Listview Autoscroll Problem with dynamic filling

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  15 years ago

  by sven22

  Sven Warholf

  , Denmark

  Joined 15 years ago
  Hi there,
  
  I'm crunching on this some while allready:
  
  The view is set to largeicon and when I fill up the list dynamically with items it scrolls always to the last clicked item. I can drag the scrollbar down but after releasing it jumps right back to the item I clicked and puts it on top. The wierd thing is this only happens while adding items to the view. After completion it behaves normal and I can scroll up and down regardless of the item I clicked. I realized it jumps always to the focused item.
  
  Why do I want that?
  It's a pictureviewer-component. The user klicks on a folder in a TreeView and gets to see its contents as thumbnails. As soon as the user sees the first thumbs rendered he wants to be able to perform at least an "open" operation to view the picture. When the user doubleklicks the item it triggers the opening in another window. After closing it he can go on with another item in the listview. To be able to do so the rendering of the thumbs happens in a separate thread.
  
  An interesting point is: even if I deselect the just clicked item by clicking in the white space between the thumbs it somehow still has focus since the scrollbar keeps jumping back to it.
  
  Greetings
  
  Sven.
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