In application with heavier styles and a slower machine when items are dragged and swiped it sometimes leads to exception:
Cannot animate the 'VerticalOffset' property on a 'Telerik.Windows.Controls.TileViewPanel' using a 'System.Windows.Media.Animation.DoubleAnimationUsingKeyFrames'

Hi guys,

I am investigating a weird scrolling behavior in our app, I have more or less reproduced it in the attached sample app. I say 'more or less' because the little sample doesn't exactly have the same structure as our app but the result looks to be the same as what is happening in our software.

When declaring an unnamed style that targets the RadTileViewItem, scrolling the minimized TileViewItems while have one in the Maximized state, reverts all the minimized ones to their 'Normal' state as well as the one that was maximized. If the RadTileViewItem style is given a Key in the resource dictionary and used explicitly in the TileView's ItemContainerStyle property the scrolling works fine.

Both ways of using the style should, in my opinion, behave exactly the same.

Please take a look.

Thanks.

Initial state of TileView:
A B C
D E F
G

G is moved between B and E (current result)
A B C
D G F
E

REQUESTED RESULT:
A B C
D G F
   E

TileView: Add different methods for arranging Tile items. Asked by a client.
For example "ColumnsOnly" would only shuffle items down within the column being inserted into. However this would also mean that gaps would have to be allowed. E.g.
A B C
D E F
G

If G moved between B and E then
A B C
D G F
   E

The values are switched. 

NewState holds the value of OldState. 
OldState holds the value of NewState 

Allow users to dynamically change the DraggingItem

TextBox (or input control) is in LargeContent of  FluidContentControl in RadTileViewItem. Validation fails and Red border is shown on the TextBox. TileState is changed then it is Maximized again. Validation fails again but no red border is shown.

Add deferred scrolling support

Add GridSplitters between the columns and rows of the TileView so that rows and columns can be resized.

GridSplitters should be available when the tiles are restored or Minimized/Maximized. In the latter case, only a vertical one should be available to resize the minimized tiles' width in respect to the maximized one.

Provide support for changing the ItemContainerStyleSelector runtime.

InvalidOperationException in thrown in design time in certain situations

ScrollViewer property needed like in RadTreeview

Add a build-in paging support for the RadTileView.

The Header of the TileViewItems is bound only for the first X tiles, where X is the loadsize of the VirtualQueryableCollectionView

Implement command support for events like TileStateChanged. Allow sending the TileItem, which state is changing, as an argument.

Implement a mouse wheel support for the Horizontal ScrollBars of the control

Design time error occurs when setting MinimizedRowHeight

Add animations for items collection change (add/remove)