私は現在このコードを使用しており、問題なく動作します
私の質問はを設定することで解決しましたが、フォームの縦横比が Windows デスクトップサイズWndProc
、幅と高さの好みの制限で停止するように変更する方法です。MinimumSize
の制限に達すると、新しい問題が発生します。maximum right
制限幅に達したときに両方のサイズの増加を停止するには、どういうわけかWndProc
withを修正する必要があります。SystemInformation.VirtualScreen.Width
これは機能しますが、すべての解像度をサポートするためにユニバーサルにする方法はまだ私の解像度のためだけです。
If r.right - r.left > SystemInformation.VirtualScreen.Width Then
r.bottom = 900 'quick fix (not good) how to calculate this value?
End If
コードのソース: http://www.vb-helper.com/howto_net_form_fixed_aspect.html
Imports System.Runtime.InteropServices
...
Public Structure Rect
Public left As Integer
Public top As Integer
Public right As Integer
Public bottom As Integer
End Structure
Protected Overrides Sub WndProc(ByRef m As _
System.Windows.Forms.Message)
Static first_time As Boolean = True
Static aspect_ratio As Double
Const WM_SIZING As Long = &H214
Const WMSZ_LEFT As Integer = 1
Const WMSZ_RIGHT As Integer = 2
Const WMSZ_TOP As Integer = 3
Const WMSZ_TOPLEFT As Integer = 4
Const WMSZ_TOPRIGHT As Integer = 5
Const WMSZ_BOTTOM As Integer = 6
Const WMSZ_BOTTOMLEFT As Integer = 7
Const WMSZ_BOTTOMRIGHT As Integer = 8
If m.Msg = WM_SIZING And m.HWnd.Equals(Me.Handle) Then
' Turn the message's lParam into a Rect.
Dim r As Rect
r = DirectCast( _
Marshal.PtrToStructure(m.LParam, _
GetType(Rect)), _
Rect)
' The first time, save the form's aspect ratio.
If first_time Then
first_time = False
aspect_ratio = (r.bottom - r.top) / (r.right - _
r.left)
End If
' Get the current dimensions.
Dim wid As Double = r.right - r.left
Dim hgt As Double = r.bottom - r.top
' Enlarge if necessary to preserve the aspect ratio.
If hgt / wid > aspect_ratio Then
' It's too tall and thin. Make it wider.
wid = hgt / aspect_ratio
Else
' It's too short and wide. Make it taller.
hgt = wid * aspect_ratio
End If
' See if the user is dragging the top edge.
If m.WParam.ToInt32 = WMSZ_TOP Or _
m.WParam.ToInt32 = WMSZ_TOPLEFT Or _
m.WParam.ToInt32 = WMSZ_TOPRIGHT _
Then
' Reset the top.
r.top = r.bottom - CInt(hgt)
Else
' Reset the height to the saved value.
r.bottom = r.top + CInt(hgt)
End If
' See if the user is dragging the left edge.
If m.WParam.ToInt32 = WMSZ_LEFT Or _
m.WParam.ToInt32 = WMSZ_TOPLEFT Or _
m.WParam.ToInt32 = WMSZ_BOTTOMLEFT _
Then
' Reset the left.
r.left = r.right - CInt(wid)
Else
' Reset the width to the saved value.
r.right = r.left + CInt(wid)
End If
' Update the Message object's LParam field.
Marshal.StructureToPtr(r, m.LParam, True)
End If
MyBase.WndProc(m)
End Sub