问如何在停靠模式下安排控件

EN

Me.FlowLayoutPanel1.FlowDirection = FlowDirection.RightToLeft 

Public Class MyFlowPanel
    Inherits Panel

    Protected Overrides Function CreateControlsInstance() As System.Windows.Forms.Control.ControlCollection
        Return New ControlCollection(Me)
    End Function

    Private Sub EnsureLayout(sender As Object, e As EventArgs)
        If (Not Me.isUpdatingLayout) Then
            Me.UpdateLayout()
        End If
    End Sub

    Private Sub NotifyControlIndexChanged(child As Control)
        'This will cause some selection issues in designer.
        'Implement a custom designer to fix this.
        Me.UpdateLayout()
    End Sub

    Protected Overrides Sub OnControlAdded(e As System.Windows.Forms.ControlEventArgs)
        AddHandler e.Control.SizeChanged, New EventHandler(AddressOf Me.EnsureLayout)
        AddHandler e.Control.LocationChanged, New EventHandler(AddressOf Me.EnsureLayout)
        AddHandler e.Control.Resize, New EventHandler(AddressOf Me.EnsureLayout)
        AddHandler e.Control.MarginChanged, New EventHandler(AddressOf Me.EnsureLayout)
        MyBase.OnControlAdded(e)
        Me.UpdateLayout()
    End Sub

    Protected Overrides Sub OnControlRemoved(e As System.Windows.Forms.ControlEventArgs)
        RemoveHandler e.Control.SizeChanged, New EventHandler(AddressOf Me.EnsureLayout)
        RemoveHandler e.Control.LocationChanged, New EventHandler(AddressOf Me.EnsureLayout)
        RemoveHandler e.Control.Resize, New EventHandler(AddressOf Me.EnsureLayout)
        RemoveHandler e.Control.MarginChanged, New EventHandler(AddressOf Me.EnsureLayout)
        MyBase.OnControlRemoved(e)
        Me.UpdateLayout()
    End Sub

    Protected Overrides Sub SetBoundsCore(x As Integer, y As Integer, width As Integer, height As Integer, specified As System.Windows.Forms.BoundsSpecified)
        MyBase.SetBoundsCore(x, y, width, height, specified)
        Me.UpdateLayout()
    End Sub

    Private Sub UpdateLayout()
        Me.isUpdatingLayout = True
        Dim top As Integer = Me.ClientRectangle.Top
        Dim right As Integer = Me.ClientRectangle.Right
        Dim c As Control
        For index = 0 To (Me.Controls.Count - 1)
            c = Me.Controls.Item(index)
            top += c.Margin.Top
            c.Location = New Point((right - (c.Width + c.Margin.Right)), top)
            top += (c.Height + c.Margin.Bottom)
        Next
        Me.isUpdatingLayout = False
    End Sub

    Private isUpdatingLayout As Boolean

    Public Shadows Class ControlCollection
        Inherits Panel.ControlCollection
        Public Sub New(owner As MyFlowPanel)
            MyBase.New(owner)
            Me.owner2 = owner
        End Sub
        Public Overrides Sub SetChildIndex(child As System.Windows.Forms.Control, newIndex As Integer)
            MyBase.SetChildIndex(child, newIndex)
            Me.owner2.NotifyControlIndexChanged(child)
        End Sub
        Private owner2 As MyFlowPanel
    End Class

End Class