How can I add a vertical scrollbar to my div automatically?

How can I add a vertical scrollbar to my div automatically?

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How can I add a vertical scrollbar to my div automatically?
Tag : css , By : Joshua Johnson
Date : November 25 2020, 07:22 PM

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Automatically display vertical scrollbar in multiline text edit control

Tag : cpp , By : Terrence Poon
Date : March 29 2020, 07:55 AM
should help you out On a windows mobile device I have a mutliline text edit control that is set to read-only and has some static text displayed during it's display lifetime. I would like to only display a vertical scrollbar when it's actually useful (i.e. the text is larger than the display). , This is how I solved this problem.
First off:
 void CMessageDlg::OnTimer( UINT_PTR nIDEvent )
        // deselect all text
        m_Message.SetSel(0, 0);
        SCROLLINFO info;
        m_Message.GetScrollInfo(SB_VERT, &info);

        if(info.nPage > (UINT)info.nMax)
            // need to re-display the non scroll bar version
            m_Message.ShowScrollBar(SB_VERT, FALSE);

            // I could not find any other way to force a redisplay 
            // correctly without display problems...

            // first move the window to a know invisible area
            // then wait (using a timer) for the window to move
            // then move the window back to it's original position     
            RECT rt;
            rt.left = 0;
            rt.right = 5;
            rt.top = 0;
            rt.bottom = 5;

            SetTimer(DO_REDISPLAY_MESSAGE, 50, 0);

        // m_MessagePosition holds the original position
        // worked out dynamically during the WM_SIZE
        // processing

Android: How to automatically display vertical scrollbar?

Tag : android , By : user183345
Date : March 29 2020, 07:55 AM
hop of those help? Remove the scrollbar attributes and wrap the whole thing in a ScrollView.

C#: will a vertical scrollbar appear on a listbox automatically?

Tag : development , By : Doc Immortal
Date : March 29 2020, 07:55 AM
To fix the issue you can do If I fill a ListBox with items, will a vertical scrollbar automatically appear when there are too many items to display, or is there something that needs to be set for this to occur? , YES, that it will.

how to automatically set the value of maximum property of vertical scrollbar depending on a panel's height

Tag : vb.net , By : user123585
Date : March 29 2020, 07:55 AM
I think the issue was by ths following , Handle the SizeChanged event of the Panel, get its Height property, process as required and assign the result to the Maximum of the VScrollBar. Similarly for the Width and Maximum of an HScrollBar.

Automatically fit Columns to Listview for Vertical Scrollbar

Tag : chash , By : user150744
Date : March 29 2020, 07:55 AM
it should still fix some issue when the (default) scrollbar appears inside the listview the size of the last column is not automatically fixed/decreased ... "default scrollbar" taken to mean the Veritical Scroll.
AutoResize is not AutoFit. It is for sizing columns based on the Header text extent or content length, not managing scrollbars and works very well. If it did automatically resize the last column, we would be angry when the last column is a small 'OK?' type column which was rendered unreadable when it was AutoFitted away.
Public Const WS_VSCROLL As Integer = &H200000
Public Const WS_HSCROLL As Integer = &H100000
Friend Enum SBOrientation As Integer
    SB_HORZ = &H0
    SB_VERT = &H1
    SB_CTL = &H2
    SB_BOTH = &H3
End Enum

<DllImport("user32.dll")> _
Private Shared Function ShowScrollBar(ByVal hWnd As IntPtr,
                     ByVal wBar As Integer,
                     <MarshalAs(UnmanagedType.Bool)> ByVal bShow As Boolean
                     ) As <MarshalAs(UnmanagedType.Bool)> Boolean
End Function

<DllImport("user32.dll", SetLastError:=True)> _
Private Shared Function GetWindowLong(ByVal hWnd As IntPtr, 
             ByVal nIndex As Integer) As Integer
End Function

Friend Shared Function IsHScrollVisible(ByVal ctl As Control) As Boolean
    Dim wndStyle As Integer = GetWindowLong(ctl.Handle, GWL_STYLE)
    Return ((wndStyle And WS_HSCROLL) <> 0)
End Function

Friend Shared Function IsVScrollVisible(ByVal ctl As Control) As Boolean
    Dim wndStyle As Integer = GetWindowLong(ctl.Handle, GWL_STYLE)
    Return ((wndStyle And WS_VSCROLL) <> 0)
End Function

Friend Shared Sub ShowHideScrollBar(ByVal ctl As Control, 
        ByVal sb As SBOrientation, ByVal bShow As Boolean)
     ShowScrollBar(ctl.Handle, sb, bShow)
End Sub
Private orgClient As Rectangle      ' original client size for comparing
Private _VScrollWidth As Integer 

Private _resizedCol As Integer = -1
Private _VScroll As Boolean = False    ' persistent Scroll flags 
Private _HScroll As Boolean = False

' 3rd party???
_VScrollWidth = System.Windows.Forms.SystemInformation.VerticalScrollBarWidth
orgClient = Me.ClientRectangle
' method on subclassed LV:   from form load: thisLV.ResetClientSize

Public Sub ResetClientSize          
   orgClient = Me.ClientRectangle   
End Sub
' a helper:
Private Function AllColumnsWidth() As Integer
    Dim w As Integer = 0
    For Each c As ColumnHeader In Columns
        w += c.Width
    Return w
End Function

' The Meat
Protected Overrides Sub OnClientSizeChanged(ByVal e As System.EventArgs)
    Dim VScrollVis As Boolean
    Dim HScrollVis As Boolean

    ' get who is Now Showing...local vars
    VScrollVis = NativeMethods.IsVScrollVisible(Me)
    HScrollVis = NativeMethods.IsHScrollVisible(Me)

     ' width change
    Dim delta As Integer = (orgClient.Width - ClientRectangle.Width)

    Dim TotalWidth As Integer = AllColumnsWidth()
    If (TotalWidth < ClientRectangle.Width - _VScrollWidth) And 
           (_resizedCol = -1) Then
        Exit Sub
    End If


    ' If VScroll IS showing, but WASNT showing the last time thru here
    '  ... then we are here because VScroll just appeared.
    ' That being the case, trim the desired column
    If VScrollVis And _VScroll = False Then
        ' a smarter version finds the widest column and resizes THAT one
        _resizedCol = Columns.Count - 1

        ' we have to wait for the HScroll to show up
        ' to remove it
        Columns(_resizedCol).Width -= (delta + 1)

    End If

    ' HScroll just appeared
    If HScrollVis And (delta = _VScrollWidth) Then

        ' HScroll popped up, see if it is needed
        If AllColumnsWidth() <= orgClient.Width Then
            ' no, go away foul beast !
                        NativeMethods.SBOrientation.SB_HORZ, False)

            _HScroll = False             ' hopefully

            ' allows us to set it back if the VScroll disappears
            orgClient = ClientRectangle
            ' ToDo: use this to detect when none of this is needed
            _HScroll = HScrollVis
        End If
    End If

    ' If VScroll ISNOT showing, but WAS showing the last time thru here
    '   ...then we are here because VScroll disappeared
    If VScrollVis = False And _VScroll = True Then
        ' put back the pixels

        If _resizedCol <> -1 Then
            Columns(_resizedCol).Width += (_VScrollWidth + 1)
            ' reset column tracker
            _resizedCol = -1
            ' reset to new compare size
            orgClient = ClientRectangle
        End If

    End If

    _VScroll = VScrollVis


End Sub
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