0

前書き:

ここで@Hans Passantによって最初に書かれたカスタムメッセージボックスクラスを使用しています:Winforms -MainFormの中心にMessageBoxを表示するにはどうすればよいですか?

(私が使用している修正版はこの質問の一番下にあります)

カスタム メッセージ ボックスは、カスタム テキスト フォントを受け取って表示できます。

これは使用例です:

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

問題:

ウィンドウのすべてのコンテンツは、手動でサイズ変更/配置する必要があります。そうでない場合、テキストは次のようにトリミングされて表示されます。

ここに画像の説明を入力

そして、これは大きなフォントを使用した場合の結果です (テキスト コントロールのサイズを変更しました):

ここに画像の説明を入力

したがって、ウィンドウのサイズを変更し、ボタンを配置するために、どの位置とサイズが実際にフォントサイズに要素を持つかを計算する必要があります。それが私が求めていることです。どうすればそれができますか?私は数学があまり得意ではないので、単なる公式以上のものを必要とします.

要素:

私はこれらの要素を念頭に置いています:

  • メッセージ ボックスのテキスト フォント サイズ。
  • テキストを格納して表示する Messagebox 静的コントロール。
  • メッセージボックス ボタン (1 つ、2 つ、または 3 つのボタンの組み合わせで、既定の位置が異なります)
  • これらすべての要素を含むメッセージボックス ウィンドウ フォーム。

ボタン変数:

  • メッセージ ボックス ウィンドウにボタンが 1 つしかない場合 (例: 「OK」)、中央に配置されますが、ボタンが 3 つある場合 (例: 「AbortRetryIgnore」)、最初のボタンは左下隅に配置され、2 番目のボタンは左下隅に配置されます。中央に、最後のボタンが右隅に、これについて説明する必要はないと思います。

私は算術の第一人者ではないので、必要な値がいくつか欠けていたら許してください。

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

これは私が自分でできることです。私はこの方法でメッセージボックスボタン要素を保存することをテストしています:

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.

(メッセージボックスボタンの組み合わせに関係なく、常に同じアイテムインデックスを持っています)

メッセージ ボックス ウィンドウのサイズを変更するには、MoveWindow API を次のように使用します。

     ' 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)

残りの要素 (テキスト コンテナー、ボタン) のサイズを変更するには、メッセージ ボックス フォームのサイズを変更した後、次のように SetWindowPos API を使用できます。

  ' 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)

メッセージボックスクラス

ここに、私が以前に言及したすべてのことを台無しにします:

' [ 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

アップデート

これは、@Grahamvs ソリューションを使用しようとしているものです。

ここに画像の説明を入力

   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
4

1 に答える 1

3

これは私のために働いた:

私が変更され:

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

 Declare Auto Function SendMessage Lib "user32.dll" (ByVal hWnd As IntPtr, ByVal msg As Integer, ByVal wParam As IntPtr, ByVal lParam As IntPtr) As IntPtr

および追加 (の後にSendMessage(hText, WM_SETFONT, mFont.ToHfont(), New IntPtr(1)))

        ' Get text
        Dim WM_GETTEXT As Integer = &HD

        ' Alloc memory for the buffer that recieves the text
        Dim Hndl As IntPtr = Marshal.AllocHGlobal(200)

        ' Send The WM_GETTEXT Message
        Dim NumText As Integer = SendMessage(hText, WM_GETTEXT, 200, Hndl)

        ' Copy the characters from the unmanaged memory to a managed string
        Dim MSGText As String = Marshal.PtrToStringUni(Hndl)


        ' Measure the text
        Dim TextSize As SizeF
        Using G As Graphics = mOwner.CreateGraphics
            TextSize = G.MeasureString(MSGText & "MMM", mFont)
        End Using

そして次のように変更されMoveWindowました:

MoveWindow(hWnd, frmRect.Left + (frmRect.Width - dlgRect.Right + dlgRect.Left) \ 2, frmRect.Top + (frmRect.Height - dlgRect.Bottom + dlgRect.Top) \ 2, CInt(TextSize.Width) + Messagebox_window_extra_width, (dlgRect.Bottom - dlgRect.Top) + Messagebox_window_extra_height, True)

お役に立てれば

編集:ここに完全なコードがあります

' [ Centered MessageBox ]

'

' The author of the original code is Hans Passant: http://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(ByVal hWnd As IntPtr, ByVal lp As IntPtr) As Boolean



    <DllImport("user32.dll")> _

    Private Shared Function EnumThreadWindows(ByVal tid As Integer, ByVal callback As EnumThreadWndProc, ByVal 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(ByVal hWnd As IntPtr, ByVal buffer As StringBuilder, ByVal buflen As Integer) As Integer

    End Function



    <DllImport("user32.dll")> _

    Private Shared Function GetDlgItem(ByVal hWnd As IntPtr, ByVal item As Integer) As IntPtr

    End Function



    '<DllImport("user32.dll")> _

    'Private Shared Function SendMessage(ByVal hWnd As IntPtr, ByVal msg As Integer, ByVal wp As IntPtr, ByVal lp As IntPtr) As IntPtr

    'End Function



    <DllImport("user32.dll")> _

    Shared Function GetWindowRect(ByVal hWnd As IntPtr, ByRef rc As RECT) As Boolean

    End Function



    <DllImport("user32.dll")> _

    Shared Function MoveWindow(ByVal hWnd As IntPtr, ByVal x As Integer, ByVal y As Integer, ByVal w As Integer, ByVal h As Integer, ByVal repaint As Boolean) As Boolean

    End Function



    Declare Auto Function SendMessage Lib "user32.dll" (ByVal hWnd As IntPtr, ByVal msg As Integer, ByVal wParam As IntPtr, ByVal lParam As IntPtr) As IntPtr



    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(ByVal owner As Form, Optional ByVal 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(ByVal hWnd As IntPtr, ByVal 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))



            ' Get text

            Dim WM_GETTEXT As Integer = &HD



            ' Alloc memory for the buffer that recieves the text

            Dim Hndl As IntPtr = Marshal.AllocHGlobal(200)



            ' Send The WM_GETTEXT Message

            Dim NumText As Integer = SendMessage(hText, WM_GETTEXT, 200, Hndl)



            ' Copy the characters from the unmanaged memory to a managed string

            Dim MSGText As String = Marshal.PtrToStringUni(Hndl)





            ' Measure the text

            Dim TextSize As SizeF

            Using G As Graphics = mOwner.CreateGraphics

                TextSize = G.MeasureString(MSGText & "MMM", mFont)

            End Using



            ' 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)

            MoveWindow(hWnd, frmRect.Left + (frmRect.Width - dlgRect.Right + dlgRect.Left) \ 2, frmRect.Top + (frmRect.Height - dlgRect.Bottom + dlgRect.Top) \ 2, Math.Max(CInt(TextSize.Width), 200) + 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
于 2013-10-24T11:45:36.003 に答える