哪个数学公式可以计算此窗口的大小和位置？

介绍：

我正在使用最初由@Hans Passant在此处编写的自定义消息框类：Winforms-如何使MessageBox出现在MainForm的中心？

（我使用的修改后的版本位于该问题的底部）

自定义消息框可以接收自定义文本字体以显示它。

这是一个用法示例：

Using New CenteredMessageBox(Me, _
      New Font(New FontFamily("Lucida Console"), 16, FontStyle.Bold))

 MessageBox.Show("Test Text", "Test Title", MessageBoxButtons.YesNo, MessageBoxIcon.Question)

End Using

问题：

窗口的所有内容都需要手动调整大小/位置，否则，文本将被裁剪，如下所示：

如果我使用更大的字体，这就是结果（我调整了文本控件的大小）：

因此，我需要计算哪些位置和大小将实际具有与字体大小相对应的元素，以调整窗口的大小并放置按钮的位置，这就是我要的。我该怎么办？我不仅仅需要一个简单的公式，因为数学我做得不好。

要素：

我牢记以下要素：

• 消息框的文本字体大小。
• 包含并显示文本的Messagebox静态控件。
• 消息框按钮（可以是1个按钮，2个按钮或3个按钮的组合，具有不同的默认位置）
• 包含所有这些元素的消息框窗口表单。

按钮变量：

• 如果在消息框窗口中只有1个按钮（例如：“确定”）将被分配到中间，但是如果它们是3个按钮（例如：“ AbortRetryIgnore”），则第一个按钮将被分配到左下角，第二个按钮将被分配到左下角到中间的位置，最后一个按钮位于右上角，我认为没有必要对此进行解释，因为所有人都知道msgbox如何显示其按钮。

我不是算术大师，所以如果我错过了一些必要的值，请原谅我，但是我认为这些将是代码中要使用的必要值/变量：

Dim Text_width As Integer = 0
Dim Text_height As Integer = 0

Dim Text_Container_width As Integer = 0
Dim Text_Container_height As Integer = 0

' Don't calculate the exact size of messagebox window,
' just I think only needs to sum an extra size to a default messagebox rectangle 
Dim Messagebox_window_extra_width As Integer = 0
Dim Messageboxwindow_extra_height As Integer = 0

' This represents the first button,
' in a messagebox button combination of 1, 2, or 3 buttons,
' this button could be displayed alligned at bottom-middle (as unique button), 
' or could be alligned at bottom-left (as the first of 2 of 3 button combination).
Dim Button_1_Pos_X As Integer = 0
Dim Button_1_Pos_Y As Integer = 0

' This button represents the second button
' in a messagebox button combination of 2 or 3 buttons,
' the buton could exist or could not
' and could be displayed alligned at bottom-middle (in the middle of 3 buttons),
' this button could be displayed alligned at bottom-right (as second and last button). 
Dim Button_2_Pos_X As Integer = 0 
Dim Button_2_Pos_Y As Integer = 0

' This button represents the third button 
' a messagebox button combination of 2 or 3 buttons,
' the buton could exist or could not
' and could be displayed alligned at bottom-right (as third and last button).
Dim Button_3_Pos_X As Integer = 0
Dim Button_3_Pos_Y As Integer = 0

这是我自己可以做的，我一直在测试以这种方式存储消息框按钮元素：

Dim button_Ok As IntPtr = GetDlgItem(hWnd, 1)     ' The 'Ok'     button.
Dim button_Cancel As IntPtr = GetDlgItem(hWnd, 2) ' the 'Cancel' button.
Dim button_Abort As IntPtr = GetDlgItem(hWnd, 3)  ' the 'Abort'  button.
Dim button_Retry As IntPtr = GetDlgItem(hWnd, 4)  ' the 'Retry'  button.
Dim button_Ignore As IntPtr = GetDlgItem(hWnd, 5) ' the 'Ignore' button.
Dim button_Yes As IntPtr = GetDlgItem(hWnd, 6)    ' the 'Yes'    button.
Dim button_No As IntPtr = GetDlgItem(hWnd, 7)     ' the 'NO'     button.

