867534)
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| − | Private pt As New Point
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| − |
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| − |
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| − | '''Public''' Sub _New()
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| − |
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| − | With hMap
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| − | .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"] ' <SUP>[[[#Note|Nota 2]]]</sup>
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| − | .Center = mp
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| − | End With
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| − | With Me
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| − | .W = Desktop.W
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| − | .H = Desktop.H
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| − | .Arrangement = Arrange.Fill
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| − | End With
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| − | With DrawingArea1 = New DrawingArea(Me) As "DrawingArea1"
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| − | .X = 0
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| − | .Y = 0
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| − | End With
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| − |
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| − | '''End'''
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| − |
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| − |
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| − | '''Public''' Sub Form_Open()
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| − |
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| − | hMap.Zoom = 6
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| − | Me.Text = "Zoom: " & CStr(6)
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| − |
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| − | '''End'''
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| − |
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| − |
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| − | '''Public''' Sub DrawingArea1_Draw()
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| − |
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| − | With hMap
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| − | .Width = Paint.W
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| − | .Height = Paint.H
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| − | .Center = mp
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| − | .Draw()
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| − | End With
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| − |
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| − | DrawingArea1.Refresh()
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| − |
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| − | '''End'''
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| − |
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| − |
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| − | '''Public''' Sub DrawingArea1_MouseMove()
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| − |
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| − | Dim mx, my As Short
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| − | <FONT Color=gray>' ''Si impostano le seguenti costanti, per consentire uno spostamento morbido della mappa per ciascun livello di zoom:''</font>
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| − | Dim s As Single[] = [0.1, 0.1, 0.028, 0.04, 0.064, 0.106, 0.182, 0.32, 0.56, 1.05, 1.9, 3.4, 6.3, 11.6, 21.6, 40.5, 76, 144]
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| − |
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| − | mx = (x - Mouse.X)
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| − | my = (y - Mouse.Y)
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| − |
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| − | With hMap
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| − | .Center.Lat -= ((my ^ 0) * my) / (98 * hMap.Zoom * s[hMap.Zoom - 1])
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| − | .Center.Lon += ((mx ^ 0) * mx) / (72 * hMap.Zoom * s[hMap.Zoom - 1])
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| − | End With
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| − |
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| − | x = Mouse.X
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| − | y = Mouse.Y
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| − |
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| − | '''End'''
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| − |
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| − |
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| − | '''Public''' Sub DrawingArea1_MouseDown()
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| − |
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| − | pt = Point(Mouse.X, Mouse.Y)
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| − |
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| − | Me.Text = "Lat. " & Format(hMap.PixelToMapPointRel(pt).Lat, "0.000000") &
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| − | " Lon. " & Format(hMap.PixelToMapPointRel(pt).Lon, "0.000000") &
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| − | " - Zoom: " & CStr(hMap.Zoom)
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| − |
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| − | x = pt.X
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| − | y = pt.Y
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| − |
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| − | <FONT Color=gray>' ''Se si clicca sulla mappa con il tasto centrale, viene creato un file immagine della mappa corrente mostrata:''</font> ' <SUP>[[[#Note|Nota 3]]]</sup>
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| − | If Mouse.Middle Then
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| − | Dim im As New Image(mappa.Width, mappa.Height, Color.Transparent, Image.Standard)
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| − | With Paint
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| − | .Begin(im)
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| − | mappa.Draw()
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| − | .End
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| − | End With
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| − | im.Save("/tmp/immagine.png", 100)
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| − | Endif
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| − |
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| − | '''End'''
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| − |
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| − |
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| − | '''Public''' Sub DrawingArea1_MouseWheel()
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| − |
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| − | <FONT Color=gray>' ''Pone al centro della mappa il punto ove si è ruotata la rotellina:''</font>
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| − | pt = Point(Mouse.X, Mouse.Y)
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| − | mp.Lat = hMap.PixelToMapPointRel(pt).Lat
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| − | mp.Lon = hMap.PixelToMapPointRel(pt).Lon
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| − |
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| − | <FONT Color=gray>' ''Valuta il verso della rotazione della rotellina:''</font>
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| − | If Mouse.Delta > 0 Then
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| − | hMap.Zoom += 1
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| − | Else
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| − | hMap.Zoom -= 1
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| − | Endif
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| − | Me.Text = "Zoom: " & CStr(hMap.Zoom)
