VBA-Script-for-Timeline

'==========================
Private Sub Worksheet_BeforeDoubleClick _
  (ByVal Target As Range, _
    Cancel As Boolean)
Dim str As String
Dim cboTemp As OLEObject
Dim ws As Worksheet
Set ws = ActiveSheet

Set cboTemp = ws.OLEObjects("TempCombo")
  On Error Resume Next
  With cboTemp
  'clear and hide the combo box
    .ListFillRange = ""
    .LinkedCell = ""
    .Visible = False
  End With
On Error GoTo errHandler
  If Target.Validation.Type = 3 Then
    'if the cell contains
      'a data validation list
    Cancel = True
    Application.EnableEvents = False
    'get the data validation formula
    str = Target.Validation.Formula1
    str = Right(str, Len(str) - 1)
    With cboTemp
      'show the combobox with the list
      .Visible = True
      .Left = Target.Left
      .Top = Target.Top
      .Width = Target.Width + 5
      .Height = Target.Height + 5
      .ListFillRange = str
      .LinkedCell = Target.Address
    End With
    cboTemp.Activate
    'open the drop down list automatically
    Me.TempCombo.DropDown
  End If
  
errHandler:
  Application.EnableEvents = True
  Exit Sub

End Sub
'=========================================
Private Sub TempCombo_LostFocus()
  With Me.TempCombo
    .Top = 10
    .Left = 10
    .Width = 0
    .ListFillRange = ""
    .LinkedCell = ""
    .Visible = False
    .Value = ""
  End With
End Sub

Private Sub TempCombo_KeyDown(ByVal _
     KeyCode As MSForms.ReturnInteger, _
     ByVal Shift As Integer)
  Select Case KeyCode
    Case 9 'Tab
      ActiveCell.Offset(0, 1).Activate
    Case 13 'Enter
      ActiveCell.Offset(1, 0).Activate
    Case Else
        'do nothing
  End Select
End Sub
'====================================