（无论消息框是否组合，它们始终具有相同的Item索引）

要调整消息框窗口的大小，我可以使用MoveWindow API，如下所示：

     ' This is to resize and positionate the messagebox window
    MoveWindow(hWnd, _
               frmRect.Left + (frmRect.Width - dlgRect.Right + dlgRect.Left) \ 2, _
               frmRect.Top + (frmRect.Height - dlgRect.Bottom + dlgRect.Top) \ 2, _
               (dlgRect.Right - dlgRect.Left) + Messagebox_window_extra_width, _
               (dlgRect.Bottom - dlgRect.Top) + Messagebox_window_extra_height, True)

在调整消息框的大小之后，要调整其余元素（文本容器，按钮）的大小，则可以使用SetWindowPos API，如下所示：

  ' Text container:
   SetWindowPos(hText, 0, 70, 30, 1920, 1080, 0) ' Values are not perfect calculated but works fine 

  ' Messagebox buttons:
  ' SetWindowPos(button_Ok, 0, 0, 0, 0, 0, 0) 
  ' SetWindowPos(button_Cancel, 0, 0, 0, 0, 0, 0)
  ' SetWindowPos(button_Abort, 0, 0, 0, 0, 0, 0)
  ' SetWindowPos(button_Retry, 0, 0, 0, 0, 0, 0) 
  ' SetWindowPos(button_Ignore, 0, 0, 0, 0, 0, 0) 
  ' SetWindowPos(button_Yes, 0, 0, 0, 0, 0, 0) 
  ' SetWindowPos(button_No, 0, 0, 0, 0, 0, 0)

信息框类

这里弄乱了我之前提到的所有内容：

' [ Centered MessageBox ]
'
' The author of the original code is Hans Passant: https://stackoverflow.com/questions/2576156/winforms-how-can-i-make-messagebox-appear-centered-on-mainform
'
' Examples :
'
' Using New CenteredMessageBox(Me, New Font(New FontFamily("Lucida Console"), Font.SizeInPoints, FontStyle.Bold))
'     MessageBox.Show("Test Text", "Test Title", MessageBoxButtons.OK, MessageBoxIcon.Information)
' End Using

#Region " Centered MessageBox Class"

Imports System.Drawing
Imports System.Runtime.InteropServices
Imports System.Text
Imports System.Windows.Forms

Class CenteredMessageBox : Implements IDisposable

    Private mTries As Integer = 0
    Private mOwner As Form
    Private mFont As Font

    Dim Text_width As Integer = 0
    Dim Text_height As Integer = 0

    Dim Text_Container_width As Integer = 0
    Dim Text_Container_height As Integer = 0

    Dim Messagebox_window_extra_width As Integer = 0
    Dim Messagebox_window_extra_height As Integer = 0

    Dim Button_1_Pos_X As Integer = 0 ' "OK" Button
    Dim Button_1_Pos_Y As Integer = 0 ' "OK" Button

    Dim Button_2_Pos_X As Integer = 0 ' This button could not exist
    Dim Button_2_Pos_Y As Integer = 0 ' This button could not exist

    Dim Button_3_Pos_X As Integer = 0 ' This button could not exist
    Dim Button_3_Pos_Y As Integer = 0 ' This button could not exist

    ' P/Invoke declarations
    Private Const WM_SETFONT As Integer = &H30
    Private Const WM_GETFONT As Integer = &H31

    Private Delegate Function EnumThreadWndProc(hWnd As IntPtr, lp As IntPtr) As Boolean

    <DllImport("user32.dll")> _
    Private Shared Function EnumThreadWindows(tid As Integer, callback As EnumThreadWndProc, lp As IntPtr) As Boolean
    End Function

    <DllImport("kernel32.dll")> _
    Private Shared Function GetCurrentThreadId() As Integer
    End Function

    <DllImport("user32.dll")> _
    Private Shared Function GetClassName(hWnd As IntPtr, buffer As StringBuilder, buflen As Integer) As Integer
    End Function

    <DllImport("user32.dll")> _
    Private Shared Function GetDlgItem(hWnd As IntPtr, item As Integer) As IntPtr
    End Function

    <DllImport("user32.dll")> _
    Private Shared Function SendMessage(hWnd As IntPtr, msg As Integer, wp As IntPtr, lp As IntPtr) As IntPtr
    End Function

    <DllImport("user32.dll")> _
    Shared Function GetWindowRect(hWnd As IntPtr, ByRef rc As RECT) As Boolean
    End Function

    <DllImport("user32.dll")> _
    Shared Function MoveWindow(hWnd As IntPtr, x As Integer, y As Integer, w As Integer, h As Integer, repaint As Boolean) As Boolean
    End Function

    Structure RECT
        Public Left As Integer
        Public Top As Integer
        Public Right As Integer
        Public Bottom As Integer
    End Structure

    Friend Declare Function SetWindowPos Lib "user32" (ByVal hwnd As IntPtr, ByVal hWndInsertAfter As IntPtr, ByVal x As Integer, ByVal y As Integer, ByVal cx As Integer, ByVal cy As Integer, ByVal wFlags As UInt32) As Boolean