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| − |
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| − | '''End'''
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| − | | |
| − | | |
| − | ----
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| − | =Note=
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| − | [1] E' possibile utilizzare anche altre superfici, come ad esempio una ''ImageView'':
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| − | Private mappa As New Map
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| − | Private mp As New MapPoint(41.9, 12.5)
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| − | Private pt As New Point
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| − | Private x As Short
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| − | Private y As Short
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| − |
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| − | Public Sub _New()
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| − |
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| − | With mappa
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| − | .AddTile("Opentopomap", "https://khms{s}.google.it/kh/v={version}&src=app&x={x}&y={y}&z={z}&s=Galile", ["version": "900"]).SubDomains = ["0", "1", "2"]
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| − | .Center = mp
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| − | .Zoom = 15
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| − | End With
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| − | With Me
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| − | .W = Screen.AvailableWidth
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| − | .H = Screen.AvailableHeight
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| − | .Arrangement = Arrange.Fill
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| − | .Text = "Zoom: 15"
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| − | End With
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| − |
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| − | End
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| − |
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| − | Public Sub ImageView1_Draw(View As Image)
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| − |
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| − | With mappa
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| − | .Width = Paint.W
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| − | .Height = Paint.H
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| − | .Center = mp
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| − | .Draw()
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| − | End With
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| − |
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| − | ImageView1.Refresh()
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| − |
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| − | End
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| − |
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| − | Public Sub ImageView1_MouseWheel()
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| − |
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| − | pt = Point(Mouse.X, Mouse.Y)
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| − | mp.Lat = mappa.PixelToMapPointRel(pt).Lat
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| − | mp.Lon = mappa.PixelToMapPointRel(pt).Lon
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| − |
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| − | Select Case Mouse.Delta
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| − | Case 1
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| − | mappa.Zoom += 1
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| − | Case -1
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| − | mappa.Zoom -= 1
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| − | End Select
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| − |
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| − | Me.Text = "Zoom: " & CStr(mappa.Zoom)
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| − |
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| − | End
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| − |
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| − | Public Sub ImageView1_MouseMove()
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| − |
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| − | Dim mx, my As Short
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| − | Dim s As Single[] = [0.1, 0.1, 0.028, 0.04, 0.064, 0.106, 0.182, 0.32, 0.56, 1.05, 1.9, 3.4, 6.3, 11.6, 21.6, 40.5, 76, 144]
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| − |
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| − | mx = (x - Mouse.X)
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| − | my = (y - Mouse.Y)
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| − |
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| − | mappa.Center.Lat -= ((my ^ 0) * my) / (98 * mappa.Zoom * s[mappa.Zoom - 1])
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| − | mappa.Center.Lon += ((mx ^ 0) * mx) / (72 * mappa.Zoom * s[mappa.Zoom - 1])
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| − |
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| − | x = Mouse.X
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| − | y = Mouse.Y
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| − |
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| − | End
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| − |
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| − | Public Sub ImageView1_MouseDown()
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| − |
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| − | pt = Point(Mouse.X, Mouse.Y)
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| − |
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| − | Me.Text = "Lat. " & Format(mappa.PixelToMapPointRel(pt).Lat, "0.000000") &
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| − | " Lon. " & Format(mappa.PixelToMapPointRel(pt).Lon, "0.000000") &
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| − | " - Zoom: " & CStr(mappa.Zoom)
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| − |
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| − | x = pt.X
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| − | y = pt.Y
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| − |
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| − | <FONT Color=gray>' ''Se si clicca sulla mappa con il tasto centrale, viene creato un file immagine della mappa corrente mostrata:''</font>
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| − | If Mouse.Middle Then
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| − | Dim im As New Image(mappa.Width, mappa.Height, Color.Transparent, Image.Standard)
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| − | With Paint
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| − | .Begin(im)
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| − | mappa.Draw()
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| − | .End
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| − | End With
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| − | im.Save("/tmp/immagine.png", 100)
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| − | Endif
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| − |
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| − | End
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| − | | |
| − | [2] Qualora la mappa non appaia, verificare la versione GoogleMap, ed eventualmente modificarla in questo punto: ["version": "900"]
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| − | <BR>Al riguardo vedere: [[Conoscere_la_versione_più_recente_di_Google_Maps_satellite|Conoscere la versione più recente di Google Maps satellite]]
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| − | [3] Vedere anche: [[Ottenere_un%27Image_dalla_mappa_mostrata_da_una_MapView|Ottenere un'Image dalla mappa mostrata da una MapView]]
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