もちろん、Graphics.MeasureStringメソッドにはパディングの問題があることがよく知られているため、代わりにGraphics.MeasureCharacterRangesを使用しますが、次のようになります。
正確に測定されていません。これはMeasureCharacterRangesの問題ですか、それとも私のコードですか?どうすれば修正できますか?
これが私のコードです:
'Draw the selection cursor
If Me.Focused Then
Dim cX As Integer = 1, cY As Integer = 5, c As Char
For i As Integer = 0 To Me.SelectionStart - 1
c = Me.Text(i)
If c = ControlChars.CrLf Then
cY += Me.Font.Height
Else
Dim w As Integer = MeasureCharacter(g, c, Me.Font).Width
g.DrawRectangle(Pens.Black, cX, cY, w, Me.Font.Height) 'Draw a rectangle for debugging
cX += w
End If
Next
g.DrawLine(Pens.Black, cX, cY, cX, cY + Me.Font.Height)
End If
End Sub
Protected Function MeasureCharacter(ByVal g As Graphics, ByVal c As Char, ByVal f As Font) As Size
Dim cr() As CharacterRange = {New CharacterRange(0, 1)}
Dim sfmt As New StringFormat()
sfmt.FormatFlags = StringFormatFlags.MeasureTrailingSpaces
sfmt.SetMeasurableCharacterRanges(cr)
Return g.MeasureCharacterRanges(c.ToString(), f, Me.ClientRectangle, sfmt)(0).GetBounds(g).Size.ToSize()
End Function