클래스 인스턴스에서 Graphics로 제어 개체 가져 오기

나는 winforms의 Graphics 클래스에 대한 경험이 많지 않습니다. 나는 그것의 스케치 단계 (또한 내가 추가 한 코드)에 있습니다. 내 문제는 내가 패널을 만들려고한다는 것 clockPanel입니다. 일부 그래픽을 사용하면 예외가 발생하지 않지만 패널 (UI에서 볼 수 있듯이)에는 그래픽이 없습니다. 예제를 찾으려고 노력했지만 실수 나 코드에서 놓친 것을 찾을 수 없습니다. 그래픽 경험이있는 분들에게는 쉬운 방법 일 것입니다. 시간 내 주셔서 감사합니다.

VB CODE : 인스턴스를 통해 GoalsClock 클래스의 다른 패널 ( 'secondaryPannel')에 'clockpanel'패널 추가

Public Class ManagersTab
...
  Public Sub BuiledDashBoard()
...
  Dim p As GoalsClock = New GoalsClock(100, 100, 0.8)
        p.Create()
        p.clockPanel.Location = New Point(200, 100)
        secondaryPannel.Controls.Add(p.clockPanel)
...
  End Sub
...
End Class

Create () 메서드는 가장 관련성이 높은 부분입니다.

Class GoalsClock

    Private Gclock As Graphics
    Private clockWidth As Int16
    Private clockHeight As Int16
    Private xPos As Int16
    Private yPos As Int16

    Public clockPanel As Panel
    Private panelColor As Color

    Private PercentTextColor As Color
    ' rectangles to store squares
    Protected OuterRect As Rectangle
    Protected InnerRect As Rectangle
    Protected InnerStringBrush As Brush
    Protected InnerStringColor As Color
    Protected InnerStringFontSize As Byte

    ' inner square
    Private InnerSquarePen As Pen
    Private InnerSquarePen_Color As Color
    Private InnerSquarePen_Width As Byte
    ' outer square
    Private OuterSquarePen As Pen
    Private OuterSquarePen_Color As Color
    Private OuterSquarePen_Width As Byte

    Private _PercentOfGoals As Single ' to calculate the goals deg arc
    Public Property PercentOfGoals() As Single
        Get
            Return _PercentOfGoals * 100
        End Get
        Private Set(ByVal value As Single)
            If value <= 1.0F Then
                _PercentOfGoals = value
            Else
                value = 0
            End If
        End Set
    End Property

    Sub New(ByVal clockWidth As Int16, ByVal clockHeight As Int16, ByVal GoalsPercent As Single)
        Me.clockWidth = clockWidth
        Me.clockHeight = clockHeight
        PercentOfGoals = GoalsPercent


        ' values for test
        xPos = 0
        yPos = 0
        InnerStringFontSize = 12
        OuterSquarePen = New Pen(Color.Gray)
        InnerSquarePen = New Pen(Color.Cyan)
        OuterSquarePen_Width = 23
        InnerSquarePen_Width = 15
    End Sub

    ''' <summary>
    ''' 
    '''  create graphics of the goals clock on clockPanel
    ''' </summary>
    ''' <remarks></remarks>
    Public Sub Create()
        ' panel
        clockPanel = New Panel()
        clockPanel.Size = New Size(clockWidth, clockHeight)
        clockPanel.BackColor = Color.Beige
        Gclock = clockPanel.CreateGraphics()
        ' create outer rectangle
        OuterRect = New Rectangle(xPos, yPos, clockWidth, clockHeight)
        ' create inner rectangle
        Dim w, h, x, y As Integer
        getInnerRectSizeAndLocation(w, h, x, y)
        InnerRect = New Rectangle(x, y, w, h)
        ' draw goals string inside inner rect
        InnerStringBrush = Brushes.Cyan
        Gclock.DrawString(getPercentString(), New Font("ARIAL", InnerStringFontSize, FontStyle.Bold), InnerStringBrush, InnerRect)

        ' create outer square
        OuterSquarePen = New Pen(OuterSquarePen_Color, OuterSquarePen_Width)
        Gclock.DrawArc(OuterSquarePen, OuterRect, 1.0F, 360.0F)

        ' create inner square
        InnerSquarePen = New Pen(InnerSquarePen_Color, InnerSquarePen_Width)
        Dim sweepAngle As Short = getSweepAngleFromGoalsPercent()
        Gclock.DrawArc(InnerSquarePen, OuterRect, -90.0F, sweepAngle)

    End Sub

    Private Sub getInnerRectSizeAndLocation(ByRef w As Integer, ByRef h As Integer, ByRef x As Integer, ByRef y As Integer)
        ' values for test
        w = 40
        h = 40
        x = 64
        y = 65
    End Sub

    Private Function getPercentString() As String
        Return PercentOfGoals.ToString() & "%"
    End Function

    Private Function getSweepAngleFromGoalsPercent() As Single
        ' value for test
        Return 0.0F
    End Function


End Class