Detect on worksheet change if user is deleting - vba

Question

I'd like to know how to detect if the user is deleting or inserting content into a range. If they are deleting a range say D14:D18. I'd like to then perform a macro that also deletes content in E14:E18. I just wouldn't want to delete E14:E18 if they are entering content into D14:D18.
I've tried:
If Selection.ClearContents Then
MsgBox Target.Offset(0, 3).Style
End If
But this get's me stuck in an infinite loop.
A bit more context:
I have a few hundred cells in D:D for entering quantities for services. Not everything in D:D should be touched. Only cells in D:D with .Style = "UnitInput". In E:E I have data validation that lets the user only enter contractor 1 or contractor 2 But, when content is entered in D:D I run a macro to assign the default contractor (housed in F:F) to E:E. So when the user enters quantities into D:D it correctly assigns the default contractor. And when they delete singular items from D:D I have it handling proper removal of contractors. It's only when they delete a range of items from D:D.
Full code:
Private Sub Worksheet_Change(ByVal Target As Range)
Application.ScreenUpdating = False
On Error GoTo ErrHandler:
If Selection.Rows.Count * Selection.Columns.Count = 1 Then
If Target.Offset(0, 3).Style = "Contractor" Then
If Target.Value < 1 Then
Target.Offset(0, 3).Value = ""
Else
Target.Offset(0, 3).Value = Target.Offset(0, 2).Value
End If
End If
If Target.Offset(0, 5).Style = "Markup" Then
If Target.Value = "" Then
Target.Offset(0, 5).Value = ""
ElseIf Target.Value <= Target.Offset(0, 14).Value Then
Target.Offset(0, 5).Value = "Redact 1"
ElseIf Target.Value >= Target.Offset(0, 15).Value Then
Target.Offset(0, 5).Value = "Redact 2"
Else
Target.Offset(0, 5).Value = "Redact 3"
End If
End If
Else
'!!!!!! this is where I need to handle multiple deletions. !!!!!!!
End If
Application.ScreenUpdating = True
ErrHandler:
Application.ScreenUpdating = True
Resume Next
End Sub

Answer 1

Based on your comments in chat, here is what I propose
UNTESTED
Private Sub Worksheet_Change(ByVal Target As Range)
Dim rng As Range, aCell As Range
Dim lRow As Long
'~~> Error handling, Switching off events and Intersect
'~~> As described in
'~~> http://stackoverflow.com/questions/13860894/ms-excel-crashes-when-vba-code-runs
On Error GoTo Whoa
Application.EnableEvents = False
With ActiveSheet
'~~> Find Last Row since data is dynamic
'~~> For further reading see
' http://stackoverflow.com/questions/11169445/error-in-finding-last-used-cell-in-vba
If Application.WorksheetFunction.CountA(.Cells) <> 0 Then
lRow = .Cells.Find(What:="*", _
After:=.Range("A1"), _
Lookat:=xlPart, _
LookIn:=xlFormulas, _
SearchOrder:=xlByRows, _
SearchDirection:=xlPrevious, _
MatchCase:=False).Row
End If
If lRow > 12 Then
'~~> Set your range
Set rng = Range("D13:D" & lRow)
If Not Intersect(Target, rng) Is Nothing Then
For Each aCell In rng
If Len(Trim(aCell.Value)) = 0 Then
Select Case Target.Offset(0, 3).Style
Case "Contractor"
'~~> Do Your Stuff
Case "Markup"
'~~> Do Your Stuff
'
'~~> And so on
'
End Select
End If
Next aCell
End If
End If
End With
Letscontinue:
Application.EnableEvents = True
Exit Sub
Whoa:
MsgBox Err.Description
Resume Letscontinue
End Sub

Answer 2

Here is an idea -- you have to first select a region to clear its contents. Use selection change to record the number of non-blank cells and then worksheet change to see if it drops to zero. Something like:
Dim NumVals As Long
Private Sub Worksheet_Change(ByVal Target As Range)
Dim NewCount As Long
NewCount = Application.WorksheetFunction.CountA(Target)
If NewCount = 0 And NumVals > 0 Then MsgBox Target.Address & " was cleared"
End Sub
Private Sub Worksheet_SelectionChange(ByVal Target As Range)
NumVals = Application.WorksheetFunction.CountA(Target)
End Sub
I have this code is Sheet1 and it seems to capture when I highlight a group of cells (which contains at least one value) and then hit the delete key.

Answer 3

You can use the CommandBars Undo Control to determine if the user has actually deleted something.
Bear in mind this will fire if the user any or all of the contents of the Range D14:D18, but can be adjusted in many ways to suit your exact needs. After seeing your edit, this basically means you can adjust the ranges and need be and which cells in column E it affects as well. If you need more guidance on this, let me know.
Private Sub Worksheet_Change(ByVal Target As Range)
If Not Intersect(Target, Me.Range("D14:D18")) Is Nothing Then
Dim sLastAction As String
sLastAction = Application.CommandBars("Standard").Controls("&Undo").List(1)
Debug.Print sLastAction
'manual delete 'right-click delete 'backspace delete
If sLastAction = "Clear" Or sLastAction = "Delete" Or Left(sLastAction, 9) = "Typing ''" Then
Application.EnableEvents = False
Me.Range("E14:E18").ClearContents
Application.EnableEvents = True
End If
End If
End Sub

Answer 4

Private Sub Worksheet_Change(ByVal Target As Range)
Dim ChangedRange As Range
Dim Area As Range
Dim Cell As Range
Set ChangedRange = Application.Intersect(Target, Range("D:D"))
If Not ChangedRange Is Nothing Then
Application.EnableEvents = False
For Each Area In ChangedRange.Areas
For Each Cell In Area
If IsEmpty(Cell) Then
Cell.Offset(0, 1).ClearContents
End If
Next
Next
Application.EnableEvents = True
End If
End Sub