Sub Class_Globals
    Private pnlClock As Panel      ' Pannello in cui disegnare l'orologio
    Private cvsClock As Canvas     ' Canvas per disegnare l'orologio
    Private clockDiameter As Float ' Diametro dell'orologio (in pixel)
    Private centerX As Float       ' Coordinata X del centro dell'orologio
    Private centerY As Float       ' Coordinata Y del centro dell'orologio
    Private intervals As List      ' Lista degli intervalli da disegnare
End Sub

' Inizializza l'orologio
Public Sub Initialize(ParentPanel As Panel, PercentageOfWidth As Float)
    pnlClock = ParentPanel
    cvsClock.Initialize(pnlClock)
    intervals.Initialize
    SetClockSize(PercentageOfWidth)
End Sub

' Imposta la dimensione dell'orologio come percentuale della larghezza del pannello
Public Sub SetClockSize(PercentageOfWidth As Float)
    clockDiameter = pnlClock.Width * PercentageOfWidth / 100
    centerX = pnlClock.Width / 2
    centerY = pnlClock.Height / 2
    DrawClock
End Sub

' Disegna l'orologio
Public Sub DrawClock
    cvsClock.Initialize(pnlClock)
    
    ' Cancella il canvas
    cvsClock.DrawColor(Colors.White)
    
    ' Disegna il cerchio esterno
    cvsClock.DrawCircle(centerX, centerY, clockDiameter / 2, Colors.Black, False, 5)
    
    ' Disegna le tacche delle ore e dei minuti
    DrawTicks
    
    ' Disegna gli intervalli
    For Each interval As Map In intervals
        DrawInterval(interval.Get("startHour"), interval.Get("startMinute"), interval.Get("endHour"), interval.Get("endMinute"), interval.Get("color"), interval.Get("radius"))
    Next
    
    ' Disegna le lancette
    Dim now As Long = DateTime.Now
    Dim Hours As Int = DateTime.GetHour(now) Mod 12
    Dim Minutes As Int = DateTime.GetMinute(now)
    Dim Seconds As Int = DateTime.GetSecond(now)
    
    ' Lancetta ore
    Dim HourAngle As Float = -90 + Hours * 30 + Minutes / 2
    DrawHand(centerX, centerY, clockDiameter * 0.25, HourAngle, 8, Colors.Black)
    
    ' Lancetta minuti
    Dim MinuteAngle As Float = -90 + Minutes * 6
    DrawHand(centerX, centerY, clockDiameter * 0.4, MinuteAngle, 5, Colors.Blue)
    
    ' Lancetta secondi
    Dim SecondAngle As Float = -90 + Seconds * 6
    DrawHand(centerX, centerY, clockDiameter * 0.45, SecondAngle, 2, Colors.Red)
    
    ' Aggiorna il pannello
    pnlClock.Invalidate
End Sub

' Disegna una singola lancetta
Private Sub DrawHand(x As Float, y As Float, length As Float, angle As Float, width As Int, color As Int)
    Dim endX As Float = x + length * CosD(angle)
    Dim endY As Float = y + length * SinD(angle)
    cvsClock.DrawLine(x, y, endX, endY, color, width)
End Sub

' Disegna le tacche delle ore e dei minuti
Private Sub DrawTicks
    For i = 0 To 59
        Dim angle As Float = -90 + i * 6
        Dim startX As Float
        Dim startY As Float
        Dim endX As Float
        Dim endY As Float
        If i Mod 5 = 0 Then
            ' Tacca delle ore
            startX = centerX + (clockDiameter / 2 - 20dip) * CosD(angle)
            startY = centerY + (clockDiameter / 2 - 20dip) * SinD(angle)
            endX = centerX + (clockDiameter / 2 - 5dip) * CosD(angle)
            endY = centerY + (clockDiameter / 2 - 5dip) * SinD(angle)
            cvsClock.DrawLine(startX, startY, endX, endY, Colors.Black, 5)
        Else
            ' Tacca dei minuti
            startX = centerX + (clockDiameter / 2 - 10dip) * CosD(angle)
            startY = centerY + (clockDiameter / 2 - 10dip) * SinD(angle)
            endX = centerX + (clockDiameter / 2 - 5dip) * CosD(angle)
            endY = centerY + (clockDiameter / 2 - 5dip) * SinD(angle)
            cvsClock.DrawLine(startX, startY, endX, endY, Colors.Black, 2)
        End If
    Next
End Sub

' Aggiunge un intervallo da disegnare
Public Sub AddInterval(startHour As Int, startMinute As Int, endHour As Int, endMinute As Int, tipo As String)
    Dim interval As Map
    interval.Initialize
    interval.Put("startHour", startHour)
    interval.Put("startMinute", startMinute)
    interval.Put("endHour", endHour)
    interval.Put("endMinute", endMinute)
    Select tipo.ToLowerCase
        Case "mattino"
            interval.Put("color", Colors.Blue)
            interval.Put("radius", clockDiameter / 2 - 15dip)
        Case "pomeriggio"
            interval.Put("color", Colors.Green)
            interval.Put("radius", clockDiameter / 2 - 25dip)
        Case Else
            Log("Tipo di intervallo non riconosciuto: " & tipo)
            Return
    End Select
    intervals.Add(interval)
    DrawClock
End Sub

' Disegna un intervallo sul quadrante

Private Sub DrawInterval(startHour As Int, startMinute As Int, endHour As Int, endMinute As Int, color As Int, radius As Float)
    Dim startAngle As Float = (startHour Mod 12 + startMinute / 60) * 30 - 90
    Dim endAngle As Float = (endHour Mod 12 + endMinute / 60) * 30 - 90
    Dim sweepAngle As Float = endAngle - startAngle
    If sweepAngle < 0 Then sweepAngle = sweepAngle + 360

    Dim path As Path
    path.Initialize(centerX, centerY)
    path.LineTo(centerX + radius * CosD(startAngle), centerY + radius * SinD(startAngle))
    path.AddArc2(centerX - radius, centerY - radius, centerX + radius, centerY + radius, startAngle, sweepAngle)
    path.LineTo(centerX, centerY)
    path.Close

    cvsClock.ClipPath(path)
    cvsClock.DrawCircle(centerX, centerY, radius, color, True, 0)
    cvsClock.RemoveClip
End Sub