Codejock Developer Community : BUG: ListView: ListItems disappear

BUG: ListView: ListItems disappear : Hello, Unfortunatelly we can't...

Mon, 03 Nov 2008 01:49:06 +0000

Author: Oleg
Subject: 12574
Posted: 03 November 2008 at 1:49am

Hello,

Unfortunatelly we can't fix bugs that inside Microsoft code. ListView is based on standard ListView OS control - you can see same problem with ListView from MS controls.

Use EnsureVisible workaround.

BUG: ListView: ListItems disappear : Will there be a bug fix?

Mon, 03 Nov 2008 01:31:04 +0000

Author: Jean
Subject: 12574
Posted: 03 November 2008 at 1:31am

Will there be a bug fix?

BUG: ListView: ListItems disappear : It looks like you can put Li...

Thu, 30 Oct 2008 14:49:17 +0000

Author: jpbro
Subject: 12574
Posted: 30 October 2008 at 2:49pm

It looks like you can put ListView1.SelectedItem.EnsureVisible in your Form_Resize event as a workaround (assuming you don't mind the selected item be key visible on resize....this may be a problem in certain situations, so obviously a fix would be the best solution).

BUG: ListView: ListItems disappear : You're right Aaron &...

Thu, 30 Oct 2008 14:46:44 +0000

Author: jpbro
Subject: 12574
Posted: 30 October 2008 at 2:46pm

You're right Aaron & Jean, I see the bug now...

BUG: ListView: ListItems disappear : Hi, I can reproduce it as well....

Thu, 30 Oct 2008 14:27:57 +0000

Author: Aaron
Subject: 12574
Posted: 30 October 2008 at 2:27pm

Hi,

I can reproduce it as well. I tried with V12.0.2 and V12.1.0 Beta and both behave the same.

Just click command button and resize form height (list items will be arranged) and eventually will disappear including the scrollbar. As long as the selected item is NOT visible this behaviour will be produced every single time.

BUG: ListView: ListItems disappear : Can't reproduce in 12.1 Beta,...

Thu, 30 Oct 2008 13:07:44 +0000

Author: jpbro
Subject: 12574
Posted: 30 October 2008 at 1:07pm

Can't reproduce in 12.1 Beta, so maybe it is fixed?

BUG: ListView: ListItems disappear : ListItems disappear...

Thu, 30 Oct 2008 12:04:04 +0000

Author: Jean
Subject: 12574
Posted: 30 October 2008 at 12:04pm

ListItems disappear under certain circumstances:

-Open a new project
-put a CommandButton and a ListView on the Form1
-use this code:

Private Sub Form_Load()
  Me.Width = 2175
  Me.Height = 4110

  Command1.Top = 120
  Command1.Height = 375
  Command1.Width = 1815
  Command1.Left = 120

  ListView1.Top = 600
  ListView1.Left = 120

  ListView1.HideSelection = False
  ListView1.View = xtpListViewList

  Dim lngItem As Long
  For lngItem = 1 To 16
    ListView1.ListItems.Add , CStr(lngItem), String(lngItem, Chr(lngItem + 74))
  Next
  ListView1.Arrange = xtpListViewArrangeAutoTop
End Sub

Private Sub Form_Resize()
  On Error Resume Next
  ListView1.Height = Me.ScaleHeight - 700
  ListView1.Width = Me.ScaleWidth - 240
End Sub

Private Sub Command1_Click()
  On Error Resume Next
  Dim Item As XtremeSuiteControls.ListViewItem
  For Each Item In ListView1.ListItems
    If Item.Key = "14" Then
      Item.Selected = True
      Exit For
    End If
  Next

  ListView1.SelectedItem.EnsureVisible
End Sub

-start the application and press the button
-Item with key 14 is selected and visible: Good!
-now increase the height of the form
-ListItems disappear and there's no scrollbar

This can happen also if you resize the Form/ListView by code!
Don't I use the ListView as intended?

Another curious behavoir is that the HideSelection-Property is obviously reset if you chance the View-Property. You can check this if you change the order of the two lines in the sample code above.