/// <summary> Element dropped. </summary>
/// <param name="element"> Documentation in progress... </param>
private void DoneDragDrop(UIElement element)
{
unwireTextBlockEvents();
// backup drop index now since the call to UpdateTargetRegion below will modify the index
int?backupDropIdx = dropIdx;
// list index of dragged element
int dragIdx = IndexOf(element);
// reset default layout
UpdateDropIndexAndAnimate(dragIdx, null, null);
// remove preview adorner
if (UsePreviewAdorner)
{
PreviewAdorner.detach(ref adorner);
}
// remove previously inserted border elements
removeRowDefinitions();
// reset mouse cursor
Mouse.SetCursor(Cursors.Arrow);
// no reordering necessary - at least fade dragged element in again
if (FadeDraggedRow)
{
gridRows[dragIdx].animateOpacity(1, DraggedRowFadeInDuration, DraggedRowFadeInEasing);
}
// reorder elements if necessary
if (reorderElements(backupDropIdx, dragIdx, false))
{
// fire events
// Adapting the dropIdx according the convention of ObservableCollection.Move():
// If dropIdx > dragIdx, the position number AFTER the insertion has to be used.
RaiseRowMoved(dragIdx, backupDropIdx.Value > dragIdx ? backupDropIdx.Value - 1 : backupDropIdx.Value);
}
wireTextBlockEvents();
}
/// <summary> Move dragged element. </summary>
/// <param name="element"> Documentation in progress... </param>
private void DragMove(UIElement element)
{
// index of dragged item
int dragIdx = IndexOf(element);
// check if element position is over the grid
bool movesInGrid = grid.Contains(Mouse.GetPosition(grid));
// create / update preview adorner
if (UsePreviewAdorner)
{
PreviewAdorner.attach(ref adorner, () => element as FrameworkElement, () => gridRows[dragIdx].Snapshot, 0.5);
adorner.Offset = Vector.Add(Point.Subtract(Mouse.GetPosition(element), dragDropOrigin.Value), gridRows[dragIdx].GetSnapshotOffsetForAdorner(element));
}
Point?p = movesInGrid ? Mouse.GetPosition(grid) : (Point?)null;
// update target index, animate rows
UpdateDropIndexAndAnimate(dragIdx, p, new[] { dragIdx, dragIdx + 1 });
// set cursor
Mouse.SetCursor(movesInGrid && reorderElements(FindDropRegion(p), dragIdx, true) ? Cursors.Arrow : Cursors.No);
}