    Public Sub New(owner As Form, Optional Custom_Font As Font = Nothing)
        mOwner = owner
        mFont = Custom_Font
        owner.BeginInvoke(New MethodInvoker(AddressOf findDialog))
    End Sub

    Private Sub findDialog()

        ' Enumerate windows to find the message box
        If mTries < 0 Then
            Return
        End If

        Dim callback As New EnumThreadWndProc(AddressOf checkWindow)

        If EnumThreadWindows(GetCurrentThreadId(), callback, IntPtr.Zero) Then
            If System.Threading.Interlocked.Increment(mTries) < 10 Then
                mOwner.BeginInvoke(New MethodInvoker(AddressOf findDialog))
            End If
        End If

    End Sub

    Private Function checkWindow(hWnd As IntPtr, lp As IntPtr) As Boolean

        ' Checks if <hWnd> is a dialog
        Dim sb As New StringBuilder(260)
        GetClassName(hWnd, sb, sb.Capacity)
        If sb.ToString() <> "#32770" Then Return True

        ' Got it, get the STATIC control that displays the text
        Dim hText As IntPtr = GetDlgItem(hWnd, &HFFFF)
        ' Get the messagebox button elements
        Dim button_Ok As IntPtr = GetDlgItem(hWnd, 1)     ' The 'Ok'     button.
        Dim button_Cancel As IntPtr = GetDlgItem(hWnd, 2) ' the 'Cancel' button.
        Dim button_Abort As IntPtr = GetDlgItem(hWnd, 3)  ' the 'Abort'  button.
        Dim button_Retry As IntPtr = GetDlgItem(hWnd, 4)  ' the 'Retry'  button.
        Dim button_Ignore As IntPtr = GetDlgItem(hWnd, 5) ' the 'Ignore' button.
        Dim button_Yes As IntPtr = GetDlgItem(hWnd, 6)    ' the 'Yes'    button.
        Dim button_No As IntPtr = GetDlgItem(hWnd, 7)     ' the 'NO'     button.

        Dim frmRect As New Rectangle(mOwner.Location, mOwner.Size)
        Dim dlgRect As RECT
        GetWindowRect(hWnd, dlgRect)

        If hText <> IntPtr.Zero Then

            If mFont Is Nothing Then
                ' Get the current font
                mFont = Font.FromHfont(SendMessage(hText, WM_GETFONT, IntPtr.Zero, IntPtr.Zero))

            End If

            SendMessage(hText, WM_SETFONT, mFont.ToHfont(), New IntPtr(1))

            ' Just here is an empty space where I can test some operations:
            '
            ' Messagebox_window_extra_width = (mFont.Height \ mFont.Size) + (dlgRect.Right)
            ' Messagebox_window_extra_height = mFont.Height +

            ' This is to resize and positionate the messagebox window:
            MoveWindow(hWnd, _
                       frmRect.Left + (frmRect.Width - dlgRect.Right + dlgRect.Left) \ 2, _
                       frmRect.Top + (frmRect.Height - dlgRect.Bottom + dlgRect.Top) \ 2, _
                       (dlgRect.Right - dlgRect.Left) + Messagebox_window_extra_width, _
                       (dlgRect.Bottom - dlgRect.Top) + Messagebox_window_extra_height, True)

            ' And this is to resize and positionate the rest elements:
            '
            ' Text container:
            SetWindowPos(hText, 0, 70, 30, 1920, 1080, 0)
            '
            ' Messagebox buttons:
            ' SetWindowPos(button_Ok, 0, 0, 0, 0, 0, 0) 
            ' SetWindowPos(button_Cancel, 0, 0, 0, 0, 0, 0)
            ' SetWindowPos(button_Abort, 0, 0, 0, 0, 0, 0)
            ' SetWindowPos(button_Retry, 0, 0, 0, 0, 0, 0) 
            ' SetWindowPos(button_Ignore, 0, 0, 0, 0, 0, 0) 
            ' SetWindowPos(button_Yes, 0, 0, 0, 0, 0, 0) 
            ' SetWindowPos(button_No, 0, 0, 0, 0, 0, 0)

        End If

        ' Done
        Return False

    End Function

    Public Sub Dispose() Implements IDisposable.Dispose
        mTries = -1
        mOwner = Nothing
        If mFont IsNot Nothing Then mFont.Dispose()
    End Sub

End Class

#End Region

更新

这就是我尝试使用@Grahamvs解决方案的方法：

   Using New CenteredMessageBox(Me, New Font(New FontFamily("Lucida Console"), Font.SizeInPoints, FontStyle.Bold))
        MessageBox.Show("Test Text", "Test Title", MessageBoxButtons.OK, MessageBoxIcon.Information)
    End Using