Mouse cursor does not rotate in selection margin

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Hi everyone, I've tried really everything, searched everywhere, but my class derived from Richtextbox (WinForm) in Net 4.0 absolutely refuses to show the mouse cursor (right-sloping arrow) in the text selection area ( entire line) so to speak "SelectionMargin". To be precise, it appears and disappears a moment later. The classroom is empty, there are no events that could disturb it. Furthermore, there is little or nothing on this topic online, as if it were a secret to be kept. Thanks everyone and sorry for the bad translation.

What I have tried:

This is the code that gave me the best result, but it's a stretch and it still flashes from time to time.

.NET

Protected Overrides Sub OnMouseMove(e As System.Windows.Forms.MouseEventArgs)

        With Me

            If Not .ClientRectangle.Contains(e.Location) Then
                .Capture = False
            ElseIf Not .Capture Then
                .Capture = True
            End If

            Cursor = Cursors.IBeam

            Dim X = PointToClient(Control.MousePosition).X

            If X <= Me.SelectionIndent Then
                Cursor = Cursors.Arrow
            Else
                Cursor = Cursors.IBeam
            End If

        End With

        MyBase.OnMouseMove(e)

    End Sub

Posted 8-Nov-23 5:29am

10071962

Updated 8-Nov-23 6:28am

Andre Oosthuizen

v2

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[no name] 8-Nov-23 13:22pm

You set the cursor "once"; you don't keep hitting it with every "increment" in a mouse move. Figure out a "mode" that toggles the cursor; not hammers it.

1 solution

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10071962 · Answer 1 · 2023-11-08T18:29:00

I hadn't thought of that, it seems to work. Thank you

VB

Dim X = PointToClient(Control.MousePosition).X

            If X <= Me.SelectionIndent Then
                If Cursor = Cursors.Arrow Then
                    Exit Sub
                End If
                Cursor = Cursors.Arrow
            Else
                If Cursor = Cursors.IBeam Then
                    Exit Sub
                End If
                Cursor = Cursors.IBeam
            End If